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 201–225 of 404
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lower Monumental Lock and Dam Franklin County | 226 | 1969 | High | Not Available |
| Lower Granite Lock and Dam - North Levee Nez Perce County | 16 | 1974 | High | Not Available |
| Lower Baker Skagit County | 285 | 1927 | High | Poor |
| Louise Lake Dam Whatcom County | 14 | 1972 | High | Satisfactory |
| Lords Lake North Dam Jefferson County | 42 | 1957 | High | Satisfactory |
| Lords Lake East Dam Jefferson County | 42 | 1956 | High | Poor |
| 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 |
| Little Green Lake Dam Okanogan County | 11 | 1959 | High | Fair |
| Little Goose Lock and Dam Columbia County | 226 | 1970 | High | Not Available |
| Little Falls Dam Stevens County | 64 | 1910 | High | Fair |
| 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 |
| Leach Creek Stormwater Detention Dam Pierce County | 13 | 1960 | High | Fair |
| Lawrence Orchards Dam Grant County | 13 | 1995 | High | Fair |
| Latitude 47 Commerce Center Stormwater Pond Pierce County | 15 | 2020 | High | Fair |
| Lang Dam No 1 Skagit County | 13 | 1956 | High | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.