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 101–125 of 817
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Tapps Lake Dike No 3 Pierce County | 15 | 1911 | High | Satisfactory |
| Tapps Lake Dike No 2b Pierce County | 15 | 1911 | High | Satisfactory |
| Tapps Lake Dike No 2a Pierce County | 9 | 1911 | High | Satisfactory |
| Tapps Lake Dike No 15 Pierce County | 27 | 1911 | Low | Satisfactory |
| Tapps Lake Dike No 14 Pierce County | 256 | 1911 | Low | Satisfactory |
| Tapps Lake Dike No 13 Pierce County | 5 | 1911 | High | Satisfactory |
| Tapps Lake Dike No 12 Pierce County | 14 | 1911 | High | Satisfactory |
| Tapps Lake Dike No 11 Pierce County | 25 | 1911 | High | Satisfactory |
| Tapps Lake Dike No10 Pierce County | 18 | 1911 | High | Satisfactory |
| Tapps Lake Dike No 1 Pierce County | 18 | 1911 | High | Satisfactory |
| Tapps Lake Backflow Prevention Structure Pierce County | 22 | 2007 | High | Satisfactory |
| Talus P5 Stormwater Detention Dam King County | 24 | 2002 | High | Satisfactory |
| Tahuyeh Lake Dam Kitsap County | 22 | 1961 | High | Satisfactory |
| Taggares Dam No 2 Adams County | 14 | 1968 | Low | Not Rated |
| Taggares Dam No 1 Adams County | 14 | 1968 | Low | Not Rated |
| Tacoma Sportsman Pond Pend Oreille County | 10 | 1954 | Low | Not Rated |
| Sylvia Lake Dam Pierce Co Pierce County | 16 | 1963 | Significant | Fair |
| Sylvia Lake Dam Grays Harbor Cnty Grays Harbor County | 23 | 1918 | Significant | Poor |
| Swofford Pond Lewis County | 26 | — | Low | Satisfactory |
| Swift No 2 Hydroelectric Project Cowlitz County | 121 | 1959 | Low | Satisfactory |
| Swift No. 1 Skamania County | 412 | 1958 | High | Fair |
| Swano Lake Dam Grays Harbor County | 24 | 1949 | High | Poor |
| Svid Mabton Canal 12.48 Reservoir Yakima County | 9 | 2010 | High | Satisfactory |
| Sunnyside Mp 59.29 Reservoir Benton County | 44 | 2005 | High | Fair |
| Sunnyside Mp 37.1 Reservoir Yakima County | 34 | 2011 | High | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.