BPA Contract 51398. The Okanogan River contains summer steelhead, a stock federally-listed as "threatened". In an effort to recover this stock, cold water habitat contained within tributaries of the Okanogan River need to be rehabilitated. One tributary, Loup Loup Creek (watershed size 63.9 square miles), has been utilized for spawning by summer steelhead as indicated by 39 redds in the lowermost 1 mile during the spring of 2010 (B. Miller, personal communication, Colville Tribes). Not unlike many tributaries of the Okanogan River, flows in Loup Loup Creek are diverted for agricultural production. Consequently, the lowermost 1.0 mile of Loup Loup Creek has been intermittently disconnected from the Okanogan River since the 1930's. In an effort to reconnect the lower 1.0 mile of Loup Loup Creek, the Colville Tribes, along with other entities, are working with local irrigation associations for a viable solution to provide continuous instream flow while maintaining agricultural production.

In addition to the lack of sufficient flow, a perched culvert at RM 0.1 impedes fish passage into Loup Loup Creek. The road (Burdett Street) crosses Loup Loup Creek and provides access to a few private residences. This undersized, perched culvert is proposed to be replaced with a bottomless box culvert. At the project site the channel will be lined with a mixture of streambed materials designed for stability and impermeability.