Hawley Creek Access and Flow Enhancement JHaC-02, PCSRF
Salmonid Habitat Restoration and Acquisition
|020 13 SA|
This project improved an existing irrigation system and installed 2 miles of buried pipeline for a landowner who previously used an open ditch to convey Hawley Creek (Salmon River subbasin) flow to the point of use. This work saves approximately 2.5 cfs in Hawley Creek for approximately 4.2 miles and protects approximately 1,811.11 acre-feet of water. This water conservation will remain in place for a minimum of 20 years, per an agreement between the Lemhi Soil and Water Conservation District and the landowner. The project did not change since the proposed description but the project sponsor realized 4.2 miles instead of 8.5 miles was a more accurate metric to not double-count the work of project 019 13 SA. One stream gauge was installed.
Hawley Creek, as a headwater tributary to the Lemhi River, is considered of particular importance to salmonid spawning given its ability to alter flow regimes, sediment inputs, and water temperatures in the upper Lemhi River. Historically, the Hawley Creek watershed was a major anadromous fish producer, but due to irrigation practices that dewater the stream and man-made migration barriers, Hawley Creek has been disconnected from the Lemhi River and inaccessible to Snake River spring/summer Chinook salmon (Oncorhynchus tshawytscha), Snake River Basin steelhead (Oncorhynchus mykiss), and fluvial Columbia River bull trout (Salvelinus confluentus) for over 100 years.
The Federal Colombia River Power System Expert Panel for Snake River Steelhead and Chinook salmon identified the three most limiting factors to salmonid production in the project area as water quantity (35%), habitat barriers (20%), and mechanical injury (15%). This project addresses water quantity.
• The Hawley Creek Private Culvert Replacement Project removed a fish passage barrier, project was sponsored by the Lemhi SWCD with BPA and PCSRF funding.
• The Hawley Creek BLM Culvert Replacement Project removed a fish passage barrier, project was sponsored by the Lemhi SWCD with BPA and PCSRF funding.
• The Lower Hawley Creek Culvert Replacement Project removed a fish passage barrier, project was sponsored by the Lemhi SWCD with BPA funding.
• The Hawley- Eighteenmile Creek Intercept Irrigation Project removed a fish passage barrier and increased instream flow, project was sponsored by the Lemhi SWCD and IDFG with BPA funding.
• The Eighteenmile Creek Railroad Grade Culvert to Bridge Replacement Project removed a fish passage barrier, project was sponsored by the Lemhi SWCD with BPA and PCSRF funding.
• The Upper Hawley Water Rights Point of Use Transfer removed a fish passage barrier and increased instream flow, project was sponsored by the Lemhi SWCD and IDFG with BPA and PCSRF funding.
2016 – to be implemented
• The Hawley Creek Access and Flow Enhancement (LHaC-01) Project will remove a fish passage barrier, increase instream flow, and remove mechanical injury to fish, project sponsored by the Lemhi SWCD with PCSRF and BPA funding.
• Hawley Creek HC02 Project will install a new HC02 irrigation diversion and fish screen, project sponsored by IDFG with BPA funding.
• Lower Eighteenmile-Hawley Creek Diversion Removal Project will remove a fish passage barrier. Project sponsors are Lemhi SWCD and USBR with funding from NRCS.
• Project LHaC02 will connect to a new point of diversion and fish screen that will be installed and funded through a separate project by IDFG and funded by BPA. This related project will open approximately 2.1 miles of upstream habitat for fish. The existing diversion structure at LHaC02 is a passage barrier at low flows and is unscreened.
- Worksite Identifier: LHac-02 Irrigation
- Start Date: 10/15/2016
- End Date: 05/15/2017
Salmon Subbasin, Lemhi 4th field HUC # 17060204 and the Hawley Creek Watershed
- Basin: Salmon
- State: Idaho
- Recovery Domain: Interior Columbia
- Latitude: 44.658458
- Longitude: -113.217545
- Snake River Basin Steelhead DPS
- Snake River Spring/Summer-run Chinook Salmon ESU
Salmonid Habitat Restoration and AcquisitionY (Y/N)
- . . C.0.a
Habitat restoration and acquisition funding 173,766.00
- . . C.0.b
Length of stream treated/protected 4.20
- . . 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.3
Instream Flow ProjectY (Y/N)
- . . . . C.3.a
Instream Flow Funding 173,766.00
- . . . . C.3.b
Length of stream 'protected' for adequate flow 4.20
- . . . . C.3.c
Change in water flow2.5 (cfs)
- . . . . C.3.d.1
Water flow gaugesY (Y/N)
- . . . . . . C.3.d.2
Number of water flow gauges 1
- . . . . C.3.e.1
Irrigation practice improvementY (Y/N)
- . . . . . . C.3.e.2
Acre feet of water conserved per year1811 (Acre feet)
- . . . . . . C.3.e.3
cfs (cubic feet per second) of water conserved2.5 (cfs)
- . . . . . . C.3.e.4
Initial start date of action or agreement12/10/2015 (mm/dd/yyyy)
- . . . . . . C.3.e.5
Final end date of action or agreement12/28/2035 (mm/dd/yyyy)