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 76–100 of 312
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Sherry Lake Dam Stevens County | 12 | 1952 | Low | Not Rated |
| Shell Refinery Water Storage Reservoir Skagit County | 28 | 1958 | Low | Not Rated |
| Sheep Springs Dam Adams County | 30 | 1906 | Low | Not Rated |
| Serene Lake Pierce County | 9 | 1971 | Low | Not Rated |
| Seeley Ski Lake Thurston County | 9 | 1992 | Low | Not Rated |
| Section 34 Re Regulating Reservoir Franklin County | 17 | 2005 | Low | Not Rated |
| Sea Horse Ranch Dike Grays Harbor County | 15 | 1961 | Low | Not Rated |
| Scooteney North Dike Franklin County | 16 | 1952 | Low | Not Available |
| Scooteney Headworks Dike Franklin County | 26 | 1952 | Low | Not Available |
| Scooteney Dike 1 Franklin County | 10 | 1952 | Low | Not Available |
| Schallow Lake Dam Okanogan County | 13 | 1954 | Low | Not Rated |
| Scabrock Feeders Dam 6c Adams County | 11 | 1970 | Low | Not Rated |
| Scabrock Feeders Dam 6a Adams County | 15 | 1970 | Low | Not Rated |
| Scabrock Feeders Dam 3 Adams County | 16 | 1968 | Low | Not Rated |
| Sawyer Lake Outlet Structure King County | 10 | 1952 | Low | Not Rated |
| Sasse Reservoir Dam Okanogan County | 10 | 1910 | Low | Not Rated |
| San Refugio Ranch Dam Klickitat County | 16 | 1977 | Low | Not Rated |
| Ruth Lake Dam Kitsap County | 18 | 1977 | Low | Poor |
| Roza Wasteway 6 Reregulation Reservoir Benton County | 20 | 1988 | Low | Not Rated |
| Roza Diversion Dam Kittitas County | 67 | 1939 | Low | Not Available |
| Roslyn Wastewater Lagoon No 3 Kittitas County | 10 | 1973 | Low | Not Rated |
| Rio Mount Dam Snohomish County | 22 | 1979 | Low | Not Rated |
| Ringold Springs Fish Pond Franklin County | 12 | 1961 | Low | Not Rated |
| Ringold Pond Dam Franklin County | 10 | 1962 | Low | Not Rated |
| Rec Silicon Wastewater Pond Grant County | 23 | 2009 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.