Columbia Marsh Unit #1 Dam
Washington — Grant County
Location
| State | Washington |
| County | Grant |
| Coordinates | 46.95834, -119.26000 |
Physical Characteristics
| NID Height | 25 ft |
| Dam Height | 20 ft |
| Dam Length | 2,500 ft |
| NID Storage | 570 acre-ft |
| Max Storage | 570 acre-ft |
| Surface Area | 58 acres |
Safety Classification
| Hazard Potential | Low |
| Condition Assessment | Poor |
| EAP Status | — |
| Last Inspection | — |
| Inspection Frequency | 5 |
Dam Information
| Year Completed | 1958 |
| Primary Purpose | Fish and Wildlife Pond |
| Dam Type | — |
| Owner Type | — |
| Owner | US FISH AND WILDLIFE SERVICE |
Location Map
About This Dam Record
Dam safety data is maintained by the Army Corps of Engineers National Inventory of Dams (NID). High-hazard dams are those where failure could cause loss of life or major property damage downstream.