T.w. Lyman
Significant Hazard ConditionEmergency Action Plan: Not Required
Location
| State | South Dakota |
| County | Corson |
| Nearest City | WAKPALA |
| River/Stream | TR-OAK CREEK |
| Coordinates | 45.91999, -100.77499 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 600 ft |
| Year Completed | 1940 (86 years old) |
Storage & Hydraulics
| NID Storage | 175 acre-ft |
| Max Storage | 175 acre-ft |
| Normal Storage | 96 acre-ft |
| Max Discharge | 2,100 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | ADOLPH HEPPER |
| Owner Type | Private |
| Hazard Classification | Significant |
| Emergency Action Plan | Not Required |