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 817
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Connell Wastewater Lagoon 5 Franklin County | 8 | 2009 | Significant | Fair |
| Connell Wastewater Lagoons Franklin County | 20 | 2000 | Significant | Fair |
| Conner Jarvis East Pond King County | 11 | 2018 | Significant | Satisfactory |
| Coulee City Wastewater Lagoon Grant County | 7 | 1997 | High | Satisfactory |
| Coulee City Wastewater Lagoon Cell 4 Grant County | 15 | 2008 | Significant | Satisfactory |
| Coweeman Gravel Pit No. 2 Dam Cowlitz County | 12 | 1962 | Low | Not Rated |
| Cow Lake Dam Adams County | 7 | 1935 | Low | Not Rated |
| Cowlitz Falls Lewis County | 145 | 1994 | Significant | Satisfactory |
| Cow Palace Lagoon 1 Yakima County | 23 | 2000 | Significant | Fair |
| Cow Palace Lagoon 2 Yakima County | 28 | 2017 | High | Satisfactory |
| Coyote Lake Dam Adams County | 16 | 1976 | Low | Poor |
| Crab Creek Flood Flat Water Control Structure Grant County | 11 | 2024 | Low | Not Rated |
| Cranberry Lake Dam Skagit County | 13 | 1910 | High | Fair |
| Cranberry Lake Stormwater Detention Dam Mason County | 10 | 1990 | High | Satisfactory |
| Crystal Lake Dam Snohomish County | 7 | 1931 | High | Fair |
| Culmback Snohomish County | 262 | 1983 | High | Satisfactory |
| Cushman No. 1 Spillway Mason County | 55 | 1990 | High | Satisfactory |
| Cushman No 2 Mason County | 275 | 1930 | High | Satisfactory |
| Cusick Polishing Lagoon Pend Oreille County | 10 | 1978 | Significant | Fair |
| Cziglenski Beaver Pond Dam Stevens County | 8 | 1995 | Low | Not Rated |
| D1 Big Meadow Lake Dam Pend Oreille County | 15 | 1975 | Significant | Not Rated |
| Dad'S Lake Dam Stevens County | 32 | 1976 | High | Satisfactory |
| Dagger Lake Dam Snohomish County | 10 | 1912 | Low | Not Rated |
| Davenport Sewage Lagoon No 1 Lincoln County | 7 | 1993 | High | Fair |
| Davenport Sewage Lagoon No 2 Lincoln County | 4 | 1987 | High | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.