Dams in Valley County, Idaho
41Total Dams
4High Hazard
24Significant
Dam Safety in Valley County, Idaho
Valley County has 41 dams tracked in the National Inventory of Dams. Of these, 4 are classified as high hazard — meaning failure would probably cause loss of human life. Another 24 carry a significant hazard classification. Currently, 2 dams have a condition assessment of poor or unsatisfactory.
The average dam in Valley County is 68 years old. The most common purpose is irrigation. The tallest dam is Deadwood Dam at 165 ft.
Explore more: Oldest dams in Idaho · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Deadwood Dam | High | Not Available | 165 | Hydroelectric | 1931 |
| Cascade Dam | High | Not Available | 110 | Hydroelectric | 1948 |
| J-ditch Effluent Lagoon | High | Fair | 60 | Other | 2001 |
| Little Payette Lake Main | High | Fair | 25 | Irrigation | 1926 |
| Jemima K | Significant | Fair | 71 | Irrigation | 1974 |
| Tom J | Significant | Fair | 57 | Irrigation | 1995 |
| Horsethief | Significant | Fair | 53 | Other | 1967 |
| Blackhawk Lake | Significant | Fair | 45 | Irrigation | 1968 |
| Hughes | Significant | Fair | 43 | Irrigation | 1957 |
| Corral Creek | Significant | Fair | 43 | Irrigation | 1952 |
| Herrick | Significant | Fair | 38 | Other | 1953 |
| Boulder Meadow | Significant | Poor | 35 | Irrigation | 1968 |
| Davis | Significant | Fair | 34 | Irrigation | 1942 |
| Jug Creek Upper | Significant | Fair | 32 | Irrigation | 1946 |
| Beal No 3 | Significant | Fair | 30 | Irrigation | 1974 |
| Jughandle Estates | Significant | Fair | 28 | Other | 1974 |
| Tom J Dike | Significant | Fair | 27 | Irrigation | 1995 |
| Hidden Lake | Significant | Fair | 26 | Fish and Wildlife Pond | 1970 |
| Granite Lake | Significant | Fair | 25 | Irrigation | 1949 |
| Jussila Bow | Significant | Fair | 23 | Irrigation | 1949 |
| Pitkin | Significant | Fair | 21 | Recreation | 1974 |
| Rio Vista | Significant | Fair | 20 | Recreation | 1971 |
| Warren Diversion | Significant | Fair | 19 | Irrigation | 1924 |
| Knox Meadow | Significant | Fair | 19 | Irrigation | 1941 |
| Boulder Lake | Significant | Fair | 15 | Irrigation | 1902 |
| Payette Lake Upper | Significant | Fair | 15 | Irrigation | 1953 |
| Payette Lake | Significant | Fair | 13 | Other | 1943 |
| Little Payette Lake Dike | Significant | Poor | 11 | Irrigation | 1926 |
| Smalley | Low | Fair | 35 | Irrigation | 1952 |
| Hollenbeak | Low | Fair | 29 | Other | 1972 |
| Yanke | Low | Fair | 29 | Fish and Wildlife Pond | 1988 |
| Koskella | Low | Fair | 24 | Irrigation | 1947 |
| Soulen Family Dam | Low | Fair | 22 | Other | 2009 |
| Poro | Low | Fair | 22 | Irrigation | 1947 |
| Brown | Low | Fair | 21 | Irrigation | 1979 |
| Eld | Low | Fair | 19 | Irrigation | 1976 |
| Louie Lake | Low | Fair | 18 | Irrigation | 1928 |
| Holbrook | Low | Satisfactory | 17 | Irrigation | 1955 |
| Shaw Twins Upper | Low | Fair | 17 | Irrigation | 1930 |
| Pine Lake | Low | Fair | 17 | Other | 1974 |
| Box Lake | Low | Fair | 13 | Irrigation | 1935 |