Fort Sully
Under the Waters
State: South Dakota
County: Sully County
Founded: 1863
Abandoned: 1894
Peak Population: Military post
Fort Sully was established in 1863 to protect settlers during the Dakota War. The fort and town that grew around it were abandoned in 1894. When the Oahe Dam was built, the site was submerged beneath Lake Oahe. At low water, foundations may be visible.
Quick Facts
- Frontier fort (1863-1894)
- Submerged by Oahe Dam
- Foundations visible at low water
Location
Address: Lake Oahe, SD
Coordinates: 44.4167, -100.0667