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 312
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Loutsis Dam King County | 22 | 1970 | Low | Satisfactory |
| Loreene Lake Dam King County | 19 | 1963 | Low | Not Rated |
| Loon Lake Control Structure Stevens County | 8 | 1951 | Low | Fair |
| Longview Sewage Lagoon No 4 Cowlitz County | 12 | 1987 | Low | Not Rated |
| Longview Sewage Lagoon No 3 Cowlitz County | 10 | 1987 | Low | Not Rated |
| Longview Sewage Lagoon No 2 Cowlitz County | 11 | 1986 | Low | Not Rated |
| Longview Sewage Lagoon No 1 Cowlitz County | 9 | 1986 | Low | Not Rated |
| Long Lake East Dam Spokane County | 25 | 1960 | Low | Fair |
| Longeway Dam Ferry County | 11 | 1970 | Low | Not Rated |
| Long Bell Mill Pond Dam Lewis County | 18 | 1943 | Low | Not Rated |
| Loers Dam Island County | 9 | 1958 | Low | Not Rated |
| Little Twin Lakes Dam Mason County | 25 | 1966 | Low | Not Rated |
| Little Sweden Dam Stevens County | 7 | 1986 | Low | Not Rated |
| Little Falls Spillway Dam Lincoln County | 72 | 1910 | Low | Fair |
| Lindblad Brothers Dam Grant County | 14 | 1940 | Low | Fair |
| Limekiln Dam San Juan County | 19 | 1976 | Low | Not Rated |
| Lewis Dam Kitsap County | 15 | 1973 | Low | Not Rated |
| Lenice Dam Grant County | 10 | 1976 | Low | Not Rated |
| Lawson Lake Dam San Juan County | 17 | 1948 | Low | Fair |
| Lawrence Lake Dam Thurston County | 30 | 1918 | Low | Not Rated |
| Lake Minterwood Dam Pierce County | 14 | 1967 | Low | Not Rated |
| Lacamas & Round Lakes Lower Dam Clark County | 26 | 1936 | Low | Satisfactory |
| Kristofferson Lake Dam Island County | 7 | 1961 | Low | Not Rated |
| Koreis Dam Franklin County | 8 | 1982 | Low | Not Rated |
| Kohne Dam No 2 Douglas County | 7 | 1950 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.