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 376–400 of 817
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lawrence Orchards Dam Grant County | 13 | 1995 | High | Fair |
| Lawson Lake Dam San Juan County | 17 | 1948 | Low | Fair |
| Leach Creek Stormwater Detention Dam Pierce County | 13 | 1960 | High | Fair |
| Leader Lake Dam Okanogan County | 61 | 1910 | High | Satisfactory |
| Leader Lake Saddle Dam Okanogan County | 16 | 1910 | High | Satisfactory |
| Lenice Dam Grant County | 10 | 1976 | Low | Not Rated |
| Leprechaun Lake Dam Mason County | 16 | 1966 | High | Satisfactory |
| Lewis Dam Kitsap County | 15 | 1973 | Low | Not Rated |
| Liberty Acres Lagoon 3 Yakima County | 7 | 1990 | Significant | Fair |
| Liberty Acres Lagoon 7 Yakima County | 6 | 2000 | Significant | Fair |
| Lily Lake Dam Chelan County | 14 | 1892 | High | Satisfactory |
| Limekiln Dam San Juan County | 19 | 1976 | Low | Not Rated |
| Limerick Lake Dam Mason County | 34 | 1966 | High | Satisfactory |
| Lincoln Rock S.P. Evaporative Lagoons Douglas County | 15 | 1981 | Significant | Satisfactory |
| Lindblad Brothers Dam Grant County | 14 | 1940 | Low | Fair |
| Little Falls Dam Stevens County | 64 | 1910 | High | Fair |
| Little Falls Spillway Dam Lincoln County | 72 | 1910 | Low | Fair |
| Little Goose Lock and Dam Columbia County | 226 | 1970 | High | Not Available |
| Little Green Lake Dam Okanogan County | 11 | 1959 | High | Fair |
| Little Sweden Dam Stevens County | 7 | 1986 | Low | Not Rated |
| Little Twin Lakes Dam Mason County | 25 | 1966 | Low | Not Rated |
| Locke Dam Pend Oreille County | 25 | 1973 | High | Satisfactory |
| Loers Dam Island County | 9 | 1958 | Low | Not Rated |
| Lohrer Dam Clallam County | 5 | 1974 | High | Satisfactory |
| Long Bell Mill Pond Dam Lewis County | 18 | 1943 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.