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 312
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Moran Slough Dike Grant County | 13 | 1964 | Low | Satisfactory |
| Mill Pond Dam Klickitat Co Klickitat County | 18 | 1951 | Low | Not Rated |
| Miller Reservoir Dam Stevens County | 14 | 1959 | Low | Not Rated |
| Milk Pond Dam Kittitas County | 12 | 1980 | Low | Not Rated |
| Middle Pine Lake Dam Spokane County | 11 | 1938 | Low | Poor |
| Meyers Falls Stevens County | 26 | 1961 | Low | Satisfactory |
| Merry Dam Grant County | 10 | 1976 | Low | Not Rated |
| Melbourne Lake Dam Mason County | 9 | 1957 | Low | Not Rated |
| Mckay Dam Douglas County | 15 | 1961 | Low | Not Rated |
| Mcdowell Lake Dam Stevens County | 16 | 1973 | Low | Not Rated |
| Mcdonald Dam Grant County | 12 | 1924 | Low | Not Rated |
| Maytown Ski Pond Dam Thurston County | 9 | 1987 | Low | Not Rated |
| Mayfield Plunge Pool Barrier Lewis County | 14 | 1963 | Low | Satisfactory |
| Marysville Sewage Lagoon Snohomish County | 11 | 1959 | Low | Not Rated |
| Martins Lake Dam San Juan County | 13 | 1962 | Low | Not Rated |
| Martin Marietta Sludge Pond Klickitat County | 28 | 1981 | Low | Not Rated |
| Martin Dam Spokane County | 16 | 1972 | Low | Not Rated |
| Mallard Marsh Dam Pend Oreille County | 8 | 1960 | Low | Not Rated |
| Malar Dam Clark County | 40 | 1955 | Low | Not Rated |
| Macs Pond Dam Kitsap County | 39 | 1895 | Low | Not Rated |
| Lyon Lake Dam Grant County | 13 | 1971 | Low | Not Rated |
| Ludvick Lake Dam Kitsap County | 17 | 1950 | Low | Not Rated |
| Lower Turnbull Dam Spokane County | 8 | 1960 | Low | Fair |
| Lower Rimrock Dam Douglas County | 67 | 1972 | Low | Not Rated |
| Lower Pine Lake Dam Spokane County | 18 | 1940 | Low | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.