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 |
|---|---|---|---|---|
| Weyerhaeuser Dam King County | 15 | 1970 | Low | Not Rated |
| Whiteman Cove Dam Pierce County | 15 | 1950 | Low | Not Rated |
| Whitestone Lake Dam Okanogan County | 9 | 1930 | Low | Not Rated |
| Williams Dam Spokane County | 14 | 1982 | Low | Not Rated |
| Williams Lake Sewer Dist 2 Lagoons Spokane County | 30 | 2007 | Low | Not Rated |
| Wind River Logging CO Pond Skamania County | 12 | 1930 | Low | Not Rated |
| Winlock Waterski Pond Dam Lewis County | 11 | 1990 | Low | Not Rated |
| Woodcrest Lakes Dam Skagit County | 7 | 1980 | Low | Not Rated |
| Woods Reservoir Dam San Juan County | 20 | 1972 | Low | Not Rated |
| Wsr Dairy Waste Lagoon Snohomish County | 17 | 1998 | Low | Not Rated |
| Yergens & Anselmo Dam No 1 Pend Oreille County | 15 | 1970 | Low | Not Rated |
| Zylstra Dam No 2 San Juan County | 25 | 1963 | Low | Not Rated |
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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.