Cushman No. 1 Spillway
Washington — Mason County
Location
| State | Washington |
| County | Mason |
| Coordinates | 47.41817, -123.22499 |
Physical Characteristics
| NID Height | 55 ft |
| Dam Height | 46 ft |
| Dam Length | 340 ft |
| NID Storage | 482,757 acre-ft |
| Max Storage | 482,757 acre-ft |
| Surface Area | 4,010 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Satisfactory |
| EAP Status | — |
| Last Inspection | — |
| Inspection Frequency | 1 |
Dam Information
| Year Completed | 1990 |
| Primary Purpose | Hydroelectric |
| Dam Type | — |
| Owner Type | — |
| Owner | City of Tacoma |
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.