Nekoosa, located in Wood, Wisconsin, is a private hydroelectric dam on the Wisconsin River with a gravity design and a structural height of 32 feet. Completed in 1889, this dam serves multiple purposes including hydroelectric power generation and recreation, with a storage capacity of 3,400 acre-feet and a drainage area of 5,525 square miles. The dam's spillway is controlled and has a width of 745 feet, with three Tainter (radial) outlet gates.

Despite its age, Nekoosa has a low hazard potential and a very high risk assessment rating of 1. The Federal Energy Regulatory Commission oversees its regulation and inspections, ensuring its safe operation. While its condition assessment is not available, it has an inspection frequency of 3 years and an emergency action plan in place. With its historical significance and ongoing importance in water resource management, Nekoosa remains a key player in the sustainable use of hydroelectric power and environmental conservation efforts in Wisconsin.