42Total Dams
21High Hazard
5Significant
Dam Safety in Snohomish County, Washington
Snohomish County has 42 dams tracked in the National Inventory of Dams. Of these, 21 are classified as high hazard — meaning failure would probably cause loss of human life. Another 5 carry a significant hazard classification. Currently, 6 dams have a condition assessment of poor or unsatisfactory.
The average dam in Snohomish County is 50 years old. The most common purpose is recreation. The tallest dam is Culmback at 262 ft.
Explore more: Oldest dams in Washington · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Culmback | High | Satisfactory | 262 | Hydroelectric | 1983 |
| Chaplain Lake South Dam | High | Satisfactory | 75 | Water Supply | 1930 |
| Boeing Flood Control Dam | High | Satisfactory | 48 | Flood Risk Reduction | 1967 |
| Chaplain Lake North Dam | High | Satisfactory | 35 | Water Supply | 1940 |
| Cedar Way Stormwater Detention Dam | High | Fair | 31 | Flood Risk Reduction | 1985 |
| Hilltop Waterski Pond | High | Fair | 30 | Recreation | 1995 |
| Everett Reservoir No 4 | High | Satisfactory | 24 | Water Supply | 1952 |
| Kayak Lake Dam | High | Poor | 24 | Recreation | 1965 |
| Lunds Gulch Creek Regional Stormwater Detention Pond | High | Fair | 24 | Flood Risk Reduction | 1992 |
| Everett Reservoir No 3 | High | Satisfactory | 22 | Water Supply | 1923 |
| Trophy Ponds Dam | High | Fair | 16 | Recreation | 1984 |
| Eaglemont Storm Pond | High | Poor | 14 | Flood Risk Reduction | 2014 |
| Rainbow Springs Dam | High | Poor | 14 | Recreation | 1969 |
| Silver Firs Detention Pond No 3 | High | Satisfactory | 14 | Flood Risk Reduction | 2000 |
| Mountain View East Storm Ponds | High | Not assessed | 11 | Flood Risk Reduction | 2021 |
| N Marysville Regional Stormwater Pond | High | Satisfactory | 11 | Flood Risk Reduction | 2004 |
| Chase Lake Stormwater Detention Dam | High | Not assessed | 10 | Flood Risk Reduction | 1990 |
| Nielsen Dam C | High | Poor | 9 | Recreation | 1973 |
| Nielsen Dam B | High | Poor | 9 | Recreation | 1973 |
| Crystal Lake Dam | High | Fair | 7 | Recreation | 1931 |
| N Marysville Regional Stormwater Pond No. 2 | High | Satisfactory | 7 | Flood Risk Reduction | 2015 |
| 60th Street Stormwater Detention Dam | Significant | Satisfactory | 104 | Flood Risk Reduction | 1988 |
| Seaway Center Stormwater Detention Dam | Significant | Satisfactory | 39 | Flood Risk Reduction | 1989 |
| Pigeon Creek No 1 Stormwater Detention D | Significant | Fair | 22 | Flood Risk Reduction | 1990 |
| Bueler Dairy Waste Storage Pond | Significant | Fair | 15 | Other | 2000 |
| Barlond Dairy Lagoon | Significant | Fair | 11 | Other | 1990 |
| Everett Clearwell Pond Dam | Low | Not assessed | 31 | Other | 1985 |
| Echo Falls Golf Course Reservoir No 2 | Low | Not assessed | 30 | Irrigation | 2000 |
| Rio Mount Dam | Low | Not assessed | 22 | Recreation | 1979 |
| Everett Washwater Storage Pond Dam | Low | Not assessed | 20 | Other | 1985 |
| Firnstahl Dam | Low | Poor | 19 | Irrigation | 1965 |
| Wsr Dairy Waste Lagoon | Low | Not assessed | 17 | Other | 1998 |
| Snohomish Wastewater Treatment Lagoon Sy | Low | Not assessed | 17 | Other | 1995 |
| French Slough Agricultural Waste Storage | Low | Not assessed | 16 | Other | 1997 |
| Nielsen Dam a | Low | Not assessed | 15 | Recreation | 1950 |
| Snohomish Sewage Lagoon | Low | Not assessed | 11 | Other | 1958 |
| Marysville Sewage Lagoon | Low | Not assessed | 11 | Other | 1959 |
| Gardner Dam | Low | Not assessed | 11 | Recreation | 1961 |
| Shoecraft Lake Outlet | Low | Not assessed | 10 | Recreation | 1952 |
| Dagger Lake Dam | Low | Not assessed | 10 | Recreation | 1912 |
| Three Rivers Mill Pond Dam | Low | Not assessed | 10 | Fire Protection, Stock, Or Small Fish Pond | 1946 |
| Stanwood Wastewater Pond | Low | Not assessed | 8 | Other | 1980 |