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 |
|---|---|---|---|---|
| Square Lake Dam Chelan County | 7 | 1938 | High | Poor |
| Stevenson Dam Yakima County | 17 | 1969 | High | Poor |
| Swano Lake Dam Grays Harbor County | 24 | 1949 | High | Poor |
| Sylvia Lake Dam Grays Harbor Cnty Grays Harbor County | 23 | 1918 | Significant | Poor |
| Twin Lakes Ferry County | 25 | 1931 | High | Poor |
| Upper Snow Dam Chelan County | 10 | 1939 | Low | Poor |
| Upriver Dam Spokane County | 38 | 1937 | High | Poor |
| Valley View Dairy Waste Pond Skagit County | 13 | 2003 | Significant | Poor |
| Van Stone Pit Lake Dam Stevens County | 25 | 1999 | High | Poor |
| Van Stone Tailings Dam Stevens County | 90 | 1970 | Significant | Poor |
| Wells Chelan County | 160 | 1968 | High | Poor |
| Whistle Lake Dam Skagit County | 15 | 1925 | 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.