Rainbow Lake Dam
Washington — Columbia County — Tucannon River-Offstream
Location
| State | Washington |
| County | Columbia |
| River | Tucannon River-Offstream |
| Coordinates | 46.31470, -117.66075 |
Physical Characteristics
| NID Height | 14 ft |
| Dam Height | — |
| Dam Length | 1,700 ft |
| NID Storage | 70 acre-ft |
| Max Storage | 70 acre-ft |
| Surface Area | 10 acres |
Safety Classification
| Hazard Potential | Low |
| Condition Assessment | — |
| EAP Status | Not Required |
| Last Inspection | May 15, 1998 |
| Inspection Frequency | — |
Dam Information
| Year Completed | 1955 |
| Primary Purpose | Recreation |
| Dam Type | Gravity |
| Owner Type | State |
| Owner | WA DFW |
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.