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 651–675 of 817
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Cushman No. 1 Spillway Mason County | 55 | 1990 | High | Satisfactory |
| Culmback Snohomish County | 262 | 1983 | High | Satisfactory |
| Crystal Lake Dam Snohomish County | 7 | 1931 | High | Fair |
| Cranberry Lake Stormwater Detention Dam Mason County | 10 | 1990 | High | Satisfactory |
| Cranberry Lake Dam Skagit County | 13 | 1910 | High | Fair |
| Crab Creek Flood Flat Water Control Structure Grant County | 11 | 2024 | Low | Not Rated |
| Coyote Lake Dam Adams County | 16 | 1976 | Low | Poor |
| Cow Palace Lagoon 2 Yakima County | 28 | 2017 | High | Satisfactory |
| Cow Palace Lagoon 1 Yakima County | 23 | 2000 | Significant | Fair |
| Cowlitz Falls Lewis County | 145 | 1994 | Significant | Satisfactory |
| Cow Lake Dam Adams County | 7 | 1935 | Low | Not Rated |
| Coweeman Gravel Pit No. 2 Dam Cowlitz County | 12 | 1962 | Low | Not Rated |
| Coulee City Wastewater Lagoon Cell 4 Grant County | 15 | 2008 | Significant | Satisfactory |
| Coulee City Wastewater Lagoon Grant County | 7 | 1997 | High | Satisfactory |
| Conner Jarvis East Pond King County | 11 | 2018 | Significant | Satisfactory |
| 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 |
| Conger Lake Dam Pend Oreille County | 22 | 1926 | Low | Not Rated |
| Conconully Dam Okanogan County | 72 | 1911 | High | Not Available |
| Con Agra Foods New Storage Basin Franklin County | 13 | 2006 | Low | Not Rated |
| Con Agra Foods Main Storage Basin Dam Franklin County | 23 | 1970 | Low | Not Rated |
| Colville Wastewater Lagoons Stevens County | 7 | 1967 | Low | Not Rated |
| Columbia River Orchard Reservoir 2 Douglas County | 13 | 2008 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.