Pool No. 1, located in Thief River Falls, Minnesota, is a federal-owned earth dam completed in 1967 with a primary purpose of serving as a water resource structure. The dam stands at 11 feet high and spans a length of 8000 feet, holding a storage capacity of 4830 acre-feet. With a low hazard potential and a condition assessment currently not rated, Pool No. 1 plays a crucial role in managing the water resources of the Thief River-TR area.

Despite not being regulated or inspected by the state, Pool No. 1 remains a key feature in the local landscape, with Collin Peterson (D) representing the area in Congress. With a maximum discharge capacity of 1300 cubic feet per second, the dam serves as a vital piece of infrastructure for flood control and water management in the region. The dam's emergency action plan status, risk assessment, and management measures are currently undisclosed, leaving room for future development and improvement in its operations.

As a significant water resource structure in Marshall County, Pool No. 1 provides valuable storage capacity for the surrounding area, with a normal storage level of 1690 acre-feet. While the dam's condition assessment is not rated, its low hazard potential indicates a level of safety for the community. With its completion dating back to 1967, Pool No. 1 continues to play a crucial role in water resource management in the region, ensuring the protection of the surrounding areas from potential flooding events.