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 126–150 of 241
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Mayfield Forebay Dam Lewis County | 63 | 1963 | High | Satisfactory |
| Masonry Dam King County | 230 | 1914 | High | Satisfactory |
| Malinowski Dam Grays Harbor County | 51 | 1963 | High | Satisfactory |
| Madsen Creek West Basin Dam King County | 13 | 2008 | High | Satisfactory |
| Lower Pine Lake Dam Spokane County | 18 | 1940 | Low | Satisfactory |
| Loutsis Dam King County | 22 | 1970 | Low | Satisfactory |
| Louise Lake Dam Whatcom County | 14 | 1972 | High | Satisfactory |
| Lords Lake North Dam Jefferson County | 42 | 1957 | High | Satisfactory |
| Loon Lake Storage Lagoon No 3 Stevens County | 13 | 1998 | High | Satisfactory |
| Loon Lake Storage Lagoon No 2 Stevens County | 12 | 1986 | High | Satisfactory |
| Loon Lake Storage Lagoon No 1 Stevens County | 12 | 1986 | High | Satisfactory |
| Loon Lake Aeration Lagoon Stevens County | 12 | 1986 | High | Satisfactory |
| Long Lake Crescent Lincoln County | 108 | 1915 | High | Satisfactory |
| Lohrer Dam Clallam County | 5 | 1974 | High | Satisfactory |
| Locke Dam Pend Oreille County | 25 | 1973 | High | Satisfactory |
| Lincoln Rock S.P. Evaporative Lagoons Douglas County | 15 | 1981 | Significant | Satisfactory |
| Limerick Lake Dam Mason County | 34 | 1966 | High | Satisfactory |
| Lily Lake Dam Chelan County | 14 | 1892 | High | Satisfactory |
| Leprechaun Lake Dam Mason County | 16 | 1966 | High | Satisfactory |
| Leader Lake Saddle Dam Okanogan County | 16 | 1910 | High | Satisfactory |
| Leader Lake Dam Okanogan County | 61 | 1910 | High | Satisfactory |
| Lamb Weston Richland Lrad Lagoon Benton County | 29 | 2017 | Significant | Satisfactory |
| Lakemont Stormwater Pond King County | 13 | 1992 | High | Satisfactory |
| Lake Forest Park Reservoir King County | 30 | 1962 | High | Satisfactory |
| La Grande Thurston County | 217 | 1944 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.