Dams in Union County, Iowa
128Total Dams
2High Hazard
5Significant
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Twelve Mile Creek Watershed Site M-1 | High | Satisfactory | 66 | Flood Risk Reduction | 1983 |
| Creston Flood Prevention Dam | High | Fair | 27 | Flood Risk Reduction | 1975 |
| Three Mile Reservoir Dam | Significant | Satisfactory | 63 | Flood Risk Reduction | 1995 |
| Afton Reservoir Dam | Significant | Satisfactory | 51 | Water Supply | 1936 |
| Green Valley Lake Dam | Significant | Fair | 41 | Recreation | 1953 |
| Twelve Mile Creek Watershed Site D-62-1 | Significant | Satisfactory | 35 | Flood Risk Reduction | 1985 |
| Mc Kinley Lake Dam | Significant | Satisfactory | 19 | Recreation | 1920 |
| Beattie Dam | Low | Not Rated | 43 | Fire Protection, Stock, Or Small Fish Pond | 1966 |
| Iowa Select Farms Dam | Low | Not Rated | 40 | Water Supply | 1997 |
| Union County Roadgrade Dam 29-73-29 | Low | Not Rated | 39 | Other | 1993 |
| Twelvemile Creek Watershed Site D-41-a2 | Low | Not Rated | 38 | Fire Protection, Stock, Or Small Fish Pond | 1999 |
| Twelve Mile Creek Watershed Site D-35 | Low | Not Rated | 38 | Fire Protection, Stock, Or Small Fish Pond | 1988 |
| Three Mile Creek Watershed Site 49 | Low | Not Rated | 37 | Fire Protection, Stock, Or Small Fish Pond | 1976 |
| Iowa Noname75 | Low | Not Rated | 36 | Fire Protection, Stock, Or Small Fish Pond | 1977 |
| Twelve Mile Creek Watershed Site 18 | Low | Not Rated | 36 | Fire Protection, Stock, Or Small Fish Pond | 1986 |
| Twelve Mile Creek Watershed Site D-44-1 | Low | Not Rated | 36 | Flood Risk Reduction | 2008 |
| Three Mile Creek Watershed Site 33 | Low | Not Rated | 36 | Fire Protection, Stock, Or Small Fish Pond | 1976 |
| Twelve Mile Creek Watershed Site 62-5 | Low | Not Rated | 36 | Grade Stabilization | 2003 |
| Twelve Mile Creek Watershed Site D-41-a-5 | Low | Not Rated | 36 | Flood Risk Reduction | 2006 |
| Twelvemile Watershed Site D-60 | Low | Not Rated | 35 | Fire Protection, Stock, Or Small Fish Pond | 1999 |
| Twelve Mile Creek Watershed Site 30 | Low | Not Rated | 35 | Fire Protection, Stock, Or Small Fish Pond | 1986 |
| Three Mile Creek Watershed Site 42 | Low | Not Rated | 35 | Other | 1970 |
| Three Mile Creek Watershed Site 36 | Low | Not Rated | 35 | Fire Protection, Stock, Or Small Fish Pond | 1976 |
| Three Mile Creek Watershed Site 52-1 | Low | Not Rated | 35 | Fire Protection, Stock, Or Small Fish Pond | 1976 |
| Weis Dam | Low | Not Rated | 34 | Fire Protection, Stock, Or Small Fish Pond | 1971 |
| Deer Ridge Dam | Low | Not Rated | 34 | Recreation | 1983 |
| David Downey Dam | Low | Not Rated | 34 | Grade Stabilization | 2013 |
| Twelve Mile Creek Watershed Site D-44 | Low | Not Rated | 34 | Flood Risk Reduction | 2003 |
| Cheers Dam | Low | Not Rated | 33 | Grade Stabilization | 2005 |
| Twelve Mile Creek Watershed Site 23 | Low | Not Rated | 33 | Fire Protection, Stock, Or Small Fish Pond | 1988 |
| Three Mile Creek Watershed Site 29 | Low | Not Rated | 33 | Fire Protection, Stock, Or Small Fish Pond | 1970 |
| Three Mile Creek Watershed Site 3 | Low | Not Rated | 33 | Fire Protection, Stock, Or Small Fish Pond | 1970 |
| Twelve Mile Creek Watershed Site 40-1 | Low | Not Rated | 33 | Fire Protection, Stock, Or Small Fish Pond | 1993 |
| Twelve Mile Creek Watershed Site D-41-a-3 | Low | Not Rated | 33 | Flood Risk Reduction | 2006 |
| Three Mile Creek Watershed Site 50-1 | Low | Not Rated | 33 | Fire Protection, Stock, Or Small Fish Pond | 1976 |
| Abell Dam | Low | Not Rated | 32 | Fire Protection, Stock, Or Small Fish Pond | 1987 |
| Matt Brown Dam | Low | 32 | Grade Stabilization | 2019 | |
| Beattle Dam | Low | Not Rated | 32 | Fire Protection, Stock, Or Small Fish Pond | 1969 |
| Ripperger Dam | Low | Not Rated | 32 | Fire Protection, Stock, Or Small Fish Pond | 1983 |
| Carl Kirkland Dam | Low | Not Rated | 32 | Grade Stabilization | 2014 |
| Bower Off-road Dam | Low | Not Rated | 32 | Fire Protection, Stock, Or Small Fish Pond | 1990 |
| Twelve Mile Creek Watershed Site 48 | Low | Not Rated | 32 | Fire Protection, Stock, Or Small Fish Pond | 1985 |
| Three Mile Creek Watershed Site 58 | Low | Not Rated | 32 | Fire Protection, Stock, Or Small Fish Pond | 1968 |
| Twelve Mile Creek Watershed Site D-41a4 | Low | Not Rated | 32 | Fire Protection, Stock, Or Small Fish Pond | 1993 |
| Three Mile Creek Watershed Site 43-1 | Low | Not Rated | 32 | Fire Protection, Stock, Or Small Fish Pond | 1976 |
| Stickles Dam | Low | Not Rated | 31 | Fire Protection, Stock, Or Small Fish Pond | 1977 |
| Kuhl Dam | Low | Not Rated | 31 | Fire Protection, Stock, Or Small Fish Pond | 1997 |
| Cramer Farms Dam | Low | Not Rated | 31 | Fire Protection, Stock, Or Small Fish Pond | 1976 |
| Twelve Mile Creek Watershed Site 36 | Low | Not Rated | 31 | Grade Stabilization | 2003 |
| Twelve Mile Creek Watershed Site 27 | Low | Not Rated | 31 | Fire Protection, Stock, Or Small Fish Pond | 1986 |
| Three Mile Creek Watershed Site 9 | Low | Not Rated | 31 | Other | 1970 |
| Three Mile Creek Watershed Site 45-1 | Low | Not Rated | 31 | Other | 1970 |
| Three Mile Creek Watershed Site 14-g | Low | Not Rated | 31 | Fire Protection, Stock, Or Small Fish Pond | 1970 |
| Three Mile Creek Watershed Site 45-2 | Low | Not Rated | 31 | Fire Protection, Stock, Or Small Fish Pond | 1970 |
| Three Mile Creek Watershed Site 50-2 | Low | Not Rated | 31 | Flood Risk Reduction | 1980 |
| Mc Donald Dam | Low | Not Rated | 30 | Fire Protection, Stock, Or Small Fish Pond | 2001 |
| Brown Dam | Low | Not Rated | 30 | Fire Protection, Stock, Or Small Fish Pond | 1978 |
| Matthew Brown | Low | 30 | Grade Stabilization | 2018 | |
| Thayer Lake Dam | Low | Not Rated | 30 | Recreation | 1930 |
| Twelve Mile Creek Watershed Site 73 | Low | Not Rated | 30 | Fire Protection, Stock, Or Small Fish Pond | 1979 |
| Twelve Mile Creek Watershed Site 35-2 | Low | Not Rated | 30 | Fire Protection, Stock, Or Small Fish Pond | 1986 |
| Twelve Mile Creek Watershed Site 62-4 | Low | Not Rated | 30 | Fire Protection, Stock, Or Small Fish Pond | 1979 |
| Mc Guire Dam | Low | Not Rated | 29 | Fire Protection, Stock, Or Small Fish Pond | 2003 |
| Crittenden Dam | Low | Not Rated | 29 | Fire Protection, Stock, Or Small Fish Pond | 1977 |
| Erickson Dam | Low | Not Rated | 29 | Grade Stabilization | 2006 |
| Claiser Dam | Low | Not Rated | 29 | Fire Protection, Stock, Or Small Fish Pond | 1974 |
| Hayes Cattle Company Dam | Low | 29 | Grade Stabilization | 2017 | |
| East Fork Grand River Watershed Site A-32 | Low | Not Rated | 29 | Flood Risk Reduction | 2005 |
| Cheers Dam | Low | Not Rated | 28 | Fire Protection, Stock, Or Small Fish Pond | 1994 |
| Henco Dam | Low | Not Rated | 28 | Fire Protection, Stock, Or Small Fish Pond | 1982 |
| Brown Dam | Low | Not Rated | 28 | Fire Protection, Stock, Or Small Fish Pond | 1966 |
| Granfield/westrum Dam | Low | Not Rated | 28 | Fire Protection, Stock, Or Small Fish Pond | 1977 |
| Smith (bill) Dam | Low | Not Rated | 28 | Grade Stabilization | 2013 |
| Twelve Mile Creek Watershed Site 58 | Low | Not Rated | 28 | Fire Protection, Stock, Or Small Fish Pond | 1985 |
| Twelve Mile Creek Watershed Site 46 | Low | Not Rated | 28 | Fire Protection, Stock, Or Small Fish Pond | 1993 |
| Twelve Mile Creek Watershed Site 67 | Low | Not Rated | 28 | Fire Protection, Stock, Or Small Fish Pond | 1979 |
| Twelve Mile Creek Watershed Site 68-1 | Low | Not Rated | 28 | Fire Protection, Stock, Or Small Fish Pond | 1979 |
| Three Mile Creek Watershed Site U-4 | Low | Not Rated | 28 | Fire Protection, Stock, Or Small Fish Pond | 1980 |
| Three Mile Creek Watershed Site U-5-b | Low | Not Rated | 28 | Fire Protection, Stock, Or Small Fish Pond | 1980 |
| Ripperger Dam | Low | Not Rated | 27 | Fire Protection, Stock, Or Small Fish Pond | 1986 |
| Kelly Dam | Low | Not Rated | 27 | Fire Protection, Stock, Or Small Fish Pond | 2002 |
| Wittstock Dam | Low | Not Rated | 27 | Fire Protection, Stock, Or Small Fish Pond | 1977 |
| Ridinger Dam | Low | Not Rated | 27 | Fire Protection, Stock, Or Small Fish Pond | 1964 |
| Miller-main Dam | Low | Not Rated | 27 | Fire Protection, Stock, Or Small Fish Pond | 1990 |
| Double Time Farms Dam | Low | Not Rated | 27 | Fire Protection, Stock, Or Small Fish Pond | 1992 |
| East Fork Grand River Watershed Site A-34 | Low | Not Rated | 27 | Flood Risk Reduction | 2008 |
| Three Mile Creek Watershed Site U-7 | Low | Not Rated | 27 | Fire Protection, Stock, Or Small Fish Pond | 1980 |
| Twelve Mile Creek Watershed Site 72-1 | Low | Not Rated | 27 | Fire Protection, Stock, Or Small Fish Pond | 1979 |
| Three Mile Creek Watershed Site 14-g-1 | Low | Not Rated | 27 | Fire Protection, Stock, Or Small Fish Pond | 1976 |
| Gennaro Dam | Low | Not Rated | 26 | Grade Stabilization | 2006 |
| Summit Lake Dam | Low | Satisfactory | 26 | Recreation | 1935 |
| Iowa Noname53 | Low | Not Rated | 26 | Fire Protection, Stock, Or Small Fish Pond | 1972 |
| Three Mile Lake Sediment Dam | Low | Not Rated | 26 | Other | 1999 |
| East Fork Grand River Watershed Site A-54 | Low | Not Rated | 26 | Flood Risk Reduction | 2008 |
| Three Mile Creek Watershed Site U-2 | Low | Not Rated | 26 | Fire Protection, Stock, Or Small Fish Pond | 1980 |
| Downing Dam | Low | Not Rated | 25 | Fire Protection, Stock, Or Small Fish Pond | 1994 |
| Kirk Joy Dam | Low | Not Rated | 25 | Fire Protection, Stock, Or Small Fish Pond | 1987 |
| Talmage Hill Dam | Low | Not Rated | 25 | Recreation | 1985 |
| Houghton Dam | Low | Not Rated | 25 | Fire Protection, Stock, Or Small Fish Pond | 1967 |
| Milligan Dam | Low | Not Rated | 25 | Fire Protection, Stock, Or Small Fish Pond | 1973 |
| Liken Family Farm Dam | Low | Not Rated | 25 | Fire Protection, Stock, Or Small Fish Pond | 1986 |
| Three Mile Creek Watershed Site 14-m | Low | Not Rated | 25 | Other | 1976 |
| Twelve Mile Creek Watershed Site 68-2 | Low | Not Rated | 25 | Fire Protection, Stock, Or Small Fish Pond | 1979 |
| East Fork Grand River Watershed Site A-35 | Low | Not Rated | 25 | Flood Risk Reduction | 2011 |
| Wasteney Dam | Low | Not Rated | 24 | Fire Protection, Stock, Or Small Fish Pond | 1977 |
| Hubbard Dam | Low | Not Rated | 24 | Recreation | 1971 |
| East Fork Grand River Watershed Site A-40 | Low | Not Rated | 24 | Flood Risk Reduction | 2005 |
| East Fork Grand River Watershed Site A-37 | Low | Not Rated | 24 | Flood Risk Reduction | 2005 |
| Three Mile Creek Watershed Site U-5-a | Low | Not Rated | 24 | Fire Protection, Stock, Or Small Fish Pond | 1980 |
| Twelve Mile Creek Watershed Site 71 | Low | Not Rated | 23 | Fire Protection, Stock, Or Small Fish Pond | 1993 |
| Twelve Mile Creek Watershed Site 72-2 | Low | Not Rated | 23 | Fire Protection, Stock, Or Small Fish Pond | 1979 |
| East Fork Grand River Watershed Site A-53 | Low | Not Rated | 23 | Flood Risk Reduction | 2008 |
| Three Mile Creek Watershed Site 14-p | Low | Not Rated | 23 | Fire Protection, Stock, Or Small Fish Pond | 1976 |
| Three Mile Creek Watershed Site U-3 | Low | Not Rated | 23 | Fire Protection, Stock, Or Small Fish Pond | 1980 |
| Dory Dam | Low | Not Rated | 22 | Fire Protection, Stock, Or Small Fish Pond | 1985 |
| Hiatt Dam | Low | Not Rated | 22 | Fire Protection, Stock, Or Small Fish Pond | 1968 |
| East Fork Grand River Watershed Site A-36 | Low | Not Rated | 22 | Grade Stabilization | 2001 |
| East Fork Grand River Watershed Site A-30 | Low | Not Rated | 22 | Flood Risk Reduction | 2005 |
| Twelve Mile Creek Watershed Site 77 | Low | Not Rated | 22 | Fire Protection, Stock, Or Small Fish Pond | 1979 |
| East Fork Grand River Watershed Site A-55 | Low | Not Rated | 22 | Flood Risk Reduction | 2008 |
| Travis Dam | Low | Not Rated | 21 | Fire Protection, Stock, Or Small Fish Pond | 1967 |
| Sharp Dam | Low | Not Rated | 21 | Fire Protection, Stock, Or Small Fish Pond | 1980 |
| Maxwell Dam | Low | Not Rated | 21 | Fire Protection, Stock, Or Small Fish Pond | 1983 |
| East Fork Grand River Watershed Site A-31 | Low | Not Rated | 21 | Flood Risk Reduction | 2005 |
| Crestmor Golf Club Dam | Low | Not Rated | 20 | Recreation | 1994 |
| Cheers Dam | Low | Not Rated | 18 | Fire Protection, Stock, Or Small Fish Pond | 1970 |
| Hawk Lake Dam | Low | Not Rated | 18 | Water Supply | 1967 |
| Van Hall Dam | Low | Not Rated | 8 | Other | 1995 |