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 126–150 of 191
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Hog Lake Dam Spokane County | 22 | 1957 | High | Fair |
| Hilltop Waterski Pond Snohomish County | 30 | 1995 | High | Fair |
| Hecla Groundwater Management Impoundment Ferry County | 24 | 2015 | Significant | Fair |
| Hecla-Day Mine Aspen Tailings Saddle Dam Ferry County | 40 | 1987 | Significant | Fair |
| Hecla-Day Mine Aspen Tailings Dam Ferry County | 95 | 1940 | Significant | Fair |
| Hawkins Dam Okanogan County | 16 | 1940 | High | Fair |
| Hattie'S Pond Kitsap County | 43 | 1931 | Significant | Fair |
| Great Depression Dam Chelan County | 22 | 1998 | High | Fair |
| Grandview Wastewater E&F Lagoons Dam Yakima County | 9 | 1997 | Significant | Fair |
| Grandview Wastewater Aqua Lagoon Dam Yakima County | 10 | 1999 | Significant | Fair |
| Grandview Wastewater A-Cell Lagoon Dam Yakima County | 7 | 1991 | Significant | Fair |
| Garrison Creek 98th Avenue Detention D King County | 30 | 1996 | High | Fair |
| Gamache Dam Yakima County | 11 | 1987 | High | Fair |
| Friesland Dairy Lagoons Yakima County | 6 | 2013 | High | Fair |
| Flat Top Ranch Frost Control Pond Walla Walla County | 18 | 1996 | High | Fair |
| Fire Mountain Boy Scout Camp Dam A Skagit County | 18 | 1971 | High | Fair |
| Fanchers Dam Okanogan County | 68 | 1926 | High | Fair |
| Fairview Reservoir No 2 Grays Harbor County | 25 | 1921 | High | Fair |
| Fairfield Sewage Equalization Basin - Lagoon 2 Spokane County | 12 | 1966 | Significant | Fair |
| Fairfield Sewage Aerated Lagoon - Lagoon 1 Spokane County | 13 | 2003 | Significant | Fair |
| Enloe Dam Okanogan County | 63 | 1920 | Significant | Fair |
| Engelsma Dairy Lagoon Dam Whatcom County | 7 | 1994 | Significant | Fair |
| Edaleen Dairy Waste Storage Pond No 3 Whatcom County | 12 | 2007 | High | Fair |
| Edaleen Dairy Waste Storage Pond No. 2 Whatcom County | 8 | 1989 | High | Fair |
| Dionysus Dam Franklin County | 18 | 1973 | High | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.