27Total Dams
11High Hazard
5Significant
Dam Safety in Pend Oreille County, Washington
Pend Oreille County has 27 dams tracked in the National Inventory of Dams. Of these, 11 are classified as high hazard — meaning failure would probably cause loss of human life. Another 5 carry a significant hazard classification. Currently, 2 dams have a condition assessment of poor or unsatisfactory.
The average dam in Pend Oreille County is 57 years old. The most common purpose is recreation. The tallest dam is Boundary at 360 ft.
Explore more: Oldest dams in Washington · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Boundary | High | Fair | 360 | Hydroelectric | 1967 |
| Power Lake Dam | High | Fair | 60 | Hydroelectric | 1922 |
| Sullivan Lake | High | Fair | 34 | Hydroelectric | 1923 |
| Calispell Creek Dike and Pump Plant | High | Poor | 28 | Hydroelectric | |
| Locke Dam | High | Satisfactory | 25 | Flood Risk Reduction | 1973 |
| Diamond Lake Aeration Lagoon No 3 | High | Satisfactory | 17 | Other | 1987 |
| Diamond Lake Aeration Lagoon No 2 | High | Satisfactory | 16 | Other | 1987 |
| Sacheen Lake Wwtp Lagoons | High | Fair | 15 | Other | 2016 |
| Diamond Lake Sewage Lagoon No 1 | High | Satisfactory | 12 | Other | 1988 |
| Marshall Lake Dam | High | Fair | 10 | Irrigation | 1912 |
| Mountain Meadows Lake Dam | High | Poor | 10 | Recreation | 1959 |
| Pend Oreille Mine Ne Tailings Dam | Significant | Satisfactory | 72 | Tailings | 2003 |
| Pend Oreille Mine Nw Tailings Dam | Significant | Satisfactory | 67 | Tailings | 2003 |
| D1 Big Meadow Lake Dam | Significant | Not assessed | 15 | Fish and Wildlife Pond | 1975 |
| Metaline Falls Wastewater Lagoon No 3 | Significant | Fair | 11 | Other | 1963 |
| Cusick Polishing Lagoon | Significant | Fair | 10 | Other | 1978 |
| Ione Mill Pond | Low | Not assessed | 35 | Recreation | 1914 |
| Ponderay Newsprint Mill Settling Lagoon | Low | Not assessed | 24 | Other | 1989 |
| Conger Lake Dam | Low | Not assessed | 22 | Recreation | 1926 |
| Homestead Lake Dam | Low | Not assessed | 22 | Recreation | 1971 |
| Duncan Dam No 2 | Low | Not assessed | 18 | Irrigation | 1966 |
| Vaagen Mitigation Control Structure | Low | Not assessed | 18 | Flood Risk Reduction | 1990 |
| Yergens & Anselmo Dam No 1 | Low | Not assessed | 15 | Recreation | 1970 |
| Kettwig Wildlife Dam | Low | Not assessed | 13 | Fish and Wildlife Pond | 1979 |
| Tacoma Sportsman Pond | Low | Not assessed | 10 | Recreation | 1954 |
| Flying Goose Ranch Wetland Dam No 1 | Low | Not assessed | 10 | Fish and Wildlife Pond | 1995 |
| Mallard Marsh Dam | Low | Not assessed | 8 | Recreation | 1960 |