Grimh, also known as Radisson, is a privately owned hydroelectric dam located in Sawyer County, Wisconsin. Constructed in 1929, this gravity dam stands at a height of 30 feet and has a hydraulic height of 26 feet. With a storage capacity of 710 acre-feet and a maximum discharge of 5200 cubic feet per second, Grimh plays a vital role in harnessing water resources for hydroelectric power generation and recreational activities in the area.

Despite its age, Grimh remains a significant structure in the region, with state regulation, inspection, and enforcement measures in place to ensure its safety and functionality. The dam has a high hazard potential and is classified as having a very high risk level, emphasizing the importance of proper risk management and emergency preparedness. While the condition assessment of Grimh is currently not rated, regular inspections are conducted to monitor its structural integrity and address any potential issues that may arise.

With its historical significance and critical role in water resource management, Grimh serves as a key feature in the landscape of Sawyer County. As a part of the Coudray River system, this dam continues to provide valuable services in terms of power generation and recreational opportunities, highlighting the intersection of water resource management and climate resilience in the region.