Koster Dam
Low Hazard ConditionEmergency Action Plan: Not Required
Location
| State | South Dakota |
| County | Walworth |
| River/Stream | TRIB-MISSOURI |
| Coordinates | 45.43333, -99.84332 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 550 ft |
| Year Completed | 1971 (55 years old) |
Storage & Hydraulics
| NID Storage | 20 acre-ft |
| Max Storage | 20 acre-ft |
| Normal Storage | 16 acre-ft |
| Max Discharge | 1,500 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | JOHN KOSTER |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |