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 301–312 of 312
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Bayley Lake Dam Stevens County | 9 | 1924 | Low | Not Rated |
| Barrier Dam Lewis County | 16 | 1968 | Low | Satisfactory |
| Barnaby Slough No 2 Dam Skagit County | 14 | 1968 | Low | Not Rated |
| Baker Lake Dam Whatcom County | 10 | 1966 | Low | Not Rated |
| Bacchus Dam Franklin County | 22 | 1973 | Low | Not Rated |
| Ayer Reservoir Dam San Juan County | 32 | 1964 | Low | Not Rated |
| Armstrong Lake Dam Mason County | 10 | 1968 | Low | Not Rated |
| Anderson Dam Clark County | 15 | 1987 | Low | Not Rated |
| Alkali Lake Grant County | 12 | 1950 | Low | Not Rated |
| Aldarra Pond Dfr1 King County | 15 | 2001 | Low | Not Rated |
| Albion Sewage Treatment Lagoons Whitman County | 8 | 1972 | Low | Not Rated |
| 804 Reservoir Dam Franklin County | 12 | 1979 | Low | Not Rated |
PreviousPage 13 of 13
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.