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 251–275 of 817
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Fish Barrier Dam Skagit County | 36 | 1959 | Low | Satisfactory |
| Fish Lake Dam Okanogan County | 7 | 1920 | Low | Not Rated |
| Flat Top Ranch Frost Control Pond Walla Walla County | 18 | 1996 | High | Fair |
| Flying Goose Ranch Wetland Dam No 1 Pend Oreille County | 10 | 1995 | Low | Not Rated |
| Fowler Reservoir Dam San Juan County | 15 | 1960 | Low | Not Rated |
| French Canyon Dam Yakima County | 74 | 1985 | High | Not Available |
| French Slough Agricultural Waste Storage Snohomish County | 16 | 1997 | Low | Not Rated |
| Fresh Water Pond Jefferson County | 30 | — | Significant | Not Available |
| Friesland Dairy Lagoons Yakima County | 6 | 2013 | High | Fair |
| Frozen Lake Dam Pierce County | 14 | 1930 | High | Not Available |
| Gamache Dam Yakima County | 11 | 1987 | High | Fair |
| Gap Road Reservoir Benton County | 17 | 2004 | High | Satisfactory |
| Gardner Dam Snohomish County | 11 | 1961 | Low | Not Rated |
| Garrison Creek 98th Avenue Detention D King County | 30 | 1996 | High | Fair |
| Garrison Creek Stormwater Detention Dam King County | 55 | 1991 | Significant | Satisfactory |
| Garvey Dam Stevens County | 22 | 1986 | Low | Not Rated |
| Geneva Lake Dam Whatcom County | 10 | 1988 | High | Satisfactory |
| George City Wastewater Treatment Lago Grant County | 9 | 1996 | Low | Not Rated |
| George Deruyter & Son Dairy Lagoon 2 Yakima County | 24 | 2022 | High | Not Rated |
| George Deruyter & Son Dairy Lagoon 3 Yakima County | 22 | 2022 | High | Not Rated |
| Glenhaven Lakes Dam Whatcom County | 14 | 1963 | Low | Not Rated |
| Goldendale Wastewater Pond 1a Klickitat County | 17 | 1983 | Low | Not Rated |
| Goldendale Wastewater Pond 1b Klickitat County | 19 | 1983 | Low | Not Rated |
| Goldendale Wastewater Pond 2 Klickitat County | 19 | 1983 | Low | Not Rated |
| Goodrow Dam San Juan County | 27 | 1964 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.