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 176–200 of 817
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Davenport Sewage Lagoon No 3 Lincoln County | 19 | 1987 | High | Fair |
| Davenport Sewage Lagoon No 4 Lincoln County | 22 | 1987 | High | Fair |
| Davis Lake Dam Okanogan Co Okanogan County | 7 | 1974 | Low | Not Rated |
| Dawn Lake Dam Clallam County | 21 | 1950 | High | Satisfactory |
| Dawn Mines Evaporation Pond 6 Stevens County | 15 | 2013 | High | Fair |
| Deer Park Aeration Lagoon Spokane County | 17 | 2023 | High | Fair |
| Deer Park Ww Storage Lagoon No 3 Spokane County | 24 | 1997 | High | Satisfactory |
| Deer Park Ww Storage Lagoons 1 & 2 Spokane County | 23 | 1985 | High | Satisfactory |
| Del Monte Foods INC Yakima County | 12 | 1968 | High | Satisfactory |
| Den Hoed Dam No 1 Yakima County | 12 | 1999 | High | Poor |
| Deschutes Dam Thurston County | 45 | 1951 | Low | Not Rated |
| Des Moines Ck Reg Det Facility East Berm King County | 18 | 2009 | High | Satisfactory |
| Des Moines Ck Reg Det Pond West Berm King County | 8 | 2009 | High | Satisfactory |
| Des Moines Creek Stormwater Detention Da King County | 18 | 1989 | High | Satisfactory |
| Devils Hole Dam Kitsap County | 22 | 1959 | Low | Poor |
| Dhondt Dam Stevens County | 18 | 1983 | Low | Not Rated |
| Diablo Whatcom County | 389 | 1929 | High | Satisfactory |
| Diamond Lake Aeration Lagoon No 2 Pend Oreille County | 16 | 1987 | High | Satisfactory |
| Diamond Lake Aeration Lagoon No 3 Pend Oreille County | 17 | 1987 | High | Satisfactory |
| Diamond Lake Sewage Lagoon No 1 Pend Oreille County | 12 | 1988 | High | Satisfactory |
| Dionysus Dam Franklin County | 18 | 1973 | High | Fair |
| D&J Dairy Consolidated Lagoon No. 1 Yakima County | 6 | 2021 | Significant | Not Rated |
| Dohman Creek Dam Pacific County | 41 | 1978 | Low | Not Rated |
| Dosser Reservoir Dam Spokane County | 14 | 1959 | Low | Not Rated |
| Dragoon Lake Dam Spokane County | 18 | 1913 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.