Sinclair Dam is a concrete gravity dam located on the Sinclair River in Wyoming, USA. Completed in 1964, it primarily serves to provide water for irrigation and to generate hydroelectric power. The dam creates Sinclair Reservoir, which is used for recreational activities such as fishing and boating. The dam stands approximately 90 feet tall and stretches about 1,200 feet across. It plays a crucial role in managing water resources in the region, helping to control flooding and maintain water supply for agricultural needs. The surrounding area is also home to various wildlife, making it an important ecological site.