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To be completed in 2002
For more information contact
U.S. Fish and Wildlife Service
Nevada Fish and Wildlife Office
1340 Financial Boulevard
Reno, NV 89502
| Project
Description: |
The Numana Diversion Dam was constructed
in 1971 to divert Truckee River water for agricultural purposes
to the Pyramid Lake Paiute Tribe Reservation. The dam is located
about 12 miles upstream from the Pyramid Lake shoreline. The dam
is a lowhead diversion and includes a fish ladder on the east abutment.
On the opposite side of the river, water is diverted through a headgate
and is filtered through three electrical powered revolving screens.
This screen system is designed to prevent entrainment of adult fish
and debris into the irrigation system, and conveys fish back to
the river via a culvert. The fish ladder and screens were retrofitted
in 1976 to facilitate fish passage. By 2000, the screens were badly
corroded and not functional. |
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Fish screens on the Truckee River, NV |
Corrosion making fish screens inoperable
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| Project Status: |
In 2001, the Service partnered with the Bureau of Reclamation
to assess the integrity of the screens. The structural frameworks
of the screens were found corroded beyond repair and it was recommended
to rebuild the screen system with stainless steel rather than
high carbon steel. Currently, funds have been expended to replace
a hoist, cables, and the trolley framework, and bids are being
circulated to estimate the cost for complete renovation.
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| Benefits: |
Renovating the fish screens will maintain the endangered cui-ui
lakesucker and threatened Lahontan cutthroat trout within 24 miles
of it's native habitat.
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| Partners: |
Bureau of Reclamation and
Pyramid Lake Paiute Tribe. |
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