Milles Lake Dam
Washington — Okanogan County — Unnamed Tr. -Twisp R.
Location
| State | Washington |
| County | Okanogan |
| River | Unnamed Tr. -Twisp R. |
| Coordinates | 48.39233, -120.18463 |
Physical Characteristics
| NID Height | 6 ft |
| Dam Height | — |
| Dam Length | 250 ft |
| NID Storage | 29 acre-ft |
| Max Storage | 29 acre-ft |
| Surface Area | 27 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Satisfactory |
| EAP Status | Yes |
| Last Inspection | October 24, 2023 |
| Inspection Frequency | 5 |
Dam Information
| Year Completed | 1950 |
| Primary Purpose | Fish and Wildlife Pond |
| Dam Type | Earth |
| 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.