Federal Register, Volume 85 Issue 62 (Tuesday, March 31, 2020) 2020 Federal Register, 85 FR 18054-18099; Centralized Library: U.S. Fish and Wildlife Service -

[Federal Register Volume 85, Number 62 (Tuesday, March 31, 2020)]
[Proposed Rules]
[Pages 18054-18099]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2020-06384]

[[Page 18053]]

Vol. 85

Tuesday,

No. 62

March 31, 2020

Part III

Department of the Interior

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Fish and Wildlife Service

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50 CFR Part 17

Endangered and Threatened Wildlife and Plants; Withdrawal of the
Proposed Rules To List the Bi-State Distinct Population Segment of
Greater Sage-Grouse With Section 4(d) Rule and To Designate Critical
Habitat; Proposed Rule

Federal Register / Vol. 85 , No. 62 / Tuesday, March 31, 2020 /
Proposed Rules

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DEPARTMENT OF THE INTERIOR

Fish and Wildlife Service

50 CFR Part 17

[Docket Nos. FWS-R8-ES-2018-0106 and FWS-R8-ES-2018-0107; FF09E21000
FXES11110900000 201]
RINs 1018-BD87 and 1018-BD88

AGENCY: Fish and Wildlife Service, Interior.

ACTION: Proposed rule; withdrawal.

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SUMMARY: We, the U.S. Fish and Wildlife Service (Service), withdraw the
proposed rule to list the Bi-State distinct population segment (DPS) of
greater sage-grouse (Centrocercus urophasianus) in California and
Nevada as threatened under the Endangered Species Act of 1973, as
amended (Act). We concurrently withdraw the proposed rule under section
4(d) of the Act and the proposed rule to designate critical habitat for
the DPS. These withdrawals are based on our conclusion that the threats
to the DPS as identified in the proposed listing rule no longer are as
significant as believed at the time of publication of the 2013 proposed
rule. We find the best scientific and commercial data available
indicate that the threats to the DPS and its habitat, given current and
future conservation efforts, are reduced to the point that the DPS does
not meet the Act's definition of an ``endangered species'' or of a
``threatened species.''

DATES: The U.S. Fish and Wildlife Service is withdrawing proposed rules
published on October 28, 2013 (78 FR 64328 and 64358) as of March 31,
2020.

ADDRESSES: Relevant documents are available on the internet at either
Docket No. FWS-R8-ES-2018-0106 or Docket No. FWS-R8-ES-2018-0107 on
http://www.regulations.gov. Relevant documents used in the preparation
of this withdrawal are also available for public inspection, by
appointment, during normal business hours at the Reno Fish and Wildlife
Office (see FOR FURTHER INFORMATION CONTACT).

FOR FURTHER INFORMATION CONTACT: Lee Ann Carranza, Deputy Field
Supervisor, Reno Fish and Wildlife Office, 1340 Financial Boulevard,
Suite 234, Reno, NV 89502; telephone 775-861-6300. Persons who use a
telecommunications device for the deaf (TDD) may call the Federal Relay
Service at 800-877-8339.

SUPPLEMENTARY INFORMATION:

Executive Summary

Why we need to publish this document. Under the Act, a species may
warrant protection through listing if it is endangered or threatened
throughout all or a significant portion of its range. We issued a
proposed rule to list a distinct population segment (DPS) of greater
sage-grouse in California and Nevada (known as the Bi-State DPS) in
2013. However, this document withdraws that proposed rule because we
now determine that threats identified in the proposed rule have been
reduced such that listing is not necessary for this DPS. Accordingly,
we also withdraw the proposed rule under section 4(d) of the Act and
the proposed critical habitat designation.
The basis for our action. Under the Act, we may determine that a
species is an endangered or threatened species because of any of five
factors: (A) The present or threatened destruction, modification, or
curtailment of its habitat or range; (B) overutilization for
commercial, recreational, scientific, or educational purposes; (C)
disease or predation; (D) the inadequacy of existing regulatory
mechanisms; or (E) other natural or manmade factors affecting its
continued existence. We have determined that threats have been reduced
such that listing is not necessary for the Bi-State DPS of greater
sage-grouse.
Peer review. In accordance with our joint policy on peer review
published in the Federal Register on July 1, 1994 (59 FR 34270), and
our August 22, 2016, memorandum updating and clarifying the role of
peer review of listing actions under the Act, we sought the expert
opinions of five appropriate specialists regarding the species report.
We received responses from three specialists, which informed this
finding. The purpose of peer review is to ensure that our listing
determinations, critical habitat designations, and 4(d) rules are based
on scientifically sound data, assumptions, and analyses. The peer
reviewers have expertise in the biology, habitat, and threats to the
greater sage-grouse.

Acronyms and Abbreviations Used in This Document

We use many acronyms and abbreviations throughout this document. To
assist the reader, we provide a list of these here for easy reference:

ac = acres
Act or ESA = Endangered Species Act of 1973, as amended (16 U.S.C.
1531 et seq.)
BLM = Bureau of Land Management
BSAP = Bi-State Action Plan
BSLPG = Bi-State Local Planning Group
BSLSP = Bi-State Lek Surveillance Program
CDFW = California Department of Fish and Wildlife (formerly
California Department of Fish and Game (CDFG))
CFR = Code of Federal Regulations
COT = Conservation Objectives Team
CPT = conservation planning tool
CRI = credible intervals
DPS = distinct population segment
EOC = Executive Oversight Committee
FR = Federal Register
ha = hectares
HTNF = Humboldt-Toiyabe National Forest
IPM = integrated population model
LADWP = Los Angeles Department of Water and Power
LRMP = land resource management plan
NDOW = Nevada Department of Wildlife
NEPA = National Environmental Policy Act (42 U.S.C. 4321 et seq.)
NFMA = National Forest Management Act (16 U.S.C. 1600 et seq.)
NRCS = Natural Resources Conservation Service
OHV = off-highway vehicle
PECE = Policy for Evaluation of Conservation Efforts When Making
Listing Decisions
PEIS = Programmatic Environmental Impact Statement
PMU = population management unit
RHA = rangeland health assessment
RMP = resource management plan
Service = U.S. Fish and Wildlife Service
TAC = Technical Advisory Committee
USDA = U.S. Department of Agriculture
USFS = U.S. Forest Service
USGS = U.S. Geological Survey
WAFWA = Western Association of Fish and Wildlife Agencies
WNv = West Nile virus

Previous Federal Actions

The Bi-State DPS of the greater sage-grouse has a long and complex
rulemaking history. Here, we will discuss only the major Federal
actions related to the species. For a detailed description of previous
Federal actions, please refer to the previous withdrawal of the
proposed listing rule, published on April 23, 2015 (80 FR 22828), and
the Policy for Evaluation of Conservation Efforts When Making Listing
Decisions (PECE) analysis we prepared as a supporting document for this
determination (Service 2019, pp. 1-6).
On October 28, 2013, we published a proposed rule to list the Bi-
State DPS as a threatened species with a 4(d) rule (78 FR 64358). On
that same day, we published a proposed rule to designate critical
habitat for the Bi-State DPS (78 FR 64328).
On April 23, 2015, we withdrew the proposed listing rule, the
proposed 4(d) rule, and the proposed critical habitat rule (80 FR
22828). This withdrawal

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was based on our conclusion that the threats to the DPS as identified
in the proposed listing rule were no longer as significant as believed
at the time of publication of the proposed rule. We found that the best
scientific and commercial data available indicated that the threats to
the DPS and its habitat, given current and future conservation efforts
as analyzed under PECE, were reduced to the point that the DPS did not
meet the Act's definition of an ``endangered species'' or of a
``threatened species.''
On March 9, 2016, Desert Survivors, the Center for Biological
Diversity, WildEarth Guardians, and Western Watershed Project filed
suit in the U.S. District Court for the Northern District of
California. The suit challenged the withdrawal of the proposal to list
the Bi-State DPS. On May 5, 2018, the court issued a decision. The
April 23, 2015, withdrawal was vacated and remanded to the Service for
further consideration. The court's action reinstated the prior proposed
rules to list and to designate critical habitat for the Bi-State DPS,
thereby returning the process to the proposed rule stage, and the
status of the Bi-State DPS effectively reverted to that of a species
proposed for listing for the purposes of consultation under section 7
of the Act. The court's action also reinstated the proposed 4(d) rule
and the proposed critical habitat designation for the Bi-State DPS.
On April 12, 2019, we published in the Federal Register (84 FR
14909) a document that announced that the proposed rules were
reinstated and the public comment periods were reopened for 60 days and
that we would publish a final listing determination on or before
October 1, 2019.
On October 1, 2019, we announced a 6-month extension of the final
listing determination to April 1, 2020 (84 FR 52058). We took that
action based on substantial disagreement regarding the sufficiency and
accuracy of the available data relevant to the proposed listing, which
made it necessary to solicit additional information. That document
reopened the public comment period on the proposed listing and critical
habitat rules for an additional 30 days.

Supporting Documents

We prepared a species report for the Bi-State DPS (Service 2020,
entire). The species report represents a compilation of the best
scientific and commercial data available concerning the status of the
species, including the impacts of past, present, and future factors
(both negative and beneficial) affecting the species. The Service sent
the species report to five independent peer reviewers and received
three responses. The Service also sent the species report to all
pertinent Federal, Tribal, and State partners, including scientists
with expertise in sage-grouse and sage-brush habitat in the Bi-State
area. We received reviews from six partners (Humboldt-Toiyabe National
Forest (HTNB), Inyo National Forest, two Bureau of Land Management
(BLM) offices: Bishop and Carson City, the California Department of
Fish and Wildlife (CDFW), and the Nevada Department of Wildlife
(NDOW)). These comments have been incorporated into the species report
and informed this document.

Summary of Changes From the Proposed Rule

Based upon our review of the public comments, Federal and State
agency comments, peer review comments, issues addressed at the public
hearings, and any new relevant information that became available since
the publication of the proposal and including new relevant information
that has become available since the prior withdrawal decision, we
reevaluated our proposed listing rule and made changes as appropriate
in this withdrawal. Other than minor clarifications and incorporation
of additional information on the species' biology and populations, this
determination differs from the proposal in the following ways:
(1) A different status determination. Based on our analyses of the
potential threats to the species, and our consideration of partially
completed, ongoing and future conservation efforts (as outlined below
in Policy for Evaluation of Conservation Efforts When Making Listing
Decisions), we have determined that the Bi-State DPS should not be
listed as a threatened species. Specifically, we have determined that
conservation efforts (as outlined in the Bi-State Action Plan (BSAP),
Agency commitment letters, and our detailed PECE analysis (all of which
are available at either Docket No. FWS-R8-ES-2018-0106 or Docket No.
FWS-R8-ES-2018-0107 on http://www.regulations.gov as well as the
Technical Advisory Committee (TAC) comprehensive project database))
will continue to be implemented because (to date) we have a documented
track record of active participation and implementation by the
signatory agencies and commitments to continue implementation into the
future.
Conservation measures, such as (but not limited to) pinyon-juniper
removal, establishment of conservation easements for critical brood-
rearing habitat, cheatgrass (Bromus tectorum) removal, permanent and
seasonal closure of roads near leks, removal and marking of fencing,
and restoration of riparian/meadow habitat have been occurring over the
past decade, are currently occurring, and have been prioritized and
placed on the agencies' implementation schedules for future
implementation. Agencies have committed to remain participants in the
BSAP and to continue conservation of the DPS and its habitat.
Additionally, the BSAP has sufficient methods for determining the type
and location of the most beneficial conservation actions to be
implemented, including continued development of new population and
threats information in the future that will guide conservation efforts.
As a result of these actions, this document withdraws the proposed
rules as published on October 28, 2013 (78 FR 64328; 78 FR 64358).
We have also updated our Significant Portion of the Range analysis
based on a recent court finding regarding the policy.
(2) Addition of PECE analysis. This document includes the Policy
for Evaluation of Conservation Efforts When Making Listing Decisions
section, which includes some information presented in the Available
Conservation Measures section of the proposed listing rule.
(3) Population impacts. This document includes a discussion of the
impacts of small population size and population isolation on the Bi-
State DPS.
(4) New information. Following publication of the proposed listing
rule, we received new information pertinent to this rulemaking action.
Some of the information was in response to our request for scientific
peer review of the proposed listing rule, while other information was a
result of new literature now available, or updated regulations. We
incorporated all new information into the Species Report (Service 2020,
entire), which is available on the internet at http://www.regulations.gov under either Docket No. FWS-R8-ES-2018-0106 or
Docket No. FWS-R8-ES-2018-0107, as well as within this document where
appropriate. New information includes (but is not limited to):
A variety of biological or habitat clarifications, such as
hen movement distances, nesting success, and invasive plant species
influence on sagebrush-habitat dynamics.
Updated trend and population analyses. Multiple new papers
examining the population dynamics and trends of the Bi-State DPS
(Coates et al. 2014, entire; Coates et al. 2018, entire; Mathews et al.
2018, entire; Coates et al.

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2020, entire). These studies are incorporated into the Species Report
and discussed throughout this document.
Two genetic evaluations, one of which concluded there are
three or four unique genetic clusters within the Bi-State area (Oyler-
McCance et al. 2014, p. 8), and a second that concluded there were five
unique genetic clusters (Tebbenkamp 2014, p. 18). Tebbenkamp (2014) did
not evaluate the Pine Nut population; thus, six populations may have
been identified by Tebbenkamp (2014) had the Pine Nut population data
been available.
New information on the effectiveness of pinyon-juniper
removal has become available in recent years (Prochazka et al. 2017,
entire; Severson et al. 2017, entire; Sandford et al. 2017, entire;
Coates et al. 2017b, entire; Olsen 2019, entire). These studies are
incorporated into the Species Report and discussed throughout this
document.
(5) New ESA factor D analysis. In the 2013 proposed listing rule,
we analyzed the adequacy of existing regulatory mechanisms in a
separate section. Here, we evaluate the effects of existing regulatory
mechanisms within each threat analysis, rather than evaluating
regulatory mechanisms in a separate section, so that it is clear how
the existing regulatory mechanisms relate to the stressor being
analyzed.
(6) Significant portion of the range (SPR) analysis. Since 2013, we
have a new policy regarding the Service's interpretation of the phrase
``significant portion of the range'' (79 FR 37578; July 1, 2014). We
also have new guidance regarding application of that policy (Service
2017, entire), which was published subsequent to the 2015 withdrawal of
the proposed rule. Additionally, certain parts of the policy have been
invalidated by court orders. We have completed our SPR analysis for the
Bi-State DPS in accordance with the 2014 policy and the 2017 guidance
as further refined by applicable court decisions.

Background

In our 12-month findings on petitions to list three entities of
sage-grouse (75 FR 13910, March 23, 2010), we found that the Bi-State
population of greater sage-grouse in California and Nevada meets our
criteria to qualify as a DPS of the greater sage-grouse under Service
policy (61 FR 4722, February 7, 1996). We reaffirmed this finding in
the October 28, 2013, proposed listing rule (78 FR 64358) and do so
again in this document. This determination is based principally on
genetic information (Benedict et al. 2003, p. 308; Oyler-McCance et al.
2005, p. 1307), where the DPS was found to be both markedly separated
and significant to the remainder of the greater sage-grouse taxon. The
Bi-State DPS defines the far southwestern limit of the species' range
along the border of eastern California and western Nevada (Stiver et
al. 2006, pp. 1-11; 71 FR 76058, December 19, 2006).
Although the Bi-State DPS is a genetically unique and markedly
separate population, the DPS has similar life-history and habitat
requirements to the greater sage-grouse throughout the rest of its
range. In the October 28, 2013, proposed listing rule (78 FR 64358),
the species report, and this document, we use information specific to
the Bi-State DPS where available but still apply scientific management
principles for greater sage-grouse that are relevant to the Bi-State
DPS's management needs and strategies. This practice is followed by the
wildlife and land management agencies that have responsibility for
management of both the DPS and its habitat.
A detailed discussion of the Bi-State DPS's description, taxonomy,
habitat (sagebrush ecosystem), seasonal habitat selection, life-history
characteristics, home range, life expectancy and survival rates,
historical and current range distribution, population estimates and lek
(sage-grouse breeding complex) counts, population trends, and land
ownership information is available in the species report (Service 2020,
entire). The species report represents a compilation of the best
scientific and commercial data available concerning the status of the
Bi-State DPS, including the past, present, and future threats to this
DPS. The species report and other materials relating to this final
agency action can be found at http://www.regulations.gov under either
Docket No. FWS-R8-ES-2018-0106 or Docket No. FWS-R8-ES-2018-0107.

Habitat and Life History

Sage-grouse depend on a variety of shrub and shrub-steppe
vegetation communities throughout their life cycle (Schroeder et al.
2004, p. 364). Sagebrush is the most widespread vegetation in the
intermountain lowlands of the western United States and is considered
one of the most imperiled ecosystems in North America (West and Young
2000, p. 259; Knick et al. 2003, p. 612; Miller et al. 2011, p. 147).
Most species of sagebrush are killed by fire; historical fire-return
intervals are estimated to be as long as 350 years (West 1983, p. 341;
Miller and Eddleman 2000, p. 17; West and Young 2000, p. 259; Baker
2011, pp. 191-192). Natural sagebrush recolonization in burned areas
depends on the presence of adjacent live plants for a seed source or on
the seed bank, if present, and requires from decades to over a century
for full recovery (Miller and Eddleman 2000, p. 17; Baker 2011, pp.
194-195).
Sage-grouse require large, interconnected expanses of sagebrush
with healthy, native understories, in part to accommodate their
seasonal shifts in habitat selection within the sagebrush ecosystem
(Service 2020, p. 11). Sage-grouse exhibit strong site fidelity
(loyalty to a particular area) to migration corridors and seasonal
habitats, including breeding, nesting, brood-rearing, and wintering
areas; they exhibit this fidelity even when a particular area may no
longer be of value, limiting the species' adaptability to habitat
changes (Service 2020, p. 11). However, recent research has suggested
that this high degree of site fidelity may be more flexible than has
traditionally been considered, at least with respect to certain
restoration actions (e.g., tree removal; Sandford et al. 2017, p. 64;
Severson et al. 2017, p. 55).
During the spring breeding season, male sage-grouse gather to
perform courtship displays at leks or traditional strutting grounds.
Areas of bare soil, short-grass steppe, windswept ridges, exposed
knolls, or other relatively open sites typically serve as leks
(Patterson 1952, p. 83; Connelly et al. 2004, p. 3-7 and references
therein). The proximity, configuration, and abundance of nesting
habitat are key factors influencing lek location (Connelly et al. 1981,
pp. 153-154; Connelly et al. 2000a, p. 970). Leks can be formed
opportunistically at any appropriate site within or adjacent to nesting
habitat (Connelly et al. 2000a, p. 970); therefore, lek habitat
availability is not considered a limiting factor for sage-grouse
(Schroeder et al. 1999, p. 4). Leks range in size from less than 0.04
ha (0.1 ac) to over 36 ha (90 ac) (Connelly et al. 2004, p. 4-3) and
can host from a few to hundreds of males (Johnsgard 2002, p. 112).
The distances sage-grouse move between seasonal habitats are highly
variable across the occupied range (Connelly et al. 1988, pp. 119-121).
Migration can occur between distinct winter, breeding, and summer areas
or the seasonal-use areas may be variously integrated (e.g., winter and
breeding areas may be the same and brood-rearing sites are disjunct).
Information available regarding seasonal migrations and migratory
corridors for sage-grouse in the Bi-State area is variable. Some local
breeding complexes (a general

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aggregation of birds associated with a particular lek or collection of
leks in relatively close proximity to one another) remain fairly
resident throughout the year while others demonstrate a more itinerant
nature (Casazza et al. 2009, p. 8).
Still, all sage-grouse gradually move from sagebrush uplands to
more mesic areas (moist areas such as upland meadows) during the late
brood-rearing/summer period (3 weeks post-hatch) in response to summer
desiccation of herbaceous vegetation (Connelly et al. 2000a, p. 971;
Atamian et al. 2010, p. 1538; Connelly et al. 2011b, pp. 76-77 and
references therein; Pratt et al. 2017, p. 635). Brood-rearing foraging
habitats with increased perennial forb cover and plant species
richness, greater meadow to sagebrush edge (ratio of perimeter to
area), and a greater distance from woodlands provide for an increased
probability of successful recruitment (Casazza et al. 2011, pp. 162-
163). Sage-grouse will use free water, although they do not require it
since they obtain water from their food. However, natural water bodies
and reservoirs provide mesic areas often rich in succulent forb and
insect food sources, thereby attracting sage-grouse hens with broods
(Connelly et al. 2004, p. 4-12).
Non-migratory sage-grouse populations have been described as those
with seasonal movements of less than 10 km (6.2 mi; Connelly et al.
2000a, pp. 968-969), while birds in migratory populations may travel
well over 100 km (62 mi) (Tack et al. 2012, p. 65). Despite the
documentation of extensive seasonal movements in this species,
dispersal (permanent rather than seasonal movement) abilities of sage-
grouse to other areas are assumed to be low (Fedy et al. 2012, p. 1066;
Tack et al. 2012, p. 65; Davis et al. 2014, p. 716). Sage-grouse
dispersal is overall poorly understood and appears sporadic, if not
rare (Service 2020, p. 12).

Range and Population Estimates

The Bi-State DPS of greater sage-grouse historically occurred
throughout most of Mono, eastern Alpine, and northern Inyo Counties,
California (Hall et al. 2008, p. 97), and portions of Carson City,
Douglas, Esmeralda, Lyon, Mineral, and perhaps Storey County in Nevada
(Gullion and Christensen 1957, pp. 131-132; Espinosa 2019, pers.
comm.). The current range of the DPS in California is presumed to be
reduced from the historical range (Leach and Hensley 1954, p. 386; Hall
1995, p. 54; Schroeder et al. 2004, pp. 368-369), but the extent of
range loss is not well understood.
Current management of the Bi-State DPS employs Population
Management Units (PMUs) for Nevada and California as tools for defining
and monitoring sage-grouse distribution. The PMU boundaries represent
generalized populations or local breeding complexes and were delineated
based on aggregations of leks, known seasonal habitats, and telemetry
data. Six PMUs were designated for the Bi-State DPS (from north to
south): Pine Nut, Desert Creek-Fales, Bodie, Mount Grant, South Mono,
and White Mountains (Figure 1; Table 1). These six PMUs represent a
combined total of approximately 50 active leks (see Table 1 below;
Service 2020, pp. 21-33). Leks are considered either active (e.g., two
or more strutting males during at least 2 years in a 5-year period),
inactive (e.g., surveyed three or more times during one breeding season
with no birds detected and no sign (e.g., droppings) observed),
historical (e.g., no strutting activity for 20 years and have been
checked according to State protocol at least intermittently), or
unknown/pending (e.g., sign was observed, and one or no strutting males
observed, or a lek that had activity the prior year but was not
surveyed or surveyed under unsuitable conditions during the current
year and reported one or no strutting males).
BILLING CODE 4333-15-P

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[GRAPHIC] [TIFF OMITTED] TP31MR20.012

BILLING CODE 4333-15-C

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Table 1--Bi-State DPS PMUs, PMU Size, Estimated Suitable Sage-Grouse Habitat, Average Number of Leks, Average
Number of Active Leks, and Range of Maximum Males on Leks Within Each PMU (2003-2018)
[Number pairs in parentheses are lower and upper limits of the 95 percent credible interval. Area values for
``Total Size'' and ``Estimated Suitable Habitat'' may not sum due to rounding]
----------------------------------------------------------------------------------------------------------------
Estimated
Total size in suitable Average number Range in
PMU hectares habitat in Average number of active leks maximum male
(acres) (*) hectares of leks (***) (***[dagger]) counts (****)
(acres) (**)
----------------------------------------------------------------------------------------------------------------
Pine Nut..................... 232,440 77,848 7.3 (2.0, 9.0). 1.8 (0.3, 4.7). 0-67
(574,372) (192,367)
Desert Creek-Fales 229,858 105,281 12.8 (8.3, 6.8 (5.0, 9.7). 61-220
[dagger][dagger]. (567,992) (260,155) 15.0).
Mount Grant [dagger][dagger]. 282,907 45,786 9.6 (5.0, 11.0) 4.4 (1.3, 7.0). 12-220
(699,079) (113,139)
Bodie[dagger][dagger]........ 141,490 105,698 17.3 (12.3, 13.1 (9.7, 137-512
(349,630) (261,187) 20.0). 16.7).
South Mono................... 234,508 138,123 15.6 (12.3, 19) 13.3 (11.0, 172-418
(579,482) (341,311) 16.7).
White Mountains.............. 709,768 53,452 2 + (not 2 + (not Not available
(1,753,875) (132,083) available). available).
Total (all PMUs combined).... 1,830,972 526,188 64.6 (41.9, 41.4 (29.3, 427-1,409
(4,524,430) (1,300,238) 76.0). 56.8).
----------------------------------------------------------------------------------------------------------------
* BSLPG (2004, pp. 11, 32, 63, 102, 127, 153).
** Bi-State TAC (2012, unpublished data); BLM (2014, unpublished data).
*** Derived from Mathews et al. 2018, Table 6 and Figure 17.
**** Derived from NDOW and CDFW lek databases. Low and high counts occurred in 2008 and 2012, respectively.
However, there was variation in annual peak male counts across PMUs; therefore, column does not sum to total.
[dagger] Active--two or more strutting males during at least 2 years in a 5-year period.
[dagger][dagger] Part of the North Mono population segment in some early population analyses.

Sage-grouse populations in the Bi-State area appear to be isolated
to varying degrees from one another (Casazza et al. 2009, entire;
Oyler-McCance and Casazza 2011, p. 10; Tebbenkamp 2012, p. 66; Oyler-
McCance et al. 2014, p. 8; Tebbenkamp 2014, p. 18). Birds in the White
Mountains PMU as well as those in the South Mono PMU are largely
isolated from sage-grouse populations in the remainder of the Bi-State
DPS (Casazza et al. 2009, pp. 34, 41; Oyler-McCance and Casazza 2011,
p. 10; Tebbenkamp 2012, p. 66). Traditionally, the Pine Nut PMU was
presumed isolated; however, recent data show birds are capable of
moving south into the Sweetwater Mountains in the Desert Creek-Fales
PMU and even further south into the Bodie PMU (USGS 2014b, entire). It
is not apparent that birds leaving the Pine Nuts are returning. While
adults are unlikely to switch breeding populations, it is likely that
genetic material is transferred among these northern populations
through the natural movements of young of the year birds, as long as
there are established populations available in which to emigrate.
However, fine-scale genetic differentiation among sage-grouse
populations is at a relatively small geographic scope (approximately 10
km (6 mi)), suggesting dispersal among populations is highly restricted
(Jahner et al. 2016, pp. 8-9).
Two independent genetic evaluations have concluded there are three
or four (Oyler-McCance et al. (2014, p. 8) or five (Tebbenkamp 2014, p.
18) unique genetic clusters in the Bi-State area. The latter study did
not evaluate the Pine Nut population (Pine Nut PMU), which has been
found to be unique (Oyler-McCance et al. 2014, p. 8). Based on this
information, we presume that there are likely three to six populations
or groups of birds in the Bi-State area that largely operate
demographically independent of one another.
Four separate statistical approaches to assessing the population
trend of the Bi-State DPS have been conducted, with two of these
approaches being repeated following additional years of data
collection. The four approaches are: (1) Connelly et al. 2004; (2)
WAFWA 2008, (3) Garton et al. (2011 and 2015); and (4) U.S. Geological
Survey (USGS) 2014, 2018, and 2019 (Coates et al. 2014, Coates et al.
2018, Mathews et al. 2018; Coates et al. 2020). In 2004, WAFWA
conducted a partial population trend analysis for the Bi-State area
(Connelly et al. 2004, chapter 6). The WAFWA recognizes four
populations of sage-grouse in the Bi-State area, which represent the
same overall extent delineated by the six PMUs described in the 2012
BSAP and this document. Two of the WAFWA populations (North Mono Lake
and South Mono Lake) had sufficient data for trend analysis (Connelly
et al. 2004, pp. 6-60 to 6-62). The North Mono Lake population
encompasses the Bodie, Mount Grant, and Desert Creek-Fales PMUs, while
the South Mono Lake population encompasses the South Mono PMU. The
North Mono Lake population displayed a significant negative trend from
1965 to 2003, and the South Mono Lake population displayed a positive
numerical trend, albeit not statistically significant, over this same
period (Connelly et al. 2004, pp. 6-69 to 6-70). In 2008, WAFWA (2008,
Appendix D) conducted a trend analysis on the same two populations
identified above using a different statistical method for the periods
from 1965 to 2007, 1965 to 1985, and 1986 to 2007. The trend for the
North Mono Lake population, as measured by maximum male attendance at
leks, was negative from 1965 to 2007 and 1965 to 1985, but variable
from 1986 to 2007; results suggest an increasing trend beginning in
about 2000. Results for the South Mono Lake population suggested a
negative trend from 1965 to 2007, a stable trend from 1965 to 1985, and
a variable trend from 1986 to 2007; these results also suggest a
positive trend beginning around 2000.
In 2011, Garton et al. (2011, pp. 324-330) used a new approach to
conduct a third trend analysis on the same populations used in the two
previous WAFWA analyses. In this study, the average number of males per
lek in the

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North Mono Lake population declined by 35 percent and the average
number of males per active lek declined by 41 percent from the 1965-
1969 to 2000-2007 assessment periods (Garton et al. 2011, p. 324).
Based on a reconstructed minimum population estimate for males from
1965 to 2007, the overall population showed irregular fluctuations
between peaks in 1970 and 1987 of 520 to 670 males, with lows above 100
and no consistent long-term trend over the 40-year period. In the South
Mono Lake population, the average number of males per lek increased by
218 percent from the 1965-1969 to 1985-1989 assessment periods but
declined by 49 percent from the 1985-1989 to 2000-2007 assessment
periods (Garton et al. 2011, p. 325). Based on reconstructed minimum
male counts, the population showed no obvious trend through time with
between 200 and 600 males attending leks. The average annual rate of
change for both populations suggested that population growth has been,
at times, both positive and negative over the past 40 years (Garton et
al. 2011, pp. 324-330).
In 2015, the researcher updated this analysis by accumulating and
analyzing several years of additional of data (Garton et al. 2015,
entire). The updated estimates of population performance largely
remained unchanged, while the outlook for persistence improved. For the
North Mono Lake population, the estimated minimum number of males
increased by 25 percent in 2013 as compared to 2007, while the
probability of declining below a (researcher-defined) quasi-extinction
threshold decreased (Garton et al. 2015, pp. 13-14). For the South Mono
Lake population, the estimated minimum number of males decreased by six
percent in 2013 as compared to 2007, although the probability of
declining below the quasi-extinction threshold remained generally
unchanged. For both populations, the predicted population size in 30
and 100 years increased in 2013 as compared to 2007 (Garton et al.
2011, pp. 376-377; Garton et al. 2015, p. 45). This approach suggests
both of these populations will remain relatively small, as they have
historically. Modeled weighted probabilities of either population
declining below an effective population sizes of 50 individuals in 30
and 100 years are generally low (approximately 8 percent in 30 years
and 22 percent in 100 years for both populations; Garton et al. 2015,
p. 14).
In 2014, the USGS completed an analysis of population trends in the
Bi-State area spanning the years 2003 to 2012 (Coates et al. 2014,
entire). This analysis, termed an Integrated Population Model (IPM),
integrates a variety of data such as lek counts and vital rates to
inform an estimate of lambda (population growth) within the DPS. This
analysis evaluated several populations in the Bi-State area including
the Pine Nuts (Pine Nut PMU), Fales (California portion of the Desert
Creek-Fales PMU), Desert Creek (Nevada Portion of the Desert Creek-
Fales PMU), Bodie Hills (Bodie PMU), Parker Meadows (South Mono PMU),
and Long Valley (South Mono PMU). It did not evaluate the populations
in the Mount Grant or White Mountains PMUs due to data limitations.
Results at that time suggested a stable trend in population growth
across the entire Bi-State area between 2003 and 2012 (i.e., both
increasing and decreasing at an equal rate; Coates et al. 2014, p. 19).
However, the trend in population growth was variable among populations
(Coates et al. 2014, pp. 14-15).
Since the 2013 proposed rule and the 2015 withdrawal of the
proposed listing rule, this analysis has been updated, once using a 13-
year dataset spanning the years 2003 through 2015, again using 15 years
of data spanning the years 2003 through 2017, and most recently using
an approach that segmented the trends into three time intervals (Coates
et al. 2018, entire; Mathews et al. 2018, entire; Coates et al. 2020,
p. 8). The later approach was adopted to account for population cycling
in sage-grouse; that is, regular periods of growth and decline
naturally experienced by sage-grouse rangewide (Garton et al. 2011, p.
338). Indeed, it became apparent after analyzing the 13-year and 15-
year datasets that the resulting estimates of population growth rates
were being biased low due to an overrepresentation of down cycle years.
To alleviate this bias, the latest trend analysis analyzes three time
intervals that span one, two, and three cycles, with the start and stop
points occurring in the troughs of a cycle. The three time intervals
are 1995-2018, 2001-2018, and 2008-2018. Not all populations had
sufficient historical data to evaluate all three time periods and thus
analysis was constrained to one or two time periods depending on the
population. The most recent analysis includes results from the Mount
Grant and White Mountains PMUs, which were previously excluded due to
insufficient data.
The results of the most recent iteration of the IPM suggests a
general pattern of population cycling within an otherwise stable
population across the Bi-State DPS with additional evidence that
oscillations were influenced by drought conditions in recent years
(Coates et al. 2018, pp. 250, 252; Coates et al. 2020, p. 27).
Furthermore, variation among individual PMU trends was apparent. The
credible intervals (CRIs) reported in this study represent the range of
interannual variation in lambda; that is, while annual median
population growth for the Bi-State DPS as a whole in the period 1995-
2019 is 1.018 (or approximately a 2 percent annual increase), the CRI
reported (0.737-1.418) represents the variation in estimated lambda as
it cycles from low to high over the study period, rather than the error
in the median estimate for any given year.
As discussed above, this analysis estimated that, across the Bi-
State as a whole, estimated median population growth was 1.018 (CRI =
0.737-1.418) from 1995 through 2018, 0.989 (CRI = 0.677-1.343) from
2001 through 2018, and 0.988 (CRI = 0.704-1.304) from 2008 through 2018
(Coates et al. 2020, Table 3). More specifically, over the past decade
only the Bodie Hills and Parker Meadows population demonstrated an
average annual positive growth (lambda = 1.061 and lambda = 1.048,
respectively). The remaining populations including Mount Grant (lambda
= 0.989), Fales, (lambda = 0.965), Pine Nut (lambda = 0.835), Desert
Creek (lambda = 0.938), Long Valley (lambda = 0.96), and the White
Mountains (lambda = 0.85; Coates et al. 2020, Table 3) averaged slight
negative growth, although in each case the 95 percent CRI overlapped 1.
Additional analysis suggests that over the past 5 years performance of
some individual leks in Long Valley, Fales, Bodie Hills, Mount Grant,
and to a lesser extent Sagehen (a population in the South Mono PMU)
have been trending (negatively) in a pattern that deviates from the Bi-
State at large (Coates et al. 2020, Table 3). This analysis suggests
that alternative factors (such as anthropogenic disturbance) and not
climate or weather may be acting to influence these specific sites.
In general, these four approaches (with some being run more than
once) suggest that the trend in population growth within the Bi-State
has fluctuated over the past 40 years (both increased and decreased),
but over the entire timeframe has remained relatively stable. It
appears that some populations (Pine Nut, Mount Grant, Bodie and Desert
Creek) display greater variation in population growth (both positive
and negative) and that trends among populations are variable (WAFWA
2008, Appendix D; Garton et al. 2011, p. 324, Coates et al. 2020, p.
34). Differences in

[[Page 18061]]

population trends across the same time periods in the newest study
(compared to previous studies) may be due to the fact that the previous
studies did not correct for the effects of population cycling (Coates
et al. 2020, p. 30).
Two studies forecasted the probability that some populations would
become extirpated. Garton et al. (2015, p. 41) used their reconstructed
male counts to forecast future probabilities of population persistence
assuming that past conditions persist into the future (a potentially
unrealistic assumption). They conclude that the probabilities of
declining below a quasi-extinction threshold (as defined by less than
50 breeding adults per population) were approximately 8 and 22 percent
over the next 30 and 100 years, respectively, for both the North Mono
Lake and South Mono Lake populations. Furthermore, Garton et al. (2015,
p. 41) indicate that long-term persistence (as defined by more than 500
breeding adults per population, a standard number for persistence
studies) for both core populations has an estimated 100 percent
probability of dropping below this 500-adult threshold in the next 30
years. However, the researchers acknowledge the cyclic nature of sage-
grouse populations and note that these populations have already been
both above and below this mark in previous years, which is part of that
natural cycling. Furthermore, model projections suggest that, both over
the near term (30 years) and the long term, the North Mono Lake and
South Mono Lake populations have a relative high probability of
maintaining between 50 and 500 breeding adults. Thus, in these two core
populations immediate genetic concerns (e.g., inbreeding depression)
are not apparent, but concern over maintaining long-term genetic and
demographic viability remains.
Coates et al. (2020, p. 41; Table 1) estimated 10-year extirpation
probability based on the number of runs of the IPM where populations
went to zero. Probabilities of extirpation ranged greatly for
individual PMUs and populations within the PMUs, with highest
extirpation probabilities in the Pine Nuts PMU (69.7 percent), the
White Mountains PMU (75.1 percent), and the Sagehen and Parker Meadows
populations of the South Mono PMU (74.8 and 64.3 percent, respectively)
(Coates et al. 2020, Table 1). The Bi-State DPS as a whole has a 1.1
percent extirpation probability in the next 10 years, and the Desert-
Creek Fales PMU (9.0 percent), the Bodie Hills PMU (2.4 percent), and
the South Mono PMU as a whole (3.8 percent), as well as its largest
population (Long Valley; 7.9 percent) all have low probabilities of
extirpation (Coates et al. 2020, Table 1). Some of these extirpation
probabilities are lower than those calculated by Garton et al. (2015),
likely because of differences in methods. The two studies also used
different data sets, with Garton et al. (2015) using reconstructed male
counts, and Coates et al. (2020) using multiple data sources for the
IPM, including demographic and lek count data.
Thus, even though some populations in this most recent model have
high probabilities of extirpation over the next ten years, the DPS as a
whole is likely to persist over this time period. These extinction
probabilities are created from continuing and forecasting past trends
into the future, and thus likely do not reflect the effects of
conservation measures started or completed in recent years.
Finally, the most recent population study included a PMU
distribution analysis to examine short-term changes in population
distribution across the Bi-State DPS. This analysis concluded that some
parts of the Bi-State DPS are contracting, with the greatest
contractions in acres of occupied habitat occurring in the Pine Nut,
Fales, Sagehen, and White Mountains populations (Coates et al. 2020, p.
51-54). However, distributional area in the Bodie Hills is increasing
(Coates et al. 2020, p. 54). As a whole, the Bi-State DPS showed some
evidence of range contraction between 2008 and 2018, though the 95
percent CRI overlapped zero ((-0.07 [-0.19, 0.07]) (Coates et al. 2020,
p. 51).
Following are brief accounts of each PMU.
(1) The Pine Nut PMU has the fewest sage-grouse (Median = 33; CRI =
0-73 individuals in 2018; Coates et al. 2020, p. 33) and the least
number of active leks of the Bi-State PMUs. The population in the Pine
Nut PMU has some level of connectivity with the Desert Creek-Fales PMU
and potentially also with the Bodie and Mount Grant PMUs. The most
significant impacts in this PMU are wildfire, invasive species,
woodland encroachment, urbanization, and infrastructure.
Historically, a single lek in the northern portion of the Pine Nut
Mountains (known as Mill Canyon Dry Lake) was the only known
consistently active lek in this PMU. From 2000 through 2013, the
average male attendance at the Mill Canyon Dry Lake lek was
approximately 14 males (Bi-State TAC 2012, p. 17). Since 2013, activity
on this lek has essentially ceased. An additional lek in the southern
extent of the Pine Nut mountain range has periodically been reported
but at this point is not considered active. Aerial surveys over the
past few years typically detect birds in this area but actual strutting
activity is uncertain. It is unclear if this southern lek has been
abandoned, or if the original documentation just captured a rare event
or simply misclassified random bird sightings for actual strutting
activity. Over the past several years, two newly discovered lek sites
in the Buckskin Range appear to be the only reliably active strutting
grounds in this PMU (NDOW 2018, unpublished data). Both lek sites are
small with two to five males apiece. The most recent results from the
IPM suggests population growth in this PMU has declined on average six
percent annually over the past decade (2008-2018; Median [lambda] =
0.835; CRI = 0.234-1.94; Coates et al. 2020, p. 41).
Ongoing conservation efforts in this PMU include an acquisition of
land containing high priority targets identified in the 2012 BSAP,
which will help limit the effects of urban and exurban development.
This 5,870 ha (14,500 ac) acquisition by the Carson City BLM has been
approved and is anticipated to finalize in the spring of 2020. Other
completed, ongoing, or planned conservation actions in the Pine Nut PMU
include pinyon-juniper removal, horse gathers, removal of nonnative
invasive plants, fuel reduction treatments, road closure, and fence
removal (Bi-State TAC 2019, entire).
(2) The Desert Creek-Fales PMU straddles the Nevada-California
border and contains two populations, one in each State. This PMU
includes two breeding complexes: Desert Creek (Nevada) and Fales
(California). The populations in the Desert Creek-Fales PMU have some
level of connectivity with the Pine Nut PMU and potentially also with
the Bodie and Mount Grant PMUs. The most significant impacts in this
PMU are wildfire, invasive species (specifically conifer encroachment),
infrastructure, and urbanization.
The NDOW uses data from six active leks to evaluate the trend and
to tally maximum male attendance in the Desert Creek breeding complex.
The long-term average male attendance is approximately 17.7 males per
lek (Bi-State TAC 2017, p. 8). This average is influenced by one of
these leks becoming inactive, with no males counted within the last 8
years. This lek might have moved locations, but this possibility
remains unconfirmed. In 2012, a previously undocumented lek was
discovered to the east of Nevada State Route 338 near Dalzell Canyon;
24

[[Page 18062]]

males were documented strutting on this lek. Over the last 7 years,
this lek has remained active but counts have been small (<5). Three
additional lek sites have also been discovered over the past 5 years.
The most recent results from the IPM suggest population growth in this
PMU has declined in the past decade. Estimated median population
abundance in 2018 was 325 (CRI = 163-542; Coates et al. 2020, p. 34)
individuals. Estimated median population growth from 2001 through 2018
was 0.939 (CRI = 0.348-1.499) and from 2008 through 2018 was 0.938 (CRI
= 0.337-1.535; Coates et al. 2020, p. 34).
The Fales breeding complex is located in northern Mono County,
California. It is composed of three active and three inactive leks. Two
active leks are located near Sonora Junction, in proximity to the
intersection of Highway 395 and California Highway 108, and one
additional lek is located in the northeast corner of Mono County in the
Sweetwater Mountains. No males have been documented on a previously
occupied lek since possible activity in 2012 (CDFW 2014a, unpublished
data; CDFW 2018, unpublished data). In 2018, peak male count on the two
remaining leks was at a historic low of 16 males total. One of the two
remaining leks may also potentially be affected by the recent Boot fire
(2018) and the construction of a new outbuilding approximately 200
meters (218 yards) away. The most recent results from the IPM suggest
population growth has been negative over the past decade, but evidence
of decline is less robust than in other breeding areas, especially when
considering the longer timeframes. Estimated median population
abundance in 2018 was 121 (CRI = 54-208; Coates et al. 2020, p. 34)
individuals. Estimated median lambda from 1995-2018 was 0.999 (CRI =
0.59-1.641), from 2001-2018 was 0.984 (CRI = 0.539-1.525), and from
2008-2018 was 0.965 (CRI = 0.544-1.397; Coates et al. 2020, p. 34).
Overall, the combined Desert Creek and Fales subpopulation has declined
4.5 percent annually over the past 18 years (Coates et al. 2020, Table
3).
Completed, ongoing, and planned conservation measures in this PMU
include pinyon-juniper removal, fence removal, road closures, livestock
management (to reduce impacts to critical brood-rearing habitat),
nonnative invasive plant removal, road closure, fence removal, and
post-fire restoration (Bi-State TAC 2019, entire).
(3) The Mount Grant PMU is composed of three connected areas: Two
high-elevation areas associated with Aurora Peak and the Wassuk Range
(centered on Mount Grant), and one low-elevation area called Ninemile
Flat (located in the East Fork Walker River valley) between the two
high-elevation areas. This PMU is also connected with the Bodie PMU (a
portion of the sage-grouse population in each PMU moves seasonally to
the other). Surveys in the Mount Grant PMU have been sporadic due to
difficulty accessing several locations and survey data collection has
been influenced by apparent confusion over lek names and potential
vagaries in lek locations. Woodland succession, and potentially to a
lesser extent historical and current mining activity, has most
negatively influenced bird distribution within the Mount Grant PMU (Bi-
State TAC 2012, pp. 36-37). More recently, recreational OHV use has
become a more prevalent activity under consideration for its influence
on birds (Service 2020, p. 27).
The largest known lek in the Mount Grant PMU is located near Aurora
Peak along the Nevada-California border, and it is generally considered
the eastern extension of the Bodie PMU breeding complex. The high count
of 94 males for this lek was recorded in 2006, with a low of 10 in
2013. Over the past 5 years, peak male counts have ranged between 14
and 41 individuals (NDOW 2018, unpublished data). Leks in the Wassuk
Range have not been surveyed consistently due to lack of access, which
requires aerial survey methods. In 2005 and 2006, a total of 19 and 33
males, respectively, were counted on five active leks in the Wassuk
Range (NDOW 2009, unpublished data; Bi-State TAC 2012, p. 35). During
2012, on four leks surrounding Mount Grant, researchers counted a total
of 139 birds (males and females) (BSLSP 2012, p. 13). In 2013,
researchers counted 38 males on 3 leks, the largest of which contained
30 males, and over the past 4 years, total male counts have ranged
between 8 and 35 across 3 to 5 leks, with the largest lek containing 23
males. However, these results are calculated from limited data due to
access limitations and survey method. The most recent results from the
IPM suggest population growth in this PMU has generally been stable
over the past decade, largely mirroring the pattern across the Bi-State
DPS overall. Estimated median population abundance in 2018 was 374 (CRI
= 205-619; Coates et al. 2020, p. 34) individuals. Estimated median
lambda from 2008 through 2018 was 0.989 (CRI = 0.551-1.536; Coates et
al. 2020, p. 34).
Completed, ongoing, and planned conservation measures in this PMU
include pinyon-juniper removal, sagebrush restoration, horse gathers
(roundup and removal of wild horses on public lands), road closures,
and fence removal (Bi-State TAC 2019, entire).
(4) The Bodie PMU contains one population (Bodie Hills), which is
one of the two core (largest) populations for the Bi-State DPS. Most of
the PMU is located to the east of Highway 395, but a small portion
extends west of Highway 395 to the Sierra Nevada Mountains. Loss of
historical sage-grouse range in the Bodie PMU has been most influenced
by woodland succession (The Nature Conservancy 2009, entire; Bi-State
TAC 2012, p. 30; USGS 2012, unpublished data). Significant stands of
pinyon pine and to a lesser extent juniper occur at mid to low
elevations on all flanks of the Bodie Hills as well as across the
Sierra Nevada Mountains side of the PMU. Perennial water and meadow
habitats in the Bodie PMU are generally privately owned and provide
important sage-grouse habitat during the brood-rearing/summer season.
While natural vegetation succession processes (woodland
establishment)--in the absence of disturbance--have resulted in loss of
sagebrush habitat that continues to fragment and isolate the population
within this PMU, the extent of habitat loss and fragmentation
attributable to land use change (urban development and agricultural
conversion) appears minimal.
Approximately eight leks have been regularly surveyed in the Bodie
PMU since the late 1980s with some locations being counted as far back
as the 1950s. Additional active leks and numerous satellite leks (sites
used sporadically in years of high sage-grouse abundance) have also
been identified in the Bodie PMU. The majority of leks are located in
the Bodie Hills east of Highway 395, but at least one long-term lek and
several associated satellite leks occur west of the Highway. Since
1953, the long-term average total male attendance in the Bodie PMU is
192 (Bi-State TAC 2017, p. 11). The minimum count recorded was 64 males
on 6 leks in 1998, and the maximum was 524 males on 14 leks in 2014.
The sage-grouse population in the Bodie PMU has no discernible
long-term trend (Garton et al. 2011, p. 324; referred to as the Mono
Lake population). The average number of males per active lek declined
by 41 percent between 1965 and 2007, but since 1991 the minimum number
of males counted has been trending upward (Garton et al. 2011, p. 324).
Recent survey years are encouraging because they demonstrate a
substantial increase in the peaks associated with the population
fluctuations. These increasing peaks, coupled with the

[[Page 18063]]

general increase in the number of males counted since the early 1990s,
suggests the Bodie PMU may be moving toward a cycle that oscillates at
generally higher numbers as compared to the other PMUs. The most recent
results from the IPM suggest growth in this population has remained
stable, with evidence of increase. Estimated median population
abundance in 2018 was 1,521 (CRI = 1,181-1,941; Coates et al. 2020, p.
34) individuals. Estimated median lambda from 1995 through 2018 was
1.07 (CRI = 0.76-1.758), from 2001 through 2018 was 1.029 (CRI = 0.74-
1.457), and from 2008 through 2018 was 1.061 (CRI = 0.783-1.471; Coates
et al. 2020, p. 34). Changes in population from 1995 through 2018
indicate that sage-grouse numbers as of 2018 were approximately four
times higher compared to the low point 24 years ago (Coates et al.
2020, p. 34).
Completed, ongoing, and planned conservation measures in this PMU
include pinyon-juniper removal; conservation easements; fence
modification and removal; road closure; post-fire rehabilitation; and
sagebrush and brood-rearing habitat restoration (Bi-State TAC 2019,
entire).
(5) The South Mono PMU comprises three generally discrete locations
or breeding complexes: Long Valley, Parker Meadow, and Granite
Mountain. In the South Mono PMU, sage-grouse were likely historically
distributed in many of the same areas utilized today (BSLPG 2004, p.
162), although there has been an estimated reduction in sagebrush
extent of approximately 13 percent (USGS 2012, unpublished data) due to
woodland succession. In addition, loss and fragmentation of habitat due
to other causes (infrastructure, wildfire, and water development) has
likely altered sage-grouse occurrence in certain locations such as the
Mono Basin and Adobe Valley. In Long Valley, there may be specific
locations where distribution has been reduced, but these areas appear
limited in extent and confined to peripheral locations within the
breeding complex. Changes in the sage-grouse population size in the
Parker Meadow and Granite Mountain portions of the PMU are unclear, but
likely greater. The Granite Mountain and Adobe Valley area (north of
Highway 120) contains an expanse of sagebrush habitat and has been
known to support birds during severe winters as well as historically
(USFS 1966, p. 4; BSLPG 2004, p. 161). However, no consistent use of
Adobe Valley is currently occurring, and use of the Granite Mountain
area is limited. This inconsistent use is presumed to be caused by the
general lack of water and meadow habitat in the area, which has likely
decreased in the past century. To the east of Adobe Valley in the
vicinity of Pizona Creek, a potential connectivity corridor exists
between populations in the South Mono and White Mountains PMUs.
However, the vegetation within this corridor has apparently changed due
to woodland succession, and an aerial survey suggests that current
vegetation is not suitable sage-grouse habitat (BSLSP 2012, p. 36).
Although surpassed by the Bodie PMU in 2012, traditionally the
South Mono PMU has had the highest estimated population size as
compared to the other PMUs within the range of the Bi-State DPS. The
Long Valley breeding complex includes at least 10 to 12 consistently
active leks and associated satellite sites located along the upper
Owens River drainage and the Crowley Lake Basin. The Granite Mountain
breeding complex includes two inactive leks located in the Adobe Valley
and two active leks located in the Sagehen Summit area. The Parker
Meadow breeding complex includes one consistently active lek site
located south of Parker Creek at the northwest end of the June Lake
Loop Road. Both the Granite Mountain and Parker Meadow breeding
complexes are small, with generally less than 10 strutting males per
complex documented per year.
Long Valley represents the largest population in the South Mono PMU
and, in conjunction with the Bodie PMU, these two PMUs represent the
core populations of the Bi-State DPS. Sage-grouse have been counted in
the Long Valley breeding complex since the early 1950s. Historical
maximum male attendance counts occurred in 1962, 1963, 1986, and 2012
when 408, 405, 406, and 418 male were counted, respectively, on 6-7
leks (Bi-State TAC 2012, p. 44). The long-term average peak male
attendance between 1953 and 2018 is approximately 200, counted on an
average of 9 leks. The high count during this period was 418 males in
2012, and the low count was 130 males in 2019 (CDFW 2019, unpublished
data). The population in Long Valley has demonstrated positive and
negative growth rates over the past 40 years (Garton et al. 2011, p.
329), although fluctuations have been relatively tempered and the
population trend appears generally stable based on these data. The most
recent results from the IPM suggest growth in this population has
declined on average approximately four percent annually over the past
decade, with more evidence of decrease than increase and apparently
deviating from the remainder of the DPS. Estimated median population
abundance in 2018 was 818 (CRI = 614-1,053; Coates et al. 2020, p. 35)
individuals. Estimated median lambda from 1995 through 2018 was 0.996
(CRI = 0.676-1.427), from 2001 through 2018 was 0.986 (CRI = 0.655-
1.433), and from 2008 through 2018 was 0.96 (CRI = 0.68-1.361; Coates
et al. 2020, p. 35).
Four leks are known to exist in the Granite Mountain breeding
complex (Adobe, Gaspipe, Big Sand Flat, and Sagehen Summit). Estimated
median population abundance in 2018 was 20 individuals (CRI = 0-75;
Coates et al. 2020, Table 1). Estimated median lambda from 1995 through
2018 was 0.916 (CRI = 0.282-1.964), from 2001 through 2018 was 0.844
(CRI = 0.18-1.819), and from 2008 through 2018 was 0.834 (CRI = 0.222-
1.658; Coates et al. 2020, Table 3). Sage-grouse have been known to
occur in the Parker Meadow breeding complex area since the 1950s,
although lek monitoring did not occur until 2002. One small lek is
active, and on occasion, satellite sites have experienced strutting
activity (CDFW 2012, unpublished data). Since 2002, a high count of 18
males occurred in 2018, and a low count of 3 males occurred in 2010
(Bi-State TAC 2012, p. 45; CDFW 2018, unpublished data). The most
recent results from the IPM suggest growth in this population is
generally stable. Estimated median population abundance in 2018 was 48
(CRI = 21-86; Coates et al. 2020, Table 1) individuals. Estimated
median lambda from 2001 through 2018 was 0.968 (CRI = 0.254-0.7.16),
and from 2008 through 2018 was 1.048 (CRI = 0.361-5.814; Coates et al.
2020, Table 3). While growth in this population has little influence on
the South Mono PMU as a whole, Parker Meadows likely facilitated
connectivity between the Bodie and South Mono PMUs historically and
potentially still does so today.
In 2017, an experimental translocation program was initiated to
bolster low numbers in the Parker Meadows population (Mathews et al.
2018, p. 7). Given its infancy, the efficacy of this program has not
yet been determined. However, the recent high male lek count in 2018
(which excluded translocated males) offers some optimism as
translocations in 2017 improved reproductive success and ultimately
recruitment in 2018.
Apart from the translocation, completed, ongoing, and planned
conservation measures in this PMU include pinyon-juniper removal, land
acquisition, road closures, landfill removal, and fence modification
and removal (Bi-State TAC 2019, entire).

[[Page 18064]]

(6) The White Mountains PMU is the southernmost PMU in the Bi-State
DPS, encompassing the White Mountains along the border of Nevada and
California. It extends from the Candelaria Hills and Truman Meadows
areas in the north to California Highway 168 in the south and from
California Highway 6 in the west to the Silver Peak Range, Nevada, in
the east. Historical and current distributions of sage-grouse in the
White Mountains are not well understood. The area is difficult to
access and, due to elevation, heavy snow conditions are typical during
the spring breeding season. In addition, the number, size, and activity
of leks in the White Mountains are not well known due to infrequent and
opportunistic surveys. Historical accounts in Esmeralda County, Nevada,
suggest bird densities there have likely always been low.
Current impacts such as exurban development (e.g., Chiatovich Creek
area (BSLSP 2012, p. 38)), grazing, recreation, and invasive species
may be influencing portions of the population and are likely to
increase in the future, but current impacts are considered minimal due
to the remote locations of most known sage-grouse use areas. Potential
future impacts from infrastructure (power lines, roads) and mineral
developments could lead to fragmentation of the remote, contiguous
nature of the habitat if conservation efforts were not conducted.
There are currently two active leks in the Nevada portion of the
White Mountains PMU. Both were discovered in 2012 and are relatively
small with between zero and nine males documented per lek per year
(NDOW 2018, unpublished data). Since 2016, no males have been detected
at one of these sites.
The most recent run of the IPM suggests more evidence of decline
than increase, although this estimate is derived from fairly limited
data. Estimated median population abundance in 2018 was 45 (CRI = 9-86;
Coates et al. 2020, p. Table 1) individuals. Estimated median lambda
from 2008 through 2018 was 0.85 (CRI = 0.343-1.957; Coates et al. 2020,
p. Table 3).
Completed, ongoing, and planned conservation measures in this PMU
include conservation easements and horse gathers (Bi-State TAC 2019,
entire).

Regulatory and Analytical Framework

Regulatory Framework

Section 4 of the Act (16 U.S.C. 1533) and its implementing
regulations (50 CFR part 424) set forth the procedures for determining
whether a species is an ``endangered species'' or a ``threatened
species.'' The Act defines an endangered species as a species that is
``in danger of extinction throughout all or a significant portion of
its range,'' and a threatened species as a species that is ``likely to
become an endangered species within the foreseeable future throughout
all or a significant portion of its range.'' The Act requires that we
determine whether any species is an ``endangered species'' or a
``threatened species'' because of any of the following factors:
(A) The present or threatened destruction, modification, or
curtailment of its habitat or range;
(B) Overutilization for commercial, recreational, scientific, or
educational purposes;
(C) Disease or predation;
(D) The inadequacy of existing regulatory mechanisms; or
(E) Other natural or manmade factors affecting its continued
existence.
These factors represent broad categories of natural or human-caused
actions or conditions that could have an effect on a species' continued
existence. In evaluating these actions and conditions, we look for
those that may have a negative effect on individuals of the species, as
well as other actions or conditions that may ameliorate any negative
effects or may have positive effects.
We use the term ``threat'' to refer in general to actions or
conditions that are known to or are reasonably likely to negatively
affect individuals of a species. The term ``threat'' includes actions
or conditions that have a direct impact on individuals (direct
impacts), as well as those that affect individuals through alteration
of their habitat or required resources (stressors). The term ``threat''
may encompass--either together or separately--the source of the action
or condition or the action or condition itself.
However, the mere identification of any threat(s) does not
necessarily mean that the species meets the statutory definition of an
``endangered species'' or a ``threatened species.'' In determining
whether a species meets either definition, we must evaluate all
identified threats by considering the expected response by the species,
and the effects of the threats--in light of those actions and
conditions that will ameliorate the threats--on an individual,
population, and species level. We evaluate each threat and its expected
effects on the species, then analyze the cumulative effect of all of
the threats on the species as a whole. We also consider the cumulative
effect of the threats in light of those actions and conditions that
will have positive effects on the species, such as any existing
regulatory mechanisms or conservation efforts. The Secretary determines
whether the species meets the definition of an ``endangered species''
or a ``threatened species'' only after conducting this cumulative
analysis and describing the expected effect on the species now and in
the foreseeable future.
Our proposed rule described ``foreseeable future'' as the extent to
which we can reasonably rely on predictions about the future in making
determinations about the future conservation status of the species. The
Service since codified its understanding of foreseeable future in 50
CFR 424.11(d) (84 FR 45020). In those regulations, we explain the term
``foreseeable future'' extends only so far into the future as the
Service can reasonably determine that both the future threats and the
species' responses to those threats are likely. The Service will
describe the foreseeable future on a case-by-case basis, using the best
available data and taking into account considerations such as the
species' life-history characteristics, threat-projection timeframes,
and environmental variability. The Service need not identify the
foreseeable future in terms of a specific period of time. These
regulations did not significantly modify the Service's interpretation;
rather they codified a framework that sets forth how the Service will
determine what constitutes the foreseeable future based on our long-
standing practice. Accordingly, though these regulations do not apply
to this determination for the Bi-State DPS of greater sage-grouse
because it was proposed prior to their effective date, they do not
change the Service's assessment of foreseeable future for the Bi-State
DPS of greater sage-grouse as contained in our proposed rule and in
this determination.

Analytical Framework

The Species Report documents the results of our comprehensive
biological status review for the species, including an assessment of
the potential threats to the species. The Species Report does not
represent a decision by the Service on whether the species should be
proposed for listing as an endangered or threatened species under the
Act. It does, however, provide the scientific basis that informs our
regulatory decisions, which involve the further application of
standards within the Act and its implementing regulations and policies.
The following is a summary of

[[Page 18065]]

the key results and conclusions from the Species Report; the full
report can be found at either Docket No. FWS-R8-ES-2018-0106 or Docket
No. FWS-R8-ES-2018-0107 on http://www.regulations.gov.
In this determination, we used the three conservation biology
principles of resiliency, redundancy, and representation to assess the
viability of the Bi-State DPS (Shaffer and Stein 2000, pp. 306-310).
Briefly, resiliency supports the ability of the species to withstand
environmental and demographic stochasticity (for example, wet or dry,
warm or cold years), redundancy supports the ability of the species to
withstand catastrophic events (for example, droughts, large pollution
events), and representation supports the ability of the species to
adapt over time to long-term changes in the environment (for example,
climate changes). In general, the more resilient and redundant a
species is and the more representation it has, the more likely it is to
sustain populations over time, even under changing environmental
conditions. Using these principles, we will consider the DPS' overall
response to threats and the DPS' viability as a whole.

Summary of Biological Status and Threats

In this discussion, we review the biological condition of the
species and its resources, the influence of those conditions on the
species' overall viability, and the risks to that viability. Following
are summary evaluations of 11 threats analyzed in the Species Report
for the Bi-State DPS: Urbanization and habitat conversion (Factor A);
infrastructure (Factor A); mining (Factor A); grazing and rangeland
management (Factor A); nonnative invasive plants and native woodland
succession (Factor A); wildfires and altered fire regime (Factor A);
climate change, including drought (Factor A); recreation (Factor E);
disease (Factor C); predation (Factor C); and small population size and
population isolation (Factor E). We also evaluate the inadequacy of
existing regulatory mechanisms (Factor D) on the magnitude of threats.
Please see the Species Report (Service 2020, pp. 39-136) for a more
detailed discussion of each threat.
In the Species Report, we also considered four additional threats:
Renewable energy (Factor A), commercial and recreational hunting
(Factor B); scientific and educational uses (Factor B); and
contaminants (including pesticides) (Factor E). We concluded that
though these threats are currently having some impact on individual
sage-grouse and their habitat, their overall effect now and into the
future is expected to be minimal. Therefore, we will not present
summary analyses of those threats in this document but will consider
them in our overall conclusions of impacts to the species. For full
descriptions of all these threats and how they impact the species,
please see the Species Report (Service 2020, pp. 63-124).
For the purposes of this assessment, we consider the foreseeable
future to be the amount of time on which we can reasonably determine a
likely threat's anticipated trajectory and the anticipated response of
the species to those threats. For some threats impacting the Bi-State
DPS, we consider the time for which we can reliably project threats and
the anticipated response to be 30 years. This time period represents
our best professional judgment of the foreseeable future conditions
related to climate change, native woodland succession, nonnative
invasive plants, and wildfire cycles, as well as the Bi-State DPS
population cycles, probability of population persistence analyzed and
described by Garton et al. (2015, entire), and regeneration time of
sagebrush habitat. For other threats and the anticipated species
response, we can reliably project impacts and the species response for
less than 30 years, such as infrastructure, urbanization and habitat
conversion, grazing and rangeland management, recreation, disease, and
predation.

Urbanization and Habitat Conversion

Urbanization and habitat conversion (Factor A) have both direct and
indirect effects on sagebrush habitat. In this section, we will discuss
direct impacts to sagebrush habitat and to sage grouse populations.
Indirect effects (such as those associated with infrastructure,
increases in invasive plant species, and increases in domestic animals
and wildlife predator species) will be addressed in later sections.
Traditional land use in the Bi-State area was primarily farming and
ranching operations. These operations can have both beneficial and
detrimental effects on sage-grouse conservation. Continuing farming and
ranching operations have limited development of exurban subdivisions in
the Bi-State area, but they have also affected the extent of remaining
sagebrush through conversion to alternate vegetation types (such as
pasture grass) (Service 2020, p. 35). The extent of impacts from the
conversion of habitat depends on the amount of sagebrush lost, the type
of seasonal habitat affected, and the arrangement of habitat lost
(large blocks or small patches) (Knick et al. 2011, pp. 208-211).
While conversion of sagebrush vegetation communities to
agricultural land continues to occur in the Bi-State area, the rate of
this conversion remains difficult to quantify. Some reports state that
conversion has lessened and that some of these lands are instead being
sold and converted to low-density residential housing developments (Bi-
State TAC 2012, pp. 18, 24, 41). Several studies have demonstrated that
these increases in human population density could have strong effects
on sage-grouse occupancy beyond the areas directly converted to human
development. Sage-grouse extirpation was more likely in areas having a
human population density of at least four people per 1 km\2\ (10 people
per 1 mi\2\) (Aldridge et al. 2008, pp. 991-992). Increase in human
populations from this moderate level did not infer a greater likelihood
of extirpation, likely because much of the additional growth occurred
in areas no longer suitable for sage-grouse (Aldridge et al. 2008, pp.
991-992). Additionally, human density is 26 times greater in extirpated
sage-grouse areas than in the currently occupied range (Wisdom et al.
2011, p. 463). In modeling several measures of human population on
greater sage-grouse persistence, including current population density,
historical population density, and human population growth, the best
predictor of sage-grouse extirpation was human population density in
1950 (Aldridge et al. 2008, p. 985). This finding suggests that human
development has had long-term impacts on habitat suitability and sage-
grouse persistence (Aldridge et al. 2008, pp. 991-992). Thus, even
small increases in human population density can have a strong effect on
sage-grouse populations.
Another indicator of human development pressure on sage-grouse can
be inferred from existing sagebrush availability. To persist in an
area, sage-grouse require a minimum of 25 percent sagebrush; a high
probability of persistence required 65 percent sagebrush or more
(Aldridge et al. 2008, p. 990; and Chambers et al. 2014, p. 12). When
data were analyzed in 2014 across the Bi-State, no leks contained less
than 25 percent sagebrush cover in the immediate area. However, 30 out
of the 55 leks (55 percent) contained between 25 and 65 percent
sagebrush cover, suggesting an intermediate probability of persistence
(Chambers et al. 2014, p. 12). The remaining 25 leks (45 percent)

[[Page 18066]]

contained greater than 65 percent sagebrush cover surrounding a lek
site.
Historical and recent alterations, as well as ongoing conversion of
sagebrush vegetation to support ranching operations and urban/exurban
expansion, poses the greatest risk to persistence of sage-grouse in the
Pine Nut, Desert Creek-Fales, and South Mono PMUs and to a lesser
degree in the Bodie, and White Mountains PMUs (BSLPG 2004, pp. 24-169;
Bi-State TAC 2012, pp. 18-46). Approximately 11 percent of suitable
sage-grouse habitat in the Bi-State area occurs on private lands. In
each PMU, sage-grouse home ranges include private lands that are
critical to fulfilling annual habitat needs (Casazza 2009, p. 9),
including a significant proportion of mesic areas (e.g., upland
meadows) within the range of the Bi-State DPS needed by sage-grouse
during the late brood-rearing period. Sage-grouse are known to display
strong site fidelity to traditional seasonal habitats, and loss or
degradation of specific sites (especially brood-rearing habitat) can
have negative population impacts.
The majority of local agency land in the South Mono PMU is owned by
the City of Los Angeles and managed by the Los Angeles Department of
Water and Power (LADWP). Many of these parcels are irrigated pasture,
which provide important brood-rearing habitat to upwards 40 percent of
the entire Bi-State DPS population. The LADWP is considering altering
the extent to which these lands are irrigated. If realized, this
potential additive stressor has the potential to negatively affect
brood-rearing success (an influential demographic vital rate), given
that the Long Valley population has demonstrated slightly negative
population growth on average over the past 10 years. To address this
concern, in 2019 LADWP provided a letter to the Service that reaffirms
its prior commitment to allocate a sufficient amount of water to
maintain sage-grouse habitat in Long Valley. Determining the amount of
water needed to achieve this commitment will be informed by a
collaborative, science-based approach (LADWP 2019, in litt.). The goal
of LADWP's natural resource management is to employ Best Management
Practices for land and water uses that maintain water supplies to the
City of Los Angeles while protecting water quality, habitat,
biodiversity, as well as species recognized under the ESA throughout
the related watersheds. In 2014 (August 18, 2014), LADWP and their
governing Board of Water and Power Commission approved a Conservation
Strategy for the Bi-State DPS on their lands in Mono County,
California. A component of this Strategy included commitments to
maintain sage-grouse lekking, nesting, and brood rearing habitat.
Consistent with this Strategy, LADWP has consistently managed the
activities on their lands such as habitat restoration, livestock
grazing, recreation, control of noxious and invasive weeds, fire
suppression, infrastructure, and management of water in a manner that
is compatible with the conservation of the Bi-State DPS. These past
efforts and ongoing commitments will continue to provide benefits to
conservation of the species. The remainder of private lands in the
South Mono PMU is rangeland, although potential for commercial,
residential, or recreational development exists.
Ongoing efforts to develop fee acquisition of properties or enroll
them into conservation easements may help ameliorate current and
anticipated effects of urbanization and habitat conversion. We estimate
that approximately 10,415 ha (25,737 ac) of private land, which may
provide suitable habitat for sage-grouse in the Bi-State DPS, are
currently enrolled in various easement programs. The easements are
targeted primarily at development and water rights and vary in length
from 30 years to in perpetuity; thus, they can ameliorate the threat of
development but do not necessarily ensure that habitat remains
suitable. The majority of these easement lands are located in the Bodie
PMU, with the remainder of easements occurring in the Desert Creek-
Fales, South Mono, Pine Nut, and White Mountains PMUs. Of the
approximately 60,326 ha (149,071 ac) of private land that may provide
suitable habitat for sage-grouse within the Bi-State area,
approximately 17 percent is under easements. An additional approximate
9,045 ha (22,352 ac) of previously private land within the Bi-State DPS
has been acquired by State and Federal agencies over the past decade.
In total, approximately 19,460 ha (48,089 ac) of land, either through
conservation easements or acquisitions, has been substantially
protected from urbanization challenges. These acres represent
approximately 31 percent of total private lands containing suitable
sage-grouse habitat across the Bi-State area. In addition,
approximately 7,280 ha (18,000 ac) of lands identified as important by
the 2012 BSAP have funding obligated and are working through the
easement development process, with many of these efforts anticipated to
be completed in a few years. An effort to acquire approximately 5,867
ha (14,500 ac) of additional lands in the Pine Nut PMU by the Carson
City BLM has been approved but will likely not finalize until sometime
in 2020. Combining the realized and reasonably anticipated efforts,
approximately 57 percent of high-priority private lands in the Bi-State
area will be protected.
Currently, 89 percent of the Bi-State DPS is Federal lands. On
Federal lands, existing regulatory mechanisms protect sagebrush habitat
from development. Approximately 54 percent of all lands within the
sage-grouse Bi-State area is BLM-administered land; this includes
approximately 1 million ha (2.5 million ac). The Federal Land Policy
and Management Act of 1976 (43 U.S.C. 1701 et seq.) is the primary
Federal law governing most land uses on BLM lands, and directs
development and implementation of resource management plans (RMPs) that
direct management at a local level. The sage-grouse is designated as a
sensitive species on BLM lands in the Bi-State area (Sell 2010, pers.
comm.). The BLM's objectives for sensitive species is two-fold: (1) To
conserve and recover ESA-listed species and the ecosystem on which they
depend so that ESA protections are no longer needed, and (2) to
initiate proactive conservation measures that reduce or eliminate
threats to species to minimize the likelihood of and need for listing
of these species under the ESA (BLM 2008, p. 3).
The USFS manages approximately 35 percent of the land in the Bi-
State area or approximately 600,000 ha (1.5 million ac). Management of
activities on national forest system lands is guided principally by the
National Forest Management Act (NFMA). The NFMA specifies that the USFS
must have a land resource management plan (LRMP) (16 U.S.C. 1600) to
guide and set standards for natural resource management activities on
each National Forest or National Grassland. The greater sage-grouse is
designated as a USFS Sensitive Species in the Intermountain (R4) and
Pacific Southwest (R5) Regions, which includes the Humboldt-Toiyabe
National Forest (Bridgeport and Carson Ranger Districts) and the Inyo
National Forest in the Bi-State area. Designated sensitive species
require special consideration during land use planning and activity
implementation to ensure the viability of the species on USFS lands and
to preclude any population declines that could lead to a Federal
listing (USFS 2008, p. 21). In addition, sensitive species designations
require analysis for any activity that could have an adverse impact to
the species, including analysis

[[Page 18067]]

of the significance of any adverse impacts on the species, its habitat,
and overall population viability (USFS 2008, p. 21). The specific
protection that sensitive species status confers to sage-grouse on USFS
lands is largely dependent on LRMPs and site-specific project analysis
and implementation.
These regulatory mechanisms prevent urban development on Federal
lands. Through NFMA, LRMPs, Federal Land Policy and Management Act,
RMPs, and the On-Shore Oil and Gas Leasing Reform Act (1987;
implementing regulations at 36 CFR part 228, subpart E), land-managing
agencies have the authority to manage, prevent, restrict, or attach
protective measures to mineral extraction, wind development, and other
energy permits on Federal lands. Thus, some habitat loss due to these
developments may still occur on Federal land. Despite this, regulatory
mechanisms in place are overall reducing the magnitude of threats
associated with urbanization and habitat conversion.
Historical and recent conversion of sagebrush habitat on private
lands for agriculture, housing, and associated infrastructure within
the Bi-State area has likely negatively affected sage-grouse
distribution and population extent in the Bi-State DPS, thus
potentially influencing current and future recovery opportunities in
the Bi-State area. These alterations to habitat have been most
pronounced in the Pine Nut and Desert Creek-Fales PMUs and to a lesser
extent in the Bodie, South Mono, and White Mountains PMUs. Although
only a subset of the 11 percent of suitable sage-grouse habitat that
occurs on private lands could potentially be developed, conservation
actions on adjacent public lands could be compromised due to the
significant percentage of late brood-rearing habitat that occurs on the
private lands. Furthermore, the influence of land development and
habitat conversion on the population dynamics of sage-grouse is greater
than a simple measure of spatial extent because of the indirect effects
from the associated increases in human activity. These threats are not
universal across the Bi-State area, but localized areas of impacts have
been realized and additional future impacts are anticipated. Currently,
approximately 31 percent of total private lands containing suitable
sage-grouse habitat across the Bi-State area are enrolled under an
easement program or have been acquired by Federal and State agencies,
and this number will increase to 57 percent when combining additional
efforts that are ongoing and reasonably likely to occur.
Urbanization was not considered a significant threat at the time of
the 2013 proposed listing rule. Currently, the effects of urbanization
are having a minimal impact on the resiliency of populations within the
Bi-State DPS. Absent any protections or conservation measures, the
magnitude of impacts could increase into the foreseeable future as
unprotected private lands become further fragmented. However, due to
protections associated with regulatory mechanisms, and in particular
because of efforts to acquire important private lands associated with
the BSAP, we conclude that the magnitude of effects associated with
this threat and its potential impacts on population resiliency should
not increase to a detrimental level.
The BSAP (Bi-State TAC 2012, entire) includes measures to counter
effects such as urbanization and habitat loss. Because we have
determined that the partially completed and future conservation
measures/efforts will be implemented and effective (see Policy for
Evaluation of Conservation Efforts When Making Listing Decisions,
above), we believe that urbanization and human disturbance is not a
significant impact on the species within the foreseeable future.

Infrastructure

We characterize infrastructure as features that assist or are
required for human development or an associated action. We focus on
five infrastructure features that are apparent in the Bi-State area and
that have been implicated in impacting sage-grouse: Three linear
features (roads, power lines, and fences) and two site-specific
features (landfills and communication towers).
Infrastructure can have direct impacts on sage-grouse, such as
mortality through collision with power lines or fences, or direct
impacts on sagebrush, such as habitat fragmentation or habitat loss.
Fragmentation of sagebrush habitat has been cited as a primary cause of
the decline of sage-grouse populations because the species requires
large expanses of contiguous sagebrush (Service 2020, p. 45).
Estimating the impact of habitat fragmentation caused by infrastructure
on sage-grouse is complicated by the nonrandom placement of these
features and by time lags in species response to habitat changes
(Garton et al. 2011, p. 371), particularly since these relatively long-
lived birds continue to return to altered breeding areas (leks, nesting
areas, and early brood-rearing areas).
Roads are a linear feature on the landscape that can contribute to
habitat loss and avoidance of areas close to roads, create barriers to
migration corridors or seasonal habitats, and increase human
disturbance in remote areas (Service 2020, p. 46). Additionally, roads
can provide corridors for predators to move into previously unoccupied
areas. For some mammalian and avian species (such as common ravens
(Corvus corax)), dispersal along roads and other linear features like
power lines has greatly increased their distribution (Forman and
Alexander 1998, p. 212; Knight and Kawashima 1993, p. 268; Forman 2000,
p. 33; Connelly et al. 2004, p. 12-3). Road networks also contribute to
the spread of nonnative invasive plants via introduced road fill,
vehicle transport, and road maintenance activities (Forman and
Alexander 1998, p. 210; Forman 2000, p. 32; Gelbard and Belnap 2003, p.
426; Knick et al. 2003, p. 619; Connelly et al. 2004, p. 7-25). Direct
mortality of sage-grouse from vehicle collisions does occur (Patterson
1952, p. 81; Wiechman and Reese 2008, p. 3), but mortalities are
typically not monitored or recorded. Additionally, roads can have
impacts on sage-grouse behavior. For example, roads within 7.5 km (4.7
mi) of leks negatively influence male lek attendance (Service 2020, pp.
46-47). The mechanism by which road presence reduces male lek
attendance is not entirely clear, but chronic noise may contribute to
these decreases. Male sage-grouse rely on acoustical signals to attract
females to leks (Gibson and Bradbury 1985, p. 82; Gratson 1993, p.
692). Therefore, if noise interferes with mating displays, and thereby
female attendance, younger males will not be drawn to the lek and
eventually leks could become inactive (Amstrup and Phillips 1977, p.
26; Braun 1986, pp. 229-230).
In general, locations associated with mineral development (Mount
Grant PMU), recreational activity (Bodie and South Mono PMUs), and
major travel corridors (Desert Creek-Fales PMU) have the most
significant daily road traffic. Our analysis of the best available data
in the Bi-State area documents that 54 out of 55 known active or
pending leks are within 3 km (1.8 mi) or less of an existing minor road
(such as dirt two-track roads). Furthermore, of the 55 known active or
pending leks, 64 percent (n=35) are within 5 km (3.1 mi) of paved
secondary highways (Service 2013c, unpublished data).
An extensive network of roads and trails currently occurs
throughout the range of the Bi-State DPS. In the Bi-State area, all
Federal lands have restrictions limiting off-road vehicular travel. In
addition, road closures and

[[Page 18068]]

rehabilitation of redundant roads by USFS and BLM are occurring to
benefit Bi-State DPS conservation (Service 2020, p. 49).
We anticipate limited additional road and trail development will
occur within suitable and potentially suitable habitat in the Bi-State
area based on recent land use plan amendments, USFS and BLM travel
management plans, and our current understanding of travel management
direction. However, because an extensive road and trail network already
occurs throughout the Bi-State area and because roads are known to
result in both direct and indirect impacts to sage-grouse, we
anticipate some impacts to birds and leks in the future, although we
are uncertain to what degree these potential impacts will affect
populations in the Bi-State area.
Power lines can directly affect sage-grouse by posing collision and
electrocution hazards (Braun 1998, pp. 145-146; Connelly et al. 2000a,
p. 974). They can have indirect effects by decreasing lek recruitment,
increasing predator presence, facilitating the invasion of nonnative
invasive annual plants by creating soil conditions favorable to their
spread, potentially acting as a barrier to movement, and ultimately
negatively affecting population performance (Service 2020, pp. 50-52).
Due to the potential spread of invasive species and facilitation of
predator occurrence as a result of power line construction, the
indirect influence power lines can have on vegetation community
dynamics and species occurrence often extends out further than the
physical footprint (Knick et al. 2011, p. 219). Recent research has
demonstrated that power lines are influencing sage-grouse behavior,
demographic vital rates, and population growth rates due to associated
impacts from raven abundance and predation (Gibson et al. 2018, p. 17).
Power lines occur in all Bi-State PMUs, but the extent of exposure
varies by location. Based on available data (generally restricted to
transmission lines), we estimate approximately 210 km (130 mi) of
existing power lines are present across suitable habitat in the Bi-
State. Overall, approximately 21 percent of 55 active and pending leks
in the Bi-State area are within 2 km (1.2 mi) or less of existing
transmission lines and approximately 38 percent of active and pending
leks are within 5 km (3.1 mi) or less of existing transmission lines
(Service 2013c, unpublished data). This suggests a potential loss, due
to sage-grouse avoidance, of approximately 25,200 ha (62,270 ac) of
otherwise suitable habitat (Gillan et al. 2013, p. 307). These
transmission lines have the potential to further negatively influence
over 250,000 ha (617,700 ac) or approximately 47 percent of suitable
habitat, assuming their presence leads to the increased presence of
ravens and other predators (Gibson et al. 2018, p. 17). Given that the
predator community population size likely fluctuates through time, the
scale of this potential impact will likely vary. Therefore, we are
uncertain to what degree these potential impacts will affect
populations in the Bi-State area. Of ongoing concern, however, is the
potential time lag in effects from construction of power lines, as
ravens and other predators may not utilize those lines until several
years after their construction.
We anticipate that while existing power lines will persist on the
landscape in the future, new power lines will be limited to smaller
distribution lines associated with expansion of urbanization on a
portion of the private lands within and around the Bi-State area. Bi-
State habitat is currently managed as a right-of-way avoidance area by
Federal land managers, such that larger lines (>120 kilovolts) and
associated facilities will not be authorized (outside of existing
corridors; BLM 2016, p. 15; HTNF 2016, p. 13). In the Bodie PMU, one
decommissioned power line has been removed (Bi-State TAC 2018).
Fences are used to delineate property boundaries and for livestock
management (Braun 1998, p. 145; Connelly et al. 2000a, p. 974). The
effects of fencing on sage-grouse include direct mortality through
collisions, creation of predator perch sites, and habitat fragmentation
(Service 2020, p. 55). Fences present a risk to sage-grouse in all Bi-
State PMUs (BSLPG 2004, pp. 54, 80, 120, 124, 169) due to known fence
collisions and their potential to degrade habitat quality.
Not all fences present the same direct mortality collision risk to
sage-grouse. Collision risk factors include fencing design, landscape
topography, and spatial relationship with seasonal habitats
(Christiansen 2009, p. 2). Management methods can decrease the impact
of fences on sage-grouse. Visual markers have been employed in some of
the high-risk areas to make fences more readily seen by birds; this
method does appear to substantially reduce mortality due to collisions.
Markers have been installed on a total of approximately 101 km (63 mi)
of fence across the Bi-State DPS since 2012. Recent land use plan
amendments encourage evaluation of existing fences with respect to
sage-grouse conservation and discourage new installations that may
negatively affect sage-grouse and its habitat (BLM 2016, pp. 12, 15;
HTNF 2016, p. 14).
Data on the total extent (length and distribution) of existing
fences and new fence construction projects are not available for the
Bi-State area. However, based on data contained within the Greater
Sage-grouse Bi-State Distinct Population Segment Forest Plan Amendment
(USFS and BLM 2014, p. 99), there is likely on the order of 650 km (400
mi) of existing fences across the entire DPS. While we expect fencing
to continue and possibly expand in the future within every PMU in the
Bi-State area, efforts associated with conservation and regulatory
mechanisms are currently ongoing (and expected to continue into the
future) to ameliorate some of their impacts (Bi-State TAC 2012, p. 5;
BLM 2016, pp. 12, 15; HTNF 2016, p. 14). While direct mortality through
collision may be minimized by these approaches, indirect impacts caused
by predation and other forms of habitat degradation may remain. The
overall severity of these impacts to the Bi-State DPS throughout its
range is not known, but based on the best available data the impacts
are widespread but minor.
Millions of birds are killed annually in the United States through
collisions with communication towers (including cellular towers) and
their associated structures (e.g., guy wires, lights) (Shire et al.
2000, p. 5; Manville 2002, p. 10), although most documented mortalities
are of migratory songbirds. In a comparison of sage-grouse locations in
extirpated areas of their range (as determined by museum species and
historical observations) and currently occupied habitats, proximity to
cellular towers had a strong correlation with likelihood of
extirpation, and the distance to cellular towers was nearly twice as
far from grouse locations in currently occupied habitats than
extirpated areas (Wisdom et al. 2011, p. 463). However, there was no
information as to whether the towers were a factor in the extirpation
of those areas, or if their presence was linked to other threats in
those areas (Wisdom et al. 2011, p. 467).
Within the range of the Bi-State DPS, approximately eight
communication towers have been constructed in the past decade (Federal
Communications Commission (FCC) 2018, unpublished data); each PMU has
at least one such facility located within occupied sage-grouse habitat.
These eight sites are likely an underrepresentation of the actual
number of tower sites within the Bi-State area, as tower facilities
shorter than 61 m (199 ft.) above ground level are not required to
register with the FCC

[[Page 18069]]

(FCC 2018, unpublished data). We are unable to determine if any sage-
grouse mortalities have occurred as a result of collisions with
registered or unregistered communication towers or their supporting
structures, as most towers are not monitored, and those that are
monitored lie outside the range of the species (Kerlinger 2000, p. 2;
Shire et al. 2000 p. 19).
Based on regulatory mechanisms associated with existing land use
plans as well as existing land designations (wilderness and wilderness
study areas), which significantly restrict new communication site
development, we do not expect many new facilities on federally managed
land in the Bi-State area (BLM 1993, p. 18; BLM 2016, p. 13; HTNF 2016,
pp. 42-43). However, we anticipate that existing communication towers
will remain in place and potentially new communication towers will be
added at existing tower sites. Typically, rights-of-way grants afforded
these facilities are for 30 years, and would likely be renewed
indefinitely. It is also probable that new communication towers will be
developed on non-federally managed lands along existing Federal
Highways and State Routes. Thus, future communication tower placements
will most likely affect the Desert Creek-Fales and South Mono PMUs,
potentially affecting sage-grouse habitat in those locations.
Municipal solid waste landfills and associated roads contribute to
increases in synanthropic predators (predator species adapted to
conditions created or modified by people) (Knight et al. 1993, p. 470;
Restani et al. 2001, p. 403; Webb et al. 2004, p. 523). One landfill
exists in the Bi-State area. The Benton Crossing Landfill in Mono
County is located north of Crowley Lake in Long Valley on a site leased
from the LADWP. Common ravens and California gulls (Larus californicus)
heavily use the landfill (Coates 2008, pers. comm.; USGS 2017, p. 17).
Sage-grouse nest success in Long Valley (South Mono PMU) was lower than
in other PMUs within the Bi-State area (Kolada et al. 2009b, p. 1344),
which may be attributable to increased avian predators subsidized by
landfill operations (Casazza 2008, pers. comm.; USGS 2017, p. 74;
Coates et al.. 2018, p. 256). At this time, the future closing of the
landfill appears probable, as LADWP has stated that they do not intend
to renew the lease and Mono County has been funding planning studies
for relocation, but any action on relocation is unlikely before the
lease expires in 2023.
In the Bi-State area, linear infrastructure impacts each PMU both
directly and indirectly to varying degrees. Existing roads, power
lines, and fences may degrade sage-grouse habitat and contribute to
direct mortality through collisions. In addition, roads, power lines,
and fences influence sage-grouse use of otherwise suitable habitats
adjacent to current active areas, increase predators, and increase
invasive plants. The impact caused by these indirect effects extends
beyond the immediate timeframe associated with the infrastructure
installation. Across the entire range of the greater sage-grouse, the
mean distance to highways and transmission lines for extirpated
populations was approximately 5 km (3.1 mi) or less (Wisdom et al.
2011, p. 463). In the Bi-State area, 64 percent of active or pending
leks are within 5 km (3.1 mi) of highways, and approximately 38 percent
are within this distance to existing transmission lines (Service 2013c,
unpublished data). The similarity apparent between these Bi-State DPS
lek locations and extirpated greater sage-grouse populations suggests
that persistence may be influenced by their juxtaposition with these
anthropogenic features.
The geographic extent, density, type, and frequency of linear
infrastructure disturbance in the Bi-State area have changed over time.
While new development of some of these features (highways) will likely
not occur, other infrastructure features have the potential of
increasing (secondary roads, power lines, fencing, and communication
towers). Furthermore, while development of new highways is unlikely,
road improvements are possible and traffic volume will likely increase,
and in certain areas these actions may be more important than road
development itself.
We concluded in the 2013 proposed listing rule that infrastructure
impacts (particularly fencing, power lines, and roads) were a
significant factor for proposing to list the DPS as a threatened
species, and today, we affirm that impacts from infrastructure occur in
various forms throughout the Bi-State DPS's range and are an ongoing
threat impacting population resiliency across its range and degrading
habitat both currently and into the future. This conclusion is based on
a variety of range-wide impacts that are currently occurring and
expected to continue or increase in the future that result in habitat
fragmentation; limitations for sage-grouse recovery actions due to an
extensive road network, power lines, and fencing; and a variety of
direct and indirect impacts such as direct loss of individuals from
collisions or structures that promote increased potential for
predation. Collectively, these threats may result in perturbations that
influence both demographic vital rates of sage-grouse (e.g.,
reproductive success and adult sage-grouse survival) and habitat
suitability in the Bi-State area.
Importantly, conservation efforts that address infrastructure
impacts have continued to be implemented since publication of the
proposed listing rule, including (but not limited to): Removing power
lines; implementing both permanent and seasonal road closures; removing
racetrack fencing; and the likely relocation of the landfill in Long
Valley. With continued implementation of conservation actions
associated with the BSAP (Bi-State TAC 2012, entire), infrastructure-
related impacts are significantly reduced.
The BSAP (Bi-State TAC 2012, entire) includes measures to counter
negative effects from infrastructure. Because we have determined that
the partially completed and future conservation efforts will be
implemented and effective (see Policy for Evaluation of Conservation
Efforts When Making Listing Decisions, below), we believe that effects
associated with infrastructure may no longer be considered a
significant impact into the future.

Mining

Surface and subsurface mining for mineral resources (gold, silver,
aggregate, and others) can result in direct loss of sagebrush habitat.
Construction of mining infrastructure can result in additional direct
loss of habitat from establishment of structures, staging areas, roads,
railroad tracks, and power lines. Sage-grouse and their nests could be
directly affected by crushing or vehicle collision. Sage-grouse also
can be impacted indirectly from an increase in human presence, land use
practices, ground shock, noise, dust, reduced air quality, degradation
of water quality and quantity, and changes in vegetation and topography
(Moore and Mills 1977, entire). However, whereas theoretical effects
are relatively clear and logical, information relating sage-grouse
response to mineral developments is not extensive.
Mineral development is classified as leasable (fluid) minerals (in
the Bi-State area, this is limited to geothermal resource), saleable
minerals (sand and gravel pits), and locatable minerals (precious
metals). Through existing regulatory mechanisms, Federal managers have
discretion to condition or deny proponents of leasable or saleable
mineral projects, and existing

[[Page 18070]]

land use management plans have provisions that significantly restrict
the likelihood of these developments (BLM 1993, p. 18; BLM 2016, pp.
12-13; HTNF 2016, pp. 19-21). Locatable minerals are administered under
the General Mining Act of 1872. Federal land managers have very limited
ability to prevent or preclude these activities from occurring.
Mineral extraction has a long history throughout the Bi-State area.
Mining continues today to a limited extent in all PMUs and is expected
to continue into the future. Although mining occurs year-round in the
Bi-State DPS, direct loss of key seasonal habitats or population
disturbances during critical seasonal periods are of greatest impact.
Currently, the PMUs with the greatest exposure are Bodie, Mount Grant,
Pine Nut, and to a lesser degree South Mono (BSLPG 2004, pp. 89, 137,
178). There are currently several active Plans of Operations that
overlap Bi-State sage-grouse habitat and thousands of active mining
claims on Federal, State, and private lands. There is potential for
additional mineral developments to occur in the Bi-State area in the
future. While all PMUs have the potential for mineral development,
based on current land designations and past activity, it appears the
Pine Nut and Mount Grant PMUs are most likely to experience new
activity (Service 2020, pp. 61-63). Currently operational mines are not
within the core population areas of the Bi-State DPS, although existing
inactive mining sites, exploration actions, and potential future
developments could impact important lek complexes and population
connectivity.
In general, potential exists for mining operations to expand both
currently and into the future, but the scope of impacts from existing
mining expansion is not considered extensive. We concluded in the 2013
proposed listing rule and reaffirm here that, by itself, mining is not
currently considered a significant impact to the Bi-State population,
though mining exploration continues, and mining activity could occur at
any time in the future.
Conservation efforts that address the impacts from mining have
continued to be implemented since publication of the proposed listing
rule, such as reducing human-related disturbances (e.g., road noise/
traffic). The BSAP includes conservation actions targeting development
and human disturbances that will reduce the minor or potential impacts
from mining (Bi-State TAC 2012, entire). Because we have determined
that the partially completed and future conservation efforts will be
implemented and effective (see Policy for Evaluation of Conservation
Efforts When Making Listing Decisions, below), we believe impacts
associated with mining in the Bi-State population area are not a
reasonably anticipated concern into the future.

Grazing and Rangeland Management

Livestock grazing continues to be the most widespread land use
across the sagebrush biome (Connelly et al. 2004, p. 7-29; Knick et al.
2003, p. 616; Knick et al. 2011, p. 219), including within the Bi-State
area. Links between grazing practices and population levels of sage-
grouse are still not well defined (Braun 1987, p. 137; Connelly and
Braun 1997, p. 231). Depending on timing and intensity, grazing can
have both positive and negative impacts to greater sage-grouse
populations. Sage-grouse populations responded favorably to higher
grazing levels after peak vegetative productivity, but declined when
grazed earlier (Monroe et al. 2017, p. 1102). Livestock grazing can
reduce the available food sources needed during breeding and brood-
rearing periods (Braun 1987, p. 137; Dobkin 1995, p. 18; Connelly and
Braun 1997, p. 231; Beck and Mitchell 2000, pp. 998-1000). But while
some studies have reported grass height as important for sage-grouse
nesting habitat, others have reported weak or no effects, and other
studies concluded no influential effects of grass-related variables on
nesting success (Service 2020, pp. 65-66). In the Bi-State area,
studies have suggested that grazing, or more importantly maintenance of
residual grass cover, may not influence nest success in the Bi-State
area as much as in other regions (Kolada et al. 2009b, pp. 1343-1344;
Coates et al. 2017a, p. 55). This may be because the most prevalent
nest predator in the Bi-State area, the common raven, is potentially
less influenced by grass cover than mammalian predators (Coates et al.
2008, entire). Studies suggest that a threshold may exist whereby
grazing can occur without detriment to sage-grouse resources. We note,
however, the specifics of this threshold remain uncertain (Service
2020, p. 66).
Potential negative effects of livestock grazing on the sagebrush
ecosystem include reduced water infiltration rates, reduced cover of
herbaceous plants and litter, compacted soils, and increased soil
erosion (Braun 1998, p. 147; Dobkin et al. 1998, p. 213). These impacts
change the proportions of shrubs, grasses, and forbs in affected areas,
and increase the propensity for invasion by nonnative invasive plant
species (Service 2020, p. 67). Additionally, as far back as the mid-
1900s, livestock grazing has been implicated in facilitating the spread
of cheatgrass (Leopold 1949, p. 165; Billings 1951, p. 112). Livestock
grazing reduces invasion resistance by imposing a competitive
disadvantage on native herbaceous understory species and altering soil
properties (Reisner et al. 2013, p. 10). While livestock grazing has
been used strategically in sage-grouse habitat to control some invasive
weeds (Merritt et al. 2001, p. 4; Olsen and Wallander 2001, p. 30;
Connelly et al. 2004, p. 7-49) and woody plant encroachment (Riggs and
Urness 1989, p. 358), there is limited evidence that controlling
established cheatgrass through grazing is feasible. Rest from grazing
may, in fact, be a more effective strategy of building resistance to
invasion into a site (Reisner et al. 2013, p. 10). Collectively, these
studies suggest managed livestock grazing at moderate intensities in
the Bi-State area may be benign or even beneficial to some seasonal
sage-grouse habitats, but when grazing intensity exceeds this moderate
use level, livestock grazing can have negative effects on sage-grouse
habitat and individuals (Boyd et al. 2014, p. 60).
Historically, extensive rangeland management has been conducted by
Federal agencies and private landowners to reduce shrub cover and
improve forage conditions for livestock in the sagebrush-steppe
ecosystem (Connelly et al. 2004, p. 7-28; Knick et al. 2011, p. 220;
Pyke 2011, p. 534). Today, ongoing removal or control of sagebrush in
the Bi-State area is limited. The BLM and USFS have stated that, with
rare exceptions, they no longer convert sagebrush to other habitat
types, and that future treatments shall maintain, improve, or restore
Bi-State sage-grouse habitat (BLM 2016, p. 11; HTNF 2016, p. 16).
Federal land managers currently focus on improving the diversity of the
native plant community, reducing conifer encroachment, or reducing the
risk of large wildfires. On private lands in the Bi-State area, our
understanding of sagebrush treatments is limited. Known instances of
the elimination of sagebrush by chemical and mechanical means are
apparent, but their extent remains to be quantified. The ability to
restore or rehabilitate overgrazed areas depends on the condition of
the area relative to its site potential (Knick et al. 2011, p. 232).
Active restoration is required where the native understory is reduced
(Pyke 2011, p. 539). If an area has soil loss or invasive species,
returning the native plant community may be impossible (Daubenmire
1970,

[[Page 18071]]

p. 82; Knick et al. 2011, p. 232; Pyke 2011, p. 539).
Infrastructure related to livestock management such as water
developments (e.g., springs, tanks, guzzlers) and fences in shrub-
steppe habitats are common on public lands (Connelly et al. 2004, p. 7-
35). Development of springs and other water sources can artificially
concentrate domestic livestock and wild ungulates in mesic areas,
thereby exacerbating grazing and trampling impacts to sage-grouse
nesting and brood-rearing areas (Braun 1998, p. 147; Knick et al. 2011,
p. 230). Diverting water sources can result in the loss of riparian or
wet meadow habitat that sage-grouse depend upon as sources of forbs and
insects. However, water developments can also be beneficial to
sagebrush vegetation communities, as this practice can help distribute
livestock to water troughs and away from riparian areas, minimizing
concentrated impacts of livestock grazing.
In the Bi-State area, there are 149 grazing allotments identified
across all PMUs. Of these, 122 are considered active allotments,
encompassing approximately 73 percent of suitable sage-grouse habitat.
Most grazed lands are managed by the BLM and USFS, although much of the
meadow habitats are located on private lands (BSLPG 2004, entire).
Several rangeland health assessments (RHAs) or their equivalent have
been completed on 120 allotments (104 that are active) and have not
been conducted on the remaining 29 allotments (18 that are active).
While there are public allotments or portions of allotments exhibiting
adverse impacts from current or historical livestock grazing (e.g.,
vegetation condition or composition is generally less than desired),
our understanding is the majority of allotments in the Bi-State area
are in good condition (Axtell 2008, pers. comm.; Murphy 2008, pers.
comm.; Nelson 2008, pers. comm. BLM 2014b, in litt.; Bi-State TAC 2017,
pp. 31-33), and livestock grazing is generally thought to have a
limited impact on sage-grouse habitat (Bi-State TAC 2012, entire).
Livestock grazing will continue into the indefinite future within the
Bi-State area at its current or slightly decreased level, and thus
remain a discretionary action where Federal agencies have the ability
to alter use when renewing grazing permits. Also, it appears that
Federal land managers are moving in a direction that affords greater
discretion to sage-grouse habitat needs when evaluating livestock
management and the majority of allotments have or will have pending
renewals and associated terms and conditions that consider sage-grouse
habitat, including the establishment or placement of infrastructure
(Nelson 2008, pers. comm.; BLM 2016, pp. 11-12; HTNF 2016, pp. 16-18).
In addition to domestic livestock, feral horses can negatively
impact meadows and brood-rearing habitats used by sage-grouse, and
these impacts can be more severe given horses cannot be managed on a
seasonal basis (Connelly et al. 2004, p. 7-37; Crawford et al. 2004, p.
11). Horse presence may negatively affect sagebrush vegetation
communities and habitat suitability for sage-grouse by decreasing grass
cover, fragmenting shrub canopies, altering soil characteristics,
decreasing plant diversity, and increasing the abundance of invasive
cheatgrass. In areas utilized by both horses and cattle, it is unknown
whether grazing impacts are synergistic or additive (Beever and
Aldridge 2011, p. 286). The most substantial impacts from feral horses
in the Bi-State area occur in the Pine Nut, Mount Grant, and White
Mountains PMUs (Axtell 2008, pers. comm.; Bi-State TAC 2012, pp. 19,
37, 41), although they are also known to occur within the Bodie and
South Mono PMUs. We are unaware of the specific severity and scope of
impacts caused by feral horses on the Bi-State DPS and sage-grouse
habitat, although localized areas of concern in all PMUs are apparent.
Most important are probable impacts to mesic areas within the Pine Nut,
Mount Grant, and White Mountains PMUs. Management of herd size by
Federal agencies is an ongoing challenge as horse management is
expensive and often controversial. Based on this understanding, we
anticipate future impacts caused by wild horses to increase, especially
as horse herds are growing by 20 percent annually. However, despite
this increase, the threat will have a minor impact on sagebrush
habitat.
Existing regulatory mechanisms such as BLM land management plans
and USFS LRMPs further reduce the magnitude of threats associated with
grazing and rangeland management. For example, the Central California
Standards and Guidelines of the Bishop RMP provide additional direction
for the management of permitted livestock grazing on public lands
administered by the Bishop Field Office. Standards are set for soil,
species, riparian, and water quality, and metrics by which the
achievement of these standards could be measured were established. This
enables BLM to manage livestock grazing to ensure that species such as
sage-grouse are ``healthy and in numbers that appear to ensure stable
to increasing populations; habitat areas are large enough to support
viable populations or are connected adequately with other similar
habitat areas.'' Additionally, the Carson City District Land Use Plan
Amendment for the Nevada and California Greater Sage-grouse Bi-State
Distinct Population Segment addresses conservation of the Bi-State area
by providing specific direction to management of the DPS and its
habitat, including grazing management and wild horse and burro
management (BLM 2016, entire). Numerous land use allocations restrict
or substantially limit new habitat and bird disturbances and identify
Best Management Practices to further minimize allowable actions. For
more details on plans that address the impacts of grazing and rangeland
management, see the Existing Regulatory Mechanisms of the Species
Report (Service 2020, pp. 124-136).
Analyzing the overall impacts of grazing is difficult, as there is
little direct evidence linking grazing effects and sage-grouse
population responses. Analyses for grazing impacts at landscape scales
important to sage-grouse are confounded by the fact that almost all
sage-grouse habitat has at one time been grazed and thus no ungrazed
control areas exist for comparisons (Knick et al. 2011, p. 232).
Overall, impacts from historic grazing and current rangeland management
occur within localized areas throughout the Bi-State DPS's range,
though it is more pronounced in some PMUs than others. Domestic
livestock and feral horses have the potential to negatively affect
sage-grouse habitats by decreasing grass cover, fragmenting shrub
canopies, altering soil characteristics, decreasing plant diversity,
and increasing the abundance of invasive plant species, although their
impacts and management potential can differ. Grazing and domestic
livestock management has the potential to result in sage-grouse habitat
degradation, though there is some conflicting information on whether
some of the impacts of grazing are positive or negative. The Pine Nut
and Mount Grant PMUs may be most sensitive to impacts from grazing as
both PMUs are generally lower in elevation and receive less
precipitation, making their sagebrush habitat less resistant to
withstanding changes. Across the remainder of the PMUs, localized areas
of meadow degradation are apparent, and these conditions may influence
sage-grouse populations, as meadows are essential for recruitment of
young.
Overall, impacts from past grazing and rangeland management occur
within localized areas in all PMUs,

[[Page 18072]]

although impacts are more pronounced in some PMUs than others. We
concluded in the 2013 proposed listing rule that grazing and rangeland
management was a factor (albeit not significant) for proposing to list
the DPS as a threatened species as a result of ongoing habitat
degradation impacts that may affect sage-grouse habitat in the Bi-State
area, resulting in an overall reduction in aspects of habitat quality
(e.g., fragmentation, lack of understory plants, increased presence of
nonnative plant species), especially in the Pine Nut and Mount Grant
PMUs. While we recognize that livestock and feral horses may negatively
impact sage-grouse habitat, we affirm that it does not appear that this
is a significant concern in the Bi-State area today.
Importantly, conservation efforts that address the impacts from
grazing and rangeland management have continued to be implemented since
publication of the proposed listing rule, including (but not limited
to): (1) Completing drafts and beginning to implement the new BLM and
USFS Land Use Plan amendments (U.S. Department of the Interior and USDA
2015, entire), which are a considerable improvement for conservation of
the Bi-State DPS and its habitat; repairing watering facilities,
irrigation structures, and fencing around natural riparian areas to
control grazing activity; increasing monitoring and management of horse
and burrow herds; and restoring meadow/riparian habitat in critical
brood-rearing habitat areas. With continued implementation of
conservation actions associated with the BSAP (Bi-State TAC 2012,
entire), impacts from grazing and rangeland management are
significantly reduced.
The BSAP (Bi-State TAC 2012, entire) includes measures to counter
effects such as livestock and wild horse grazing. Because we have
determined that the partially completed and future conservation efforts
will be implemented and effective (see Policy for Evaluation of
Conservation Efforts When Making Listing Decisions, below), we believe
impacts associated with grazing and rangeland management are not a
concern now or in the foreseeable future.

Nonnative Invasive Plants and Native Woodland Succession

Shifting vegetation communities within the Bi-State area are
altering sagebrush habitat that supports sage-grouse. Nonnative
invasive plants such as cheatgrass alter sagebrush community structure,
composition, productivity, nutrient cycling, and hydrology (Vitousek
1990, p. 7). Nonnative plants may also cause declines in native plant
populations through mechanisms such as competitive exclusion and niche
displacement (Mooney and Cleland 2001, p. 5446). They can create long-
term changes in ecosystem processes, such as altering fire cycles and
other disturbance regimes; these changes can persist even after an
invasive plant is removed (Zouhar et al. 2008, p. 33).
Nonnative plants degrade existing sage-grouse habitat, replacing
vegetation essential to sage-grouse for food and cover (Connelly et al.
2000a, pp. 971-972; Miller et al. 2011, pp. 160-164). The presence of
cheatgrass influences lek persistence, nest site selection, and
ultimately population performance (Blomberg et al. 2012, p. 7; Knick et
al. 2013, p. 1544; Lockyer et al. 2015, p. 791; Coates et al. 2016b, p.
12747). Nonnative plants affect sage-grouse habitat and population
demographics both in the short term (e.g., nest site selection, loss of
forbs and associated insects) and in the long term (e.g., population
growth, sagebrush displacement and habitat fragmentation).
A variety of nonnative invasive plants are present within the Bi-
State area, although cheatgrass is of greatest concern. Local managers
and scientists consider cheatgrass to be a low-level threat across four
PMUs (White Mountains, South Mono, Bodie, and Desert Creek-Fales), a
moderate threat in the Mount Grant PMU, and a high threat in the Pine
Nut PMU (Bi-State TAC 2012, pp. 19, 26, 32, 37, 41, 49). Areas of
greatest concern are in the Pine Nut PMU where cheatgrass abundance is
greatest and where there are restoration challenges following several
recent wildfires. Averaged across the entire Bi-State, percent cover of
cheatgrass is generally low (Peterson 2003, entire), and conversion to
an annual grass dominated community is currently limited to only a few
locations. Anecdotal reports suggest this assessment remains generally
true, though it is apparent that the abundance and distribution of
cheatgrass has increased over the past decade.
Efforts are ongoing to restore or rehabilitate sage-grouse habitat
affected by nonnative plant species, but the techniques for
accomplishing these efforts remain mostly unproven, experimental, and
often logistically difficult (Pyke 2011, pp. 543-544). Regardless,
restoration efforts such as localized weed treatments have been applied
within all the Bi-State PMUs.
Based on our understanding and past experience with nonnative
invasive species in the Great Basin Region, we anticipate that impacts
from nonnative species will continue or increase into the future.
According to a mapping of sagebrush habitats across the range of
greater sage-grouse that categorized these habitats based on their
resistance and resilience to disturbance, both resistance and
resilience are low in the warm and dry sagebrush habitats contained
within the Nevada portion of the Bi-State (Pine Nut, Mount Grant, and
Desert Creek portion of the Desert Creek-Fales PMUs) and most of the
South Mono PMU (Chambers et al. 2014, pp. 16-17). That is, these areas
have lower productivity and higher susceptibility to cheatgrass or
other invasive annual grass incursion and will therefore face greater
restoration challenges should fire occur. In the wetter and cooler
sagebrush habitats found in the White Mountains, Bodie, Fales portion
of the Desert Creek--Fales PMUs, and high-elevation sites of the Mount
Grant PMU, resilience and resistance were ranked as moderately high to
high, implying these locations have greater productivity and are
generally less suitable to invasive annual grass establishment
(Chambers et al. 2014, p. 43).
In addition to nonnative plant invasions within sagebrush habitat,
some native tree species are increasing in sagebrush habitat and
impacting the suitability of the habitat for the various life processes
of the sage-grouse. Pinyon-juniper woodlands are a native vegetation
community that can encroach upon, infill, and eventually replace
sagebrush habitat. The cause of this conversion from shrubland to
woodland is debatable but may be due to a suite of causes acting in
concert with active wildfire suppression including: Domestic livestock
grazing (reduced competition from native grasses and forbs and
facilitation of tree regeneration by increased shrub cover and enhanced
seed dispersal), climatic fluctuations favorable to tree regeneration,
enhanced tree growth due to increased water use efficiency associated
with carbon dioxide fertilization, and recovery from past disturbance
(natural and anthropogenic) (Miller et al. 2008, p. 10; Baker 2011, p.
200; Miller et al. 2011, pp. 167-169; Bukowski and Baker 2013, p. 560).
Each of these factors have likely influenced the current pattern of
vegetation in the Bi-State area today and have led to an estimated 40
percent decline in sagebrush extent due to woodland succession and
isolation of sage-grouse populations across the DPS.
Land managers in the Bi-State area consider pinyon-juniper
encroachment a substantial threat to sage-grouse because it impacts
habitat quality, quantity, and connectivity, and

[[Page 18073]]

increases the risk of avian predation to sage-grouse populations (BSLPG
2004, pp. 20, 39, 96; Bi-State TAC 2012, pp. 18-47). Previously
occupied sage-grouse locations throughout the Bi-State area are thought
to have been abandoned due to woodland succession (Bi-State TAC 2012,
pp. 18-47). The extent of the conversion to pinyon-juniper woodland
varies by PMU, with the South Mono PMU being the least impacted
(approximately 13 percent loss) and the Pine Nut PMU being the most
influenced (approximately 50 percent loss). The remainder of the PMUs
(White Mountains, Mount Grant, Desert Creek-Fales, and Bodie) are each
estimated to have experienced approximately a 40 percent loss of
historical sagebrush vegetation to woodland succession. In total, over
the past 150 years, an estimated 390,000 ha (963,000 ac) of sagebrush
habitat has converted to woodland vegetation, resulting in a loss of
availability of total sagebrush habitat in the Bi-State area (which is
not synonymous with suitable sage-grouse habitat as presented in Table
1) from slightly over 1,000,000 ha (2,580,000 ac) in 1850 to
approximately 650,000 ha (1,600,000 ac) today across the Bi-State DPS
(USGS 2012, unpublished data).
In order to counter the impact of pinyon-juniper encroachment,
treatments to thin or remove woodland species are ongoing. Recent
research supports previous assertions that these treatments would
expand sage-grouse habitat and ultimately be used successfully by birds
(Sandford et al. 2017, p. 63; Severson et al. 2017, p. 53; Olsen 2019,
pp. 21-22). Sage-grouse response to woodland encroachment has been
negative to the incursion but in some instances responsive to treatment
actions. Sage-grouse encountering pinyon-juniper communities coupled
with the rate of movement through these communities negatively affected
bird survival (Prochazka et al. 2017, p. 46); however, sage-grouse
readily nested in conifer treatment sites after trees had been removed
(Severson et al. 2017, p. 53). Woodland treatments increased suitable
available breeding habitat and enhanced nest and brood success
(Sandford et al. 2017, p. 63). Sage-grouse avoided pinyon-juniper
communities across varying degrees of community dominance; this
avoidance increased survival (Coates et al. 2017b, pp. 31-33). Removal
of pinyon-juniper trees encroaching into sagebrush vegetation
communities can increase sage-grouse population growth through
improving juvenile, yearling, and adult survival as well as improving
nest survival (Olsen 2019, pp. 21-22). This research found population
growth was 11.2 percent higher in treatment than in control sites
within 5 years of conifer removal. Therefore, woodland encroachment
into occupied sage-grouse habitat reduces, and likely eventually
eliminates, sage-grouse occupancy. However, treatment action to remove
trees increases sagebrush habitat, and these habitats are used
successfully by sage-grouse.
Prior to the development of the BSAP in 2012, approximately 18
woodland thinning or removal projects had been undertaken, removing
approximately 5,454 ha (13,479 ac) of woodland (Bi-State TAC 2012, p.
5). Since this time, an additional 81 projects have been initiated,
treating approximately 18,798 ha (46,450 ac). While it is premature to
detect a population-level response of sage-grouse to these treatments
in the Bi-State region, increases in occupied habitat and increases in
nest and brood success as well as survival parameters are anticipated
based on recent research finding a positive overall outcome for
population performance and connectivity (Coates et al. 2017b, pp. 31-
33; Sandford et al. 2017, p. 63; Severson et al. 2017, p. 53; Olsen
2019, pp. 21-22). Furthermore, preliminary analysis of marked birds in
the Bi-State area demonstrates grouse use of these treatments and
offers support for these research findings (Mathews et al. 2018, pp.
33-34). Implementation and planning of additional woodland treatment
projects are also under way over the next several years covering tens
of thousands of acres.
Using the best available data, we estimate that the current acres
of conifer removal treatments is within the range of estimated acres of
woodland expansion and, further, that these treatments will continue
based on ongoing commitments provided by land managers to implement the
BSAP.
Overall, we consider woodland succession to pose a substantial
threat to the Bi-State DPS. However, we consider impacts from woodland
succession to be reduced by conservation measures with a high degree of
implementation and effectiveness, recognizing that restoring historical
connectivity and preventing further loss of suitable habitat requires
continued focused active management.
Both nonnative invasive plants and native woodland succession are
impacting the sage-grouse and its habitat in the Bi-State area. In
general, nonnative plants are not abundant throughout the Bi-State
area, with the exception of cheatgrass that occurs in all PMUs and is
most extensive and of greatest concern in the Pine Nut PMU. Cheatgrass
is a nonnative annual species that will likely continue to expand
throughout the Bi-State region in the future and increase the adverse
impact that currently exists to sagebrush habitats and sage-grouse
through outcompeting beneficial understory plant species and altering
the fire ecology of the area. Land managers have had limited success
preventing cheatgrass invasion in the West, and elevational barriers to
occurrence are becoming less restrictive. The best available data
suggest that future conditions that could promote expansion of
cheatgrass will be most influenced by precipitation and winter
temperatures (Bradley 2009, p. 200). Cheatgrass is a serious challenge
to the sagebrush shrub community, and its spread will be detrimental to
sage-grouse in the Bi-State area. In addition, the encroachment of
native woodlands (particularly pinyon-juniper) into sagebrush habitats
continues to occur throughout the Bi-State area. Currently, however,
treatment actions are on par with the expansion rate.
Overall, invasive nonnative and native plants occur throughout the
entire Bi-State DPS's range. We concluded in the proposed listing rule
that their spread was a significant factor for proposing to list the
DPS as a threatened species based on the extensive amount of pinyon-
juniper encroachment and cheatgrass invasion that is occurring
throughout the DPS's range, and the interacting impact these invasions
have on habitat quality (e.g., reduces foraging habitat, increases
likelihood of wildfire) and habitat fragmentation. Today, we affirm
that nonnative and native invasive species occur throughout the Bi-
State DPS's range and are significant threats to the species both
currently and in the future. We expect this threat will increase across
the range into the future unless it is actively managed.
Several regulatory mechanisms identified in existing federal land
use plans address the impact of nonnative invasive plants and native
woodland succession, the BSAP (Bi-State TAC 2012, entire) includes
measures to counter the effects of these threats. In the past few
years, we have gained increased certainty about the effectiveness of
removal efforts for pinyon-juniper woodland. Because we have determined
that the partially completed and future conservation efforts will be
implemented and effective (see Policy for Evaluation of Conservation
Efforts When Making Listing Decisions, below), the threat of native
woodland succession is being reduced, though it is still impacting

[[Page 18074]]

sagebrush habitat throughout the DPS. Conservation measures are less
effective at controlling and ameliorating the effects of nonnative
invasive plants, and thus they will continue to affect sagebrush
habitat into the foreseeable future.

Wildfires and Altered Fire Regime

Wildfire is the principal disturbance mechanism affecting sagebrush
communities. The nature of historical fire patterns, particularly in
big sagebrush, is not well understood; however, it was historically
infrequent (Miller and Eddleman 2000, p. 16; Zouhar et al. 2008, p.
154; Baker 2011, pp. 189, 196). Most sagebrush species have not
developed evolutionary adaptations such as re-sprouting and heat-
stimulated seed germination found in other shrub-dominated systems,
such as chaparral, that are exposed to relatively frequent fire events.
Natural fire regimes and landscapes were shaped by a few infrequent
large fire events; historical fire rotation was 50-200 years in
mountain big sagebrush communities and 200-350 years in Wyoming big
sagebrush communities (Baker 2011, p. 196; Bukowski and Baker 2013, pp.
556-558). In general, fire extensively reduces sagebrush within burned
areas, and big sagebrush varieties, the most widespread species of
sagebrush, can take decades to reestablish and even longer to return to
pre-burn conditions (Service 2020, p. 79). While no specific studies
have been conducted within the Bi-State area to inform our knowledge of
fire rotation, we expect the pattern in Wyoming big sagebrush and
mountain big sagebrush communities in the Bi-state area to be similar
to those described above for the remainder of the species' range.
Both increases and decreases in the natural fire regime can have
detrimental effects on sagebrush. When intervals between wildfire
events become unnaturally long, woodlands can encroach into sagebrush
communities as the prolonged interval between fires allows seedlings to
establish and trees to mature (Miller et al. 2011, p. 167). Currently,
active wildfire suppression continues to occur throughout the Bi-State
DPS.
Conversely, the invasion and establishment of nonnative invasive
annual grasses, such as cheatgrass and medusahead rye (Taeniatherum
caput-medusae) can increase wildfire frequency within sagebrush
ecosystems and negatively influence the likelihood of recovery (Zouhar
et al. 2008, p. 41; Miller et al. 2011, p. 167; Balch et al. 2013, p.
178). Cheatgrass shortens historical fire patterns by providing an
abundant and easily ignitable fuel source that facilitates fire spread
and recovers within 1-2 years of a wildfire event, leading to a
recurring wildfire cycle that prevents sagebrush reestablishment (Young
and Evans 1978, p. 285; Eiswerth et al. 2009, p. 1324; Balch et al.
2013, pp. 180-181). It is difficult and usually ineffective to restore
sagebrush after annual grasses become established due to the positive
feedback with fire, invasive species seed bank establishment, and
alterations to soil and hydrologic processes (Paysen et al. 2000, p.
154; Connelly et al. 2004, pp. 7-44-7-50; Pyke 2011, p. 539).
Fire can have direct impacts on sage-grouse and their habitat. If
fire does not completely remove sagebrush, it can reduce suitable
nesting habitat, herbaceous understory vegetation used for forage and
cover by sage-grouse hens and chicks, and potentially insects used for
feeding by chicks. Additionally, isolation and fragmentation of
populations due to habitat losses from wildfire presents a higher
probability of extirpation in disjunct areas (Knick and Hanser 2011, p.
395; Wisdom et al. 2011, p. 469). This is a concern within the Bi-State
area, specifically throughout the Pine Nut and portions of the South
Mono and Desert Creek-Fales PMUs where burned habitat may be
influencing already small and disjunct populations. As areas become
fragmented and isolated through disturbances such as wildfire,
persistence may be hampered by the limited ability of individuals to
disperse into areas that are otherwise not self-sustaining. Thus, while
direct loss of habitat due to wildfire has been shown to be a
significant factor associated with population persistence for sage-
grouse (Beck et al. 2012, p. 452), the indirect effect posed by loss of
connectivity among populations may greatly expand the influence of this
threat beyond the physical fire perimeter (Knick and Hanser 2011, pp.
401-404).
Sagebrush recovery rates following wildfire are highly variable,
and precise estimates are often hampered by limited data from older
burns. Factors contributing to the rate of shrub recovery include the
amount of and distance from unburned habitat, abundance and viability
of seed in soil seed bank (sagebrush seeds are typically viable for one
to three seasons depending on species), rate of seed dispersal, and
pre- and post-fire weather, which influences seedling germination and
establishment (Young and Evans 1989, p. 204; Maier et al. 2001, p. 701;
Ziegenhagen and Miller 2009, p. 201). Full recovery to pre-burn
conditions in mountain sagebrush communities ranges between 25 and 100
years, and in Wyoming big sagebrush communities potentially ranges
between 50 and 120 years (Baker 2011, pp. 194-195). By 25 years post-
fire, Wyoming big sagebrush typically has less than 5 percent pre-fire
canopy cover (Baker 2011, p. 195).
Wildfire is considered a relatively high risk across all the PMUs
in the Bi-State area due to its ability to affect large landscapes in a
short period of time (Bi-State TAC 2012, pp. 19-49). Furthermore, the
future potential of this risk is exacerbated by the presence of people,
invasive species, and climate change. While numerous wildfires have
occurred in the Pine Nut, and South Mono PMUs (fewer in the other PMUs)
over the past 18 years, to date there have been relatively few large-
scale events (Service 2020, Table 3). In general, current data also do
not indicate an increase of wildfires in the PMUs over time with the
exception of the Pine Nut PMU where fire occurrence is more frequent
(Service 2018, unpublished data). Furthermore, cheatgrass has a more
substantial presence in the Pine Nut PMU, which appears to mirror (much
more than the rest of the Bi-State area) the damaging fire and invasive
species cycle impacting sagebrush habitat across much of the Great
Basin.
The loss of habitat due to wildfire across the West is anticipated
to increase due to the intensifying synergistic interactions among
fire, people, invasive species, and climate change (Miller et al. 2011,
p. 184). The past- and present-day fire regimes across the sage-
grouse's range have changed with a demonstrated increase of wildfires
in the more arid Wyoming big sagebrush communities and a decrease of
wildfire across many mountain sagebrush communities (Miller et al.
2011, pp. 167-169). Both altered fire regime scenarios have caused
significant losses to sage-grouse habitat through facilitating conifer
expansion at high-elevation interfaces and nonnative invasive weed
encroachment at lower elevations (Miller et al. 2011, pp. 167-169). In
the face of climate change, both scenarios are anticipated to worsen
(Baker 2011, p. 200; Miller et al. 2011, p. 179), including in the Bi-
State area. Predicted changes in temperature, precipitation, and carbon
dioxide are all anticipated to influence vegetation dynamics and alter
fire patterns, resulting in increasing loss and conversion of sagebrush
habitats (Neilson et al. 2005, p. 157). Furthermore, climate scientists
suggest that, in addition to the predicted change in climate toward a
warmer and generally drier Great Basin, variability

[[Page 18075]]

of annual and decadal wet-dry cycles will likely increase and act in
concert with fire, disease, and invasive species to further stress the
sagebrush ecosystem (Neilson et al. 2005, p. 152, Ault et al. 2014, p.
7538). The anticipated increase in suitable conditions for wildland
fire will likely further interact with people and infrastructure.
Human-caused fires have increased and are correlated with road presence
across the sage-grouse range (Miller et al. 2011, p. 171).
Based on the best available information, approximately 117 wildfire
events have affected approximately 83,859 ha (207,220 ac) of sagebrush
habitat across the Bi-State area since 2000, but conversion of
sagebrush habitat to a nonnative invasive vegetation community has been
largely restricted (Pine Nut PMU withstanding). It appears that a lack
of historical fire has facilitated the establishment of woodland
vegetation communities and loss of sagebrush habitat. Both the ``too
little'' and ``too much'' fire scenarios present challenges for the Bi-
State DPS. The former influences the current degree of connectivity
among sage-grouse populations in the Bi-State DPS and the extent of
available sagebrush habitat, likely affecting sage-grouse population
size and persistence. The latter, under current conditions, now has the
potential to quickly alter substantial percentages of remaining
sagebrush habitat. Restoration of sagebrush communities is challenging,
requires many years, and may be ineffective in the presence of
nonnative invasive grass species. Research in the Great Basin found
that sage-grouse habitat features are unlikely to occur in many burned
areas even 20 years post-restoration (Arkle et al. 2014, p. 15).
Several regulatory mechanisms target the potential impact of
wildfires and altered fire regime. Within the Bi-State area,
participants in the BSAP (Bi-State TAC 2012, entire) have treated areas
to reduce the threat of wildfire by using broadcast burns and
mechanical treatment (e.g., fuel breaks and conifer removal projects).
To lower the risk of wildfire, approximately 1,806 ha (4,462 ac) of
fuels reduction treatments have been conducted to remove conifers (Bi-
State TAC 2018, unpublished data). Additionally, the reseeding of 7,699
ha (19,025 ac) from past fires has been completed. The efficacy of
these treatments to achieve desired results is generally unknown.
Overall, the threat of wildfire and the existing altered fire
regime occurs throughout the Bi-State DPS's range. We concluded in the
proposed listing rule that significant impacts would be expected to
continue or increase in the future based on a continued fire frequency
pattern that exacerbates pinyon-juniper encroachment into sagebrush
habitat in some locations, but also an increased fire frequency in
other locations that promotes the spread of cheatgrass and other
invasive species that in turn can hamper recovery of sagebrush habitat.
Within the Bi-State DPS, the continued reduced fire frequency
exacerbates pinyon-juniper encroachment into sagebrush habitat in some
locations. However, an increased fire frequency in other locations
promotes the spread of cheatgrass and other invasive species that in
turn can hamper recovery of sagebrush habitats in other locations.
While it is not currently possible to predict the extent or location of
future fire events in the Bi-State area, we anticipate fire frequency
to increase in the future due to the increasing presence of cheatgrass,
human footprint, and the projected effects of climate change.
The BSAP (Bi-State TAC 2012, entire) includes measures to counter
effects such as wildfire ignition risks and catastrophic fire. Fuels
reduction projects and rehabilitation efforts post-wildfire have been
and will continue to be implemented into the future to address the
potential impacts from wildfire, including (but not limited to):
Conducting conifer (pinyon-juniper) removal and conducting weed
treatments for invasive, nonnative plants such as cheatgrass. Because
we have determined that the partially completed and future conservation
efforts will be implemented and effective (see Policy for Evaluation of
Conservation Efforts When Making Listing Decisions, below), we conclude
that impacts due to the threat of wildfires and altered fire regime
have been reduced since the time of the 2013 proposed listing rule. We
expect that, into the future, continued implementation of the BSAP will
further reduce the impacts of wildfire and altered fire regime.

Climate

In considering future climate projections for the Bi-State area, we
analyzed multi-model ensembles that made use of multiple greenhouse gas
emission scenarios. In general, downscaled climate change model
predictions in the Bi-State area tend to agree on an increasing
temperature regime (Cayan et al. 2008, pp. S38-S40; He et al. 2018, p.
11; Gonzalez et al. 2018, Chapter 25) and stable to increasing local
precipitation, with a shift in timing of local precipitation events
(Diffenbaugh et al. 2005, p. 15776; Cayan et al. 2008, p. S28; He et
al. 2018, p. 14: Reich et al. 2018, p. 21). The environment will be
relatively drier due to elevated temperature, increased rates of
evapotranspiration, more precipitation falling as rain instead of snow,
and more frequent and prolonged drought (Neilson et al. 2005, p. 150;
He et al. 2018, pp. 9, 11, 16). The precipitation variables are an
important predictor of sagebrush occurrence as well as to greater sage-
grouse occurrence, as timing and quantity of precipitation greatly
influences plant community composition and extent--specifically forb
production, which in turn affects nest and chick survival and
ultimately population performance (Blomberg et al. 2012, p. 7; Coates
et al. 2018, p. 252). Impacts associated with climate change may
increase the magnitude of threats impacting the Bi-State DPS, as its
effects interact with other stressors such as disease, invasive
species, prey availability, moisture, vegetation community dynamics,
disturbance regimes, habitat degradation, and habitat loss (Service
2020, p. 89).
Downscaled climate change projections in the Great Basin and
Eastern Sierra also predict acceleration in fire frequency, with fires
potentially becoming larger and more severe, and fire seasons becoming
longer (Service 2020, pp. 87-88). Furthermore, drought frequency and
persistence are anticipated to increase (Ault et al. 2014, p. 7545;
Reich et al. 2018, p. 31; Gonzalez et al. 2018, entire). In the Bi-
State area, drought is a natural part of the sagebrush ecosystem. Sage-
grouse population performance in the Bi-State region responds to
alterations in annual precipitation (Coates et al. 2018, p. 252; Coates
et al. 2020, p. 27). While there is variation among subpopulations, on
average findings suggest a 50 percent increase in precipitation
corresponds to a 15.5 percent increase in population growth the
following year. Moreover, these results indicate that precipitation
needs to be approximately 20 percent greater than average for
population recovery following drought, consistent with results from the
Great Basin in the absence of wildfire (Coates et al. 2016b, p. 12747;
Coates et al. 2018, p. 255).
Sage-grouse are affected by drought through the loss of vegetative
habitat components, reduced insect production (Connelly and Braun 1997,
p. 9), and potentially exacerbation of West Nile virus (WNv) and
predation exposure (Gibson et al. 2017, p. 177; Prochazka et al. 2017,
p. 47; Coates et al. 2018, p. 255). Drought reduces vegetation cover
(Milton et al. 1994, p. 75; Connelly et al. 2004, p. 7-18), potentially
resulting in

[[Page 18076]]

increased soil erosion and subsequent reduced soil depths, decreased
water infiltration, and reduced water storage capacity. These habitat
component losses can result in declining sage-grouse populations due to
increased nest predation and early brood mortality associated with
decreased nest and brood cover and food availability (Braun 1998, p.
149; Moynahan et al. 2007, p. 1781). Furthermore, there are known
occasions where the reduced condition of brood-rearing habitat due to
weather has resulted in little to no recruitment within certain PMUs
(Bodie, Pine Nut) (Gardner 2009, pers. comm.; Coates 2012, pers.
comm.).
Within the Bi-State area, several projects have been undertaken to
improve meadows and riparian areas for sage-grouse that could help
increase population resiliency in response to increasing frequency of
drought. These projects include grazing exclosures, changes to grazing
management plans, prescribed fires, invasive plant control, mechanical
treatments, and conservation easements intended to improve the
resiliency of meadow habitats on privately owned lands (Bi-State TAC
2018, unpublished data).
Climate change is not known to currently impact the Bi-State DPS to
such a degree that the viability of the species is at stake, although
climate change has been shown to influence the impact of drought and
the annual water cycle and these in turn have been shown to influence
grouse population performance in the Bi-State area (Coates et al. 2018,
p. 251; Reich et al. 2018, pp. 31, 33). However, while it is reasonable
to assume the Bi-State area will experience vegetation changes into the
future (as presented above), we do not know the degree to which these
changes will ultimately have impacts on the Bi-State DPS. An analysis
conducted by NatureServe, which incorporates much of the information
presented above, suggests a substantial contraction of both sagebrush
and sage-grouse range in the Bi-State area by 2060 (Comer et al. 2013,
pp. 142, 145).
Occurrence of cheatgrass has generally been restricted to
elevations below approximately 1,700 m (5,500 ft.) above mean sea level
(Bradley 2010, p. 202). More recently, this barrier appears less
certain in the Bi-State area as cheatgrass occurs at elevations
previously thought to be relatively unfavorable based on the grass's
ecology. This situation suggests that few locations in the Bi-State
area are immune to cheatgrass invasion. Climate change may strongly
influence the spread of this species as the available climate data
suggests changes in timing of precipitation and increasing winter
temperatures favorable to this species (Bradley 2009, p. 200).
Predictions on the timing, type, and amount of precipitation contain
the greatest uncertainty. In the Bi-State area, model scenarios that
result in the greatest expansion of cheatgrass suggest much of the area
remains suitable to cheatgrass presence with some additional high-
elevation sites in the Bodie Hills, White Mountains, and Long Valley
becoming more suitable than they are today (Bradley 2009, p. 204). On
the opposite end of the spectrum, model scenarios that result in the
greatest contraction in cheatgrass range suggest low-elevation sites
such as Desert Creek-Fales and Mount Grant PMUs become less suitable
for this invasive species but high-elevation sites (Bodie and White
Mountains PMUs), where habitat conditions are generally marginal today,
become more suitable in the future.
Based on this information we assume that climate change (acting
both alone and in concert with impacts such as wildfire and nonnative
invasive species) could be pervasive throughout the range of the Bi-
State DPS, potentially degrading habitat to such a degree that all
populations would be negatively affected with some low-elevation sites
or populations currently exposed to greater cheatgrass abundance (Pine
Nut, Desert Creek-Fales, South Mono and portions of the Mount Grant
PMUs). Therefore, given the scope and potential severity of climate
change when interacting with other threats in the future, the overall
impact of climate change to the Bi-State DPS at this time is considered
moderate to high.
We concluded in the proposed listing rule that climate change will
potentially act in combination with other impacts to the Bi-State DPS,
further diminishing habitat and increasing population isolation, making
the DPS more susceptible to demographic and genetic challenges or
disease. Although no regulatory mechanisms are available that can
ameliorate the effect of changing climate or increasing drought,
ongoing implementation of various conservation measures in the BSAP
increases the resilience of the habitat to the effects of threats
exacerbated by climate change and drought, such as wildfire and
invasive plants (e.g., through removal of pinyon-juniper woodland). We
expect that, into the future, continued implementation of the BSAP will
further reduce the impacts of these threats associated with climate
change.

Recreation

Recreational activities such as fishing, hiking, horseback riding,
and camping, off-highway vehicle (OHV) use (including snowmobiles), and
mountain biking occur throughout the range of the greater sage-grouse,
including throughout the Bi-State DPS area. These activities can
degrade wildlife resources, water, and land by distributing refuse,
disturbing and displacing wildlife, increasing animal mortality, and
decreasing diversity of plant communities (Boyle and Samson 1985, pp.
110-112).
The effects of OHV use on sage-grouse have not been directly
studied (Knick et al. 2011, p. 219). However, sage-grouse avoidance of
activities associated with development suggests they are disturbed by
persistent human presence (Holloran 2005, pp. 43, 53, 58; Doherty et
al. 2008, p. 194). Sage-grouse response to disturbance may be
influenced by the type of activity, recreationist behavior,
predictability of activity, frequency and magnitude, activity timing,
and activity location (Knight and Cole 1995, p. 71). Disruption of
sage-grouse during vulnerable periods at leks, or during nesting or
early brood-rearing, could affect reproduction and survival (Baydack
and Hein 1987, pp. 537-538).
Indirect effects to sage-grouse from recreational activities may
include impacts to vegetation and soils and facilitation of the spread
of invasive species. One study found long-term (2-year) reductions in
sagebrush shrub canopy cover as the result of repeated OHV trips (Payne
et al. 1983, p. 329). Increased sediment production and decreased soil
infiltration rates were observed after disturbance by motorcycles and
four-wheel drive trucks on two desert soils in southern Nevada; noise
from these activities can also cause additional disturbance (Eckert et
al. 1979, p. 395; Knick et al. 2011, p. 219; Blickley et al. 2012, p.
467). Unpaved roads fragment sagebrush landscapes and subsidize
predators adapted to humans; they also provide disturbed surfaces that
facilitate the spread of invasive plant species (Knick et al. 2011, p.
219).
Potential disturbance caused by non-motorized forms of recreation
(fishing, camping, hiking, big game hunting, dog training) are most
prevalent in the South Mono and Bodie PMUs. These PMUs are also exposed
to tourism-associated activity centered on Mono Lake and the towns of
Mammoth Lakes and Bodie. The exact amount of recreational activity or
user days occurring in the area is not known; however, the number of
people in the area appears to increase

[[Page 18077]]

annually (Nelson 2008, pers. comm.; Taylor 2018, pers. comm.).
A 2012 assessment reported recreation and human disturbance to be
low-level threats in the Bodie and Mount Grant PMUs but relatively high
threats in the Pine Nut and South Mono PMUs (Bi-State TAC 2012, pp. 19,
32, 37, 49). To address these apparent challenges, across the Bi-State,
vehicular travel is limited to designated roads and trails and
development of new roads is largely restricted. In addition, organized
OHV events are prohibited during specific dates and in specific
habitats (breeding and winter) limiting the exposure of birds (BLM
2016, pp. 13-14; HTNF 2016, p. 43).
Currently, there are few quantifiable data available to assess the
degree of the impacts of recreation. The level of recreational activity
associated with a specific road, for instance, is not known even though
anecdotal information suggests that the level of activity (OHV numbers)
is generally increasing. All the PMUs are relatively close to urban
centers; thus, we anticipate recreational activity will continue and
likely increase. However, all public lands in the Bi-State restrict OHV
use to designated roads and trails and existing land use plans afford
management oversite of this activity, thereby lessening the likelihood
of broad scale habitat degradation.
Overall, recreation occurs throughout the Bi-State DPS's range,
although we do not have data that would indicate impacts to sage-grouse
or their habitat are significant. We concluded in the proposed listing
rule and reaffirm here that, by itself, recreation is not considered a
significant impact at this time. However, if left unchecked, some forms
of recreation could become a concern based on anticipated increases of
recreational use within the Bi-State area in the future. Conservation
efforts that address recreational impacts have continued to be
implemented since publication of the proposed listing rule, including
(but not limited to): Reducing human-related disturbances in high-use
recreation areas (e.g., installing sage-grouse educational signs),
conducting seasonal closures of lek viewing areas, and implementing
both permanent and seasonal road closures. With continued
implementation of conservation actions associated with the BSAP (Bi-
State TAC 2012, entire), impacts from recreation are significantly
reduced.
The BSAP (Bi-State TAC 2012, entire) includes measures to counter
effects such as human disturbance to the Bi-State DPS, including
recreation-related impacts. Because we have determined that the
partially completed and future conservation efforts will be implemented
and effective (see Policy for Evaluation of Conservation Efforts When
Making Listing Decisions, below), we believe impacts associated with
recreation are not a concern into the future.

Disease

Sage-grouse are hosts for a variety of parasites and diseases
(Thorne et al. 1982, p. 338; Connelly et al. 2004, pp. 10-4-10-7;
Christiansen and Tate, 2011, p. 114). The disease of greatest concern
to the Bi-State DPS is WNv, which can cause serious impacts to grouse
species, potentially influencing population dynamics (Petersen 2004, p.
46). WNv has spread across North America since 1999 (Marra et al. 2004,
p. 394). It is thought to have caused millions of wild bird deaths
since its introduction, but most WNv mortality goes unnoticed or
unreported (Ward et al. 2006, p. 101; Walker and Naugle 2011, p. 128).
Sage-grouse are considered to have high susceptibility to WNv and high
levels of mortality (Clark et al. 2006, p. 19; McLean 2006, p. 54).
Sage-grouse deaths resulting from WNv have been detected in 10
States--including in the Bi-State area--and in 1 Canadian Province
(Walker and Naugle 2011, pp. 133, 135). Since 2002, mortalities have
been documented annually. Mortality from WNv has been shown to cause
population declines in populations throughout the West (Service 2020,
pp. 106-107). Scientists have expressed concern regarding the potential
for exacerbating WNv persistence and spread due to the proliferation of
surface water features (Friend et al. 2001, p. 298; Zou et al. 2006, p.
1040; Walker et al. 2007b, p. 695; Walker and Naugle 2011, p. 140). WNv
persists on the landscape after it first occurs as an epizootic,
suggesting this virus will remain a long-term issue in affected areas
(McLean 2006, p. 50).
The long-term response of different sage-grouse populations to WNv
infections is expected to vary markedly depending on factors that
influence exposure and susceptibility, such as temperature, land uses,
and sage-grouse population size (Walker and Naugle 2011, p. 140).
Small, isolated, or genetically limited populations are at higher risk
as an infection may reduce population size below a threshold where
recovery is no longer possible, as observed in an extirpated population
in Wyoming (Walker and Naugle 2011, p. 140). Larger populations may be
able to absorb impacts resulting from WNv as long as the quality and
extent of available habitat supports positive population growth (Walker
and Naugle 2011, p. 140). However, impacts from this disease may act in
combination with other stressors resulting in reduction of population
size, bird distribution, or persistence (Walker et al. 2007a, p. 2652).
Small populations, such as the populations within the Bi-State area,
may be at high risk of extirpation simply due to their low population
numbers and the additive mortality WNv causes (Christiansen and Tate,
2011, pp. 125-126).
The documented loss of four sage-grouse to WNv in the Bodie (n=3)
and Desert Creek-Fales (n=1) PMUs (Casazza et al. 2009, p. 45) has
heightened our concerns about the potential impact of this disease in
the Bi-State area. At that time, these disease-caused mortalities
represented only 4 percent of the total sage-grouse mortalities
observed in the Bi-State area, but additional mortality attributed to
predation could have been due in part to disease-weakened individuals.
Mortality caused by disease acts in a density-independent or additive
manner. The fact that it can act independently of habitat and suppress
a population below carrying capacity makes it a concern. Existing and
developing models suggest that the occurrence of WNv is likely to
increase throughout the range of the species, and, based on projected
increases in temperature caused by changes in climate, occurrence in
the Bi-State may also increase (Paz 2015, p. 3).
Based on our current knowledge of the virus, the relatively high
elevations and cold temperatures common in much of the Bi-State area
likely reduce the chance of a DPS-wide outbreak. However, warmer, lower
elevation sites such as portions of the Mount Grant and Desert Creek-
Fales PMUs may be more suitable for outbreaks. The impact on individual
populations from WNv outbreaks may influence the dynamics of the Bi-
State DPS as a whole through the loss of population resiliency and the
associated challenges of recolonizing extirpated sites through natural
emigration.
Climate change may also influence the spread of disease.
Temperature and precipitation both directly influence potential for WNv
transmission (Walker and Naugle 2011, p. 131). In sage-grouse, WNv
outbreaks appear to be most severe in years with higher summer
temperatures (Walker and Naugle 2011, p. 131) and under drought
conditions (Epstein and Defilippo 2001, p. 105). Therefore, current
climate change projections for higher summer temperatures, more
frequent or severe drought, or both make more severe WNv outbreaks
likely in low-elevation sage-grouse habitats where WNv is already

[[Page 18078]]

endemic, and also make WNv outbreaks possible in higher elevation sage-
grouse habitats that have been WNv-free due to relatively cold
conditions.
The development or maintenance of anthropogenic water sources in
the Bi-State area, some of which likely provide suitable conditions for
breeding mosquitoes, potentially increases the likely prevalence of the
virus above that which could be sustained naturally by existing water
bodies such as streams and meadows. To partially ameliorate this
concern, Federal land managers require livestock water troughs to be
emptied when not in use (BLM 2016, p. 11; HTNF 2016, p. 17).
We concluded in the proposed listing rule, and reaffirm here, that
by itself, WNv is not considered a significant impact at this time
because it is currently limited by ambient temperatures that do not
allow consistent vector and virus maturation. However, WNv could be a
concern for the future if predicted temperature increases associated
with climate change result in this threat becoming more consistently
prevalent. No current regulatory mechanisms address the impacts of WNv.
However, with continued implementation of conservation actions (WNv
surveillance and mosquito abatement measures) associated with the BSAP
(Bi-State TAC 2012, entire), the minor or potential impacts from WNv
are reduced to the point that we find disease is not currently
impacting the resiliency of the Bi-State DPS, nor do we expect it to
impact the DPS in the foreseeable future.

Predation

Predation of sage-grouse is the most commonly identified cause of
direct mortality during all life stages (Schroeder et al. 1999, p. 9;
Connelly et al. 2000b, p. 228; Casazza et al. 2009, p. 45; Connelly et
al. 2011a, p. 65). Major predators of adult sage-grouse include several
species of diurnal raptors (especially the golden eagle (Aquila
chrysaetos)), coyotes (Canis latrans), red foxes (Vulpes vulpes), and
bobcats (Lynx rufus) (Hartzler 1974, pp. 532-536; Schroeder et al.
1999, pp. 10-11; Schroeder and Baydack 2001, p. 25; Rowland and Wisdom
2002, p. 14; Hagen 2011, p. 97). Juvenile sage-grouse also are killed
by many raptors as well as common ravens, badgers, red foxes, coyotes
and weasels (Mustela spp.) (Braun 1995, entire; Schroeder et al. 1999,
p. 10). Nest predators include badgers, weasels, coyotes, common
ravens, American crows, and magpies (Pica spp.); sage-grouse eggs have
also been consumed by elk (Cervus canadensis) (Holloran and Anderson
2003, p. 309) and domestic cows (Bovus spp.) (Coates et al. 2008, pp.
425-426; Dinkins et al. 2013, p. 305). However, sage-grouse have co-
evolved with a variety of predators, and their cryptic plumage and
behavioral adaptations have allowed them to persist (Schroeder et al.
1999, p. 10; Coates 2007, p. 69; Coates and Delehanty 2008, p. 635;
Hagen 2011, p. 96). Although many predators consume sage-grouse, none
specialize on the species (Hagen 2011, p. 97). Generalist predators may
still have a significant effect on ground-nesting birds, because unlike
specialist predators, generalist predator numbers are independent of
prey density (Coates 2007, p. 4).
Predation is typically the principal cause of nest loss, which is a
key determinant in sage-grouse population dynamics (Schroeder et al.
1999, p. 15; Taylor et al. 2012, p. 342). Sage-grouse nest depredation
can be total (all eggs destroyed) or partial (one or more eggs
destroyed). However, hens abandon nests in either case (Coates 2007, p.
26). Nest success across the California portion of the Bi-State area is
within the normal range, with some locations even higher than
previously documented (Kolada 2009a, p. 1344; Mathews et al. 2018, p.
54). However, the lowest estimates occur in Long Valley (South Mono
PMU; 21 percent; Kolada 2009a, p. 1344), which is of concern as this is
a core population for the species in the Bi-State area and is also the
population most likely exposed to the greatest amount of nest predators
(Kolada et al. 2009b, p. 1344; Mathews et al. 2018, p. 53). The
negative impact from reduced nesting success in this location is
presumably being offset by other demographic statistics such as chick
or adult survival (Service 2020, p. 116).
A number of factors have been reported to influence the density and
diversity of predators, including agricultural development, landscape
fragmentation, livestock presence, habitat alterations, and human
populations, among others (Service 2020, p. 113). These factors have
the potential to increase predation pressure on all life stages of
sage-grouse by forcing birds to nest in less suitable or marginal
habitats with no cover to shield them, and by increasing travel time
through habitats where they are vulnerable to predation. Where sage-
grouse habitat has been altered, the influx of predators can decrease
annual recruitment into a population (Service 2020, p. 113).
Raven abundance has increased as much as 1,500 percent in some
areas of western North America since the 1960s (Coates and Delhanty
2010, p. 244). Human-made structures in the environment increase the
magnitude of raven predation, particularly in low-canopy cover areas,
by providing ravens with perches and nesting substrate (Braun 1998, pp.
145-146; Coates 2007, p. 155; Bui 2009, p. 2). Reduction in patch size
and diversity of sagebrush habitat, as well as the construction of
fences, power lines, landfills, and other infrastructure (as discussed
in Infrastructure) also are likely to encourage the presence of the
common raven (Coates et al. 2008, p. 426; Bui 2009, p. 4; Howe et al.
2014, p. 41). High sage-grouse nest densities in small patches of
quality habitat (which result from habitat fragmentation or disturbance
associated with the presence of edges, fencerows, or trails) may
increase predation rates by making foraging easier for predators
(Holloran 2005, p. C37).
The presence of ravens is negatively associated with grouse nest
and brood fate (Bui 2009, p. 27; Gibson et al. 2018, pp. 14-15). Raven
abundance was strongly associated with sage-grouse nest failure in
northeastern Nevada, with resultant negative effects on sage-grouse
reproduction; an increase of 1 raven per 10-km (6-mi) survey transect
was associated with a 7.4 percent increase in nest failure (Coates and
Delehanty 2010, p. 243). In the Virginia Mountains (just north of the
Bi-State DPS), ravens were the most common nest predator, accounting
for almost 47 percent of nest depredations (Lockyer et al. 2013, p.
246).
Threats associated with livestock grazing and predation may
interact. In general, all recorded encounters between livestock and
grouse nests resulted in hens flushing from nests (Coates et al. 2008,
p. 462), which could expose the eggs to predation. There is strong
evidence that visual predators like ravens use hen movements to locate
sage-grouse nests (Coates 2007, p. 33); this is a concern for the Bi-
State DPS given that ravens are the primary predators of sage-grouse in
the Bi-State area. Livestock may also trample nests and sagebrush
bushes and seedlings, thereby impacting future sage-grouse food and
cover (Connelly et al. 2004, p. 7-31). Additionally, the odds of common
raven occurrence, a pervasive sage-grouse nest predator, increased by
approximately 46 percent in areas where livestock were present (Coates
et al. 2016a, p. 10). The presence of infrastructure might also
increase the magnitude of predation; increased raven presence may be
attributable to the presence of water developments and associated
perching structures

[[Page 18079]]

(windmills and fences) (Coates et al. 2016a, p. 10).
Predator removal efforts have sometimes shown short-term gains that
may benefit seasonal survival rates, but there is limited support of
these efforts influencing sustainable population growth (Cote and
Sutherland 1997, p. 402; Hagen 2011, p. 9; Leu and Hanser 2011, p. 27;
Dinkins et al. 2016, pp. 54-55; Peebles et al. 2017, p. 475). For
example, raven removal has been shown to have a positive effect on nest
success (Dinkins et al. 2016, p. 54); however, ultimate results on
population growth rates are negligible or not as well understood.
Removal of ravens from an area in northeastern Nevada caused only
short-term reductions in raven populations (less than 1 year) as
apparently transient birds from neighboring sites repopulated the
removal area (Coates 2007, p. 151). Raven removal in one Wyoming study
resulted in a 50 percent reduction in raven densities during 2008-2014,
while non-removal sites saw a 42 percent increase in raven densities
(Peebles et al. 2017, p. 476). The authors reported increases in lek
counts following a 1-year lag during raven removal; however, other
factors were also associated with increased lek counts in this study
that included minimum temperatures and precipitation during the brood-
rearing period.
As specified in the BSAP and associated project spreadsheet (Bi-
State TAC 2012, entire), the participants have worked to reduce threats
to sage-grouse in the Bi-State DPS from predators. Removal of
infrastructure (e.g., landfills, tall structures) may be a crucial step
to reducing the presence of sage-grouse predators (Bui 2009, pp. 36-37;
Leu and Hanser 2011, pp. 270-271). In the Bodie PMU, perching and
nesting sites have been eliminated by infrastructure removal (e.g.,
windmill, transmission line). In the Desert Creek/Fales PMU, 3 km (1.85
mi) of fence in the Sweetwater Summit area was fitted with perch
deterrents. Additionally, nearly 24,281 ha (60,000 ac) of conifer-
encroached sagebrush have been treated in the Bodie, Desert Creek/
Fales, Pine Nut, Mount Grant, and South Mono PMUs to remove conifers
and reduce perch sites for predators.
Overall, predation is currently known to occur throughout the Bi-
State DPS's range. It is facilitated by habitat fragmentation and
composition, infrastructure (fences, power lines, and roads) and other
human activities that may be altering natural population dynamics in
specific areas throughout the Bi-State DPS's range. The impacts of
predation on sage-grouse can increase where habitat quality has been
compromised by anthropogenic activities and ultimately influence
population performance (Coates 2007, pp. 154, 155; Bui 2009, p. 16;
Hagen 2011, p. 100). Landscape fragmentation, habitat degradation, and
human populations have likely increased predator populations through
increasing the ease of securing prey, and through human structures like
landfills adding food sources. Other human structures can provide nest
or den substrates for predator species. Certain sage-grouse populations
are exhibiting deviations in vital rates below those anticipated, and
the deviation may be related to predation. The populations with this
issue are the Long Valley population (South Mono PMU), which is one of
the two largest (core) populations in the Bi-State DPS, as well to the
Desert Creek population (Desert Creek-Fales PMU) and the Pine Nut PMU.
If assuming potential predation is connected to the deviations, the
Bodie and White Mountains PMUs are likely least affected by predation.
At natural levels and in unaltered habitat, it is unlikely that
predation would be a significant impact to the DPS, given that the
sage-grouse have coevolved with a number of predators, and no predators
specialize on sage-grouse. However, we recognize that, in concert with
altered habitat, it may become an increasing concern in the future. As
more habitats face development (including roads, power lines, and other
anthropogenic features such as landfills, airports, and urbanization),
we expect the risk of increased predation to spread, possibly with
negative effects on the sage-grouse population trends. We concluded in
the proposed listing rule, and reaffirm here, that, by itself,
predation is not considered a significant impact at this time. There
are no regulatory mechanisms addressing predation directly, but
regulatory mechanisms and conservation efforts that indirectly
influence predation have continued to be implemented since publication
of the proposed listing rule, including (but not limited to): Removing
and limiting structures that attract predators (e.g., fencing, power
lines), and conducting initial procedures to remove the landfill in
Long Valley. With continued implementation of conservation actions
associated with the BSAP (Bi-State TAC 2012, entire), impacts from
predation are significantly reduced.
The BSAP (Bi-State TAC 2012, entire) includes measures to counter
effects such as predation risks to the Bi-State DPS. Because we have
determined that the partially completed and future conservation efforts
will be implemented and effective (see Policy for Evaluation of
Conservation Efforts When Making Listing Decisions, below), we believe
that predation is not a concern into the future.

Small Population Size and Population Isolation

The Bi-State DPS is relatively small and both geographically and
genetically isolated from the remainder of the greater sage-grouse
distribution. All isolated populations of sage-grouse are more
vulnerable to genetic, demographic, or stochastic events. However,
available data indicate genetic diversity in the Bi-State area is
currently high (Oyler-McCance and Quinn 2011, p. 18). Thus, we
currently have no indication that genetic factors such as inbreeding
depression, hybridization, or loss of genetic diversity are acting on
the Bi-State DPS. However, populations in the Bi-State area have unique
detectable qualities that allow differentiation from one another
(Oyler-McCance et al. 2014, entire; Tebbenkamp 2014, entire). Also, the
Parker Meadows area (a single isolated lek system located in the South
Mono PMU) is experiencing a disproportionately high degree of nest
failures due to nonviable eggs (Gardner 2009, pers. comm.), suggesting
a possible manifestation of genetic challenges; this small breeding
complex has the lowest reported genetic diversity in the Bi-State area
(Oyler-McCance et al. 2014, p. 1304). We do not know if this is caused
by inbreeding depression, loss of genetic diversity, or other factors,
but to address this, a translocation project was developed in
conjunction with the USGS and implemented in 2017. There has been some
initial success in survival of transferred broods (Mathews et al. 2018,
p. 37).
The Bi-State DPS comprises approximately 50 active leks
representing several relatively discrete populations. Fitness and
population size across a variety of taxa are strongly correlated, and
smaller populations are more challenged by environmental and
demographic stochasticity (Keller and Waller 2002, pp. 239-240; Reed
2005, p. 566). These small, isolated populations may face future
genetic challenges. When coupled with mortality stressors related to
human activity and significant fluctuations in annual population size,
long-term persistence of small populations (in general) can be
challenging (Traill et al. 2010, entire). The Pine Nut PMU has the
smallest number of sage-grouse of all Bi-State area PMUs (usually less
than 100

[[Page 18080]]

individuals as observed from data collected between 2003 and 2017,
representing approximately 5 percent of the DPS). However, each
population in the Bi-State DPS is relatively small, as is the entire
DPS on average (estimated at approximately 3,280 individuals).
One way to address population health and viability is through
analysis of effective population size. Effective population size is
defined as the size of the idealized population of breeding adults that
would experience the same rate of loss of heterozygosity, change in the
average inbreeding coefficient, or change in variance in allele
frequency through genetic drift as the actual population (Frankham et
al. 2002, pp. 312-317). As effective population size decreases, the
rate of loss of genetic diversity increases. The consequences of this
loss of genetic diversity, reduced fitness through inbreeding
depression and reduced adaptive (evolutionary) potential, are thought
to elevate extinction risk (Frankham 2005, p. 135). Studies suggest
effective population size should exceed 50 to 100 individuals to avoid
short-term extinction risk caused by inbreeding depression, and
mathematical models suggest that effective population size should
exceed 500 individuals to retain evolutionary potential and avoid long-
term extinction risk (Franklin 1980, entire; Soule 1980, entire). Some
estimates of effective population size have been as high as 5,000
individuals, but these estimates are thought to be highly species
specific and influenced by many extrinsic factors (Lande 1995, p. 789).
Sage-grouse have one of the most polygamous mating systems observed
among birds (Deibert 1995, p. 92). Asymmetrical mate selection (where
only a few of the available members of one sex are selected as mates)
should result in reduced effective population sizes (Deibert 1995, p.
92), meaning the actual amount of genetic material contributed to the
next generation is smaller than predicted by the number of individuals
present in the population. Furthermore, variation in female
reproductive success, fluctuating population size, unequal sex ratios,
the fact that not all males breed each year, and other sage-grouse
characteristics all reduce effective population size (Frankham 1995, p.
796; Aldridge and Brigham 2003, p. 30; Stiver et al. 2008, p. 473; Bush
2009, p. 108). Each of these influencing factors on effective
population size occurs in the Bi-State DPS and suggests population
sizes in sage-grouse must be greater than in non-lekking bird species
to maintain long-term genetic diversity.
The effective population size of a wildlife population is often
much less than its actual size. We are unaware of specific data or
literature that definitively identifies the number of sage-grouse
needed to maintain an effective population size of birds that would
also result in a viable population. However, some literature exists to
help us understand the complexities of answering this question for the
Bi-State DPS or any other region within the range of the greater sage-
grouse. One study concluded that up to 5,000 individual sage-grouse may
be necessary to maintain an effective population size of 500 birds
(Aldridge and Brigham 2003, p. 30). Their estimate was based on
individual male breeding success, variation in reproductive success of
males that do breed, and the death rate of juvenile birds. Similarly, a
meta-analysis based on a wide array of species determined that a
minimum viable population size (actual population size) necessary for
long-term persistence should be on the order of 5,000 adult individuals
(Traill et al. 2010, p. 32), though others have argued a minimum viable
population would be from 2 to 10 times this figure (Franklin and
Frankham 1998, p. 70; Lynch and Lande 1998, p. 72). However, another
analysis countered that there is no single minimum population size
number for all taxa, and that extinction risk depends on a complex
interaction between life-history strategies, environmental context, and
threat (Flather et al. 2011, entire).
Based on data from 2018, the median abundance estimate of the Bi-
State DPS spring breeding population is approximately 3,305 individuals
(95 percent CRI = 2,247-4,683; Coates et al. 2020, p. 26). This
estimate (as well as PMU specific estimates) was derived using the
integrated population model outputs of male abundance based on lek
count and demographic (telemetry) data, as well as by multiple post-hoc
adjustments, given results of ancillary research. Adjustments included
reported distributions for detection probability (Coates et al. in
press, entire), lek attendance probability (Wann et al. 2019, p. 7),
and sex ratio (Hagen et al. 2018, p. 4). Also included was an
adjustment to account for `unknown' leks, based on a 95 percent assumed
known lek value. This value was derived from expert knowledge by
members of the Bi-State Technical Advisory Committee. Using this
estimate and the studies identified above describing effective
population size being on the order of 10 to 20 percent of the actual
population size, in the Bi-State area, the estimated average effective
population size (for the entire Bi-State area in 2018) is approximately
330 to 661 sage-grouse, below the 5,000 individual threshold
recommended by some researchers, but above the 50 individual threshold.
Genetic and radio-telemetry studies, however, indicate that some sage-
grouse populations in the Bi-State area are isolated, suggesting that
the effective population size is actually less (Table 2). Based on
these data, we calculate the effective population size for four
generally discrete populations in the Bi-State (as described in Oyler-
McCance et al. 2014, Figure 4) to provide context surrounding long-term
genetic viability of these units (Table 2).

Table 2--2018 Estimated Population Size and Range of Estimated Effective
Population Size by Genetic Cluster for the Bi-State Area, Nevada and
California
------------------------------------------------------------------------
Estimated median Estimated effective
PMU population size population size
2018 range 2018
------------------------------------------------------------------------
Pine Nut....................... 33 3-6
Desert Creek-Fales, Mount 2,342 234-468
Grant, Bodie..................
Long Valley.................... 818 81-163
White Mountains................ 45 4.5-9
Bi-State DPS................... 3,305 330-661
------------------------------------------------------------------------

Empirical data from Colorado showed the effective population size
in Gunnison sage-grouse to be about 20 percent of actual population
size (Stiver et al. 2008, p. 478). We are unaware of any other
published estimates of

[[Page 18081]]

minimal population sizes necessary to maintain genetic diversity and
long-term population sustainability in sage-grouse and specifically for
the Bi-State DPS, and whether the described effective population sizes
above are of concern. Most populations of the Bi-State DPS have been
below the possible minimum population sizes as described above, in
large part due to the natural cycling of sage-grouse populations, yet
continue to persist.
Small population size and a discontinuous population structure
occur throughout the Bi-State DPS's range, which could make the Bi-
State DPS more vulnerable to impacts of threats described herein both
currently and likely in the future in the absence of any ameliorating
conservation efforts. However, conservation efforts addressing the
threats acting upon these small populations have been implemented since
publication of the proposed listing rule, including (but not limited
to) translocation of sage-grouse into the Parker Meadows subpopulation,
restoring critical brood-rearing habitat areas, and addressing invasive
nonnative and native plants. Because we expect conservation
implementation to continue under the BSAP (Bi-State TAC 2012, entire),
the risks associated with small population size will be reduced.

Summary of Threats

Throughout the threats discussion, we considered individual threats
and, where appropriate, how they interact with other threats. Here, we
consider the threats holistically to determine their impact on the Bi-
State sage-grouse and its habitat.
Currently and into the future, the threats with the highest impact
to the DPS are wildfire and altered fire regimes, and nonnative
invasive and native woodland succession. Threats from urbanization and
habitat conversion; infrastructure; mining; grazing and rangeland
management; climate change; predation, and small population size and
population isolation are also occurring. Threats from recreation and
disease affect only a few individuals a year, and we do not expect that
rate to increase into the foreseeable future. All of these threats are
exacerbated by the population isolation and discontinuous population
structure.
In summarizing the impacts of threats, we also consider impacts of
renewable energy, commercial and recreational hunting, scientific and
educational uses, and contaminants (including pesticides). Though
impacts from these threats are expected to be minimal relative to the
overall condition of the DPS (Service 2020, pp. 63-124), and though we
did not present summary analyses of these threats in this Federal
Register document, we still consider them when evaluating the
cumulative impact of all threats on the DPS.
Small, isolated populations such as those found in the Bi-State
area are more challenged by stochastic events such as disease
epidemics, prey population crashes, or environmental catastrophes.
Interactions between climate change, drought, wildfire, WNv, and the
limited potential to recover from population downturns or extirpations
place significant challenges to the persistence of the Bi-State DPS of
sage-grouse.
One of the most substantial interactions of threats is the cycle
between climate change, cheatgrass, and altered fire regimes. Warmer
temperatures and greater concentrations of atmospheric carbon dioxide
create conditions favorable to cheatgrass, thus continuing the positive
feedback cycle between the invasive annual grass and fire frequency
(Chambers and Pellant 2008, p. 32; Global Climate Change Impacts in the
United States 2009, p. 83; Halofsky et al. 2018, pp. 276-277). Fewer
frost-free days also favor frost-sensitive woodland vegetation, which
facilitates expansion of woodlands into the sagebrush biome, especially
in the southern Great Basin (Neilson et al. 2005, p. 154). Thus,
sagebrush habitats in the Great Basin will likely be lost at more
southerly latitudes and low-elevation sites, and upper elevation areas
will be more susceptible to woodland succession and cheatgrass
invasion. In the Bi-State area, substantial changes in vegetation
communities could occur between 2025 and 2100 (Neilson et al. 2005, p.
155; Bradley 2010, p. 204; Comer et al. 2013, p. 142; Finch 2012, p.
10).
Overall, the cumulative impact of all threats affecting the Bi-
State DPS can be influenced by interactions with co-occurring threats,
resulting in significant impacts to the resiliency, redundancy, and
representation of the DPS as a whole. However, as a result of
conservation actions associated with the 2012 BSAP (Bi-State TAC 2012,
entire), impacts from all threats individually and combined are
generally being reduced from their current levels and will continue to
be reduced even more in the future.

Policy for Evaluation of Conservation Efforts When Making Listing
Decisions

The purpose of PECE (68 FR 15100; March 28, 2003) is to ensure
consistent and adequate evaluation of recently formalized conservation
efforts when making listing decisions. The policy provides guidance on
how to evaluate conservation efforts that have not yet been implemented
or have not yet demonstrated effectiveness. The evaluation focuses on
the certainty that the conservation efforts will be implemented and the
effectiveness of the conservation efforts in making listing a species
unnecessary. The policy presents nine criteria for evaluating the
certainty of implementation and six criteria for evaluating the
certainty of effectiveness for conservation efforts. These criteria are
not considered comprehensive evaluation criteria. The certainty of
implementation and the effectiveness of a formalized conservation
effort may also depend on species-specific, habitat-specific, location-
specific, and effort-specific factors. We consider all appropriate
factors in evaluating formalized conservation efforts. The specific
circumstances will also determine the amount of information necessary
to satisfy these criteria.
To consider that a formalized conservation effort contributes to
forming a basis for not listing a species, or listing a species as
threatened rather than endangered, we must find that the conservation
effort is sufficiently certain to be (1) implemented and (2) effective,
so as to have contributed to the elimination or adequate reduction of
one or more threats to the species identified through section 4(a)(1)
analysis under the Act. The elimination or adequate reduction of
section 4(a)(1) threats may lead to a determination that the species
does not meet the definition of threatened or endangered, or is
threatened rather than endangered.
An agreement or plan may contain numerous conservation efforts, not
all of which are sufficiently certain to be implemented and effective.
Those conservation efforts that are not sufficiently certain to be
implemented and effective cannot contribute to a determination that
listing is unnecessary, or a determination to list as threatened rather
than endangered. Regardless of the adoption of a conservation agreement
or plan, however, if the best available scientific and commercial data
indicate that the species meets the definition of ``endangered
species'' or ``threatened species'' on the day of the listing decision,
then we must proceed with appropriate rulemaking activity under section
4 of the Act. Further, it is important to note that a conservation plan
is not required to have absolute certainty of implementation and
effectiveness in order to contribute to a

[[Page 18082]]

listing determination. Rather, we need to be reasonably certain that
the conservation efforts will be implemented and effective such that
the threats to the species are reduced or eliminated.
Prior to the Bi-State DPS becoming a candidate species in 2010, a
variety of conservation initiatives were put in place to conserve the
DPS and its habitat. The most significant initiative was the creation
of the Nevada Governor's Sage Grouse Conservation Team in June 2002
who, in cooperation with local stakeholders (the Bi-State Local Area
Working Group), developed the first edition of the Greater Sage Grouse
Conservation Plan for the Bi-State area in 2004 (BSLPG 2004, entire) to
begin a cooperative effort to address threats to the Bi-State DPS and
its habitat. The 2004 Action Plan served as the foundation for the
conservation of the Bi-State DPS and its habitat. These efforts were
later enhanced by both local- and national-level conservation
strategies for sage-grouse conservation (including in the Bi-State
area) associated with organizations including the Sage Grouse
Initiative, and the Bi-State LAWG, the latter of which is specifically
focused on Bi-State DPS conservation.
In December 2011, the Bi-State Executive Oversight Committee (EOC)
was formed to leverage collective resources and assemble the best
technical support to achieve long-term conservation of the Bi-State DPS
and its habitat. The EOC comprises resource agency representatives from
the Service, BLM, USFS, NRCS, USGS, NDOW, and CDFW. Recognizing that
conservation efforts were already under way by this point in time, the
EOC directed a Bi-State TAC, comprising technical experts/members from
each agency, to summarize the conservation actions completed since
2004, and to develop a comprehensive set of strategies, objectives, and
actions that would be effective for the long-term conservation of the
Bi-State DPS and its habitat. These strategies, objectives, and actions
comprise the 2012 BSAP (Bi-State TAC 2012, entire), which is actively
being implemented by the signatory agencies identified above, as well
as Mono County, who is committed to implementing all relevant actions
within the County (which harbors the two core populations of the Bi-
State DPS). A majority of the conservation efforts outlined in the BSAP
have already been started or completed (see sections 2.2 and 2.3 of the
Action Plan (Bi-State TAC 2012, pp. 4-13) and the updated project
spreadsheet (Bi-State TAC 2019), and the Past and Ongoing Management
Efforts discussion in the Species Report (Service 2020, pp. 137-144).
Additionally, in February 2013, a Conservation Objectives Team
(COT) of State agencies and Service representatives prepared the
Greater Sage-Grouse (Centrocercus urophasianus) Conservation Objectives
Final Report (COT Report; Service 2013a, entire). This peer-reviewed
report serves as a benchmark, delineating reasonable objectives
necessary for the conservation and survival of greater sage-grouse,
including the Bi-State DPS. The guidance includes management
recommendations for the species and its habitat and establishes
thresholds based on the degree to which threats need to be reduced or
ameliorated to conserve greater sage-grouse so that it would not be in
danger of extinction or likely to become in danger of extinction within
the foreseeable future. Conservation success is expected to be achieved
by removing or reducing threats, such that population trends would
eventually be stable or increasing, even if numbers are not restored to
historical levels. The 2012 BSAP is the main document guiding
implementation of conservation actions, and the COT provides additional
scientific background and guidelines for those actions.
Based on information provided in the 2013 proposed rules and
discussions with the EOC, TAC, and LAWG, signatory agencies in 2014
provided a package of information examining their commitments,
including staffing and funding, to implement the actions needed for
conservation of the Bi-State DPS and its habitat, as outlined in the
BSAP. They also provided an updated prioritization of various
conservation actions and site-specific locations in which to implement
such actions, as needed, based on the Conservation Planning Tool (CPT--
linked, data-driven predictive models and interactive maps that
identify and rank areas for management actions and provide a basis to
evaluate those actions) and the BSAP's Adaptive Management Strategy
(Bi-State EOC 2014, in litt.). The agency commitment letters, which
were one component of the information provided by the EOC (BLM 2014a,
in litt.; CDFW 2014b, in litt.; Mono County 2014, in litt.; NDOW 2014,
in litt.; USDA 2014, in litt.; USGS 2014a, in litt.), outlined many
partially completed or new conservation actions that will be
implemented and completed to address the threats that were identified
in our October 28, 2013, proposed listing rule (78 FR 64358).
The EOC evaluated the [then current] Bi-State DPS survey and trend
information and concluded that their unified and collaborative approach
addresses the conservation needs of the Bi-State DPS (Bi-State EOC
2014, in litt.). Additionally, the EOC concluded that each partner
agency is committed to implementing the BSAP and providing the
necessary resources to do so regardless of the outcome of the Service's
listing decision (Bi-State EOC 2014, in litt.). In the past year,
several agencies have provided updated letters reaffirming their
commitment to the BSAP and the TAC (BLM 2019, in litt.; Mono County
2018, in litt.; NDOW 2018, in litt.; NRCS 2018, in litt.; USFS 2018, in
litt.).
The information provided by the EOC indicates that significant
conservation efforts are currently being implemented and that further
actions are proposed for implementation in the future. These combined
actions address the threats that (synergistically) are resulting in the
most severe impacts on the DPS and its habitat now and into the future.
These conservation actions are described in our detailed PECE analysis
(Service 2019, entire).
Using the criteria in our PECE policy (68 FR 15100, March 28,
2003), we evaluated the certainty of implementation (for those measures
not already implemented) and effectiveness of conservation measures in
the BSAP. Below is a summary of our full PECE analysis, which can be
found at http://www.regulations.gov under either Docket No. FWS-R8-ES-
2018-0106 or Docket No. FWS-R8-ES-2018-0107.
The BSAP (Bi-State TAC 2012, entire) was designed to reduce or
ameliorate threats impacting the Bi-State DPS. We have determined that
the conservation efforts in the BSAP meet the PECE criteria with regard
to certainty of implementation because of (but not limited to): (1) The
agency commitments of staffing and significant funding (over $45
million in the period 2015-2024); and (2) continued participation on
the Bi-State EOC, TAC, and LAWG to ensure the most important
conservation efforts are occurring at any given time considering
ongoing research and monitoring that may influence changes in
management strategies, as outlined in the BSAP's Science-based Adaptive
Management Plan and through use of the CPT. Additionally, we have
certainty of implementation by the various agencies for conservation
efforts that address many different impacts. In particular, we have
certainty of implementation for those completed and ongoing
conservation efforts expected to provide the most significant

[[Page 18083]]

conservation value to the Bi-State DPS and its habitat, including
actions (as outlined in the agencies' 2014, 2018, and 2019 commitment
letters and work plans, and the comprehensive project database (Bi-
State TAC 2019)) that:
(1) Protect and restore critical brood-rearing habitat (reduces
impacts from development/habitat conversion, grazing and rangeland
management, and effects resulting from climate change). Lead agencies
under the BSAP implementing conservation actions to reduce these
impacts are NRCS (e.g., conservation easements, riparian/meadow
restoration), USFS (e.g., private-public land exchanges, riparian/
meadow restoration or improvement, grazing management, wild horse
management), BLM (e.g., riparian/meadow restoration, meadow irrigation
and structure repair, racetrack fence removal, wild horse management),
and Mono County (e.g., fencing modification).
(2) Restore habitat impacted by the spread of invasive, nonnative
plants and pinyon-juniper encroachment (reduces impacts from nonnative,
invasive and certain native plants, wildfire, predation, and effects
resulting from climate change). Lead agencies under the BSAP
implementing conservation actions to reduce these impacts are NRCS
(e.g., pinyon-juniper removal), USFS (e.g., pinyon-juniper removal,
riparian/meadow restoration, invasive weed treatments), and BLM (e.g.,
pinyon-juniper removal, riparian/meadow restoration, invasive weed
treatments, wildfire fuel break treatments, fencing removal).
(3) Ensure stable or increasing sage-grouse populations and
population structure to: (a) Prioritize management actions related to
synergistic impacts on already fragmented habitat, such that management
efforts occur in locations that benefit the DPS the most (reducing
impacts such as infrastructure, urbanization, and recreation), and (b)
develop and implement sage-grouse translocation from stable
subpopulations to other small subpopulations that may be experiencing a
high risk of extirpation (reduces impacts from small population size
and population structure). Lead agencies under the BSAP implementing
conservation actions to reduce these impacts are USGS, NDOW, and CDFW.
Actions under way by CDFW include conducting telemetry, research, or
monitoring surveys that inform the CPT of adjustments to the BSAP
conservation strategy that provide the greatest benefit to the DPS or
its habitat (see section 6.5 in the BSAP (Bi-State TAC 2012, pp. 75-76)
and implementing translocation programs from stable subpopulations to
subpopulations that may be at high risk of extinction). Actions under
way by BLM include permanent and seasonal road closures, nesting
habitat seasonal closures, and fencing removal or marking; actions
under way by USFS include permanent and seasonal road closures and
power line removal. Actions under way by Mono County include
coordination with private landowners to encourage reduced
infrastructure and closure and relocation of the Long Valley landfill.
We also note that BLM, USFS, NRCS, and Mono County have provided
specific plans and timetables laying out various conservation efforts
for implementation from 2015 through 2024 (BLM 2014a, in litt.; Mono
County 2014, in litt.; USDA 2014, in litt.), while CDFW, NDOW, and USGS
have provided textual descriptions of their intended actions and
contributions from 2015 through 2024 (CDFW 2014b, in litt.; NDOW 2014,
in litt.; USGS 2014a, in litt.); many agencies sent letters reaffirming
their commitment to the EOC and the TAC (BLM 2019, entire; Mono County
2018, in litt.; NDOW 2018, in litt.; NRCS 2018, in litt.; USFS 2018, in
litt.). Additionally, the collaboration between the Service, BLM, USFS,
NRCS, Mono County, USGS, NDOW, and CDFW requires regular meetings and
involvement from the parties, whether at the level of the Bi-State EOC,
TAC, or LAWG, in order to implement the BSAP fully. These meetings have
occurred regularly since 2014.
We are confident that the conservation efforts (as outlined in the
BSAP, agency commitment letters, and our detailed PECE analysis, as
well as the TAC comprehensive project database) will continue to be
implemented because we have a documented track record of active
participation and implementation by the signatory agencies and
commitments to continue implementation into the future. Conservation
measures, such as pinyon-juniper removal, establishment of conservation
easements for critical brood-rearing habitat, cheatgrass removal,
permanent and seasonal closure of roads near leks, removal and marking
of fencing, and restoration of riparian/meadow habitat have been
completed over the past 15 years, are currently occurring, and have
been prioritized and placed on the agency's implementation schedules
for future implementation. Agencies have committed to remain
participants and continue conservation of the DPS and its habitat. The
BSAP has sufficient methods (science advisors, the CPT, and a Science-
based Adaptive Management Strategy) for determining the type and
location of the most beneficial conservation actions to be implemented,
including continued receipt of new population and threats information
in the future that will guide conservation efforts.
We have determined that the conservation efforts in the BSAP meet
the PECE criteria with regard to certainty of effectiveness to remove
or reduce threats facing the Bi-State DPS because of, but not limited
to, past project effectiveness within the Bi-State area or within
sagebrush habitat areas across the range of the greater sage-grouse,
and documented effective methodologies for addressing the threats
identified as impacting the Bi-State DPS. For example:
(1) Development and Habitat Conversion--Conservation efforts to
reduce development and habitat conversion are anticipated to occur in
critical brood-rearing habitats across five PMUs, including through
conservation easements and land exchanges (see detailed PECE analysis,
Section 3.0). In total, 12,243 ha (30,254 ac) have been entered into
conservation easements or acquired through land purchase or exchange
since 2012 (Bi-State TAC 2018, p. 25). Our analysis of the database and
the agency commitment letters reveals partially completed and future
conservation efforts will occur in the Pine Nut, Bodie, Desert Creek-
Fales, Mt. Grant, and South Mono PMUs, totaling approximately 7,284 ha
(18,000 ac) of lands identified as important for conservation by the
TAC. These efforts have funding obligated and are in various stages of
easement development, with many anticipated to be completed in a few
years (BSAP 2019). Further, an effort to acquire approximately 5,870 ha
(14,500 ac) of lands in the Pine Nut PMU by the Carson City BLM has
been approved and is anticipated to finalize in spring of 2020. These
areas include high-priority targets identified in the BSAP, and are
consistent with the COT Report's ex-urban conservation objective to
limit urban and exurban development in sage-grouse habitats (Service
2013a, p. 50). In total, approximately 31 percent of all private lands
containing suitable sage-grouse habitat across the Bi-State are
enrolled under an easement program or have been acquired by federal and
State agencies and this number is expected to increase to 57 percent
when combining additional efforts that are ongoing and reasonably
likely to occur. Furthermore, these acquisitions represent
approximately 67

[[Page 18084]]

percent of private lands identified as important for conservation of
the species in the 2012 Action Plan. These actions are considered
effective at reducing impacts from development and habitat conversion
because conserving and managing lands in perpetuity are the most
successful tools for permanent protection of critical sage-grouse
habitat (as demonstrated by Pocewicz et al. (2011) in Wyoming).
(2) Grazing and Rangeland Management--Conservation actions under
the BSAP continue to reduce grazing impacts and ensure management of
livestock consistent with the needs of the DPS. This includes 46
projects across the range of the DPS that have been completed since
2012, including (but not limited to): Maintaining, improving, or
restoring riparian/meadow sites impacted by grazing animals across
multiple PMUs, improving BLM grazing allotment permit terms and
conditions to protect riparian areas, and reducing the risk of
overgrazing that can facilitate the dominance of cheatgrass in upland
habitats (Bi-State TAC 2019, in litt.). An additional 32 projects
focused on maintaining area closures to permitted livestock, monitoring
compliance with permitted terms and conditions, maintenance of ``let-
down'' fencing, and meadow irrigation have also been conducted on an
annual and ongoing basis since 2012. The conservation efforts database
identifies seven projects that are either in progress or not yet
started, including new grazing permit processing and the restoration of
degraded sagebrush and meadow habitat at several sites in the Desert-
Creek Fales, Bodie, and Mount Grant PMUs (Bi-State TAC 2019, in litt.).
Additionally, the BSAP identifies a specific strategy (MER6) to address
grazing issues related to wild horse populations, which are known to
negatively impact meadows and brood-rearing habitats used by the Bi-
State DPS (Bi-State TAC 2012, p. 92).
The effectiveness of these grazing and rangeland management
conservation efforts are confirmed by published literature (Boyd et al.
2014, entire; Stevens et al. 2012, p. 301; Davies et al. 2011, pp.
2575-2576; Pyke 2011, p. 537), which articulate the value of
maintaining functional working landscapes that include grazing
activities with site-specific management as necessary (e.g., restoring
meadows to improve sage-grouse brood-rearing habitat) to ensure
longevity of sagebrush ecosystems and the habitat areas deemed most
critical to the Bi-State DPS.
(3) Nonnative Invasive Plants and Native Woodland Succession--
Because both nonnative invasive plants and particularly native woodland
species (pinyon-juniper encroachment) displace the sagebrush ecosystem
necessary for the Bi-State DPS, significant conservation efforts are
being and will continue to be implemented to address these problems.
With regard to nonnative invasive plants, the Bi-State EOC and TAC
recognize that effective control programs can be labor intensive and
costly; however, the Bi-State EOC and TAC believes there is value for
the Bi-State DPS in being strategic in implementing the conservation
efforts that potentially reduce the impact these plants have on the
DPS's habitat (e.g., treating nonnative, invasive plants in strategic
areas to potentially reduce the likelihood of an outbreak or improve a
priority habitat area) (Espinosa 2014, in litt.). Since 2012, chemical
or mechanical treatments of nonnative plant species have occurred on
nearly 526 ha (1,300 ac), and weed monitoring was completed on 858 ha
(2,121 ac) across multiple PMUs (Bi-State TAC 2018, p. 30). Two
projects are currently under way or planned for the future that target
invasive, nonnative plants on more than 243 ha (600 ac) in the Desert
Creek-Fales and Pine Nut PMUs (cheatgrass is considered a high threat
in Pine Nut compared to other PMUs). Additionally, the USFS committed
to control least 40.5 ha (100 ac) of cheatgrass each year from 2015
through 2024 in the Pine Nut PMU (USDA 2014, in litt.). While
combatting invasive annual grasses remains a challenge, the most
effective method to date is through the retention of a healthy native
perennial understory, which is the primary objective of both the TAC
and LAWG (Bi-State TAC 2018, p. 30). Methods of active restoration of
degraded sites can be effective through herbicide or mechanical means
but require additional actions such as reseeding with perennial species
(Frost and Launchbaugh 2003, pp. 43-44; Jones et al. 2015, p. 17).
With regard to pinyon-juniper encroachment, ecologists have
developed clear and effective recommendations to target appropriate
phases of encroachment (specific age and density structure) to ensure
restoration occurs in sagebrush and sage-grouse habitat areas that are
most meaningful (e.g., critical brood-rearing habitat, corridors in
fragmented areas) (e.g., Bates et al. 2011, pp. 476-479; Davies et al.
2011, pp. 2577-2578). Accordingly, BLM, USFS, and NRCS are
strategically targeting phases I and II pinyon-juniper encroachment in
the Bi-State area, which is supported by literature as effective with
careful planning and execution (e.g., Bates et al. 2011, pp. 476-479;
Davies et al. 2011, pp. 2577-2578). As of December 2018, pinyon and
juniper removal has taken place on more than 18,700 ha (46,400 ac)
within or adjacent to sage-grouse habitat, including minor projects to
remove phase I tree encroachment from nesting habitat to more intensive
mechanical removal within both phase I and phase II areas to expand
available sage-grouse habitat and enhance existing conditions within
nesting, brood-rearing, and winter habitats, representing approximately
25 percent of all conifer treatments proposed in the 2012 Action Plan
(Bi-State TAC 2018, p. 27.). Furthermore, conifer treatment maintenance
has been completed on more than 3,000 ha (7,400 ac). Approximately
8,245 ha (20,373 ac) of additional conifer treatments are currently in
progress and have analyses under the National Environmental Policy Act
(NEPA) either completed or under development (Bi-State TAC 2018, in
litt.).
Subsequent to our prior withdrawal of the 2013 proposed listing
rule, several studies have been published that demonstrate the
effectiveness of pinyon-juniper removal across the range of the greater
sage-grouse. These studies have demonstrated that: Sage-grouse readily
nest in conifer treatment sites after trees had been removed (Severson
et al. 2017, p. 53); woodland treatments increased suitable available
breeding habitat and enhanced nest and brood success (Sandford et al.
2017, p. 63); and removal of pinyon-juniper trees encroaching into
sagebrush vegetation communities can increase sage-grouse population
growth through improving juvenile, yearling, and adult survival as well
as improving nest survival (Olsen 2019, pp. 21-22). Additionally, sage-
grouse population growth was 11.2 percent higher in treatment versus
control sites within 5 years of conifer removal (Olsen 2019, pp. 21-
22). Thus, we conclude that pinyon-juniper removal is effective in
restoring areas impacted by woodland succession such that they become
suitable and productive for sage-grouse, reducing the magnitude of the
threat on the species.
(4) Infrastructure--Conservation efforts to reduce infrastructure
are focused on roads, power lines, fencing, and a landfill. Permanent
and seasonal road closures over a minimum of 2,137 miles in the Bodie,
Desert Creek-Fales, Mount Grant, South Mono, and Pine Nut PMUs will
reduce the likelihood of mortality and improve vital rates for sage-
grouse near leks, including nesting and brood-rearing areas. Nearly 22
miles

[[Page 18085]]

of power line and fencing removal projects have occurred in the Bodie,
Pine Nut, and South Mono PMUs, and approximately 141 miles of fencing
have been marked or modified across all PMUS. Some of these projects
require annual maintenance, such as let-down fences, and three projects
that will mark and modify fencing in the Pine Nut, Desert Creek-Fales,
or South Mono PMUs are scheduled to be completed in the future.
Additionally, a landfill in the Long Valley area of the South Mono PMU
is a significant source of predators for one of the two core
populations of the Bi-State DPS; Mono County is undergoing the initial
stages of relocating this landfill (Bi-State TAC 2014, in litt.; Mono
County 2014, in litt.: Mono County 2018, in litt.).
Removing or modifying the types of infrastructure described above
will be effective at reducing the amount of invasive plants present
along or around developed areas (Manier et al. 2014, pp. 167-170),
reducing existing habitat fragmentation and potential vectors for
invasive plants (Gelbard and Belnap 2003, pp. 424-431); removing some
edge effects that can lead to avoidance of nesting in suitable habitat
areas (Aldridge and Boyce 2007, pp. 516-523); reducing or removing
anthropogenic noise that disturbs normal behavior patterns of sage-
grouse (Blickley 2013, pp. 54-65); reducing collision-related
mortalities (associated specifically with fencing) (Stevens et al.
2012, pp. 299-302); and making currently undesirable habitat areas
(that attract predators) favorable by sage-grouse as nest and brood
sites by reducing predator attractants (e.g., power lines, landfill)
(Dinkins et al. 2012, pp. 605-608).
(5) Wildfire--Fires have consumed some important habitat areas
within the range of the Bi-State DPS, primarily within the Pine Nut
PMU, but also recently as a result of the Spring Peak fire within the
Bodie and Mount Grant PMUs and the Boot Fire in the Desert Creek-Fales
PMU (Espinosa 2014, in litt.: Service 2020, p. 26). Site restoration
activities are planned to be implemented following wildfires by
utilizing the CPT to identify sites that are the best candidates for
enhancing or returning sagebrush habitats to conditions that benefit
sage-grouse (Espinosa 2014, in litt.). Restoration efforts will be
tracked for success, noting that some actions (e.g., seeding) vary in
success rate, given variables such as elevation, precipitation, and
site-conditions prior to a fire (Espinosa 2014, in litt.). Recovery of
functional sagebrush habitats following wildfire and restoration
actions can take decades (potentially several sage-grouse generations)
to be realized, and requires monitoring to assure conservation
objectives are met (such as ensuring appropriate levels of sagebrush
and native herbs are established, and reducing nonnative plant
dominance) (Arkle et al. 2014, p. 17). Additionally, the Bi-State TAC
currently utilizes the CPT and field reconnaissance to maximize the
likelihood of enhancing the desired sagebrush community composition
post-fuels reduction treatment activities (Espinosa 2014, in litt.). As
of December 2018, restoration following wildfire has resulted in fire
rehabilitation treatments on more than 7,690 ha (19,000 ac) (Bi-State
TAC 2018, in litt.).
(6) Small Population Size and Population Structure--The BSAP
specifically identifies a strategy (MER7) to address small population
size issues in the Bi-State area, by identifying potential sage-grouse
population augmentation and reintroduction sites, developing
translocation guidelines, and potentially implementing augmentation and
reintroduction efforts (Bi-State TAC 2012, p. 93). Specific actions
include developing contingency plans for the Parker Meadows and Gaspipe
Spring subpopulations in the South Mono PMU, and populations in the
Pine Nut PMU; and evaluating the need for augmentation for the Fales
population of the Desert Creek-Fales PMU, the Powell Mountain area of
the Mount Grant PMU, the McBride Flat/Sagehen Spring area in the Truman
Meadows portion of the White Mountains PMU, and Coyote Flat of the
South Mono PMU.
In 2016, CDFW began implementing a plan to translocate sage-grouse
from stable subpopulations in the Bi-State area to the Parker Meadows
subpopulation in the South Mono PMU (Bi-State TAC 2014, in litt.; CDFW
2014b, in litt.; Mathews et al. 2018, pp. 14-34). Prior to initiating
this effort, members of the Bi-State TAC conducted a site visit to
assess habitat condition and conducted removal of conifer trees that
had become established in proximity to the lek and brood-rearing
meadow. Preliminary results suggest that translocated birds are
increasingly remaining in the Parker Meadows area. Additionally,
probability of nest initiation and nest success have increased, brood
success is on par with the remainder of the DPS, and lek counts have
increased over the past two years (Bi-State TAC 2018, pp. 13-14;
Mathews et al. 2018, pp. 28-34). Efforts on this current action are
directly relevant to future conservation efforts for other unstable
subpopulations. It is reasonable to assume future translocations in the
Bi-State area have a high likelihood of effectiveness given continued
careful consideration to all the variables (including translocation
that would occur concurrent with other threat reduction activities,
such as conifer removal or predator control), and published literature
that also indicates success of translocated sage-grouse when successful
translocation methodology is followed (Musil et al. 1993, pp. 89-90;
Reese and Connelly 1997, pp. 239-240; Hennefer 2007, pp. 33-37; Baxter
et al. 2008, pp. 184-185).
For details of additional conservation efforts related to effects
associated with climate change, disease, predation, and other threats,
please see the full PECE analysis (Service 2019, entire).
We will have an ongoing role in monitoring the implementation and
effectiveness of the partially completed and future conservation
efforts given our regular participation with the Bi-State EOC, TAC, and
LAWG, participation in providing updated versions of the BSAP, and by
reviewing any monitoring and research reports. We are satisfied that
the conservation efforts evaluated will be effective in reducing
threats to the Bi-State DPS and its habitat; however, to do so, they do
not need to be applied on every acre of suitable and unsuitable sage-
grouse habitat. For instance, not all of the native pinyon-juniper
vegetation needs to be removed, such as in areas within the range of
the Bi-State DPS where pinyon-juniper historically occurred. Rather the
effort needs, and is expected, to be implemented in areas that are most
likely to support sage-grouse (post-removal) and critical areas that
address habitat fragmentation or reduced-connectivity issues. These
efforts need to occur at a rate that significantly reduces further
habitat losses, which is consistent with the objective to address
pinyon-juniper expansion provided in the March 22, 2013, COT Report for
conservation of the greater sage-grouse (Service 2013a, pp. 47-48),
including the Bi-State DPS.
We have determined that the agencies' resource commitments (e.g.,
staffing and funding, including more than $45 million from 2015 through
2024), and a demonstrated record of implementation will ensure
continued conservation of habitat for the Bi-State DPS. The BSAP has
sufficient monitoring and reporting requirements to ensure that the
proposed future conservation measures are implemented as planned and
are effective at removing threats to the DPS and its habitat. The
collaboration between the Service, BLM, USFS, NRCS, Mono County, USGS,
and

[[Page 18086]]

the States of Nevada and California requires regular team meetings (Bi-
State EOC, TAC, and EOC), and continued involvement of all parties will
occur (Bi-State EOC 2014, in litt.) in order to implement the BSAP
fully. We find that the future conservation efforts in the BSAP meet
the PECE criteria for certainty of implementation and effectiveness,
and can be considered as part of the basis for our final listing
determination for the Bi-State DPS.
In conclusion, we find that the conservation efforts in the BSAP,
and as outlined in the agencies' 2014, 2018, and 2019 commitment
letters, meet the PECE criteria with regard to certainty of
implementation (for those measures not already implemented) and
effectiveness and can be considered as part of the basis for our
listing determination for the Bi-State DPS. Our full analysis of the
2012 BSAP, and additional materials submitted to the Service as
mentioned above, pursuant to PECE can be found at http://www.regulations.gov under either Docket No. FWS-R8-ES-2018-0106 or
Docket No. FWS-R8-ES-2018-0107.

Summary of Comments and Recommendations

As discussed above in Previous Federal Actions, the Bi-State DPS of
the greater sage-grouse has a long and complex listing history. This
has included multiple public comment periods since the proposed rules
were published on October 28, 2013 (78 FR 64328, 78 FR 64358). In the
period 2013-2015, we published five documents announcing to the public
new comment periods, extensions to the comment periods, new information
that became available, and a 6-month extension of making the final
listing determination (78 FR 77087, December 20, 2013; 79 FR 19314,
April 8, 2014; 79 FR 26684, May 9, 2014; 79 FR 31901, June 3, 2014; and
79 FR 45420, August 5, 2014). We held one public hearing in Minden,
Nevada, on May 28, 2014, and one public hearing held in Bishop,
California, on May 29, 2014. Newspaper notices inviting general public
comment and advertisement of the information and public hearings was
published in The Inyo Register, The Record Courier, and the Reno-
Gazette Journal.
When we reinstated the proposed listing rule on April 11, 2019, we
reopened the comment period for 60 days (84 FR 14909); the comment
period opened on April 12, 2019, and closed on June 11, 2019. When we
announced the 6-month extension on October 1, 2019 (84 FR 52058), we
reopened the public comment period for an additional 30 days; the
comment period closed on October 31, 2019. In all comment periods, we
also contacted appropriate Federal and State agencies, Tribes,
scientific experts and organizations, and other interested parties and
invited them to comment on the proposal. We did not receive any
requests for further public hearings.
Between 2013 and 2015, we received more than 6,400 public comments
on the proposed rules. In 2019, we have received more than 2,600 public
comments in response to the reinstatement of the proposed rules and the
6-month extension. Submitted comments were both for and against listing
the species. All substantive information provided during the comment
periods and relevant to this finding has either been incorporated
directly into this withdrawal or is addressed below. For additional
responses to comments for which there is no updated information since
2015, please see the previous withdrawal of the proposed listing rule
published on April 23, 2015 (80 FR 22828).
We also received a few comments related to the proposed 4(d) rule,
and more than 200 comment letters both in support of and opposition to
the proposed critical habitat designation; however, given the decision
to withdraw the listing proposal, no further assessment of the proposed
4(d) rule and critical habitat designation is necessary at this time.
(1) Comment: Several commenters inquired as to how the BLM RMPs,
USFS LRMPs, the BSAP, and the plans developed by the LADWP are used in
our evaluation of existing regulatory mechanisms. Commenters also
questioned the effectiveness of these plans and of the effectiveness of
regulatory mechanisms in general. Other commenters suggested that
existing regulatory mechanisms are adequate.
Our Response: Existing regulatory mechanisms that could provide
some protection for greater sage-grouse in the Bi-State area include:
(1) Local land use laws, processes, and ordinances; (2) State laws and
regulations; and (3) Federal laws and regulations. Regulatory
mechanisms, if they exist, may preclude the need for listing if such
mechanisms are judged to adequately address the threats to the species
such that listing is not warranted. Conversely, threats on the
landscape continue to affect the species and may be exacerbated when
not addressed by existing regulatory mechanisms, or when the existing
mechanisms are not adequate (or not adequately implemented or
enforced).
We use an inherently qualitative approach to evaluate existing
regulatory mechanisms when conducting a threats analysis for a proposed
listing. In general, this means that we assess language in an existing
mechanism/plan as well as any pertinent decisions instituted based on
that language (track record) and evaluate it against the best available
science informing species conservation. For the local land use
regulatory mechanisms, the regulations in some counties identify the
need for natural resource conservation and in some instances (such as
Mono County) attempt to minimize impacts of development through zoning
restrictions. To our knowledge, however, none preclude development, nor
do they provide for monitoring of the loss of sage-grouse habitats.
Similarly, State laws and regulations are general in nature and provide
flexibility in implementation, and do not provide specific direction to
State wildlife agencies, although they can occasionally afford
regulatory authority over habitat preservation (e.g., creation of
habitat easements and land acquisitions).
With respect to Federal laws, we note that recent LRMP and RMP
amendments adopted by the Humboldt-Toiyabe and Inyo National Forests
and BLM's Carson City District and Tonopah Field Office in the Bi-State
area appear to offer significant improved certainty toward sage-grouse
conservation. These changes in conjunction with existing RMPs and
LRMPs, with demonstrated track records of effectiveness (such as the
BLM Bishop Field Office's RMP), supports a conclusion that currently
existing Federal regulations are effective regulatory mechanisms.
Federally managed lands account for approximately 89 percent of the Bi-
State DPS habitat. Additionally, we note that recent changes to RMPs
and LRMPs associated with greater sage-grouse conservation across its
range in the western United States do not apply to the Bi-State DPS.
For additional detail see the Existing Regulatory Mechanisms section in
the 2019 Species Report.
Since the proposed rule, we received additional information on
Federal regulatory mechanisms. Jointly, the Humboldt-Toiyabe National
Forest and the Carson City and Tonopah Offices of the BLM have
developed new Land Use Plan Amendments (HTNF 2016, entire; BLM 2016,
entire). The amendments more fully address conservation of the Bi-State
area by providing specific direction to management of the DPS and its
habitat, including (but not limited to) direct effects (such as land
disturbance) and indirect effects (such as noise) caused by management
of: Recreation, grazing, weeds, wild horses and burros, minerals, fire
management, and rights-

[[Page 18087]]

of-way. Furthermore in 2019, the Inyo National Forest completed a
revised Land Management Plan, which also improves management
consideration of sage-grouse conservation (USFS 2019, entire). For
additional discussion on existing regulatory mechanisms and our
conservation efforts analysis, see discussions in Summary of Factors
Affecting the Species and the Existing Regulatory Mechanisms and
Conservation Efforts sections in the 2019 Species Report (Service 2020,
pp. 124-147).
Therefore, we conclude that the BLM and USFS Land Use Plan
amendments will limit future additional impacts caused by discretionary
actions, thus greatly enhancing the conservation afforded to the Bi-
State DPS and its habitat.
The 2012 BSAP is not a regulatory mechanism. As such, we have
evaluated it through our PECE policy, as described in Policy for
Evaluation of Conservation Efforts When Making Listing Decisions,
above. Since we have concluded that it is sufficiently certain to be
both implemented and effective, we have considered how the measures
included in the plan are ameliorating the magnitude of threats. The
LADWP plans are also not regulatory mechanisms, and we have evaluated
them as an existing and ongoing conservation measure.
(2) Comment: Several commenters stated that conservation efforts to
date have not been adequate, as threats remain on the landscape.
Our Response: While considerable effort has been expended over the
past several years to address some of the known threats throughout
portions or all of the Bi-State DPS's estimated occupied range, threats
to the continued viability of the DPS into the future remain. The
development of the 2012 BSAP (Bi-State TAC 2012, entire) has
highlighted the importance of not only habitat restoration and
enhancement but also the role of the States and other partners in
reducing many of the known threats to the Bi-State DPS. Cooperative,
committed efforts by Federal and State agencies, as well as Mono County
will result in full implementation of the 2012 BSAP, including funding
and staffing commitments from 2015 through 2024 to address the most
significant impacts to the DPS and its habitat (BLM 2014a, in litt.;
BLM 2019, in litt.; CDFW 2014b, in litt.; Mono County 2014, in litt.;
Mono County 2018, in litt.; NDOW 2014, in litt.; NDOW 2018, in litt.;
NRCS 2018, in litt.; USDA 2014, in litt.; USFS 2018, in litt.; USGS
2014a, in litt.). Such plans will help provide the ongoing, targeted
implementation of effective conservation actions that are essential for
the conservation of the Bi-State DPS and its habitat into the future.
We discuss the various conservation efforts occurring currently and
into the future within the estimated occupied range of the Bi-State DPS
of greater sage-grouse in more detail in the detailed PECE analysis
(Service 2019, entire) under Policy for Evaluation of Conservation
Efforts When Making Listing Decisions.
(3) Comment: A few commenters suggest that the Bi-State DPS is not
a genetically unique subspecies or that it does not meet our standard
for recognition as a DPS.
Our Response: In our 12-month finding on petitions to list three
entities of sage-grouse (75 FR 13910, March 23, 2010), we found that
the Bi-State population of sage-grouse meets our criteria as a DPS of
the greater sage-grouse under Service policy (61 FR 4722, February 7,
1996). This determination was based principally on genetic information,
where the DPS was found to be both markedly separated and significant
to the remainder of the sage-grouse taxon. The Bi-State DPS defines the
far southwestern limit of the species' range along the border of
eastern California and western Nevada (Stiver et al. 2006, pp. 1-11).
Sage-grouse in the Bi-State area contain a large number of unique
genetic haplotypes not found elsewhere within the range of the species
(Benedict et al. 2003, p. 306; Oyler-McCance et al. 2005, p. 1300;
Oyler-McCance and Quinn 2011, p. 92, Oyler-McCance et al. 2014, p. 7).
The genetic diversity present in the Bi-State area population is
comparable to other populations, suggesting that the differences are
not due to a genetic bottleneck or founder event (Oyler-McCance and
Quinn 2011, p. 91; Oyler-McCance et al. 2014, p. 8). These studies
provide evidence that the present genetic uniqueness exhibited by Bi-
State area sage-grouse developed over thousands and perhaps tens of
thousands of years, hence, prior to the Euro-American settlement
(Benedict et al. 2003, p. 308; Oyler-McCance et al. 2005, p. 1307;
Oyler-McCance et al. 2014, p. 9). The available genetic information
demonstrates that the Bi-State sage-grouse are both discrete from other
greater sage-grouse populations and are genetically unique. Therefore,
we believe the best scientific and commercial data available continues
to clearly demonstrate that the Bi-State sage-grouse meet both the
discreteness and significance criteria to be designated as a distinct
population segment.
(4) Comment: Several commenters stated that the 2013 proposed
listing rule dismissed past conservation measures without fairly
addressing their breadth, effectiveness, and chance of success.
Further, they submit that the Service must evaluate the conservation
measures through (at minimum) an analysis consistent with PECE and must
fully consider how conservation measures will reduce or remove threats.
The commenters believe that a fair evaluation of the past conservation
efforts would demonstrate that they are sufficient to protect the Bi-
State DPS.
Alternatively, several commenters argue that past conservation
efforts, while well-intended, have been inadequate to provide
sufficient conservation for the DPS. Further, the commenters contend
that the 2012 BSAP is voluntary in nature and does not meet the PECE
standard, and that populations have continued to decline since the
implementation of the BSAP.
Our Response: In this finding, we acknowledge and commend the
commitment of many partners in implementing numerous conservation
actions within the range of the Bi-State DPS. The PECE policy applies
to formalized conservation efforts that have not yet been implemented
or those that have been implemented but have not yet demonstrated
whether they are effective at the time of listing. Our analysis of all
conservation efforts currently in place and under development for the
future is described in detail above in Policy for Evaluation of
Conservation Efforts When Making Listing Decisions. The effect of
conservation efforts and regulatory mechanisms on the status of a
species is considered under Summary of Biological Status and Threats.
In this document, we considered whether formalized conservation
efforts such as the BSAP are included as part of the baseline through
the analysis of the five listing factors or are appropriate for
consideration under our PECE policy. All participating agencies have
provided letters affirming their commitment to the plan, as well as
funding and implementation schedules (Service 2019, entire). Due to
these and other considerations as outlined in our detailed PECE
analysis, we concluded that the 2012 BSAP is highly certain to be
implemented.
We acknowledge that the most recent population studies show that
some sage-grouse populations in the Bi-State DPS have declined (Coates
et al. 2020, Table 3). However, the Bi-State DPS as a whole is showing
a stable, long-term trend. Conservation measures are in place to
counter negative population growth (such as the Parker Meadows
translocation project). Currently, 53 of

[[Page 18088]]

the 76 high-priority projects have been initiated representing 68
percent of the projects originally identified (Bi-State TAC 2018, p.
3). Twelve projects (17 percent) were evaluated and determined to lie
outside of occupied sage-grouse habitat and were subsequently removed
from the list of priorities. Furthermore, 142 of the 159 identified
actions in the BSAP have been initiated and are in stages of
completion, meaning they are in progress, ongoing, occur annually, or
have been evaluated as part of the planning process (Bi-State TAC 2018,
p. 45; Service 2019, p. 33). Given that these measures are still
ongoing, we do not expect that positive gains from these measures would
yet be reflected in population studies.
Overall, due to many factors as outlined in our detailed PECE
analysis, we concluded that future conservation measures are highly
certain to be effective in ameliorating the threats currently impacting
the Bi-State DPS. Therefore, we find the Bi-State DPS is not in danger
of becoming extinct throughout all or a significant portion of its
range, and is not likely to become endangered within the foreseeable
future (threatened), throughout all or a significant portion of its
range, and we are withdrawing the proposed listing, 4(d), and critical
habitat rules for the Bi-State DPS (see Determination of Status for the
Bi-State DPS below).
(5) Comment: Numerous commenters suggested that predators are a
significant threat and that we did not account for this impact
accurately. Further, many commenters suggested predator removal
programs should be implemented. Alternatively, several commenters
suggested that predator control is not sustainable and may have
negative and unintended consequences.
Our Response: As discussed in Predation, we recognize that
predation of sage-grouse is the most commonly identified cause of
direct mortality during all life stages. However, we note that sage-
grouse have coevolved with a suite of predators (Schroeder et al. 1999,
pp. 9-10), yet the species has persisted. Thus, this form of mortality
is apparently offset by other aspects of the species life-history under
``normal'' conditions. However, when non-endemic predators are
introduced into a system (one with which the prey species did not
evolve (e.g., domestic cats and dogs)), or when other factors influence
the balance between endemic predator and prey interactions, such that a
predator gains a competitive advantage, predation may overwhelm a prey
species life-history strategy and ultimately influence population
growth and persistence (Braun 1998, pp. 145-146; Holloran 2005, p. 58;
Coates 2007, p. 155; Bui 2009, p. 2; Coates and Delehanty 2010, p. 243;
Howe et al. 2014, p. 41). Therefore, we agree that increases in sage-
grouse predator abundance and predation rates are a concern by
potentially negatively affecting population growth. However, we
maintain that predation is a proximal cause of mortality and increases
in predator abundance and predation rates are ultimately caused by
changes in habitat conditions, which positively influence predator
occurrence or efficiency. See also the Urbanization and Habitat
Conversion, Infrastructure, and Predation sections in the associated
Species Report for a detailed analysis on the impacts of predation
(Service 2020, pp. 39-60, 110-117).
As a point of clarification, we agree that targeted, short-term
predator removal programs may be warranted in instances where habitat
restoration cannot be achieved in a timely manner. In these instances,
predation rates and predator abundance may be artificially high and
high sage-grouse mortality may be a concern. However, data do not
appear to suggest that removal programs are sustainable or that they
result in consistent increases in sage-grouse numbers (Hagen 2011, pp.
98-99). We intend to explore the potential benefits and negative
ramifications caused by predator control through our continued
coordination efforts with the Bi-State TAC and LAWG for continued
conservation of the Bi-State DPS. In 2018, a research project was
initiated to explore the potential benefits gained through predator
management. Specifically, this project targeted nesting common ravens
in Long Valley associated with the local landfill through egg-oiling to
prevent successful egg hatching. While final results will not be known
for several years, preliminary results suggest improved nesting success
of sage-grouse in Long Valley in the spring of 2019.
(6) Comment: Numerous commenters suggested that the degree of
impact we assign to specific threat factors is not accurate and
suggested revisions. Further, several commenters identified an
inconsistency in our proposed listing rule associated with our
assignment of significance level to grazing and rangeland management.
Our Response: The threats analysis and associated discussion of the
degree of impact that is described in the Species Report (2013, 2014,
and 2019 versions), our 2013 proposed listing rule, our 2015 proposed
withdrawal, and this document are based upon the best available
scientific and commercial information. No additional information or
assessments were provided by the commenters to support their claim that
the analysis and conclusions in our proposed listing rule were
inaccurate. However, where applicable in our revised 2019 Species
Report and this document, we have updated our threats analyses based on
new information received since the proposed listing rule published on
October 28, 2013 (78 FR 64358). With regard to potential
inconsistencies in the threats analysis in the proposed rule, we made
corrections to any inconsistencies identified by commenters and as
applicable in both the revised 2019 Species Report and this document.
Specifically, our 2013 proposed listing rule identified livestock
grazing as a significant threat in the summary of threats section but
did not reach this conclusion in the livestock grazing section of the
document. We have corrected that error in this finding.
(7) Comment: One commenter suggested that the potential threat to
sage-grouse posed by fencing can be mitigated. Alternatively, another
commenter stated that fencing is a major threat and expressed concern
that there are no programs in place to require fencing to be removed.
Our Response: We agree that certain practices, such as making
fences more visible to sage-grouse through the use of visual markers or
employing the use of alternative fence designs, such as let-down
fencing, can reduce certain impacts to the Bi-State DPS caused by
fencing, specifically collision. However, we do not anticipate that
these efforts will completely ameliorate the threat of collision. For
example, one study found that marking fences reduced the fence
collision rate during the sage-grouse breeding season by 83 percent
(Stevens et al. 2012, p. 301). Nevertheless, collisions still occurred
at marked fences, especially those in close proximity to spring
breeding sites, suggesting marking alone did not completely resolve the
concern. Furthermore, while direct mortality through collision may be
minimized by these approaches, indirect impacts caused by predation and
other forms of habitat degradation may remain (see the discussion of
impacts due to fences under Infrastructure above and in the 2019
Species Report (Service 2020, pp. 54-57)). Therefore, a combination of
approaches to managing fences and their impacts needs to be applied,
which may include removal. These efforts are currently ongoing in the
Bi-State area (Bi-State TAC 2018, p. 33).
With regard to the comment that fencing may be considered a major
threat, we have described the impacts

[[Page 18089]]

that may occur from fencing based on the best scientific and commercial
information available. We found that fencing impacts are widespread but
generally minor. In addition, management actions are being undertaken
to further ameliorate this threat. For example, approximately 20 km (13
mi) of fencing has been removed or modified in the Bi-State area, and
approximately 101 km (63 mi) of fencing has been marked with visual
flight diverters. Furthermore, the BLM RMP and USFS LRMP amendments
prepared by the Humboldt-Toiyabe and Inyo National Forests, and the
Carson City District and Tonopah Field Office of the BLM, specifically
identify restrictions on new fence installation and removal or marking
of fences already in place within 1.9-3.2 km (1.2-2 mi) of an active
lek.
The removal of fencing throughout all of the Bi-State area is not
feasible. However, consideration of alternative approaches to
traditional fencing would help reduce impacts of fencing to sage-grouse
(for example, use of let-down fence designs), and we will continue to
work with partners to encourage implementation of reduced or
alternative approaches to fencing in areas that are most important to
the Bi-State DPS. Conservation efforts are under way currently and into
the future to reduce fencing impacts in priority areas (e.g., BLM's
removal of racetrack fencing in Bodie PMU, marking or modifying fencing
in Pine Nut and South Mono PMUs) (Bi-State TAC 2018, entire).
(8) Comment: A few commenters suggested woodlands and woodland
expansion is natural and should be left alone. Specifically, commenters
speculated that forest occurrence is a reestablishment of sites that
were harvested during historic mining in the latter part of the 1800s
or that woodlands are naturally occurring. Further, the commenters
suggested that woodland treatments are not effective at positively
influencing sage-grouse population performance.
Our Response: Across the Bi-State area, we estimate that
approximately 40 percent of the historically available sagebrush
habitat has been usurped by woodland succession over the past 150 years
(USGS 2012, unpublished data). As described in the 2019 Species Report
(Service 2020, pp. 73-79) and in Nonnative Invasive Plants and Native
Woodland Succession, the cause of this increase is likely multifaceted
but most certainly includes recovery from past disturbances such as
mining. However, the support for this single mechanism is not apparent.
For example, while there are locations within the Bi-State area where
there are stumps from harvested trees attributable to the mining era,
most locations do not contain evidence of past tree cutting.
Furthermore, genetic evidence suggests that sage-grouse populations
contained within the Bi-State area were historically more connected and
that these connections began to erode relatively recently (Oyler-
McCance et al. 2014, pp. 10-11). This finding suggests that barriers to
movement, such as trees, were less restrictive historically as compared
to today. No additional information was received by the commenter or
others since the proposed listing rule published that would modify our
understanding of this threat. Therefore, based on the best available
information, we conclude that woodland expansion is a significant
threat in the Bi-State area as it has reduced habitat availability and
negatively influenced population connectivity. As a result,
conservation efforts are under way currently and into the future to
reduce potential woodland succession impacts in priority areas (e.g.,
BLM, USFS, and NRCS treatments of phase I and II pinyon-juniper
encroachment in all six PMUs) (phases of pinyon-juniper encroachment
are generally defined by percent tree cover and tree age in the
affected area) (Miller et al. 2008, p. 5; Bi-State TAC 2018, pp. 26-
29).
Ultimately, the cause of woodland encroachment becomes less
relevant in light of its implications as the response to tree presence
by sage-grouse is uniformly negative (Commons et al. 1999, p. 238;
Doherty et al. 2008, p. 187; Freese 2009, pp. 84-85, 89-90; Casazza et
al. 2011, p. 159; Baruch-Mordo et al. 2013, p. 237; Prochazka et al.
2017, p. 46). Therefore, to reduce this impact on the Bi-State DPS and
its habitat, as described in the BSAP, land managers should consider
management of pinyon-juniper encroachment in specific areas that would
most benefit the Bi-State DPS (e.g., lek sites, migration corridors,
and brood-rearing habitat) and that is consistent with our
understanding of a specific site's vegetation potential. The removal of
trees conveys positive benefits to sage-grouse stemming from increased
habitat availability, increased adult and nest survival, and ultimately
overall improved population performance (Coates et al. 2017b, pp. 31-
33; Sandford et al. 2017, p. 63; Severson et al. 2017, p. 53; Prochazka
et al. 2017, p. 46; Olsen 2019, pp. 21-22).
(9) Comment: Several commenters suggest that fire is the most
significant threat to the Bi-State DPS and that post-fire restoration
is difficult. Alternatively, several other commenters suggest that fire
is a natural process and does not constitute a complete loss of habitat
for the Bi-State DPS because sage-grouse will use burned areas.
Our Response: In the Species Report (Service 2020, pp. 79-86) and
in Wildfires and Altered Fire Regime, we address potential habitat
changes that may be related to wildland fires and post-fire restoration
activities. We agree that fire is a natural process on the landscape
within the Bi-State area; however, we also note that we found that the
``too-little'' and ``too-much'' fire scenarios present challenges for
the Bi-State DPS. In other words, in some locations, the lack of fire
has facilitated the expansion of woodlands, especially into montane
shrub communities. In other locations, recent fires have been followed
by invasive-weed establishment facilitating a reoccurring fire cycle
that restricts sagebrush restoration. These scenarios present
challenges for the species. Still, although fires have occurred across
the range of the Bi-State DPS historically and recently, we acknowledge
that a sufficient amount of suitable habitat remains for sage-grouse
use. Some of this remaining suitable habitat is threatened by
additional fire because of adjacent invasive annual plants and woodland
establishment, which can influence the frequency and intensity of
future fire events. Further, impacts to remaining sagebrush habitat may
be exacerbated due to interactions with other threats that are acting
in the Bi-State area (see Summary of Threats). As a result of these
impacts, conservation efforts are under way currently and into the
future to reduce impacts associated with nonnative, invasive plants
(e.g., multiple BLM and USFS invasive weed management treatments in
multiple PMUs), and woodland succession (e.g., BLM, USFS, and NRCS
treatments of phase I and II pinyon-juniper encroachment in all six
PMUs) (Bi-State TAC 2014, in litt.).
Additionally, while short-term (and potentially long-term) impacts
from fire events to sage-grouse are known to occur, including but not
limited to habitat loss and population declines (Beck et al. 2012, p.
452; Knick et al. 2011, p. 233; Wisdom et al. 2011, p. 469), we agree
that some information suggests sage-grouse use of burned habitat. Small
fires may maintain a suitable habitat mosaic by reducing shrub
encroachment and encouraging understory growth. However, without
available nearby sagebrush cover, the broad utility of these sites is
questionable (Woodward 2006, p. 65). For example, sage-grouse using
burned areas were rarely found more than 60 m

[[Page 18090]]

(200 ft) from the edge of the burn and may preferentially use the
burned and unburned edge habitat (Slater 2003, p. 63).
We recognize that fire is natural and the primary disturbance
mechanism in the sagebrush ecosystem. We also recognize that sage-
grouse will selectively utilize portions of burned habitat. However,
the challenge that wildfire presents to the sustainability of the
system remains, especially given the relatively limited and fragmented
suitable sagebrush habitat present in the Bi-State area. Still, land
managers within the range of the Bi-State DPS are currently
implementing and will continue to implement conservation efforts into
the future that are expected to reduce the potential impacts of
wildfire as it relates to nonnative, invasive plants and pinyon-juniper
encroachment (Bi-State TAC 2018, pp. 22-23).
(10) Comment: Several commenters suggested that climate change
poses a significant impact to the Bi-State DPS and its habitat,
including one commenter that stated we underestimated the impact that
climate change and drought may have on the DPS.
Our Response: In the Species Report (Service 2020, pp. 86-94) and
in Climate, we address potential impacts associated with climate
change. We found that projected climate change and its associated
consequences have the potential to affect sage-grouse and sagebrush
habitat in the Bi-State area. The impacts of climate change interact
with other stressors such as disease, invasive species, prey
availability, moisture, vegetation community dynamics, disturbance
regimes, and other habitat degradations and loss that are already
affecting the species (Strzepek et al. 2010, p. 5; Walker and Naugle
2011, entire; Finch 2012, pp. 60, 80; IPCC 2014, p. 60; Ault et al.
2014, p. 7545; Garfin et al. 2014, p. 463; He et al. 2018, pp. 16-17;
Reich et al. 2018, p. 21). In the 2015 withdrawal of our proposed rule,
we concluded that the overall impact of climate change to the Bi-State
DPS at this time is considered moderate. Neither the commenters nor
others provided new information related to climate change that would
result in a change in our analysis. Our conclusion of moderate impact
from climate change may ultimately prove to be conservative, but we
believe this is the most supportable conclusion given the inherent
uncertainties associated with climate modeling, especially prediction
concerning precipitation. Additionally, conservation efforts associated
with the 2012 BSAP (such as grazing exclosures, changes to grazing
management plans, prescribed fires, invasive plant control, mechanical
treatments, and conservation of meadow habitats) are increasing
resiliency such that the magnitude of climate changes impacts will be
reduced into the foreseeable future. If in the future substantial new
information becomes available as to the specific impacts that may be
incurred by the Bi-State DPS associated with climate change, we will
revisit this assessment.
(11) Comment: Several commenters stated that we should have
proposed listing the Bi-State DPS of greater sage-grouse as an
endangered species as opposed to a threatened species.
Our Response: Section 3 of the Act defines an endangered species as
any species that is in danger of extinction throughout all or a
significant portion of its range, and a threatened species as any
species that is likely to become an endangered species within the
foreseeable future throughout all or a significant portion of its
range. With regard to the Bi-State DPS, we have identified a series of
threats across the range of the Bi-State DPS that are resulting in the
present or threatened destruction, modification, or curtailment of its
habitat or range, and other natural or manmade threats affecting the
DPS's continued existence. We have determined that, assuming current
conditions continue into the future, these impacts are such that the
DPS is likely to become an endangered species within the foreseeable
future (i.e., the definition of a threatened species).
Many of these impacts are cumulatively acting upon the Bi-State DPS
and increase the risk of extinction, but not to such a degree that the
DPS is in danger of extinction today (see Determination of Status for
the Bi-State DPS, below). However, after consideration of partially
completed projects and future conservation efforts that we have found
to be highly certain to be implemented and effective (see Policy for
Evaluation of Conservation Efforts When Making Listing Decisions,
above), we conclude the Bi-State DPS is not in danger of becoming
extinct throughout all or a significant portion of its range, and is
not likely to become endangered within the foreseeable future
(threatened), throughout all or a significant portion of its range.
Therefore, the Bi-State DPS of greater sage-grouse does not meet the
definition of a threatened or endangered species, and we are
withdrawing the proposed listing, 4(d), and critical habitat rules for
the Bi-State DPS.
(12) Comment: Some commenters were concerned about the effects of
listing on mining and associated activities conducted under the General
Mining Law of 1872. One commenter suggested that listing did not take
into consideration Federal mining law and recognition of valid existing
rights. Another commenter was concerned that there would be no
assurances that development of a mining claim will result in the
ability to mine it.
Our Response: In the proposed listing rule, we identified mining
and associated activities to be a threat to the Bi-State DPS; however,
today we consider it a less significant impact and one that does not
occur across the entire Bi-State area. On federally managed land
outside of designated wilderness and wilderness study area
(approximately 92 percent of all federal lands (1,629,669 ha or
4,027,000 ac)), new mining may occur pursuant to the Mining Law of 1872
(30 U.S.C. 21 et seq.), which was enacted to promote exploration and
development of domestic mineral resources, as well as the settlement of
the western United States. It permits U.S. citizens and businesses to
prospect hardrock (locatable) minerals and, if a valuable deposit is
found, file a claim giving them the right to use the land for mining
activities and sell the minerals extracted. Gold and other minerals are
frequently mined as locatable minerals subject to the Mining Law of
1872. Federal agencies with jurisdiction over land where mining occurs
will review mining and other actions that they fund, authorize, or
carry out to determine if listed species may be affected in accordance
with section 7 of the Act. Because we are withdrawing our proposed rule
to list the Bi-State DPS and it will not be placed on the list of
federally endangered or threatened species, consultations under section
7 of the Act will not be required specific to the Bi-State DPS.
As discussed above, potential exists for mining operations to
expand both currently and into the future, but the scope of impacts
from existing mining expansion is not considered extensive. We
concluded that, by itself, mining is not currently considered a
significant impact to the Bi-State population, though mining
exploration continues, and mining activity could occur at any time in
the future.
(13) Comment: Several commenters stated that they believe mining is
not a threat to the Bi-State DPS. Alternatively, another commenter
suggested impacts from mining are significant.
Our Response: In the Species Report (Service 2020, pp. 60-63) and
in Mining,

[[Page 18091]]

we address potential impacts associated with mining activities. Sage-
grouse could be impacted directly or indirectly from an increase in
human presence, land use practices, ground shock, noise, dust, reduced
air quality, degradation of water quality and quantity, and changes in
vegetation and topography (Moore and Mills 1977, entire; Brown and
Clayton 2004, p. 2). However, these effects are theoretical, given that
information relating sage-grouse response to mineral developments is
not extensive. Neither the commenters nor others provided new
information related to this threat. While we maintain that it is
reasonable to assume a negative impact from mining on sage-grouse,
based on the current extent and location of mineral developments in the
Bi-State area, we conclude that mining is not considered a significant
impact at this time. Mining is a potential future concern based on its
potential to impact important lek complexes and population
connectivity. It may also create effects that combine with other
threats currently acting on the Bi-State DPS resulting in a higher
degree of negative impact in the future, though not to the extent that
the species will become endangered in the forseeable future. See the
Mining section of the 2019 Species Report for a complete discussion of
the potential effects of mining activities on the Bi-State DPS and its
habitat.
(14) Comment: Numerous commenters suggested that our grazing and
rangeland management assessment in the proposed listing rule is not
accurate and requires additional clarification. Specifically, they
suggested that: (1) Current livestock grazing is compatible with sage-
grouse conservation in the Bi-State area, (2) a more clearly defined
delineation is needed between past and present grazing impacts, and (3)
additional delineation is needed among grazing animals (such as cattle,
horses, sheep). Alternatively, several other commenters suggested that
grazing and rangeland management are a significant threat to the Bi-
State DPS's conservation and that this threat is not adequately
controlled by existing management programs.
Our Response: In the 2019 Species Report (Service 2020, pp. 65-73)
and in Grazing and Rangeland Management, we found that the majority of
sage-grouse habitat in the Bi-State area is not significantly impacted
by livestock grazing. Specifically, RHAs or their equivalents (the
standard used by Federal agencies to assess habitat condition) have
been completed on allotments covering approximately 81 percent of
suitable sage-grouse habitat in the Bi-State area. Of the allotments
with RHAs completed, 81 percent (n=97) are meeting upland vegetation
standards, suggesting that approximately 352,249 ha (870,427 ac) out of
approximately 563,941 ha (1,393,529 ac) of suitable sage-grouse habitat
are known to be in a condition compatible with sagebrush community
maintenance. Furthermore, of the allotments with RHAs completed, 45
percent are meeting riparian standards and 27 percent are not, with the
remainder being unknown or the allotment not containing riparian
habitat. Of those not meeting riparian standards (approximately 15
percent), livestock were a significant or partially significant cause
for the allotment failing to meet identified standards while the
remainders were attributed to other causes such as past mining activity
or road presence. In each instance of an allotment not meeting
standards due to livestock, remedial actions have been taken by the
representative land managing agency (such as changes in intensity,
duration, or season of use by livestock). Furthermore, while we have
information on the class of livestock (i.e., sheep, cattle) associated
with any given allotment, we did not analyze these allotments
independently based on this difference.
While it is true that types of livestock will use vegetation
communities differently, meaning some animals consume more shrubs and
others consume more grasses, RHAs or their equivalents are a measure of
the condition of the allotment against a desired condition, which
includes among other things fish and wildlife habitat condition. Given
that RHAs in the Bi-State area consider suitable sage-grouse habitat
condition as part of their evaluation, including shrub and herbaceous
cover, we consider RHAs as a unit of measure sufficiently fine-scaled
to be informative. Ultimately, based on data contained within RHAs, we
concluded that modern livestock grazing is not a significant impact on
sage-grouse habitat.
We also note that historical impacts from livestock grazing and
impacts caused by feral horses are apparent, but data to assess these
impacts are limited. None of the commenters provided additional data to
assist with this assessment. In total, we believe that historical
impacts (past grazing and other land uses) and impacts from feral horse
use is apparent in local areas, but we consider current management to
be sufficient to address these issues.
(15) Comment: Several commenters provided information pertaining to
population performance and size across the DPS as a whole as well as
for individual Population Management Units.
Our Response: While we appreciate these updates, all of these
comments and the data contained within them have been considered in the
associated 2019 Species Report as well as within this document.
Furthermore, we note that the most recent final results stemming from
the IPM (Coates et al. 2020, entire) are similarly incorporated into
our 2019 Species Report and this document. The data provided by
commenters have either been updated by incorporating more recent data
into the analysis or by making slight alterations to the modelling
approach. Many preliminary research results are presented to the Local
Area Working Group during regularly occurring meetings. These results,
however, are often prone to change as the research is finalized.
Therefore, the numbers presented in the 2019 Species Report and
incorporated into this document represent the most up-to-date finalized
findings and represent the best scientific and commercial data
available.
(16) Comment: At least one commenter questioned the efficacy and
rationale for the currently ongoing translocation effort in the Parker
Meadows subpopulation. The commenter specifically expressed concern
over the potential impact this action may have on the source population
and further questioned whether the habitat in the Parker Meadows area
is sufficiently suitable for the reintroduction.
Our Response: The 2012 Action Plan identified augmentation of the
Parker Meadows subpopulation via translocation as a conservation
action. This effort was identified as a need based on the small size of
the subpopulation, genetic information highlighting relatively low
genetic diversity in the subpopulation, and recent monitoring results
identifying low hatchability of clutches (females were laying eggs but
these eggs were not hatching, suggesting eggs were either going
unfertilized or genetic anomalies were inhibiting some aspect of egg
development). To restore genetic and demographic health to the
subpopulation, birds from outside the subpopulation were captured and
moved to the Parker Meadows site. The overarching intent of this action
was to conserve and enhance connectivity between PMUs, specifically
between the South Mono and Bodie PMUs.
Prior to initiating this effort, members of the Bi-State TAC
conducted a site visit to assess habitat condition. Habitat

[[Page 18092]]

was deemed to be of suitable condition but for the occurrence of a
limited number of conifer trees that had become established in
proximity to the lek and brood-rearing meadow. These trees were removed
prior to the augmentation. In addition, the Bi-State TAC evaluated the
potential impact the source population may incur, due to the removal of
birds, via the IPM. Essentially, the study evaluated how altering adult
female and brood survival for the source population impacted population
performance. The source population was the Bodie PMU, and the results
suggested the removal of birds from this location would not affect
overall population growth within this PMU. We evaluated the potential
impact from this action in the 2019 Species Report, within the
Scientific and Educational Uses section (Service 2020, pp. 101-104).
Ultimately, measuring the success of this translocation effort will
require additional time. Preliminary results suggest that translocated
birds are remaining in the Parker Meadows area at an increasing rate,
probability of nest initiation and nest success have increased, brood
success is on par with the remainder of the DPS, and lek counts have
increased over the past 2 years.
(17) Comment: Several commenters expressed concern over the
estimated effective population size of the DPS as a whole as well as
for specific populations.
Our Response: As discussed in Small Population Size and Population
Isolation, studies suggest effective population size should exceed 50
to 100 individuals to avoid short-term extinction risk caused by
inbreeding depression, and mathematical models suggest that effective
population size should exceed 500 individuals to retain evolutionary
potential and avoid long-term extinction risk (Franklin 1980, entire;
Soule 1980, entire). However, some estimates of an effective population
size necessary to retain evolutionary potential are as high as 5,000
individuals, although these estimates are thought to be highly species
specific and influenced by many extrinsic factors (Lande 1995, p. 789).
The effective population size of the Bi-State DPS in 2018 was between
330 and 661 birds (Table 2; Service 2020, pp. 119-121).
We agree that the size of the populations and the relative degree
of isolation among populations within the Bi-State area is a concern to
species conservation as it can exacerbate the effects of genetic
issues, stochastic events, and other threats to the DPS. However, as
discussed above, the current genetic diversity present in the Bi-State
area population is comparable to other populations, suggesting that the
differences are not due to a genetic bottleneck or founder event
(Oyler-McCance and Quinn 2011, p. 91; Oyler-McCance et al. 2014, p. 8).
The available genetic information demonstrates that the Bi-State sage-
grouse are both discrete from other greater sage-grouse populations and
are genetically unique. Further, a significant impetus of the 2012
Action Plan was to facilitate connectivity among populations across the
DPS. While we remain concerned regarding isolation of these
populations, we believe that effective implementation of the 2012
Action Plan will help alleviate concerns over loss of genetic diversity
or the accumulation of deleterious alleles.
(18) Comment: Several commenters identified new potential threats
to the DPS, which were not apparent at the time of our proposed listing
in 2013. Specifically, these include a potential change to how LADWP
manages their lands in Long Valley, the potential for additional
development within the designated West-wide Energy Corridor, a
potential new hydro-pump storage energy development in the White
Mountains PMU, and the development of a Programmatic Environmental
Impact Statement pertaining to fuel break development in the Great
Basin (PEIS).
Our Response: We appreciate these updates on potential threats and
note that each of these identified new threats has been considered in
the associated 2019 Species Report as well as in this document.
The Record of Decision on the West-wide Energy Corridor was signed
in 2009 by the Secretaries of the Interior and Agriculture. This action
was challenged in court the same year, and a settlement was reached in
2012. One aspect of the settlement was a reevaluation of the corridors
identified in 2009, and the public scoping for this assessment was
reopened in the past year. Thus, we have been aware of this potential
activity for nearly a decade but recognize the renewed interest in its
potential impact to the Bi-State DPS.
A section of these designated corridors passes through the Mount
Grant PMU. This corridor section currently has a high-voltage
transmission line in place, but additional development may take place
assuming the completion of this NEPA action. While we recognize that
additional development may occur and may cause impacts to this
population, we do not have any knowledge of, nor did the commenters
provide, additional data informing the likelihood of future
development. The reevaluation of these corridors is currently ongoing
per the 2012 settlement. This reevaluation may, in fact, result in
revisions to the 2009 corridor proposals. We do not have sufficient
certainty at this time of what the potential impacts of this action may
have on the Mount Grant PMU.
The LADWP is currently evaluating alterations to the amount of
water it has traditionally provided for agricultural use in Long
Valley. This water allocation has most commonly been used to irrigate
portions of Long Valley to benefit forage production for local ranching
operations. An ancillary benefit of this practice has been the
enhancement of sage-grouse brood-rearing habitat. Thus, changes to this
practice could influence the sage-grouse population in Long Valley by
negatively impacting chick survival. To address these type of concerns,
in June of 2019, LADWP sent a letter to the Service reaffirming their
commitment to their 2013 Conservation Strategy (implemented by a
memorandum of understanding with FWS), through which LADWP supports
sage-grouse conservation by, in part, utilizing its water resources to
maintain and improve important habitat for sage-grouse on their lands;
and to continue using a collaborative, science-based, and adaptive
management approach to achieve the best habitat results. Therefore, we
recognize the potential impacts that alteration to water supplies in
Long Valley may have on the local sage-grouse population, but we
consider this to be a manageable stressor, in light of LADWP's
continuing commitment toward Bi-State DPS conservation.
In 2019, an application was submitted to the Federal Energy
Regulatory Commission to build and maintain a new hydro-pump storage
facility within the White Mountains PMU, representing a potentially new
threat to the DPS. However, this application was subsequently
withdrawn. Therefore, the Service does not consider this formerly
proposed facility to be an active threat to the Bi-State DPS.
In 2017, the BLM published a notice of intent to prepare the
development of a Great-Basin-Wide Fuel Break PEIS. The purpose of this
document is to expedite the development, enhancement, maintenance, and
utilization of fuel breaks to prevent or minimize the likelihood of
large-scale wildfire events, which are becoming more prevalent in the
Great Basin. This would be accomplished by establishing strategic fuel
breaks wherein fire fighters could stage and anchor suppression
activities to increase

[[Page 18093]]

quicker suppression response times. We recognize that Bi-State DPS
habitat is included within the scope of the PEIS. Further, we recognize
that fragmentation of habitats through the establishment of fuel breaks
may negatively impact some wildlife species including greater sage-
grouse (Shinneman et al. 2019, pp. 4-7).
There are trade-offs between the effects of habitat lost to fire
and habitat lost or degraded by the establishment of a fuel break.
Because the plan has not yet been prepared, it is difficult to fully
assess its impacts on sagebrush habitat. Still, we anticipated that,
after the PEIS is complete, site-specific NEPA analysis (or possibly
categorical exclusion or determinations of NEPA adequacy analyses) will
still be developed, as the PEIS does not detail the specific locations
where these fuel breaks will be established. Given current direction
provided by Land Use Plans in the Bi-State area, identified ``Best
Management Practices'' outlined in the PEIS, and the existing
collaboration among the EOC, TAC, and LAWG, we contend that future
discussions pertaining to the potential establishment of fuel breaks in
the Bi-State area will be robust and afford substantial deference to
sage-grouse as well as the integrity of the entire sagebrush ecosystem.
Therefore, we do not consider the PEIS to negatively impact the
species, and thus do not consider it in our threats analysis.
(19) Comment: One commenter questioned the feasibility of ongoing
financial commitments provided by the Bi-State EOC toward the
implementation of the 2012 BSAP.
Our Response: The BSAP identifies threats to the conservation of
sage-grouse in the Bi-State area and delineates specific conservation
actions to alleviate those threats. In 2014, the Bi-State EOC pledged
to fund these actions at a value in excess of 45 million dollars over a
10-year timeframe. We recognize that funding commitments provided by
Federal agencies over a 10-year time horizon may appear speculative,
given these agencies typically work with annual funding cycles driven
by the U.S. Congress appropriations process; however, agency managers
still retain substantial discretion to forecast and plan how to utilize
appropriations in a longer term strategy. From 2014 through 2018,
approximately 26 million dollars have already been allocated,
representing approximately 57 percent of pledged funds (Bi-State TAC
2018, p. 35). Furthermore, agency partners in the EOC recently updated
their respective letters of commitment to continue funding for the next
5 years. Given the robust collaborative effort in the Bi-State area in
combination with the realized funding track record over the past 5
years and recent reiterations of commitments for future funding, we
consider the likelihood of future commitments to be high.
(20) Comment: One commenter suggested we should assess human
population density on a county-by-county basis to determine how it
compares to the four people per 1 km\2\ threshold established by
Aldridge et al. (2008).
Our Response: In 2008, Aldridge et al. (2008) published a peer-
reviewed scientific article, which evaluated a number of predictive
variables to compare locations of extant versus extirpated sage-grouse
populations. We note that this correlative study does not imply
causation but is a frequently used approach in wildlife studies and
that this type of approach can be highly informative.
As discussed in Urbanization and Habitat Conversion, in modeling
several measures of human population on greater sage-grouse
persistence, including current population density, historical
population density, and human population growth, the best predictor of
sage-grouse extirpation was human population density in 1950 (Aldridge
et al. 2008, p. 985). This finding suggests that human development has
had long-term impacts on habitat suitability and sage-grouse
persistence. Extirpation was more likely in areas having a moderate
human population density of at least four people per 1 km\2\ (10 people
per 1 mi\2\). Furthermore, increase in human populations from this
moderate level did not infer a greater likelihood of extirpation,
likely because much of the additional growth occurred in areas no
longer suitable for sage-grouse (Aldridge et al. 2008, pp. 991-992).
In the 2019 Species Report, we examined the potential likelihood of
population changes that may influence urbanization and habitat
conversion in the future, by reviewing the most recent U.S. Census
Bureau data (U.S. Census Bureau 2018). We found five of eight counties
in the Bi-State area have documented declines in the estimated number
of people present between 2010 and 2017: Alpine, Mono, and Inyo
Counties in California, and Mineral and Carson City Counties in Nevada.
In addition, all of these counties except Carson City, Nevada, support
substantially fewer than four people per 1 km\2\ (10 people per 1
mi\2\). The remaining three counties in the Bi-State area have seen
human population increases over the past decade, ranging from 2.8
percent for Douglas County, Nevada, and 4.1 percent for Lyon County,
Nevada, to 8.4 percent for Esmerelda County, Nevada (U.S. Census Bureau
2018). While Esmerelda County still contains substantially fewer than
four people per km\2\ (four people per 0.4 mi\2\), both Lyon and
Douglas Counties, Nevada, have from two to six times that population
density.
Although we do not have specific information on possible future
developments from each of these counties with documented human
population increases, we are aware that recent development levels are
reduced as compared to the past. Obviously, this metric can be
informative but potentially misleading or unsatisfying. Frequently,
counties have high- and low-density areas such as cities and towns or
more rural developments. Evaluating the number of people per area does
not capture the true distribution of people across the landscape. So,
while it is reasonable to use the Aldridge et al. (2008) study to
explore similarities or differences among locations, two counties with
the same density of people can have differing levels of effects to
sage-grouse based on the pattern of development.
(21) Comment: One commenter suggested we should invite and
interview Native American tribal partners to share their knowledge of
historical and pre-historical occurrence of sage-grouse in the Bi-State
area.
Our Response: We agree that our Native American partners have a
rich oral and written history in the Bi-State area, and we have been
working with them since 2014 to incorporate their knowledge into the
Bi-State collaboration. The first milestone of this endeavor occurred
in 2016 in the form of a Traditional Ecological Knowledge Summit
intended to engage and learn from the local and more broadly dispersed
Native American Tribes in the Great Basin on sage-grouse history and
conservation and the cultural significance of pinyon pine trees. This
well-attended event presented an opportunity for the dissemination of
traditional knowledge and subsequently led to the establishment of the
Bi-State Traditional Natural Resources Committee. The intent of this
committee is simple, to expand the breadth of the Bi-State
collaboration such that decisions and actions are informed by and take
into consideration Native American concerns and insights. We are
pleased to further expand the Bi-State collaborative through the
participation of Native American tribes and agree that inclusion of
traditional knowledge is an

[[Page 18094]]

imperative. With respect to this listing decision process specifically,
we extended an invitation to Tribal partners to review and comment on
our 2019 Species Report prior to its completion, but we did not receive
any responses.
(22) Comment: One commenter stated that we must consider the best
available science on impacts to sage-grouse wintering habitats and map
Bi-State sage-grouse wintering habitat to assess threats to it.
Further, they stated this is of critical importance because wintering
habitats may be found outside habitats designated on the basis of
breeding and nesting habitats.
Our Response: We concur that an understanding of wintering habitats
is important to conservation and management of the Bi-State DPS. We
further agree that mapping of wintering habitat would be useful to
assess threats. However, we are required to make our determination
based on the best scientific and commercial data available at the time
of our rulemaking, and information on wintering habitats as well as
maps of wintering habitat are not currently available. In preparing
this document, we considered the best scientific and commercial data
available regarding the Bi-State DPS to evaluate their potential status
under the Act. We solicited peer review of our evaluation of the
available data, and our peer reviewers supported our analysis. Science
is a cumulative process, and the body of knowledge is ever-growing. In
light of this, the Service will always take new research into
consideration into future analyses of the Bi-State DPS, but we are
required to publish a final decision on the Bi-State DPS in the Federal
Register by April 1, 2020. If plausible new research supports amendment
or revision of this withdrawal document in the future, the Service will
consider the new information consistent with the Act and our
established work priorities at that time.
(23) Comment: One commenter suggested we should present up-to-date
acreage for private lands covered by conservation easements and provide
descriptions of projects funded by the NRCS.
Our Response: We estimate that, since 2003, approximately 10,415 ha
(25,737 ac) of private land, which may provide suitable habitat for
sage-grouse in the Bi-State DPS, are currently enrolled in various
easement programs. The easements are targeted primarily at development
and water rights and vary in length from 30 years to in perpetuity. The
majority of these easement lands are located in the Bodie PMU, with the
remainder of easements occurring in the Desert Creek-Fales, South Mono,
Pine Nut, and White Mountains PMUs. In addition, we estimate that
approximately 9,737 ha (24,060 ac) of previously private land within
the Bi-State DPS has been acquired by State and Federal agencies over
this same timeframe. In total, approximately 20,153 ha (49,800 ac) of
land, either through conservation easements or acquisitions, has been
substantially protected from urbanization challenges. These acres
represent approximately 31 percent of total private lands containing
mapped sage-grouse habitat across the Bi-State. Furthermore, 12,243 ha
(30,254 ac) of the total 20,153 ha (49,800 ac) of easements and
acquisitions completed since 2003 have been accomplished since the
adoption of the BSAP in 2012. Further, we note that approximately 7,284
ha (18,000 ac) of private lands have funding obligated for conservation
easements, but these transactions are still in progress. An effort to
acquire approximately 5,870 ha (14,500 ac) of lands in the Pine Nut PMU
by the Carson City BLM has been approved and is anticipated to finalize
in spring of 2020.
The NRCS, via the Farm Bill, can fund restoration actions on
private and public lands across the Bi-State DPS. The suite of actions
they can fund is broad, but based on a Conference Report with the
Service in 2010, there are three main types of conservation practice
standards employed: management, vegetative, and structural. Examples of
practices that fall under these three main categories include (but are
not limited to): (1) Prescribed grazing assistance, upland and meadow
management, access management; (2) forest slash management, cover crop,
weed control, seeding; and (3) infrastructure, fish and wildlife
structure, obstruction removal. While a variety of these practices have
been employed in the Bi-State area, in general the preponderance of
NRCS's efforts in the Bi-State area have focused on securing
conservation easements and conifer removal. Since 2010, NRCS has placed
into easement approximately 8,741 ha (21,600 ac) of private lands. In
addition, over this same timeframe, NRCS has funded the removal of
approximately 4,649 ha (11,488 ac) of conifer trees for the benefit of
the species across multiple PMUs.
(24) Comment: Several commenters expressed concern over population
performance in some subpopulations and how this may result in range
contraction of the DPS. Further one commenter submitted that we
evaluate lek count data collected by the States and incorporate it into
population trend analysis.
Our Response: We agree that some of the smaller peripheral
populations experiencing population declines may result in range
contractions in the Bi-State DPS as a whole. A recent analysis
considering data from the past 24 years on four populations found that
some populations in the Bi-State DPS are contracting their habitat use,
with contractions most apparent in the Fales, Long Valley, and Sagehen
populations (Coates et al. 2020, p. 44). Over this same time,
distributional area in the Bodie Hills has increased (Coates et al.
2020, p. 44). Across the entire Bi-State area, these results suggest a
median net loss of 858 ha (2,120 ac) annually. Additionally, recent
changes in distribution (past 11 years) suggests a pattern similar to
those described for the long-term spatial trend analysis.
This short-term analysis also considered additional populations
(Coates et al. 2020, p. 51). These results suggest contractions of
total area for the Desert Creek, Long Valley, Mount Grant, Pine Nut,
Sagehen, and White Mountains populations and expansion in the Bodie
Hills, Fales, and Parker Meadows populations. Similar to the long-term
analysis, the net effect over the 11 years was a loss of total area
occupied over time, which corresponds to a median loss of 2,312 ha
(5,713 ac) annually since 2008 (Coates et al. 2020, p. 51). These
apparent declines in certain populations and habitat use over the
shorter time period was likely influenced by the fact that the DPS is
in the downward portion of their cyclic population growth. We also note
that a significant drought affected this DPS from 2011 to 2015, and
based on our understanding of the drivers behind sage-grouse population
cycles, this drought condition has very likely affected recent
population performance. We will continue to monitor the condition of
these smaller, peripheral populations while working with our partners
to implement beneficial actions from the BSAP.
As part of our assessments of the Bi-State DPS, we request and
review lek count data from NDOW and CDFW. We recognize that this data
can be informative but further acknowledge that these data have
limitations. For example, sage-grouse are known to forgo breeding
activity during years of poor conditions, such as drought. Therefore,
an individual animal may still be present in the population but does
not attend the lek and therefore is not counted. While the data in this
instance may suggest decline, it is misleading. There is support,
however, that over a longer timeframe (8-10 years), lek counts act as a
reasonable index to

[[Page 18095]]

population performance. Modeling these data helps alleviate concerns
over the inherent errors associated with lek counts. Further,
integrating the observations with additional data such as that
collected via telemetry studies makes for a much more robust approach
to understanding population dynamics. Ultimately, we do not dismiss lek
count information, but we contend that incorporating this information
into a more holistic approach--such as the Integrated Population Model
for the Bi-State DPS--is a more informative approach to understanding
population abundance and trend.
(25) Comment: One commenter suggested we review Smith and Beck
(2017) and contends that sagebrush treatments do not benefit greater
sage-grouse and further that pinyon-juniper treatments also disturb
sagebrush habitat, implying pinyon-juniper treatments do not benefit
sage-grouse.
Our Response: We appreciate this information. We agree with the
findings in this report and submit that these results have been
supported by others investigating habitat selection by greater sage-
grouse. While the removal of sagebrush to benefit herbaceous understory
development was a relatively frequent activity in the 1940s to the
1970s (Knick et al. 2011, p. 220), this form of action has been greatly
curtailed in the past two decades. There may still be benefits to this
type of action, and it is still conducted sporadically, but recent
treatment methodology has been to open small gaps in the shrub canopy
to alter the mosaic of the landscape in hopes of improving brood-
rearing habitat. The validity of this treatment approach remains
uncertain, and our understanding of the appropriate sage-grouse habitat
mosaic remains untested.
The intent of pinyon-juniper removal projects is to facilitate
sagebrush community conservation and improve the suitability of a
location for sage-grouse. Sage-grouse avoid tree communities, and their
fitness is impacted by exposure to it. Furthermore, left unmanaged,
trees will ultimately out-compete understory species (shrubs and
herbaceous), resulting in a homogenous forested vegetation condition.
Restoration of the shrub community at this point becomes extremely
challenging. Targeted pinyon-juniper treatments in the Bi-State area
are focused on, what is termed, phase I and phase II encroachment
conditions. Phase I refers generally to conditions where trees are
small (shrub high) with less than 10 percent canopy cover and the shrub
community remains intact. Phase II occurs as the tree canopy cover
increase (10-30 percent), trees increase in size, and the shrub
community begins to decrease in dominance.
Treatments of phase I communities is typically accomplished with
garden pruners and pedestrian locomotion. This type of treatment would
have negligible impact on the shrub community due to disturbance. As
trees begin to increase in size, chainsaws and machinery are employed.
In these instances, disturbance to the shrub community may occur but
specific prescriptions and best management practices are followed to
alleviate this exact concern. Shrub community disturbance in these
instances do not equate to the treatments described by Smith and Beck
(2017), where shrubs were specifically targeted for removal across
large acreages. Finally, the potential short-term and restricted impact
to the shrub community caused by tree removal treatments are outweighed
by the long-term benefit gained through increasing and improving sage-
grouse habitats.
(26) Comment: Several commenters expressed concern that economic
development will be negatively impacted by listing and suggested that
it is necessary for the Service to conduct an analysis of the impacts
that listing a species may have on local economies prior to issuance of
a final rule. Alternatively, one commenter submitted that the local
economy will be positively benefited.
Our Response: Under the Act, the Secretary shall make
determinations whether any species is an endangered species or a
threatened species solely on the basis of the best scientific and
commercial data available. Thus, the Service is not allowed to consider
the economic impact of listing when making determinations whether a
species is an endangered species or a threatened species.

Determination of Status for the Bi-State DPS

Section 4 of the Act (16 U.S.C. 1533) and its implementing
regulations (50 CFR part 424) set forth the procedures for determining
whether a species meets the definition of ``endangered species'' or
``threatened species.'' The Act defines an ``endangered species'' as a
species that is ``in danger of extinction throughout all or a
significant portion of its range,'' and a ``threatened species'' as a
species that is ``likely to become an endangered species within the
foreseeable future throughout all or a significant portion of its
range.'' The Act requires that we determine whether a species meets the
definition of ``endangered species'' or ``threatened species'' because
of any of the following factors: (A) The present or threatened
destruction, modification, or curtailment of its habitat or range; (B)
Overutilization for commercial, recreational, scientific, or
educational purposes; (C) Disease or predation; (D) The inadequacy of
existing regulatory mechanisms; or (E) Other natural or manmade factors
affecting its continued existence. For a more detailed discussion on
the factors considered when determining whether a species meets the
definition of ``endangered species'' or ``threatened species'' and our
analysis on how we determine the foreseeable future in making these
decisions, see Regulatory Framework, above.

Status Throughout All of Its Range

In this document, we reviewed the biological condition of the Bi-
State DPS and its resources, and the influence of those resources on
the species' overall viability and the risks to that viability. We
presented summary evaluations of 11 threats analyzed in the Species
Report: urbanization and habitat conversion (Factor A); infrastructure
(Factor A); mining (Factor A); grazing and rangeland management (Factor
A); nonnative invasive plants and native woodland succession (Factor
A); wildfires and altered fire regime (Factor A); climate change,
including drought (Factor A); recreation (Factor E); disease (Factor
C); predation (Factor C); and small population size and population
isolation (Factor E). We also evaluate the adequacy of existing
regulatory mechanisms (Factor D) in ameliorating the magnitude and
effect of threats. Please see the Species Report (Service 2020, pp. 39-
136) for a more detailed discussion of each threat.
In the Species Report, we also presented our evaluation of four
additional threats: Renewable energy (Factor A), commercial and
recreational hunting (Factor B); scientific and educational uses
(Factor B); and contaminants (including pesticides) (Factor E). In the
species report, we concluded that, although these threats are currently
having some impact on individual sage-grouse and their habitat, their
overall effect now and into the future is expected to be minimal. We
did not present summary analyses of those threats in this document but,
did consider them in Summary of Threats and consider them now as a part
of our determination of status.
When we issued a proposed rule to list the Bi-State DPS in 2013 (78
FR 64358, October 28, 2013), we found that the species was likely to
become endangered in the foreseeable future

[[Page 18096]]

throughout all of its range due to threats associated with native
woodland succession, the wildfire-invasive plant cycle, effects
associated with small population size, and increased fragmentation of
sagebrush habitat in the Bi-State area. Many of these threats remain on
the landscape today. Pinyon-juniper encroachment (Factor A) continues
to alter sagebrush habitat in the Bi-State area. Effects due to
wildfire (Factor A) and nonnative invasive plants (cheatgrass) (Factor
A) also continue to alter and degrade sagebrush habitat. The effects of
drought (Factor A) are exacerbating impacts of wildfire, invasive
plants, and altered wildfire regimes across the Bi-State area. In the
future, climate change (Factor A) will result in warmer temperatures,
altered precipitation regimes, and more frequent droughts. These
changes will likely result in a greater intensity of these other
threats into the foreseeable future. Drought in particular appears to
have a strong influence on population dynamics and population cycling
in the Bi-State DPS (Coates et al. 2020, pp. 27, 29).
Areas across the Bi-State DPS are experiencing combined impacts of
threats from wildfire, invasive species, urbanization (Factor A),
infrastructure effects (Factor A), and recreation (Factor E); these
effects may be exacerbated by population isolation and discontinuous
population structure (Factor E). Regulatory mechanisms (Factor D),
particularly RMPs and land management plans, are helping to ameliorate
some threats across the Bi-State DPS. These plans provide specific
direction for management of the DPS and its habitat, including
decreasing habitat disturbance (direct effects) and noise and other
impacts (indirect effects), through provisions addressing recreation,
grazing, weeds, wild horses, minerals, and fire management.
Impacts associated with Factor B (commercial and recreational
hunting, and scientific and educational uses) are having very minor
effects the Bi-State DPS now, and they are not expected to
substantially increase within the foreseeable future. Predation (Factor
C), particularly by ravens, is impacting the DPS, but not at a
magnitude where resiliency is significantly affected. However, as
habitat degradation and fragmentation continue to increase, the
magnitude of the threat of predation could increase into the future.
The key distinction between now and the 2013 proposed listing rule
is the implementation of the 2012 BSAP, which began implementation in
2014 with the publication of the 2014 EOC report and the letters of
commitment from partner agencies. Ongoing and future conservation
efforts associated with the BSAP are likely to increase habitat
quantity, quality, and connectivity, and enhance resiliency,
redundancy, and representation. Efforts associated with the BSAP will:
(1) Protect and restore critical brood-rearing habitat (reduces
impacts from development/habitat conversion, grazing and rangeland
management, and effects resulting from climate change).
(2) Restore habitat impacted by nonnative, invasive species (e.g.,
cheatgrass) and pinyon-juniper encroachment (reduces impacts from
nonnative, invasive and certain native plants, wildfire, predation, and
effects resulting from climate change).
(3) Improve our understanding of sage-grouse populations,
structure, etc., to: (a) Prioritize management actions related to
synergistic impacts on already fragmented habitat (reduced impacts such
as infrastructure, urbanization, and recreation), such that management
efforts occur in locations that benefit the DPS the most; and (b)
develop and implement sage-grouse translocations from stable
subpopulations to other small subpopulations that may be experiencing a
high risk of extirpation (reduces impacts from small population size
and population structure).
These measures will likely increase the number of sage-grouse and
resiliency of populations throughout the Bi-State DPS. These efforts to
stop and reverse habitat loss and fragmentation will make small
populations of Bi-State sage-grouse less susceptible to the effects of
habitat loss, degradation, and fragmentation. They will expand the
amount of protected habitat in critical brood-rearing habitat areas as
well as restore currently unsuitable habitat in areas utilized for
dispersal and colonization. As a whole, conservation efforts associated
with the BSAP are expected to increase species redundancy and the Bi-
State's ability to withstand future random, stochastic events.
Additionally, in recent years, we have gained increased certainty
of the effectiveness of pinyon-juniper removal on restoring sagebrush
habitat and the use of restored areas by sage-grouse (Sandford et al.
2017, p. 63; Severson et al. 2017, p. 53; Olsen 2019, pp. 21-22).
Further, sage-grouse using restored areas had significantly increased
survival and brood success in treated versus control areas, with
population growth was 11.2 percent higher in treatment than in control
sites within 5 years of conifer removal (Olsen 2019, pp. 21-22).
Recent trend analyses have given us a stronger understanding of the
population dynamics of the Bi-State DPS. The Bi-State DPS appears to be
undergoing population cycling, which is typical of sage-grouse
populations rangewide. The most recent study concluded that the DPS, as
a whole, experiences stable trends over all three time periods studied,
and that in the period 1995-2018, the DPS increased by 2 percent a year
(95 percent CRI = 0.74-1.42) (Coates et al. 2020, p. 25). Although the
Bi-State DPS experienced periods of decline, these declines were offset
by later periods of population growth (Coates et al. 2020, p. 25).
Overall, the modelled probability of extirpation of the Bi-State DPS
over the next 10 years is very low (1.1 percent; Coates et al. 2020,
Table 1). It is important to note that individual population trends of
some populations within PMUs have declined, and areas such as Sagehen
and Parker Meadows (both in the South Mono PMU) have high probabilities
of extirpation over the next 10 years, though the extirpation
probability of the South Mono PMU is only 3.8 percent (Coates et al.
2020, Table 1). Longer-term extirpation probabilities are not available
for all PMUs, but the 30-year probabilities of declining below 50 males
for the North Mono Lake area (the Desert-Creek Fales, Bodie, and Mount
Grant PMUs) and for the South Mono PMU were both 8 percent (Garton et
al 2015, p. 14). Conservation efforts are in place to help offset
declining populations such as the translocation of broods to Parker
Meadows, which has shown some early signs of success. Conservation
measures in other areas, including post-fire restoration, wild horse
gathers, fuel reduction treatment, and pinyon-juniper removal, are
further reducing the magnitude of threats.
Many of the conservation efforts associated with the BSAP have only
been completed in recent years or are in the process of being
completed. As discussed in more detail in our full PECE analysis, 142
of the 159 identified actions in the BSAP have been initiated and are
in stages of completion, meaning they are in progress, ongoing, occur
annually, or have been evaluated as part of the planning process (Bi-
State TAC 2018, p. 45), but have not necessarily been completed. Thus,
the full benefits of the conservation actions may not yet be achieved
or apparent in sage-grouse population growth rates or in probabilities
of extirpation, which are calculated by projecting past trends into the
future. Some positive results are already apparent. For example, the
translocation effort in Parker Meadows began in 2018 and has shown some

[[Page 18097]]

early signs of success in improved reproductive success and
recruitment. Overall, as described in our PECE analysis (Service 2019,
entire), based on studies showing the effectiveness of other
conservation actions (such as pinyon-juniper removal) and on detailed
implementation schedules provided by agencies participating in the
BSAP, we have sufficient certainty that conservation efforts outlined
in the BSAP will be implemented and effective, and will increase the
viability of the species into the future.
The BSAP does not remove or eliminate all threats to the species,
and we expect impacts from cheatgrass, pinyon-juniper encroachment,
altered wildfire regime, and climate change to continue to act on the
species into the foreseeable future. Overall, however, we find that the
BSAP and existing regulatory mechanisms are reducing the level of
threats and increasing population resiliency across the Bi-State DPS.
After evaluating threats to the species and assessing the
cumulative effect of the threats under the section 4(a)(1) factors, we
conclude that, due to the effects of conservation actions as analyzed
under our PECE policy, the threats impacting the Bi-State DPS of the
greater-sage grouse have been greatly reduced. Thus, after assessing
the best available information, we conclude that the Bi-State DPS is
not in danger of extinction throughout all of its range. We, therefore,
proceed with determining whether the Bi-State DPS is likely to become
so within the foreseeable future.
Threats such as wildfire and altered fire regimes, climate change,
nonnative invasive plants and native woodland succession, recreation,
and others are expected to continue or increase into the future. Within
the foreseeable future, we expect the individual and combined impacts
of these threats to continue to increase. In particular, effects
associated with climate change, such as drought, will continue to
degrade habitat supporting the Bi-State DPS. However, as noted above,
actions associated with the BSAP are expected to increase resiliency,
redundancy, and representation of the Bi-State DPS, increasing the
overall viability of the DPS such that they will be able to withstand
the increased magnitude of threats into the foreseeable future. Thus,
after assessing the best available information, we conclude that the
Bi-State DPS is not likely to become in danger of extinction within the
foreseeable future throughout all of its range.

Status Throughout a Significant Portion of Its Range

Under the Act and our implementing regulations, a species may
warrant listing if it is in danger of extinction or likely to become so
within the foreseeable future throughout all or a significant portion
of its range. Having determined that the Bi-State DPS is not in danger
of extinction or likely to become so in the foreseeable future
throughout all of its range, we now consider whether it may be in
danger of extinction or likely to become so within the foreseeable
future in a significant portion of its range. The range of a species
can theoretically be divided into portions in an infinite number of
ways, so we first screen the potential portions of the species' range
to determine if there are any portions that warrant further
consideration. To do the ``screening'' analysis, we ask whether there
are portions of the species' range for which there is substantial
information indicating that: (1) The portion may be significant; and,
(2) the species may be, in that portion, either in danger of extinction
or likely to become so in the foreseeable future. For a particular
portion, if we cannot answer both questions in the affirmative, then
that portion does not warrant further consideration and the species
does not warrant listing because of its status in that portion of its
range. Conversely, we emphasize that answering both of these questions
in the affirmative is not a determination that the species is in danger
of extinction or likely to become so within the foreseeable future
throughout a significant portion of its range--rather, it is a
threshold step to determine whether a more-detailed analysis of the
issue is required.
If we answer these questions in the affirmative, we then conduct a
more thorough analysis to determine whether the portion does indeed
meet both of the ``significant portion of the range'' prongs: (1) The
portion is significant and (2) the species is, in that portion, either
in danger of extinction or likely to become so in the foreseeable
future. Confirmation that a portion does indeed meet one of these
prongs does not create a presumption, prejudgment, or other
determination as to whether the species is an endangered species or
threatened species. Rather, we must then undertake a more detailed
analysis of the other prong to make that determination. Only if the
portion does indeed meet both prongs would the species warrant listing
because of its status in a significant portion of its range.
At both stages in this process--the stage of screening potential
portions to identify any that warrant further consideration, and the
stage of undertaking the more detailed analysis of any portions that do
warrant further consideration--it might be more efficient for us to
address the ``significance'' question or the ``status'' question first.
Our selection of which question to address first for a particular
portion depends on the biology of the species, its range, and the
threats it faces. Regardless of which question we address first, if we
reach a negative answer with respect to the first question that we
address, we do not need to evaluate the second question for that
portion of the species' range.
For the Bi-State DPS, we chose to address the status question
(i.e., identifying portions where the Bi-State DPS may be in danger of
extinction or likely to become so in the foreseeable future) first. To
conduct this screening, we considered whether any of the threats acting
on the DPS are geographically concentrated in any portion of the range
at a biologically meaningful scale. We examined the following threats
throughout the range of the DPS: Urbanization and habitat conversion
(Factor A); infrastructure (Factor A); mining (Factor A); grazing and
rangeland management (Factor A); nonnative invasive plants and native
woodland succession (Factor A); wildfires and altered fire regime
(Factor A); climate change, including drought (Factor A); recreation
(Factor E); disease (Factor C); predation (Factor C); renewable energy
(Factor A), commercial and recreational hunting (Factor B); scientific
and educational uses (Factor B); pesticides and other contaminants
(Factor E), as well as the potential for effects from small population
size (Factor E).
We identified one portion of the Bi-State DPS, essentially the Pine
Nut PMU, that is experiencing a concentration of the following threats:
Urbanization, infrastructure, wildfire (and associated isolation and
fragmentation of populations), cheatgrass, livestock and feral horses,
nonnative woodland succession, and recreation. Although these threats
are not unique to this PMU area, they are acting at a greater intensity
here (e.g., higher risks from cheatgrass invasion created by more
frequent wildfires), either individually or in combination, than
elsewhere in the range. In addition, the PMU's small population size
(usually less than 100 birds), coupled with the information suggesting
this unit has a high projected probability of extirpation over the next
10 years (69.7 percent; Coates et al. 2020, Table 1), leads us to find
that this portion meets

[[Page 18098]]

the screening criteria of whether substantial information exists
indicating the population occurring here may be threatened or
endangered.
We then proceeded to the significance screening question, asking
whether there is substantial information indicating that this portion
of the range (i.e., the Pine Nut PMU) may be significant. As an initial
note, the Service's most recent definition of ``significant'' within
agency policy guidance has been invalidated by court order (see Desert
Survivors v. Dep't of the Interior, No. 16-cv-01165 (N.D. Cal. Aug. 24,
2018). Therefore, for purposes of this analysis the Service is
screening for significant portions of the range by applying any
reasonable definition of ``significant.'' Biological importance/
significance is often considered in terms of resiliency, redundancy, or
representation.
We evaluated the available information about the portion of the DPS
that occupies the Pine Nut PMU in this context, assessing its
significance in terms of these conservation concepts, and determined
the information did not substantially indicate it may be significant.
Sage-grouse in this PMU exhibit similar habitat use and behaviors to
sage-grouse in the remainder of the Bi-State DPS; thus, there is no
unique observable environmental usage or behavioral characteristics
attributable to just this area's population. While unique genetic
characteristics have been documented in the PMU's birds, including
haplotypes not present elsewhere in the DPS, particularly in the
northern portion (Oyler-McCance et al. 2014, pp. 1303, 1308), we note
that each of the five other populations in the DPS also exhibit unique
genetic characteristics and haplotypes. So although there is genetic
differentiation between the Pine Nut PMU and other PMUs, we found no
information indicating that the Pine Nut PMU's genetic characteristics
represent a unique or significant adaptive capacity compared to the
remainder of the DPS.
In addition, the Pine Nut PMU has the smallest number of birds
compared to the other PMUs in the DPS, making up approximately 5% of
the total population (see Table 1 above), and there is very limited
movement of these birds into occupied areas of other PMUs. For the
northern portion of this PMU, which has very few birds and little to no
lek attendance reported in recent years (see the description of the
Pine Nut PMU in Range and Population Estimates above), there has been
no detected movement of birds to other PMUs. There is some movement of
birds between the southern portion of Pine Nut PMU and the Desert
Creek-Fales PMU and the Bodie PMU to the south, but this has involved
only very few birds.
Overall, we found no substantial information that would indicate
the Pine Nut PMU may be significant. While the Pine Nut PMU provides
some contribution to the DPS's overall ability to withstand
catastrophic or stochastic events (redundancy and resiliency,
respectively), and to adapt to changing environmental conditions
(representation), the best scientific and commercial information
available indicates that this contribution is very limited in scope due
to its small population size and isolation from other populations.
Therefore, because we could not answer both screening questions in the
affirmative, we conclude that the Pine Nut PMU portion of the range
does not warrant further consideration as a significant portion of the
range.
In addition to the Pine Nut PMU, we identified another portion of
the DPS, the White Mountains PMU, where the information regarding
projections of extirpation probability suggests the population may be
experiencing a disproportionate response to threats. While the
magnitude of most threats acting in this PMU (e.g., threats associated
with cheatgrass, infrastructure, recreation, grazing, predation, and
drought) are generally lower than the remainder of the range, it also
has a projected high probability of extirpation (75.1 percent; Coates
et al. 2020, Table 1). These projections were calculated from limited
data, as completing surveys was difficult given the area's remoteness
and being at the highest elevation for the Bi-State DPS, and as a
result, the authors note that some leks needed to be omitted from the
analysis due to data quality issues, leks could have been missed, and
the model may underrepresent abundance for that PMU (Coates et al.
2020, p. 36). (Coates et al. 2020, pp. 9, 36). However, though the
model may underrepresent abundance (and thus over represent the
probability of extirpation to some degree), out of an abundance of
caution, we proceeded under the premise that this portion of the range
meets the screening criteria of whether substantial information exists
indicating the population occurring here may be threatened or
endangered.
Subsequently, as with the Pine Nut PMU, we then proceeded to the
significance screening question, asking whether there is substantial
information indicating that this portion of the range (i.e., the White
Mountains PMU) may be significant. As in the Pine Nut PMU, sage-grouse
in the White Mountains PMU exhibit similar habitat use and behaviors to
sage-grouse in the remainder of the Bi-State DPS; thus, there is no
unique observable environmental usage or behavioral characteristics
attributable to just this area's population. In the White Mountains
PMU, unique genetic characteristics have been documented in the PMU's
birds, including haplotypes not present elsewhere in the DPS (Oyler-
McCance et al. 2014, pp. 1304, 1308). However, although there is
genetic differentiation between the White Mountains PMU and other PMUs,
we found no information indicating that the White Mountains PMU's
genetic characteristics represent a unique or significant adaptive
capacity compared to the remainder of the DPS.
Additionally, the White Mountains PMU has relatively few birds
compared to most other PMUs in the DPS. Though exact counts are not
available due to the isolated nature of this PMU, recent surveys have
found only two leks, with between zero and nine males documented per
lek per year (NDOW 2018, unpublished data). Historical evidence
suggests bird densities in this area have always been low (Bi-State
Local Planning Group 2004, p. 108); Service 2020, pp. 31-32).
Additionally, there has been no recent recorded movement of birds into
occupied areas of other PMUs. Though a potential connectivity corridor
exists between populations in the South Mono and White Mountains PMUs,
the vegetation within this corridor has apparently changed due to
woodland succession, and an aerial survey suggests that current
vegetation is not suitable sage-grouse habitat (Bi-State Lek
Surveillance Program 2012, p. 36; Service 2020, pp. 29-30).
Overall, we found no substantial information that would indicate
the White Mountains PMU may be significant. While the White Mountains
PMU provides some contribution to the DPS's overall ability to
withstand catastrophic or stochastic events (redundancy and resiliency,
respectively), and to adapt to changing environmental conditions
(representation), the best scientific and commercial information
available indicates that this contribution is very limited in scope due
to its small population size and isolation from other populations.
Therefore, because we could not answer both screening questions in the
affirmative, we conclude that the White Mountains PMU portion of the
range does not warrant further consideration as a significant portion
of the range.

[[Page 18099]]

Because we did not identify any portions of the Bi-State DPS entity
where: (1) It may be in danger of extinction or likely to become so in
the foreseeable future; and (2) it may be significant, a more thorough
significant portion of the range analysis is not required. Therefore,
we conclude, based on this screening analysis, that no portions warrant
further consideration through a more detailed analysis, and the Bi-
State DPS is not in danger of extinction or likely to become so within
the foreseeable future within a significant portion of its range. Our
approach to analyzing significant portion of the species' range in this
determination is consistent with the courts' holdings in Desert
Survivors v. Department of the Interior, No. 16-cv-01165-JCS, 2018 WL
4053447 (N.D. Cal. Aug. 24, 2018); Center for Biological Diversity v.
Jewell, 248 F. Supp. 3d, 946, 959 (D. Ariz. 2017); and Center for
Biological Diversity v. Everson, 2020 WL 437289 (D.D.C. Jan. 28, 2020).

Determination of Status

Our review of the best scientific and commercial data available
indicates that the Bi-State DPS of greater sage-grouse no longer meets
the definition of a threatened species. Therefore, we are withdrawing
our proposed rule to list the DPS as threatened. Consequently, we are
also withdrawing the associated proposed 4(d) and critical habitat
rules.

References Cited

A complete list of references cited in this rulemaking is available
on the internet at http://www.regulations.gov and upon request from the
Reno Fish and Wildlife Office (see FOR FURTHER INFORMATION CONTACT).

Authors

The primary authors of this document are the staff members of the
U.S. Fish and Wildlife Service's Species Assessment Team and the Reno
Fish and Wildlife Office.

Authority

The authority for this action is the Endangered Species Act of
1973, as amended (16 U.S.C. 1531 et seq.).

Aurelia Skipwith,
Director, U.S. Fish and Wildlife Service.
[FR Doc. 2020-06384 Filed 3-30-20; 8:45 am]
BILLING CODE 4333-15-P