Triple Seven No.1
Low Hazard ConditionEmergency Action Plan: Not Required
Location
| State | South Dakota |
| County | Custer |
| Nearest City | NONE |
| River/Stream | TR-CHEYENNE |
| Coordinates | 43.68543, -103.08994 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 900 ft |
| Year Completed | 1947 (79 years old) |
Storage & Hydraulics
| NID Storage | 115 acre-ft |
| Max Storage | 115 acre-ft |
| Normal Storage | 67 acre-ft |
| Max Discharge | 2,835 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | HILLENBRAND INDUSTRIES |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |