Washington Dams
817 dams tracked by the National Inventory of Dams
Total Dams
817
High Hazard
404
49.4%
Poor / Unsatisfactory
65
Average Age
55 yrs
Hazard Classification
High404 (49.4%)
Significant98 (12.0%)
Low312 (38.2%)
Condition Assessment
Satisfactory241 (29.5%)
Fair191 (23.4%)
Poor / Unsatisfactory65 (8.0%)
Not Rated320 (39.2%)
Federal
69
State
42
Local
193
Private
392
Tallest Dams
- Grand Coulee Dam550 ft
- Ross540 ft
- Mud Mountain Dam425 ft
- Swift No. 1412 ft
- Diablo389 ft
High Hazard Dams
- Grand Coulee DamHigh
- RossHigh
- Mud Mountain DamHigh
- Swift No. 1High
- DiabloHigh
Poor Condition Dams
- Lower BakerPoor
- WellsPoor
- Van Stone Tailings DamPoor
- Indian Creek DamPoor
- Butterworth DamPoor
All Dams in Washington
Showing 226–241 of 241
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Upper Sunlight Lake Dam Kittitas County | 22 | 1967 | High | Satisfactory |
| Walla Walla Effluent Storage Lagoon Walla Walla County | 19 | 2008 | Low | Satisfactory |
| West Bank Project Reservoir Franklin County | 34 | 2003 | High | Satisfactory |
| Western Nuclear Tailings Pond Stevens County | 62 | 1977 | Significant | Satisfactory |
| Whatcom Lake Dam Whatcom County | 19 | 1937 | High | Satisfactory |
| William Symington Dam Kitsap County | 39 | 1965 | High | Satisfactory |
| Wood Reservoir Dam No 1 Chelan County | 22 | 1991 | High | Satisfactory |
| Wood Reservoir Dam No 2 Chelan County | 22 | 1989 | High | Satisfactory |
| Wright Creek Stormwater Pond Dam Kitsap County | 14 | 2006 | Significant | Satisfactory |
| Wynoochee Grays Harbor County | 175 | 1972 | High | Satisfactory |
| Yellow Lake Outlet Dike King County | 10 | 1986 | High | Satisfactory |
| Youngs Lake Cascades Dam King County | 16 | 1950 | Significant | Satisfactory |
| Youngs Lake New Inlet Dam King County | 20 | 1926 | High | Satisfactory |
| Youngs Lake Outlet Dam King County | 10 | 1921 | High | Satisfactory |
| Zintel Canyon Dam Benton County | 125 | 1992 | High | Satisfactory |
| Zosel Dam Okanogan County | 16 | 1986 | High | Satisfactory |
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Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.