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 51–62 of 62
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Columbia Marsh Unit #1 Pond No. 3 Dam Grant County | 13 | 1958 | Low | Poor |
| Columbia Marsh Unit #1 Dam Grant County | 25 | 1958 | Low | Poor |
| College Hill Reservoir Grays Harbor County | 31 | 1899 | High | Poor |
| Colchuck Lake Dam Chelan County | 18 | 1930 | High | Poor |
| Cascade Lake Dam San Juan County | 21 | 1915 | High | Poor |
| Carlisle Lake Dam Lewis County | 19 | 1920 | High | Poor |
| Butterworth Dam Pierce County | 60 | 1949 | Significant | Poor |
| Blair Reservoir Dam Benton County | 28 | 1937 | High | Poor |
| Blackhorse East Dam Spokane County | 12 | 1960 | Low | Poor |
| Belfair Wwtp Treated Water Storage Pond Mason County | 22 | 2014 | High | Poor |
| Beitey Lake Dam Stevens County | 17 | 1934 | High | Poor |
| Beacon Hill Reservoir Grays Harbor County | 30 | 1935 | High | Poor |
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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.