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 51–75 of 98
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Klahanie Stormwater Detention Dam No 1 King County | 9 | 1984 | Significant | Fair |
| Kinross Old Reclaim Pond Ferry County | 24 | 2008 | Significant | Satisfactory |
| Ingredion Process Water Lagoon Grant County | 9 | 2000 | Significant | Satisfactory |
| Holmes Harbor Reclaimed Water Ponds Island County | 66 | 1994 | Significant | 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 |
| Headquarters Landfill Leachate Pond Cowlitz County | 19 | 1993 | Significant | Satisfactory |
| Hattie'S Pond Kitsap County | 43 | 1931 | Significant | 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 Stormwater Detention Dam King County | 55 | 1991 | Significant | Satisfactory |
| Fresh Water Pond Jefferson County | 30 | — | Significant | Not Available |
| Fairfield Sewage Equalization Basin - Lagoon 2 Spokane County | 12 | 1966 | Significant | Fair |
| Fairfield Sewage Aerated Lagoon - Lagoon 1 Spokane County | 13 | 2003 | Significant | Fair |
| Erickson Dam Clark County | 18 | 1968 | Significant | Poor |
| Enloe Dam Okanogan County | 63 | 1920 | Significant | Fair |
| Engelsma Dairy Lagoon Dam Whatcom County | 7 | 1994 | Significant | Fair |
| Educket Creek Dam Clallam County | 35 | 1983 | Significant | Not Available |
| D&J Dairy Consolidated Lagoon No. 1 Yakima County | 6 | 2021 | Significant | Not Rated |
| D1 Big Meadow Lake Dam Pend Oreille County | 15 | 1975 | Significant | Not Rated |
| Cusick Polishing Lagoon Pend Oreille County | 10 | 1978 | Significant | Fair |
| Cow Palace Lagoon 1 Yakima County | 23 | 2000 | Significant | Fair |
| Cowlitz Falls Lewis County | 145 | 1994 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.