Oahe Chapel Ecumenical Sunday Service
Hosted by various local churches, ecumenical services are held at the historic Oahe Chapel every Sunday from Memorial Day weekend through Labor Day weekend. The Oahe Chapel was established by Rev. Thomas L. Riggs, a Congregationalist minister, and his first wife, Cornelia Margaret “Nina” Foster, to serve as a mission to the Sioux Indians of central South Dakota. The chapel was originally located on the east bank of the Missouri River at Peoria Flats, roughly five miles upriver from its current location. It was moved to its current location in 1964 after construction of the Oahe Dam flooded the original site. The chapel is owned by the South Dakota State Historical Society and managed by the Oahe Chapel Preservation Society, which oversees its maintenance and preservation.