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 151–175 of 191
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Deer Park Aeration Lagoon Spokane County | 17 | 2023 | High | Fair |
| Dawn Mines Evaporation Pond 6 Stevens County | 15 | 2013 | High | Fair |
| Davenport Sewage Lagoon No 4 Lincoln County | 22 | 1987 | High | Fair |
| Davenport Sewage Lagoon No 3 Lincoln County | 19 | 1987 | High | Fair |
| Davenport Sewage Lagoon No 2 Lincoln County | 4 | 1987 | High | Fair |
| Davenport Sewage Lagoon No 1 Lincoln County | 7 | 1993 | High | Fair |
| Cusick Polishing Lagoon Pend Oreille County | 10 | 1978 | Significant | Fair |
| Crystal Lake Dam Snohomish County | 7 | 1931 | High | Fair |
| Cranberry Lake Dam Skagit County | 13 | 1910 | High | Fair |
| Cow Palace Lagoon 1 Yakima County | 23 | 2000 | Significant | Fair |
| Connell Wastewater Lagoons Franklin County | 20 | 2000 | Significant | Fair |
| Connell Wastewater Lagoon 5 Franklin County | 8 | 2009 | Significant | Fair |
| Connell Wastewater Lagoon 4 Franklin County | 10 | 2009 | Significant | Fair |
| Connell Wastewater Lagoon 1a Franklin County | 23 | 2009 | Significant | Fair |
| Columbia Marsh Unit #2 Dam Grant County | 15 | 1957 | Low | Fair |
| Chiawana Gleed Ranch Dam Yakima County | 21 | 2003 | High | Fair |
| Chiawana Frenchman Hills Dam Grant County | 24 | 1995 | High | Fair |
| Chelan Chelan County | 66 | 1927 | Significant | Fair |
| Centralia Coal Mine Pond 46 Dam Lewis County | 30 | 2004 | High | Fair |
| Centralia Coal Mine Dam No 3b Lewis County | 140 | 1980 | Significant | Fair |
| Centralia Coal Mine Dam No 32b Thurston County | 27 | 1991 | Low | Fair |
| Cedar Way Stormwater Detention Dam Snohomish County | 31 | 1985 | High | Fair |
| Cedar Hills Landfill Csw Pond King County | 14 | 2016 | Significant | Fair |
| Cedar Heights Dam Skagit County | 15 | 2007 | High | Fair |
| Casad Dam Kitsap County | 190 | 1956 | High | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.