The Sheep Ridge ditch diversion on the Lostine River in Wallowa County, Oregon is a passage barrier to ESA Listed fish including Chinook salmon (Oncorhynchus tshawytscha), steelhead trout (Oncorhynchus mykiss), bull trout (Salvelinus confluentus) as well as several other aquatic species. The structure does not meet fish passage criteria as currently applied by ODFW and National Marine Fisheries Service - especially at low, late-season, summer flows. The proposed action will convert the existing 4-walled concrete and wooden structure to a roughened channel diversion and fishway restoring access to 20-miles of habitat upstream. This proposal is supported by quantitative analysis of a peer-reviewed fish passage study and technical scrutiny by fisheries managers, regulatory agencies, and local stakeholders. Engineering and design for the project is substantiated by the success of similar projects including one recently constructed directly downstream at the City of Lostine diversion. Partners include the Sheep Ridge ditch company, ODFW, GRMW and adjacent landowners Bill Norman and the Cherry family.