Dams in Grant County, Washington
44Total Dams
13High Hazard
6Significant
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| O'sullivan Dam | High | Not Available | 200 | Flood Risk Reduction | 1949 |
| Priest Rapids | High | Fair | 187 | Hydroelectric | 1961 |
| North Dam | High | Not Available | 145 | Flood Risk Reduction | 1951 |
| Pinto Dam | High | Not Available | 130 | Flood Risk Reduction | 1948 |
| Dry Falls Dam | High | Not Available | 123 | Flood Risk Reduction | 1949 |
| Chiawana Frenchman Hills Dam | High | Fair | 24 | Irrigation | 1995 |
| Ob-3 Warden Digester Lagoon | High | Satisfactory | 21 | Other | 2018 |
| Koehn Ranch Reservoir | High | Satisfactory | 19 | Irrigation | 2009 |
| Chiawana Rd O Sw Pond | High | 16 | Irrigation | 2019 | |
| Lawrence Orchards Dam | High | Fair | 13 | Irrigation | 1995 |
| Partridge Ranch Dam | High | Satisfactory | 12 | Irrigation | 2010 |
| Evans Desert Aire Pond | High | Satisfactory | 9 | Irrigation | 1990 |
| Coulee City Wastewater Lagoon | High | Satisfactory | 7 | Other | 1997 |
| Quincy Sludge Storage Lagoon System Lagoons 1 2 And 3 | Significant | Fair | 15 | Other | 1986 |
| Coulee City Wastewater Lagoon Cell 4 | Significant | Satisfactory | 15 | Other | 2008 |
| Quincy Aerated Lagoon No 2 | Significant | 12 | Other | 1987 | |
| Quincy Aerated Lagoon No 1 | Significant | 12 | Other | 1987 | |
| Quincy Brine Evaporation Ponds | Significant | Fair | 11 | Other | 1989 |
| Ingredion Process Water Lagoon | Significant | Satisfactory | 9 | Other | 2000 |
| Soda Lake Dike | Low | Not Available | 59 | Irrigation | 1952 |
| Nestle Potato Effluent Lagoon | Low | 32 | Other | 1994 | |
| Port Of Moses Lake Lagoon | Low | 30 | Other | 1999 | |
| Columbia Marsh Unit #1 Dam | Low | Poor | 25 | Fish and Wildlife Pond | 1958 |
| Simplot Lrar Lagoon | Low | 24 | Other | 2006 | |
| Rec Silicon Wastewater Pond | Low | Fair | 23 | Other | 2009 |
| Moses Lake South Dam | Low | Not Available | 20 | Irrigation | 1961 |
| Pacific Nw Sugar Co Condensation Pond | Low | 19 | Other | 1998 | |
| Moses Lake North Dam | Low | 19 | Irrigation | 1930 | |
| Carnation Waste Pond No 7 | Low | 16 | Other | 1979 | |
| Pacific Nw Sugar Co Sedimentation Pond | Low | 15 | Other | 1998 | |
| Smith Brothers Dairy Storage Lagoon | Low | 15 | Other | 2001 | |
| Columbia Marsh Unit #2 Dam | Low | Fair | 15 | Fish and Wildlife Pond | 1957 |
| Lindblad Brothers Dam | Low | Fair | 14 | Flood Risk Reduction | 1940 |
| Higginbotham Reservoir Dam | Low | 13 | Irrigation | 1947 | |
| Lyon Lake Dam | Low | 13 | Recreation | 1971 | |
| Moran Slough Dike | Low | Satisfactory | 13 | Hydroelectric | 1964 |
| Columbia Marsh Unit #1 Pond No. 3 Dam | Low | Poor | 13 | Fish and Wildlife Pond | 1958 |
| Mcdonald Dam | Low | 12 | Flood Risk Reduction | 1924 | |
| Alkali Lake | Low | 12 | Recreation | 1950 | |
| Rearing Pond Dike | Low | 12 | Fish and Wildlife Pond | 1964 | |
| Crab Creek Flood Flat Water Control Structure | Low | 11 | Fish and Wildlife Pond | 2024 | |
| Merry Dam | Low | 10 | Recreation | 1976 | |
| Lenice Dam | Low | 10 | Recreation | 1976 | |
| George City Wastewater Treatment Lago | Low | 9 | Other | 1996 |