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 551–575 of 817
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Pumping Pond Dike Whatcom County | 22 | 1960 | Low | Satisfactory |
| Quadrant East Campus Parcel 1 King County | 11 | 2000 | Significant | Satisfactory |
| Quadrant Lake No 1 King County | 8 | 1994 | Low | Not Rated |
| Queens Bog Dam King County | 12 | 1987 | Low | Not Rated |
| Quincy Aerated Lagoon No 1 Grant County | 12 | 1987 | Significant | Not Rated |
| Quincy Aerated Lagoon No 2 Grant County | 12 | 1987 | Significant | Not Rated |
| Quincy Brine Evaporation Ponds Grant County | 11 | 1989 | Significant | Fair |
| Quincy Sludge Storage Lagoon System Lagoons 1 2 and 3 Grant County | 15 | 1986 | Significant | Fair |
| Rabel Dam Okanogan County | 15 | 1940 | High | Poor |
| Radar Lake Dam King County | 34 | 1973 | High | Satisfactory |
| Rainbow Lake Dam Columbia County | 14 | 1955 | Low | Not Rated |
| Rainbow Springs Dam Snohomish County | 14 | 1969 | High | Poor |
| Ravensdale Pit King County | 18 | 1972 | Low | Not Rated |
| Reardan Sewage Lagoon Lincoln County | 8 | 2006 | High | Fair |
| Rearing Pond Dike Grant County | 12 | 1964 | Low | Not Rated |
| Rec Silicon Wastewater Pond Grant County | 23 | 2009 | Low | Fair |
| Redmond Ridge Cedar Dam King County | 26 | 2000 | High | Fair |
| Redmond Ridge Drive Ec 4n Roadway Dam King County | 8 | 2003 | High | Satisfactory |
| Redmond Ridge East Pond Srn 2 No 1 King County | 14 | 2008 | High | Fair |
| Redmond Ridge East Srs 1 Pond No 1 King County | 11 | 2013 | High | Satisfactory |
| Reflection Lake North Dam Spokane County | 8 | 1955 | High | Fair |
| Reflection Lake South Dam Spokane County | 28 | 1955 | High | Fair |
| Regulating Basin West Dam King County | 32 | 1962 | High | Satisfactory |
| Ringold Pond Dam Franklin County | 10 | 1962 | Low | Not Rated |
| Ringold Springs Fish Pond Franklin County | 12 | 1961 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.