Twin Parks 7, also known as Birch Lake, is a recreational dam in Wisconsin managed by the local government with oversight from the Wisconsin Department of Natural Resources. Completed in 1963, this earth dam stands at 37.6 feet tall and spans 540 feet, providing storage for 230 acre-feet of water and serving as a popular spot for outdoor activities in the area. The dam's purpose is primarily for recreation, with a spillway type of Controlled and a maximum discharge capacity of 550 cubic feet per second.

Despite its fair condition assessment, Twin Parks 7 poses a high hazard potential due to its location on Trout Creek and its high risk assessment rating. Regular inspections are conducted, with the last one taking place in May 2019, and an emergency action plan is in place to ensure public safety in the event of a dam failure. With its very high risk and potential impact on the surrounding community, continued maintenance and monitoring of Twin Parks 7 are crucial to prevent any future incidents and protect the ecosystem and water resources in the area.