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 26–50 of 191
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Chiawana Gleed Ranch Dam Yakima County | 21 | 2003 | High | Fair |
| Columbia Marsh Unit #2 Dam Grant County | 15 | 1957 | Low | Fair |
| Connell Wastewater Lagoon 1a Franklin County | 23 | 2009 | Significant | Fair |
| Connell Wastewater Lagoon 4 Franklin County | 10 | 2009 | Significant | Fair |
| Connell Wastewater Lagoon 5 Franklin County | 8 | 2009 | Significant | Fair |
| Connell Wastewater Lagoons Franklin County | 20 | 2000 | Significant | Fair |
| Cow Palace Lagoon 1 Yakima County | 23 | 2000 | Significant | Fair |
| Cranberry Lake Dam Skagit County | 13 | 1910 | High | Fair |
| Crystal Lake Dam Snohomish County | 7 | 1931 | High | Fair |
| Cusick Polishing Lagoon Pend Oreille County | 10 | 1978 | Significant | Fair |
| Davenport Sewage Lagoon No 1 Lincoln County | 7 | 1993 | High | Fair |
| Davenport Sewage Lagoon No 2 Lincoln County | 4 | 1987 | High | Fair |
| Davenport Sewage Lagoon No 3 Lincoln County | 19 | 1987 | High | Fair |
| Davenport Sewage Lagoon No 4 Lincoln County | 22 | 1987 | High | Fair |
| Dawn Mines Evaporation Pond 6 Stevens County | 15 | 2013 | High | Fair |
| Deer Park Aeration Lagoon Spokane County | 17 | 2023 | High | Fair |
| Dionysus Dam Franklin County | 18 | 1973 | High | Fair |
| Edaleen Dairy Waste Storage Pond No. 2 Whatcom County | 8 | 1989 | High | Fair |
| Edaleen Dairy Waste Storage Pond No 3 Whatcom County | 12 | 2007 | High | Fair |
| Engelsma Dairy Lagoon Dam Whatcom County | 7 | 1994 | Significant | Fair |
| Enloe Dam Okanogan County | 63 | 1920 | Significant | Fair |
| Fairfield Sewage Aerated Lagoon - Lagoon 1 Spokane County | 13 | 2003 | Significant | Fair |
| Fairfield Sewage Equalization Basin - Lagoon 2 Spokane County | 12 | 1966 | Significant | Fair |
| Fairview Reservoir No 2 Grays Harbor County | 25 | 1921 | High | Fair |
| Fanchers Dam Okanogan County | 68 | 1926 | High | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.