The Thornapple Association consists of approximately 230 home owners with frontage on the Thornapple River in Grand Rapids, Michigan between the Cascade and Ada Dams. While the dam in Cascade is owned by Cascade Township, the Ada dam is actually owned by the Thornapple Association and leased to a private company which operates the dam for production and sale of electricity. This section of the Thornapple River is one of the most scenic riverfronts in western Michigan and the members of the Thornapple Association work together to help keep the river clean and beautiful.