Dams in San Juan County, Washington
37Total Dams
9High Hazard
0Significant
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Trout Lake Storage Dam | High | Fair | 37 | Recreation | 1929 |
| Buck Mountain Reservoir Dam No 2 | High | Fair | 32 | Water Supply | 1985 |
| Boyd Lower Reservoir Dam | High | Fair | 24 | Irrigation | 1960 |
| Cascade Lake Dam | High | Poor | 21 | Hydroelectric | 1915 |
| Buck Mountain Reservoir Dam No 3 | High | Fair | 20 | Water Supply | 1985 |
| Mountain Lake Dam | High | Fair | 17 | Recreation | 1905 |
| Buck Mountain Reservoir Dam No 1 | High | Fair | 17 | Water Supply | 1985 |
| Roche Harbor Lake Dam | High | Satisfactory | 15 | Water Supply | 2013 |
| Jays Pond Dam | High | Fair | 8 | Recreation | 1973 |
| Spencer Lake | Low | Satisfactory | 42 | Hydroelectric | 1983 |
| Ayer Reservoir Dam | Low | 32 | Recreation | 1964 | |
| Sundstrom Dam No 2 | Low | 28 | Irrigation | 1984 | |
| Goodrow Dam | Low | 27 | Recreation | 1964 | |
| Zylstra Dam No 2 | Low | 25 | Irrigation | 1963 | |
| Blazing Tree Ranch Pond 6 Dam | Low | 25 | Irrigation | 1977 | |
| Blazing Tree Ranch Pond 5 South Dam | Low | 25 | Irrigation | 1965 | |
| Blazing Tree Ranch Pond 5 North Dam | Low | 25 | Irrigation | 1965 | |
| Durhack Dam No 1 | Low | 23 | Recreation | 1968 | |
| Durhack Dam No 4 | Low | 21 | Recreation | 1968 | |
| Woods Reservoir Dam | Low | 20 | Irrigation | 1972 | |
| Thorald Dam | Low | 19 | Irrigation | 1988 | |
| Limekiln Dam | Low | 19 | Recreation | 1976 | |
| Durhack Dam No 3 | Low | 18 | Recreation | 1968 | |
| Lawson Lake Dam | Low | Fair | 17 | Irrigation | 1948 |
| Helsell Dam | Low | 16 | Recreation | 1999 | |
| Sundstrom Dam No 1 | Low | 16 | Irrigation | 1970 | |
| Utter Dam | Low | 16 | Recreation | 1971 | |
| Heidenreich Dam | Low | 16 | Recreation | 1972 | |
| Jefferts Dam | Low | 15 | Irrigation | 1988 | |
| Durhack Dam No 5 | Low | 15 | Recreation | 1972 | |
| Fowler Reservoir Dam | Low | 15 | Irrigation | 1960 | |
| Burton & Louthan Dam | Low | 14 | Fire Protection, Stock, Or Small Fish Pond | 1973 | |
| Erickson Dam No 2 | Low | 14 | Recreation | 1964 | |
| Martins Lake Dam | Low | 13 | Recreation | 1962 | |
| Erickson Dam No 1 | Low | 13 | Recreation | 1964 | |
| Durhack Dam No 2 | Low | 10 | Recreation | 1968 | |
| Sportsman Lake Dam | Low | 7 | Irrigation | 1960 |