Prairie River, located in Grand Rapids, Minnesota, is a vital water resource managed by the Federal Energy Regulatory Commission for hydroelectric power generation and recreation purposes. The dam, completed in 1920, stands at a height of 35 feet and has a storage capacity of 17,000 acre-feet. With a controlled spillway and a maximum discharge of 6,700 cubic feet per second, Prairie River plays a crucial role in managing water flow and storage in the region.

Despite its age, Prairie River dam has a low hazard potential and a very high risk assessment rating of 1, indicating the importance of regular inspections and maintenance. The dam's infrastructure includes slide and tainter gates for water release control, ensuring the safety and efficiency of the structure. Prairie River is part of the St. Paul District of the US Army Corps of Engineers, contributing to the overall water management efforts in the area.

As a key component of the water infrastructure in Itasca County, Prairie River serves as a prime example of sustainable water resource management. Its importance for both energy production and recreational activities underscores the need for ongoing monitoring and maintenance to ensure the safety and reliability of this essential dam.