Lake Calhoun Diversion, located in Crow River, Minnesota, is a gravity dam completed in 1937 with a height of 10 feet and a hydraulic height of 4.4 feet. The dam serves as a crucial structure for water resource management, with a normal storage capacity of 75 acre-feet and a maximum storage of 90 acre-feet. With a drainage area of 151.6 square miles, the dam plays a significant role in regulating water flow and ensuring downstream water availability.

Managed by the Minnesota Department of Natural Resources, Lake Calhoun Diversion is state-regulated and undergoes regular inspections to maintain its fair condition and low hazard potential. The dam primarily serves "Other" purposes and is designed as a buttress gravity dam, spanning 18 feet in length and covering a surface area of 617 acres. Despite its age, the dam continues to efficiently contribute to flood control measures and water storage in the region, highlighting its importance in the overall water resource infrastructure.

With its historical significance and ongoing operational relevance, Lake Calhoun Diversion stands as a testament to effective water management practices in Minnesota. The dam's presence on the Crow River Middle Fork not only ensures water availability for various stakeholders but also showcases the state's commitment to maintaining critical infrastructure for climate resilience. As climate change impacts continue to challenge water resources, Lake Calhoun Diversion remains a vital component in safeguarding the region's water security and adaptation efforts.