Tenmile Creek PA 65, 66, 67 LWD Instream Habitat

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.

The goal of this project is to improve hydraulic and geomorphic complexity, promote overbank flows and increase sediment sorting and water retention in Tenmile Creek. The addition of large wood to the channel in the project area will provide structural elements to start improving riparian and geomorphic stream function. This work will benefit Snake River steelhead.