Located in Thief River Falls, Minnesota, the Lost River Pool is a state-regulated fish and wildlife pond that serves as a vital resource for the region. Built in 1988 by the Red Lake WD, this Earth-type dam stands at 14 feet tall and spans 25,000 feet in length, with a storage capacity of 15,000 acre-feet. The dam's primary purpose is to provide habitat for fish and wildlife, with a normal storage capacity of 5,500 acre-feet and a surface area of 2,000 acres.

With a low hazard potential and fair condition assessment, the Lost River Pool is maintained by the Minnesota Department of Natural Resources (MNDNR EWR), which oversees permitting, inspection, and enforcement activities. The dam is equipped with a controlled spillway and has a maximum discharge capacity of 600 cubic feet per second, ensuring effective flood control measures for the surrounding area. The risk assessment for the dam indicates a very high risk level, emphasizing the importance of ongoing monitoring and maintenance efforts to ensure the safety and integrity of the structure.

As a critical component of the local water resource infrastructure, the Lost River Pool plays a key role in supporting ecological diversity and water management in Marshall County, Minnesota. With its strategic location on the Lost River and strong regulatory oversight, this dam serves as a valuable asset for both wildlife conservation and flood protection efforts in the region. Continued collaboration between state agencies and stakeholders will be essential in ensuring the long-term sustainability and resilience of the Lost River Pool and its surrounding ecosystem.