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 241
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lacamas & Round Lakes Upper Dam Clark County | 28 | 1936 | High | Satisfactory |
| Lacamas & Round Lakes Lower Dam Clark County | 26 | 1936 | Low | Satisfactory |
| Koehn Ranch Reservoir Grant County | 19 | 2009 | High | Satisfactory |
| Kinross Old Reclaim Pond Ferry County | 24 | 2008 | Significant | Satisfactory |
| Kinross Gold Kettle River Tailings Dam Ferry County | 189 | 1994 | High | Satisfactory |
| Kennewick Sewage Lagoon System Benton County | 24 | 1997 | High | Satisfactory |
| Kennewick No 1 Aerated Wastewater Lagoon Benton County | 24 | 1975 | High | Satisfactory |
| Issaquah Highlands Falls Pond Dam King County | 22 | 2008 | High | Satisfactory |
| Interfor Pacific Stormwater Pond Clallam County | 8 | 2001 | High | Satisfactory |
| Ingredion Process Water Lagoon Grant County | 9 | 2000 | Significant | Satisfactory |
| Horseshoe Lake Dam Stevens County | 45 | 2003 | High | Satisfactory |
| Horn School Rest Area Sewage Lagoon Whitman County | 19 | 1996 | High | Satisfactory |
| Honeymoon Lake Dam Island County | 20 | 1969 | High | Satisfactory |
| H & H Reservoir Dam No 1 Chelan County | 19 | 1926 | High | Satisfactory |
| Heidelberg Materials Lewisville Phase 1 Dam Clark County | 39 | 2007 | High | Satisfactory |
| Headquarters Landfill Leachate Pond Cowlitz County | 19 | 1993 | Significant | Satisfactory |
| Harbor Hill North Pond Pierce County | 21 | 2014 | High | Satisfactory |
| Happy Valley Stormwater Detention Basin Whatcom County | 14 | 1981 | High | Satisfactory |
| Hannegan Road Detention Basin Whatcom County | 28 | 1996 | High | Satisfactory |
| Gorge Whatcom County | 300 | 1961 | High | Satisfactory |
| Geneva Lake Dam Whatcom County | 10 | 1988 | High | Satisfactory |
| Garrison Creek Stormwater Detention Dam King County | 55 | 1991 | Significant | Satisfactory |
| Gap Road Reservoir Benton County | 17 | 2004 | High | Satisfactory |
| Fish Barrier Dam Skagit County | 36 | 1959 | Low | Satisfactory |
| Fire Mountain Boy Scout Camp Dam C Skagit County | 17 | 1971 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.