Cottonwood Springs Dam
High HazardNot Available ConditionEmergency Action Plan: Yes
Location
| State | South Dakota |
| County | Fall River |
| Nearest City | HOT SPRINGS |
| River/Stream | COTTONWOOD SPRINGS CREEK |
| Coordinates | 43.43798, -103.56585 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 123 ft |
| Dam Length | 1,190 ft |
| Year Completed | 1969 (57 years old) |
Storage & Hydraulics
| NID Storage | 11,635 acre-ft |
| Max Storage | 11,635 acre-ft |
| Normal Storage | 655 acre-ft |
| Surface Area | 42 acres |
| Drainage Area | 26 sq mi |
| Max Discharge | 39,600 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | USACE - Omaha District |
| Owner Type | Federal |
| Hazard Classification | High |
| Condition Assessment | Not Available |
| Last Inspection | 08/11/2025 |
| Emergency Action Plan | Yes |