Lemhi River Mile 32 Restoration and Diversion Consolidation

Salmonid Habitat Restoration and Acquisition

Fish Screening Instream Flow Instream Habitat Riparian Habitat
Project ID004 21 SA
Recovery DomainsInterior Columbia
Start Date12/09/2021
End Date10/31/2024
Year2021
StatusNew
Last Edited04/27/2022
 
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Description    


The Lemhi SWCD will implement an irrigation infrastructure project to close a diversion on the Lemhi River and pipe water around an area designated for habitat restoration on 0.95 mile of the Lemhi River and 0.06 mile of Hayden Creek. Current habitat conditions include a straightened channelized homogeneous river segment that contains no instream woody material, disengaged floodplain, and limited riparian vegetation.

The irrigation component will close diversion L-39, install a new splitter box on L-41/42, and add a pipeline to deliver water to the authorized Place of Use. A stockwater system will keep 0.5 cfs instream in the Lemhi River from Oct 15-Mar 15 to its confluence (found under instream flow in metrics rather than upland habitat; the system will eliminate winter withdrawal and the area is already protected from grazing). By furnishing and installing these irrigation components, habitat restoration treatments can then be implemented on the Lemhi River and Hayden Creek.

Habitat project actions include: 1) realign the Lemhi River to increase sinuosity, 2) install instream structures to increase habitat complexity, 3) stabilize existing streambank, 4) expand the floodplain, 5) create lateral side channel habitat, 6) install riparian plantings of native species, and 7) install fence to protect the riparian area.

Project Benefit    


Developing a large portion of this property into more of a natural floodplain while restoring natural river processes and function will directly increase habitat capacity for juvenile life stages of salmon and steelhead. Improving the current condition by increasing river sinuosity, developing habitat complexity in the form of woody debris structures, constructing side channels, and riparian zone restoration will result in improved survival for all freshwater juvenile life stages. The magnitude of these affects will be substantial since the project is located at the confluence of the Lemhi River and Hayden Creek primary Chinook salmon production areas. The cold clear Hayden Creek waters mix with the nutrient rich Lemhi River waters and create a prime location for summer parr and overwintering juvenile steelhead and salmon.

Accomplishments

Metric Completed Originally
Proposed
Instream Habitat
  Stream Miles Treated 1.01
Riparian Habitat
  Stream Miles Treated 1.00
  Acres Treated 10.0

Funding Details

SourceFunds
PCSRF$1,295,980
Other$514,891
Report Total:$1,810,871


Project Map



Worksites

WS-1    


  • Worksite Identifier: WS-1
  • Start Date: 04/01/2023
  • End Date: 10/31/2024
Area Description

No Area Description data was found for this worksite.

Location Information

  • Basin: Salmon
  • Subbasin:
  • Watershed:
  • Subwatershed:
  • State: Idaho
  • Recovery Domain: Interior Columbia
  • Latitude: 44.87333
  • Longitude: -113.62848

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 .00
    •      . . C.0.b Length of stream treated/protected
    •      . . C.0.c
      Project identified in a Plan or Watershed Assessment
    •      . . C.0.d.1 Project Monitoring (LOV)
    •      . . C.0.d.2 Monitoring Location (LOV)
    •      . . C.1 Fish Screening ProjectY (Y/N)
      •      . . . . C.1.a Fish screen funding
      •      . . . . C.1.b Quantity of water protected by screens (Acre feet/year)
      •      . . . . C.1.d.1 Fish screens replaced or modifiedY (Y/N)
        •      . . . . . . C.1.d.2 Number of fish screens replaced or modified
      •      . . C.3 Instream Flow ProjectY (Y/N)
        •      . . . . C.3.a Instream Flow Funding
        •      . . . . C.3.b Length of stream 'protected' for adequate flow
        •      . . . . C.3.c Change in water flow (cfs)
        •      . . . . C.3.h.1 Unspecified or other instream flow projectY (Y/N)
          •      . . . . . . C.3.h.2 cfs (cubic feet per second) of water conserved per year (cfs)
        •      . . C.4 Instream Habitat ProjectY (Y/N)
          •      . . . . C.4.a Instream Habitat Funding
          •      . . . . C.4.b Total length of instream habitat treated
          •      . . . . C.4.c.1 Channel reconfiguration and connectivityY (Y/N)
            •      . . . . . . C.4.c.2 Type of change to channel configuration and connectivity (LOV)
            •      . . . . . . C.4.c.3 Miles of stream treated for channel reconfiguration and connectivity .36
            •      . . . . . . C.4.c.4 Miles of off-channel stream created through channel reconfiguration and connectivity .62
            •      . . . . . . C.4.c.6 Instream pools created/added through channel reconfiguration and connectivity
          •      . . . . C.4.d.1 Channel structure placementY (Y/N)
            •      . . . . . . C.4.d.2 Material used for channel structure (LOV)
            •      . . . . . . C.4.d.3 Miles of stream treated through channel structure placement
            •      . . . . . . C.4.d.5 Pools expected to be created through channel structure placement
            •      . . . . . . C.4.d.7 Number of structures placed in channel
          •      . . . . C.4.e.1 Streambank stabilization Y (Y/N)
            •      . . . . . . C.4.e.2 Material Used For Streambank Stabilization (LOV)
            •      . . . . . . C.4.e.3 Miles of streambank stabilized
          •      . . C.5 Riparian Habitat ProjectY (Y/N)
            •      . . . . C.5.a Riparian Habitat Funding
            •      . . . . C.5.b.1 Total riparian miles streambank treated
            •      . . . . C.5.b.2 Total Riparian Acres Treated
            •      . . . . C.5.c.1 Riparian plantingY (Y/N)
              •      . . . . . . C.5.c.2
                Species of plants planted in riparian
              •      . . . . . . C.5.c.3 Acres planted in riparian
              •      . . . . . . C.5.c.4 Miles of streambank treated with riparian planting
            •      . . . . C.5.d.1 FencingY (Y/N)
              •      . . . . . . C.5.d.2 Miles of fence along stream
              •      . . . . . . C.5.d.3 Acres of riparian area protected by fencing