Lower Diversion, located in Shelley, Idaho, is a crucial hydroelectric facility along the Snake River with a primary purpose of generating clean energy. Constructed in 1982, this gravity dam stands at a height of 14 feet and has a storage capacity of 1200 acre-feet, serving as a reliable source of power and recreation for the local community. The dam has a controlled spillway, with a width of 930 feet, to manage water flow and ensure safety during periods of high discharge.

Owned and regulated by the local government and the Federal Energy Regulatory Commission, Lower Diversion undergoes regular inspections to maintain its low hazard potential and ensure its structural integrity. With a drainage area of 9800 square miles and a maximum discharge capacity of 75,000 cubic feet per second, the dam plays a crucial role in managing water resources and mitigating flood risks in the region. Despite its age, Lower Diversion continues to meet safety guidelines and serves as a testament to effective risk management in the face of climate challenges.