Virginia Ecological Services
Northeast Region

Dominion Virginia Power Warren County Power Station Low Effect HCP

The Madison Cave isopod is a blind, colorless crustacean known only to exist in the limestone aquifers of the Great Valley of Virginia and West Virginia.Dominion Virginia Power has received an Incidental Take Permit from the U.S. Fish and Wildlife Service to authorize incidental take of the threatened Madison Cave isopod (MCI) that may result from construction of a new natural gas-fired combined-cycle power station in Warren County, Virginia.  The Virginia Field Office and other partners have been working closely with Dominion Virginia Power on ways to avoid impacts to the federally listed threatened Madison Cave Isopod (MCI) during the construction of their new natural gas-fired combined-cycle power station in Warren County, Virginia, and the effort resulted in the development of the Low-effect Habitat Conservation Plan (LEHCP).  The LEHCP outlines measures to minimize and mitigate the effects of the construction on the federally listed threatened Madison Cave isopod. No incidental take is expected to occur during operation of the facility after it is built. Dominion Virginia Power will use state of the art foundation design techniques to minimize the potential effects of construction on the MCI.  They will upgrade the existing stormwater management system and place a conservation easement on a parcel of land that would protect a site where MCI is known to occur. 

Madison Cave isopod fact sheet. (PDF)
Learn more about habitat conservation plans.

Photo Caption: Madison Cave Isopod. Credit: Craig Stihler, West Virginia DNR


Federal Register Vol. 76. No. 162 Monday, August 22, 2011, Notice of receipt of application. (PDF)

Madison Cave Isopod (Antrolana lira) Low-Effect Habitat Conservation Plan (3.5MB PDF)

Warren County Power Station Low-Effect HCP Biological Opinion (2.6MB PDF)

Warren County Power Station Low-Effect HCP Findings (1.8MB PDF)


Project Reviews
Step 1 - Action Area

Step 2 - Official Species List
Step 3 - State Coordination
Step 4 - Suitable Habitat
Step 5 - Critical Habitat
Step 6a - Eagle Nests
Step 6b - Eagle Concentration Areas
Step 7 - Determinations

Step 8 - Project Review Package

Endangered Species

- Species in Virginia
- Species by County/City
- Species Fact Sheets

Critical Habitat
- What is it ?
- Critical Habitat Mapper

Permits & HCPs
- Endangered Species Permits
- Warren Co. Power Station Low Effect HCP

General Info
- Plants and the ESA
- Bald Eagle Information
- Mussel Guidelines
- Northern Long-eared Bat Interim Conference and Planning Guidance (PDF - 1.2MB)

Communication Towers
- Service Guidance on the Siting, Construction, Operation and Decommissioning of Communication Towers

Surveys/Habitat Assessments
- Approved Surveyors (for federally listed species & karst geology in Virginia)
- How to be a Surveyor
- Optimal Survey Times: PLANTS
- How long is an ANIMAL survey valid?
- How long is a PLANT survey valid?
- 2014 Indiana Bat Summer Survey Guidance

Last updated: January 27, 2014
All images by FWS unless otherwise noted.