Williamson Dam
Low Hazard ConditionEmergency Action Plan: Not Required
Location
| State | South Dakota |
| County | Meade |
| Nearest City | NONE |
| River/Stream | NINE MILE CREEK |
| Coordinates | 44.58666, -103.29166 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 460 ft |
| Year Completed | 1984 (42 years old) |
Storage & Hydraulics
| NID Storage | 220 acre-ft |
| Max Storage | 220 acre-ft |
| Normal Storage | 110 acre-ft |
| Surface Area | 23 acres |
| Drainage Area | 30 sq mi |
| Max Discharge | 20,000 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | MARRS RANCH, LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |