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 817
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Gorge Whatcom County | 300 | 1961 | High | Satisfactory |
| Grand Coulee Dam Okanogan County | 550 | 1941 | High | Not Available |
| Grandview Wastewater A-Cell Lagoon Dam Yakima County | 7 | 1991 | Significant | Fair |
| Grandview Wastewater Aqua Lagoon Dam Yakima County | 10 | 1999 | Significant | Fair |
| Grandview Wastewater E&F Lagoons Dam Yakima County | 9 | 1997 | Significant | Fair |
| Great Depression Dam Chelan County | 22 | 1998 | High | Fair |
| Green Mountain Pond Clark County | 7 | 1987 | Low | Not Rated |
| Haight Reservoir Dam Clark County | 12 | 1951 | High | Poor |
| Haller Dam Clallam County | 45 | 1945 | Low | Not Rated |
| Hannegan Road Detention Basin Whatcom County | 28 | 1996 | High | Satisfactory |
| Hansen Dam Lincoln County | 11 | 1962 | Low | Not Rated |
| Happy Valley Stormwater Detention Basin Whatcom County | 14 | 1981 | High | Satisfactory |
| Harbor Hill North Pond Pierce County | 21 | 2014 | High | Satisfactory |
| Hattie'S Pond Kitsap County | 43 | 1931 | Significant | Fair |
| Havvaski Waterski Pond Thurston County | 12 | 1992 | Low | Not Rated |
| Hawkins Dam Okanogan County | 16 | 1940 | High | Fair |
| Headquarters Landfill Leachate Pond Cowlitz County | 19 | 1993 | Significant | Satisfactory |
| Hecla-Day Mine Aspen Tailings Dam Ferry County | 95 | 1940 | Significant | Fair |
| Hecla-Day Mine Aspen Tailings Saddle Dam Ferry County | 40 | 1987 | Significant | Fair |
| Hecla Groundwater Management Impoundment Ferry County | 24 | 2015 | Significant | Fair |
| Heidelberg Materials Lewisville Phase 1 Dam Clark County | 39 | 2007 | High | Satisfactory |
| Heidenreich Dam San Juan County | 16 | 1972 | Low | Not Rated |
| Helsell Dam San Juan County | 16 | 1999 | Low | Not Rated |
| H & H Reservoir Dam No 1 Chelan County | 19 | 1926 | High | Satisfactory |
| Higginbotham Reservoir Dam Grant County | 13 | 1947 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.