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 276–300 of 404
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Hannegan Road Detention Basin Whatcom County | 28 | 1996 | High | Satisfactory |
| Haight Reservoir Dam Clark County | 12 | 1951 | High | Poor |
| Great Depression Dam Chelan County | 22 | 1998 | High | Fair |
| Grand Coulee Dam Okanogan County | 550 | 1941 | High | Not Available |
| Gorge Whatcom County | 300 | 1961 | High | Satisfactory |
| George Deruyter & Son Dairy Lagoon 3 Yakima County | 22 | 2022 | High | Not Rated |
| George Deruyter & Son Dairy Lagoon 2 Yakima County | 24 | 2022 | High | Not Rated |
| Geneva Lake Dam Whatcom County | 10 | 1988 | High | Satisfactory |
| Garrison Creek 98th Avenue Detention D King County | 30 | 1996 | High | Fair |
| Gap Road Reservoir Benton County | 17 | 2004 | High | Satisfactory |
| Gamache Dam Yakima County | 11 | 1987 | High | Fair |
| Frozen Lake Dam Pierce County | 14 | 1930 | High | Not Available |
| Friesland Dairy Lagoons Yakima County | 6 | 2013 | High | Fair |
| French Canyon Dam Yakima County | 74 | 1985 | High | Not Available |
| Flat Top Ranch Frost Control Pond Walla Walla County | 18 | 1996 | High | Fair |
| Fire Mountain Boy Scout Camp Dam C Skagit County | 17 | 1971 | High | Satisfactory |
| Fire Mountain Boy Scout Camp Dam B Skagit County | 9 | 1971 | High | Satisfactory |
| Fire Mountain Boy Scout Camp Dam A Skagit County | 18 | 1971 | High | Fair |
| Finley Ranch Reservoir Benton County | 23 | 2013 | High | Satisfactory |
| Ferndale Aerated Sewage Lagoon No 3 Whatcom County | 17 | 1986 | High | Satisfactory |
| Farmland Ranch 19 Dam Yakima County | 35 | 1992 | High | Satisfactory |
| Fanchers Dam Okanogan County | 68 | 1926 | High | Fair |
| Fairview Reservoir No 2 Grays Harbor County | 25 | 1921 | High | Fair |
| Fairview Reservoir No 1 Grays Harbor County | 35 | 1915 | High | Poor |
| Everett Reservoir No 4 Snohomish County | 24 | 1952 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.