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 801–817 of 817
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Asamera Cannon Mine Tailings Dam Chelan County | 340 | 1986 | High | Satisfactory |
| Armstrong Lake Dam Mason County | 10 | 1968 | Low | Not Rated |
| Antilon Lake Dam Chelan County | 62 | 1913 | High | Fair |
| Anderson Lake Dam Mason County | 28 | 1966 | High | Satisfactory |
| Anderson Dam Clark County | 15 | 1987 | Low | Not Rated |
| Alkali Lake Grant County | 12 | 1950 | Low | Not Rated |
| Alder Pierce County | 330 | 1945 | High | Satisfactory |
| Aldarra Pond Dfr1 King County | 15 | 2001 | Low | Not Rated |
| Albion Sewage Treatment Lagoons Whitman County | 8 | 1972 | Low | Not Rated |
| Agrinw Spaw Pond Benton County | — | — | Significant | Not Rated |
| Agrinw Feedlot Fresh Water Pond Benton County | — | — | Significant | Not Rated |
| Agreserves Plymouth Wastewater Storage Pond Benton County | 19 | 2023 | Significant | Not Rated |
| Aberdeen Lake Dam Grays Harbor County | 33 | 1928 | High | Satisfactory |
| 804 Reservoir Dam Franklin County | 12 | 1979 | Low | Not Rated |
| 60th Street Stormwater Detention Dam Snohomish County | 104 | 1988 | Significant | Satisfactory |
| 3 Amigos Reservoir Chelan County | 18 | 2003 | High | Satisfactory |
| 204th Street Stormwater Detention Basin King County | 9 | 2001 | Significant | Fair |
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Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.