Irwin Dam
Low Hazard ConditionEmergency Action Plan: Not Required
Location
| State | South Dakota |
| County | Tripp |
| Nearest City | NONE |
| River/Stream | WHITE RIVER OFF STREAM |
| Coordinates | 43.30833, -99.59666 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 1,400 ft |
| Year Completed | 1938 (88 years old) |
Storage & Hydraulics
| NID Storage | 684 acre-ft |
| Max Storage | 315 acre-ft |
| Normal Storage | 684 acre-ft |
| Surface Area | 45 acres |
| Drainage Area | 17 sq mi |
| Max Discharge | 1,946 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | DON MANSCHEIM |
| Owner Type | Private |
| Hazard Classification | Low |
| Last Inspection | 05/09/1990 |
| Emergency Action Plan | Not Required |