Granite Supplemental Ditch Fish Deterrent Alternatives Analysis & Irrigation Evaluation

Trout Unlimited is soliciting qualifications from engineering firms to evaluate and modernize the Granite Supplemental Ditch diversion system in the Snake River Headwaters of northwest Wyoming. The project aims to assess irrigation infrastructure, analyze fish screening and deterrent technologies, and develop alternatives to reduce entrainment of Snake River cutthroat trout while maintaining reliable water delivery. The selected consultant will provide a defensible alternatives analysis and preliminary engineering recommendations. The project involves multiple phases, including alternatives analysis, engineering design, and construction oversight. Key aspects of the project include: • Reducing fish entrainment and mortality • Evaluating fish deterrent and screening technologies • Maximizing the cost-benefit ratio for capital expenditures • Improving irrigation efficiency while maintaining reliable delivery • Identifying feasible infrastructure modifications balancing ecological and operational needs • Providing data-driven recommendations for future design and construction phases