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 376–400 of 404
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Buck Mountain Reservoir Dam No 2 San Juan County | 32 | 1985 | High | Fair |
| Buck Mountain Reservoir Dam No 1 San Juan County | 17 | 1985 | High | Fair |
| Bremerton Reservoir No 4 Kitsap County | 17 | 1917 | High | Satisfactory |
| Boyd Lower Reservoir Dam San Juan County | 24 | 1960 | High | Fair |
| Boundary Pend Oreille County | 360 | 1967 | High | Fair |
| Bonney Lake Wsu Infiltration Pond Pierce County | 9 | 2018 | High | Satisfactory |
| Boman Reservoir Dam Ferry County | 23 | 1977 | High | Fair |
| Boeing Flood Control Dam Snohomish County | 48 | 1967 | High | Satisfactory |
| Boeing Creek Park North Pond Dam King County | 54 | 1998 | High | Satisfactory |
| Boeing Creek M1 Detention Dam King County | 40 | 1983 | High | Satisfactory |
| Blair Reservoir Dam Benton County | 28 | 1937 | High | Poor |
| Bitter Lake Reservoir King County | 27 | 1958 | High | Satisfactory |
| Beryl Baker Dam Stevens County | 31 | 1977 | High | Satisfactory |
| Berger Dam Thurston County | 11 | 1970 | High | Fair |
| Bellingham Airport Sw Detention Pond 3 Whatcom County | 8 | 2011 | High | Satisfactory |
| Belfair Wwtp Treated Water Storage Pond Mason County | 22 | 2014 | High | Poor |
| Beitey Lake Dam Stevens County | 17 | 1934 | High | Poor |
| Beehive Saddle Dam Chelan County | 10 | 1953 | High | Satisfactory |
| Beehive Dam Chelan County | 38 | 1953 | High | Satisfactory |
| Beacon Hill Reservoir Grays Harbor County | 30 | 1935 | High | Poor |
| Bagley Whatcom County | 16 | 1927 | High | Not Rated |
| Badger Mountain Irr Dist Reservoir Expan Benton County | 14 | 1977 | High | Fair |
| Baby Gap Ranch Reservoir Benton County | 13 | 2015 | High | Satisfactory |
| Asamera Cannon Mine Tailings Dam Chelan County | 340 | 1986 | High | Satisfactory |
| Antilon Lake Dam Chelan County | 62 | 1913 | High | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.