Big Bend Dam
High HazardNot Available ConditionEmergency Action Plan: Yes
Location
| State | South Dakota |
| County | Lyman |
| Nearest City | CHAMBERLAIN |
| River/Stream | MISSOURI RIVER |
| Coordinates | 44.04170, -99.44453 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 205 ft |
| Dam Height | 96 ft |
| Dam Length | 10,570 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 1,900,000 acre-ft |
| Max Storage | 1,900,000 acre-ft |
| Normal Storage | 1,725,000 acre-ft |
| Surface Area | 60,000 acres |
| Drainage Area | 5,840 sq mi |
| Max Discharge | 390,000 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | USACE - Omaha District |
| Owner Type | Federal |
| Hazard Classification | High |
| Condition Assessment | Not Available |
| Last Inspection | 06/03/2024 |
| Emergency Action Plan | Yes |