Otter Tail Lake, located in Minnesota, is a state-regulated body of water with a gravity dam that was completed in 1936 by MNDNR. This lake serves multiple purposes, including flood control and recreation, with a low hazard potential and satisfactory condition assessment. With a storage capacity of 557,200 acre-feet and a surface area of 14,745 acres, Otter Tail Lake plays a crucial role in managing water resources in the region.

The dam on Otter Tail Lake is designed to control the flow of the Otter Tail River and has a spillway width of 105 feet. The lake's drainage area covers 1,160 square miles, and it has a maximum discharge capacity of 4,372 cubic feet per second. Despite its low hazard potential, the lake is subject to moderate risk, as assessed by regulatory agencies, and is inspected every eight years to ensure its structural integrity and safety measures are up-to-date.

Otter Tail Lake is a vital water resource in Otter Tail County, Minnesota, managed by the state agency MNDNR EWR. With its historical significance dating back to the 1930s, the lake continues to provide essential water management functions for the region. Enthusiasts of water resources and climate will appreciate the role that Otter Tail Lake plays in maintaining the ecological balance and supporting the recreational activities of the local community.