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 751–775 of 817
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Upper Blackhorse Dam Spokane County | 10 | 1960 | Low | Fair |
| Upper Falls Control Works Spokane County | 24 | 1922 | Low | Satisfactory |
| Upper Loop Reservoir Chelan County | 47 | 2015 | High | Satisfactory |
| Upper Mill Creek Stormwater Detention Da King County | 21 | 1990 | High | Satisfactory |
| Upper Snow Dam Chelan County | 10 | 1939 | Low | Poor |
| Upper Sunlight Lake Dam Kittitas County | 22 | 1967 | High | Satisfactory |
| Upper Turnbull Dam Spokane County | 12 | 1960 | Low | Fair |
| Upper Wheeler Dam Chelan County | 65 | 1922 | High | Fair |
| Upper Wheeler Saddle Dam Chelan County | 15 | 1992 | High | Fair |
| Upriver Dam Spokane County | 38 | 1937 | High | Poor |
| Utter Dam San Juan County | 16 | 1971 | Low | Not Rated |
| Vaagen Mitigation Control Structure Pend Oreille County | 18 | 1990 | Low | Not Rated |
| Valley View Dairy Waste Pond Skagit County | 13 | 2003 | Significant | Poor |
| Van Stone Pit Lake Dam Stevens County | 25 | 1999 | High | Poor |
| Van Stone Tailings Dam Stevens County | 90 | 1970 | Significant | Poor |
| Van Wingerden Pond 1 Yakima County | 18 | 1980 | Low | Fair |
| Wade Dann Waterski Pond Dam Skagit County | 8 | 1990 | Low | Not Rated |
| Waitt Lk Valley Sewage Treatment Lagoon Stevens County | 10 | 1998 | Low | Not Rated |
| Walla Walla Effluent Storage Lagoon Walla Walla County | 19 | 2008 | Low | Satisfactory |
| Wanapum Kittitas County | 206 | 1965 | High | Fair |
| Wandermere Lake Dam Spokane County | 10 | 1930 | Low | Not Rated |
| Wapato Lake Dam Chelan County | 40 | 1912 | High | Fair |
| Warman Waterski Lake Dam Clark County | 8 | 1988 | Low | Not Rated |
| Waterville Effluent Storage Pond Douglas County | 30 | 1981 | Low | Not Rated |
| Waterville Sewage Treatment Pond Douglas County | 8 | 1954 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.