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 776–800 of 817
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Watts Bros Organic Dairy Lagoon 1 Benton County | 21 | 2007 | Significant | Fair |
| Watts Bros Organic Dairy Lagoon 2 Benton County | 21 | 2007 | Significant | Fair |
| Watts Bros Organic Dairy Lagoon 3 Benton County | 21 | 2007 | Significant | Fair |
| Welcome Lake Dam King County | 24 | 1959 | High | Fair |
| Wells Chelan County | 160 | 1968 | High | Poor |
| Wenas Dam Yakima County | 90 | 1911 | High | Fair |
| Wenatchee Heights Reservoir No 2 Dam Chelan County | 28 | 1998 | High | Fair |
| West Bank Project Reservoir Franklin County | 34 | 2003 | High | Satisfactory |
| Western Nuclear Tailings Pond Stevens County | 62 | 1977 | Significant | Satisfactory |
| West Fork Dam Grays Harbor County | 16 | 1956 | Significant | Fair |
| West Lynden Regional Detention Facility Whatcom County | 7 | 2003 | Low | Not Rated |
| West Richland Sewage Lagoon North Benton County | 7 | 1961 | Significant | Fair |
| Weyerhaeuser Dam King County | 15 | 1970 | Low | Not Rated |
| Weyerhaeuser Enumclaw Flood Control Dam King County | 30 | 1993 | High | Fair |
| Whatcom Lake Dam Whatcom County | 19 | 1937 | High | Satisfactory |
| Whistle Lake Dam Skagit County | 15 | 1925 | High | Poor |
| 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 |
| William Symington Dam Kitsap County | 39 | 1965 | High | Satisfactory |
| Wind River Logging CO Pond Skamania County | 12 | 1930 | Low | Not Rated |
| Windsor Waterski Pond Thurston County | 11 | 1992 | High | Fair |
| Winlock Waterski Pond Dam Lewis County | 11 | 1990 | Low | Not Rated |
| Woodcrest Lakes Dam Skagit County | 7 | 1980 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.