46Total Dams
25High Hazard
12Significant
Dam Safety in Washington County, Utah
Washington County has 46 dams tracked in the National Inventory of Dams. Of these, 25 are classified as high hazard — meaning failure would probably cause loss of human life. Another 12 carry a significant hazard classification. Currently, 2 dams have a condition assessment of poor or unsatisfactory.
The average dam in Washington County is 58 years old. The most common purpose is flood risk reduction. The tallest dam is Quail Creek at 209 ft.
Explore more: Oldest dams in Utah · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Quail Creek | High | Satisfactory | 209 | Irrigation | 1984 |
| Ash Creek | High | Fair | 138 | Irrigation | 1960 |
| Gunlock | High | Satisfactory | 117 | Irrigation | 1970 |
| Sand Hollow North Dam | High | Satisfactory | 98 | Water Supply | 2002 |
| Enterprise (upper) | High | Satisfactory | 91 | Irrigation | 1912 |
| South Creek - Washington County | High | Satisfactory | 91 | Irrigation | 1988 |
| Quail Creek South Dam | High | Satisfactory | 80 | Water Supply | 1990 |
| St. George City - City Creek D.b. | High | Satisfactory | 76 | Flood Risk Reduction | 1989 |
| Baker | High | Fair | 68 | Irrigation | 1950 |
| Warner Draw | High | Fair | 67 | Flood Risk Reduction | 1975 |
| Kolob Creek | High | Fair | 61 | Irrigation | 1956 |
| Frog Hollow | High | Poor | 58 | Flood Risk Reduction | 1978 |
| Enterprise (lower) | High | Fair | 56 | Irrigation | 1925 |
| Sand Hollow West Dam | High | Satisfactory | 51 | Water Supply | 2002 |
| Ivins Bench | High | Satisfactory | 47 | Irrigation | 1943 |
| Stucki Debris | High | Satisfactory | 31 | Flood Risk Reduction | 1974 |
| Tuacahn Wash Lower Detention Basin | High | Satisfactory | 29 | Flood Risk Reduction | 1919 |
| Gypsum Wash | High | Fair | 26 | 1975 | |
| Ivins Red Mountain - 1 | High | Satisfactory | 15 | Flood Risk Reduction | 1977 |
| Ivins Red Mountain - 4 | High | Satisfactory | 13 | Flood Risk Reduction | 1977 |
| Ivins Red Mountain - 3 | High | Satisfactory | 13 | Flood Risk Reduction | 1977 |
| Ivins Red Mountain - 5 | High | Satisfactory | 12 | Flood Risk Reduction | 1977 |
| Ivins Red Mountain - 2 | High | Satisfactory | 12 | Flood Risk Reduction | 1977 |
| St. George City - Navajo D.b. | High | Satisfactory | 12 | Flood Risk Reduction | 2002 |
| Ivins Red Mountain - 6 | High | Satisfactory | 11 | Flood Risk Reduction | 1977 |
| Town of Springdale 88r161 | Significant | Not assessed | 100 | Other | |
| Grass Valley | Significant | Not assessed | 75 | Flood Risk Reduction | 1917 |
| Pine Valley Reservoir | Significant | Poor | 45 | Recreation | 1934 |
| Blue Springs | Significant | Not assessed | 31 | Recreation | 1957 |
| Hildale Carling Street Db | Significant | Not assessed | 25 | Flood Risk Reduction | |
| Tuacahn Wash Upper Detention Basin | Significant | Satisfactory | 20 | Flood Risk Reduction | 2013 |
| Frehner, Garth E. | Significant | Not assessed | 19 | Irrigation | |
| Summit Development, Pond N10 | Significant | Not assessed | 15 | Flood Risk Reduction | |
| Christensen, Elliott F. (lds Church) | Significant | Not assessed | 15 | Recreation | |
| Frehner, Garth E. | Significant | Not assessed | 14 | Irrigation | |
| Summit Development, Pond N8 | Significant | Not assessed | 14 | Flood Risk Reduction | |
| Summit Development, Pond N6 | Significant | Not assessed | 12 | Irrigation | |
| Quail Creek Diversion | Low | Not assessed | 73 | Irrigation | 1984 |
| Sitla - Sienna Hills | Low | Not assessed | 26 | Flood Risk Reduction | |
| Frehner, Garth E. Family Trust | Low | Not assessed | 26 | Irrigation | |
| Bowler, John M. , Et Al 84r25 | Low | Not assessed | 25 | Other | |
| Pacificorp - Sand Cove (lower) | Low | Not assessed | 20 | Hydroelectric | 1928 |
| Stirling, David H. 97-81-07md | Low | Not assessed | 20 | Other | |
| St. George Replacement Aiport/db 2 | Low | Not assessed | 17 | Flood Risk Reduction | 2008 |
| Pub Greenspring L.c. Pond a | Low | Not assessed | 13 | Flood Risk Reduction | |
| Pacificorp - Sand Cove (upper) | Low | Not assessed | 12 | Hydroelectric | 1928 |