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 751–775 of 817
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Boyd Lower Reservoir Dam San Juan County | 24 | 1960 | High | Fair |
| Box Canyon Forebay Dam Pend Oreille County | 32 | 1955 | Low | Satisfactory |
| Boundary Pend Oreille County | 360 | 1967 | High | Fair |
| Bosma Old Pond 1 Yakima County | 9 | 2000 | Significant | Fair |
| Bonney Lake Wsu Infiltration Pond Pierce County | 9 | 2018 | High | Satisfactory |
| Bonaparte Lake Dam Okanogan County | 9 | 1957 | Low | Not Rated |
| 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 |
| Boeing Auburn Drainage Ditch Detention D King County | 7 | 1994 | Low | Not Rated |
| Blue Lake Dam Okanogan Co Okanogan County | 32 | 1923 | Low | Not Rated |
| Blazing Tree Ranch Pond 6 Dam San Juan County | 25 | 1977 | Low | Not Rated |
| Blazing Tree Ranch Pond 5 South Dam San Juan County | 25 | 1965 | Low | Not Rated |
| Blazing Tree Ranch Pond 5 North Dam San Juan County | 25 | 1965 | Low | Not Rated |
| Blair Reservoir Dam Benton County | 28 | 1937 | High | Poor |
| Black Lake Dam Adams County | 7 | 1938 | Low | Not Rated |
| Blackhorse East Dam Spokane County | 12 | 1960 | Low | Poor |
| Bitter Lake Reservoir King County | 27 | 1958 | High | Satisfactory |
| Binford Reservoir Dam Clark County | 28 | 1953 | Low | Not Rated |
| Billingsley Dam Douglas County | 15 | 1949 | Low | Satisfactory |
| Beth Lake Okanogan County | 16 | — | Significant | Not Rated |
| Beryl Baker Dam Stevens County | 31 | 1977 | High | Satisfactory |
| Bernsens 810 Reservoir Dam No 3 Franklin County | 10 | 1979 | Low | Not Rated |
| Bernsens 810 Reservoir Dam No 2 Franklin County | 15 | 1979 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.