DESCRIPTION
The Asotin County Conservation District is sponsoring the Tenmile Creek PA 65, 66 & 67 LWD Instream Habitat Project to install approximately 150 large woody debris structures including Post Assisted Log Structures (PALS), Beaver Dam Analog Structures (BDAS) and engineered wood structures. This project is project is located south of the City of Asotin, WA along Tenmile Creek Road. The project begins at RM 1.6 and ends a RM 3.1. Tenmile Creek is listed as an mSA and Priority Restoration Reach that flows directly into the Snake River. PA 65 was identified as a Tier 2 and PA 66 & 67 as Tier 3 project areas. The total reach length for the proposed project is 1.5-miles. There is one landowner for this project area and the property is enrolled in CREP. The conceptual plan recommendations for all three project areas include adding LWD throughout the reach to increase geomorphic complexity and promote overbank flows. Additional recommendations for PA 66 including the need for LWD to increase sediment and water retention since this reach does not support perennial stream flows. The LWD structures will be placed strategically to maximize the goals of the project. The project area upstream is a Tier 1 reach. This project will be the first phase for the reach to improve stream function and habitat for Snake River Steelhead. Additional phases will be planned based on conditions after construction of this project to continue improving the stream and riparian conditions.
The Asotin County Conservation District installed 155 large woody debris structures on Tenmile Creek south of the City of Asotin in Asotin County. Structures included Post Assisted Log Structures (PALS) and Beaver Dam Analog Structures (BDAs). The project is located between river mile 1.6 and river mile 3.1 of Tenmile Creek. Tenmile Creek is listed as a minor spawning area and Priority Restoration Reach that flows directly into the Snake River. The installed structures increase geomorphic complexity, promote overbank flows, increase sediment retention, and pool water retention. All elements that improve stream function and habitat for Snake River Steelhead.