Pratt Creek Lemhi Back Road Bridge Project
Salmonid Habitat Restoration and Acquisition
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013 17 SA | Snake River | 03/19/2018 | 12/17/2018 | 2017 | Completed | 01/25/2024 | |
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Description
The Pratt Creek Lemhi Back Road Bridge installed a bridge to provide 2.6 miles of unimpaired fish passage. Pratt Creek previously passed through an undersized culvert underneath the county’s Lemhi Back Road. The Pratt Creek Lemhi Back Road Bridge project was implemented by the Lemhi Soil and Water Conservation District in conjunction with the Pratt Creek Channel Rehabilitation project sponsored by Trout Unlimited and funded by PCSRF (project 019 16 SA). The Trout Unlimited project moved the Pratt Creek channel to more closely mimic its historic alignment. The old culvert, which passed Pratt Creek water under the Lemhi Back Road, was too small to pass the higher flows anticipated as a result of numerous irrigation efficiency projects completed upstream, creating a velocity barrier to fish. In addition, the new channel intersected the Old Lemhi Back Road in a different location and required a bridge adequate to pass the anticipated high flows.
Project partners included Trout Unlimited, the Upper Salmon Basin Watershed Program, and Idaho Department of Fish and Game. Match funding was provided by the Bonneville Power Administration and non-match funding was provided by a US Fish and Wildlife Service grant.
Project Benefit
This project will improve fish passage through the replacement of the existing CMP culvert with a clear span structure. Habitat quantity will be increased by improving fish passage conditions to upstream habitat for ESA-listed Chinook salmon and steelhead.
Accomplishments
Fish Passage |
Barriers Removed |
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Miles Opened |
2.60 |
2.60 |
Funding Details |
PCSRF | $54,697 |
Other | $74,845 |
Report Total: | $129,542 |
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Worksites
Pratt Creek Bridge
- Worksite Identifier: Pratt Creek Bridge
- Start Date: 09/01/2018
- End Date: 11/30/2018
Area Description
Salmon Subbasin, Lemhi 4th field HUC number 17060204, and the Pratt Creek watershed
Location Information
- Basin: Salmon (170602)
- Subbasin: Lemhi (17060204)
- Watershed: Lower Lemhi River (1706020408)
- Subwatershed: Sandy Creek-Lemhi River (170602040802)
- State: Idaho
- Recovery Domain: Snake River
- Latitude: 45.07641
- Longitude: -113.697004
ESU
- Snake River Basin Steelhead DPS
- Snake River Spring/Summer-run Chinook Salmon ESU
Map
Photos
Metrics
Metrics
- C.0
Salmonid Habitat Restoration and AcquisitionY (Y/N)
- . . C.0.a
Habitat restoration and acquisition funding 129,542.00
- . . C.0.b
Length of stream treated/protected .01
- . . C.0.c
Project identified in a Plan or Watershed Assessment | |
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- . . C.0.d.1
Project Monitoring (LOV)
- . . C.0.d.2
Monitoring Location (LOV)
- . . C.2
Fish Passage ImprovementY (Y/N)
- . . . . C.2.a
Fish Passage Funding 129,542.00
- . . . . C.2.b.1
Length of stream made accessible 2.60
- . . . . C.2.b.3
Type of blockage/barrier (LOV)
- . . . . C.2.b.4
Number of blockages/impediments/barriers impeding passage 1
- . . . . C.2.g.1
Bridge installed or improved at road stream crossingY (Y/N)
- . . . . . . C.2.g.2
Number of bridges installed or improved/upgraded 1
- . . . . . . C.2.g.3
Miles of stream made accessible by bridge installation or improvement/upgrade 2.60
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