Rock Cowan No. 4
Low Hazard ConditionEmergency Action Plan: Not Required
Location
| State | South Dakota |
| County | Dewey |
| Nearest City | NONE |
| River/Stream | TR MOREAU |
| Coordinates | 45.07499, -101.45332 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 400 ft |
| Year Completed | 1964 (62 years old) |
Storage & Hydraulics
| NID Storage | 50 acre-ft |
| Max Storage | 50 acre-ft |
| Normal Storage | 36 acre-ft |
| Max Discharge | 2,440 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | ROCK COWAN |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |