![Blue Blanket Valley Map](https://i0.wp.com/octa-trails.org/wp-content/uploads/2023/09/Picture9-1.jpg?fit=468%2C351&ssl=1)
The Blue Blanket Island site (39WW9), a small, fortified, proto-historic Indian village on an island in the Missouri River, in Walworth County, South Dakota, was partially excavated by a River Basin Surveys crew in August 1961. One centrally located earthlodge, Read More …