Peterson Ranch Conservation Easement
Salmonid Habitat Restoration and Acquisition
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| 012 20 SA | | Snake River | | 12/09/2020 | | 03/31/2025 | | 2020 | | Completed | | 07/21/2025 | | |
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Description
The Nature Conservancy (TNC) purchased an 181-acre conservation easement (CE) on the Peterson Ranch, located in the Lemhi River valley, to permanently protect conservation values and enable significant river restoration to occur on the property. The CE permanently protects 181-acres of working ranchland and wildlife habitat, and 0.60 miles of Hayden Creek (0.15 mi) and the Lemhi River (0.45 mi). In placing a CE over this property, TNC ensured that strategic restoration activities occur that directly address the needs of juvenile fish leaving spawning areas upriver. The Peterson Ranch CE is downstream adjacent to the Split River Ranch CE (PCSRF project 021 16 SA), purchased in June 2021. The two easements together protect a continuous 0.16 miles of Hayden Creek, and 1.2 miles of the Lemhi River.
A portion of the restoration work related to PCSRF project 014 21 SA/Lemhi River Mile 32 Habitat Enhancement- Confluence Phase was completed and used as match for the CE. Habitat actions included excavating new side channels, stabilizing streambanks, and installing instream wood structures in 0.3 miles of the Lemhi River to create off channel habitat and a side channel network, to improve juvenile rearing capacity for salmon and steelhead in the Lemhi River.
At the project proposal stage, all habitat metrics were proposed for the entire Confluence Phase. However, only a portion of the project’s instream habitat metrics were used as match, and are reported as such. The rest of the metrics will be reported under project 014 21 SA, and metrics between the two projects are not double-counted.
Project Benefit
1. Permanently protect 181 acres of working ranchland and wildlife habitat
2. Permanently protect .60 miles of Hayden Creek and the Lemhi River
3. Obligate the landowner to river restoration activities that will address juvenile rearing capacity
limitations in the Lemhi watershed. These activities will include the construction of side channels,
instream habitat work, and activating floodplain connectivity. Accomplishments
| Instream Habitat |
| Stream Miles Treated |
.20 |
.78 |
| Land Acquisition |
| Acres Acquired or Protected |
181.0 |
181.0 |
Stream Bank Miles Acquired
or Protected |
1.25 |
1.25 |
| Riparian Habitat |
| Stream Miles Treated |
.00 |
1.25 |
| Acres Treated |
.0 |
5.0 |
Funding Details |
|
| PCSRF | $513,663 |
| Other | $179,458 |
| Report Total: | $693,121 |
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Worksites
WS-1
- Worksite Identifier: WS-1
- Start Date:
- End Date: 11/30/2023
Area Description
Peterson Ranch_Lemhi River
Location Information
- Basin: Salmon (170602)
- Subbasin:
- Watershed:
- Subwatershed:
- State: Idaho
- Recovery Domain: Snake River
- Latitude: 44.870555
- Longitude: -113.628859
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 693,121.00
- . . C.0.b
Length of stream treated/protected .30
- . . 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.4
Instream Habitat ProjectY (Y/N)
- . . . . C.4.a
Instream Habitat Funding 179,458.00
- . . . . C.4.b
Total length of instream habitat treated .20
- . . . . 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 .20
- . . . . . . C.4.c.4
Miles of off-channel stream created through channel reconfiguration and connectivity .10
- . . . . . . C.4.c.5
Acres of off-channel or floodplain connected through channel reconfiguration and connectivity 2.0
- . . . . . . C.4.c.6
Instream pools created/added through channel reconfiguration and connectivity 0
- . . . . 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 .30
- . . . . . . C.4.d.4
Acres of streambed treated through channel structure placement 1.0
- . . . . . . C.4.d.5
Pools expected to be created through channel structure placement 8
- . . . . . . C.4.d.7
Number of structures placed in channel 8
- . . . . 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 .30
- . . C.5
Riparian Habitat ProjectY (Y/N)
- . . . . C.5.a
Riparian Habitat Funding .00
- . . . . C.5.b.1
Total riparian miles streambank treated .00
- . . . . C.5.b.2
Total Riparian Acres Treated .0
- . . . . C.5.c.1
Riparian plantingY (Y/N)
- . . . . . . C.5.c.2
| Species of plants planted in riparian | |
| None |
- . . . . . . C.5.c.3
Acres planted in riparian .0
- . . . . . . C.5.c.4
Miles of streambank treated with riparian planting .00
- . . . . C.5.d.1
FencingY (Y/N)
- . . . . . . C.5.d.2
Miles of fence along stream .00
- . . . . . . C.5.d.3
Acres of riparian area protected by fencing .0
- . . . . C.5.g.1
Conservation grazing managementY (Y/N)
- . . . . . . C.5.g.2
Acres managed for grazing .0
- . . C.10
Land or Easement AcquisitionY (Y/N)
- . . . . C.10.a
Land acquisition funding 513,662.74
- . . . . C.10.b
Habitat treatments applied (LOV)
- . . . . C.10.c.1
Acquisition or lease of land, wetland or estuarine area for conservationY (Y/N)
- . . . . . . C.10.c.2
Type of acquisition to protect habitat (LOV)
- . . . . . . C.10.c.3
Type of property protected (LOV)
- . . . . . . C.10.c.4
Date of expiration of protection12/31/9999 (mm/dd/yyyy)
- . . . . . . C.10.c.5
Miles of streambank protected by land or easement acquisition 1.25
- . . . . . . C.10.c.6
Acres of land, wetland or estuarine area acquired 181.0
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