79Total Dams
1High Hazard
10Significant
Dam Safety in Mills County, Iowa
Mills County has 79 dams tracked in the National Inventory of Dams. Of these, 1 are classified as high hazard — meaning failure would probably cause loss of human life. Another 10 carry a significant hazard classification. Currently, 1 dam has a condition assessment of poor or unsatisfactory.
The average dam in Mills County is 51 years old. The most common purpose is fire protection, stock, or small fish pond. The tallest dam is Pony Creek Watershed Site 21 at 75 ft.
Explore more: Oldest dams in Iowa · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Pony Creek Watershed Site 21 | High | Satisfactory | 75 | Flood Risk Reduction | 1971 |
| Waubonsie Cr. Watershed Site 11-1 | Significant | Satisfactory | 71 | Flood Risk Reduction | 1977 |
| Waubonsie Cr. Watershed Site 3-8 | Significant | Satisfactory | 69 | Fire Protection, Stock, Or Small Fish Pond | 1989 |
| Pony Creek Watershed Site 10 | Significant | Satisfactory | 60 | Fire Protection, Stock, Or Small Fish Pond | 1966 |
| Waubonsie Cr. Watershed Site 23-3 | Significant | Satisfactory | 53 | Fire Protection, Stock, Or Small Fish Pond | 1987 |
| Pony Creek Watershed Site 30 | Significant | Satisfactory | 49 | Flood Risk Reduction | 1964 |
| Waubonsie Cr. Watershed Site 3-3 | Significant | Satisfactory | 49 | Flood Risk Reduction | 1993 |
| Waubonsie Cr. Watershed Site 3-7 | Significant | Satisfactory | 47 | Fire Protection, Stock, Or Small Fish Pond | 1989 |
| Lake Ohana Dam #1 | Significant | Poor | 46 | 2007 | |
| Waubonsie Cr. Watershed Site 3 | Significant | Satisfactory | 43 | Fire Protection, Stock, Or Small Fish Pond | 1994 |
| Waubonsie Cr. Watershed Site M-1 | Significant | Satisfactory | 42 | Other | 1978 |
| Waubonsie Cr. Watershed Site 3-11 | Low | Not assessed | 66 | Fire Protection, Stock, Or Small Fish Pond | 1989 |
| Pony Creek Watershed Site 23 | Low | Not assessed | 64 | Fire Protection, Stock, Or Small Fish Pond | 1964 |
| Pony Creek Watershed Site 8a | Low | Not assessed | 62 | Fire Protection, Stock, Or Small Fish Pond | 1966 |
| Pony Creek Watershed Site 17 | Low | Satisfactory | 62 | Fire Protection, Stock, Or Small Fish Pond | 1965 |
| Pony Creek Watershed Site 9 | Low | Not assessed | 60 | Fire Protection, Stock, Or Small Fish Pond | 1967 |
| Waubonsie Cr. Watershed Site 23-2 | Low | Not assessed | 54 | Fire Protection, Stock, Or Small Fish Pond | 1979 |
| Pony Creek Watershed Site 11 | Low | Not assessed | 53 | Fire Protection, Stock, Or Small Fish Pond | 1963 |
| Waubonsie Cr. Watershed Site 37-1 | Low | Not assessed | 53 | Fire Protection, Stock, Or Small Fish Pond | 1983 |
| Waubonsie Cr. Watershed Site 36-2 | Low | Not assessed | 53 | Fire Protection, Stock, Or Small Fish Pond | 1983 |
| Waubonsie Cr. Watershed Site 3-5 | Low | Not assessed | 51 | Fire Protection, Stock, Or Small Fish Pond | 1989 |
| Waubonsie Cr. Watershed Site 3-2 | Low | Not assessed | 51 | Fire Protection, Stock, Or Small Fish Pond | 1993 |
| Waubonsie Cr. Watershed Site 31-1 | Low | Not assessed | 50 | Fire Protection, Stock, Or Small Fish Pond | 1983 |
| Waubonsie Cr. Watershed Site 3-6 | Low | Not assessed | 50 | Fire Protection, Stock, Or Small Fish Pond | 1989 |
| Pony Creek Watershed Site 15 | Low | Not assessed | 48 | Fire Protection, Stock, Or Small Fish Pond | 1965 |
| Pony Creek Watershed Site 20 | Low | Not assessed | 48 | Fire Protection, Stock, Or Small Fish Pond | 1965 |
| Pony Creek Watershed Site 22 | Low | Not assessed | 48 | Fire Protection, Stock, Or Small Fish Pond | 1963 |
| Waubonsie Cr. Watershed Site 36-3 | Low | Not assessed | 47 | Fire Protection, Stock, Or Small Fish Pond | 1983 |
| Waubonsie Cr. Watershed Site 9-1 | Low | Not assessed | 47 | Other | 1976 |
| Pony Creek Watershed Site 34 | Low | Not assessed | 46 | Fire Protection, Stock, Or Small Fish Pond | 1963 |
| Mule Creek Watershed Sta 60+00 | Low | Not assessed | 46 | Fire Protection, Stock, Or Small Fish Pond | 1955 |
| Waubonsie Cr. Watershed Site 36-1 | Low | Not assessed | 45 | Fire Protection, Stock, Or Small Fish Pond | 1983 |
| Mule Creek Watershed Sta 89+00 | Low | Not assessed | 45 | Fire Protection, Stock, Or Small Fish Pond | 1956 |
| Mule Creek Watershed Sta 38+20 | Low | Not assessed | 45 | Fire Protection, Stock, Or Small Fish Pond | 1955 |
| Mule Creek Watershed Sta 75+32 | Low | Not assessed | 45 | Fire Protection, Stock, Or Small Fish Pond | 1956 |
| Waubonsie Cr. Watershed Site 23-1 | Low | Not assessed | 45 | Fire Protection, Stock, Or Small Fish Pond | 1979 |
| Mule Creek Watershed Sta 48+87 | Low | Not assessed | 44 | Fire Protection, Stock, Or Small Fish Pond | 1955 |
| Schoening Dam | Low | Not assessed | 42 | Fire Protection, Stock, Or Small Fish Pond | 1945 |
| Good/johnson Dam | Low | Not assessed | 42 | Fire Protection, Stock, Or Small Fish Pond | 1961 |
| Reinert Dam | Low | Not assessed | 41 | Fire Protection, Stock, Or Small Fish Pond | 1998 |
| Powers Dam | Low | Not assessed | 41 | Fire Protection, Stock, Or Small Fish Pond | 1960 |
| Paulson Dam | Low | Not assessed | 40 | Fire Protection, Stock, Or Small Fish Pond | 1977 |
| Waubonsie Cr. Watershed Site 39 | Low | Not assessed | 40 | Fire Protection, Stock, Or Small Fish Pond | 1983 |
| Pony Creek Watershed Site 24 | Low | Not assessed | 40 | Fire Protection, Stock, Or Small Fish Pond | 1964 |
| Pony Creek Watershed Site 31 | Low | Not assessed | 38 | Fire Protection, Stock, Or Small Fish Pond | 1963 |
| Dashner Dam | Low | Not assessed | 37 | Fire Protection, Stock, Or Small Fish Pond | 1959 |
| Mule Creek Watershed Site 7 | Low | Not assessed | 37 | Fire Protection, Stock, Or Small Fish Pond | 1954 |
| Pony Creek Watershed Site 26 | Low | Not assessed | 37 | Fire Protection, Stock, Or Small Fish Pond | 1963 |
| Waubonsie Cr. Watershed Site 39-1 | Low | Not assessed | 37 | Fire Protection, Stock, Or Small Fish Pond | 1983 |
| Mule Creek Watershed Sta 48+00 | Low | Not assessed | 37 | Fire Protection, Stock, Or Small Fish Pond | 1956 |
| Strotenbecker Dam | Low | Not assessed | 36 | Fire Protection, Stock, Or Small Fish Pond | 1960 |
| Hopp Dam (upper Site) | Low | Not assessed | 36 | Grade Stabilization | 2005 |
| Deitchler Dam | Low | Not assessed | 35 | Grade Stabilization | 2020 |
| Mc Grew Brothers Dam | Low | Not assessed | 35 | Fire Protection, Stock, Or Small Fish Pond | 2001 |
| Mule Creek Watershed Sta 56+03 | Low | Not assessed | 35 | Fire Protection, Stock, Or Small Fish Pond | 1956 |
| Mule Creek Watershed Sta 30+00 | Low | Not assessed | 35 | Fire Protection, Stock, Or Small Fish Pond | 1955 |
| Speck Dam | Low | Not assessed | 34 | Grade Stabilization | 2004 |
| Waubonsie Creek Watershed Site M-3 | Low | Not assessed | 34 | Grade Stabilization | 1999 |
| Mule Creek Watershed Sta 34+00 | Low | Not assessed | 34 | Fire Protection, Stock, Or Small Fish Pond | 1955 |
| Mule Creek Watershed Sta 97+60 | Low | Not assessed | 34 | Fire Protection, Stock, Or Small Fish Pond | 1955 |
| Bateman Dam | Low | Not assessed | 32 | Fire Protection, Stock, Or Small Fish Pond | 1945 |
| Mc Manigal Dam | Low | Not assessed | 32 | Fire Protection, Stock, Or Small Fish Pond | 1945 |
| Mule Creek Watershed 7837 | Low | Not assessed | 32 | Fire Protection, Stock, Or Small Fish Pond | 1954 |
| Waubonsie Creek Watershed Site M-4 | Low | Not assessed | 32 | Fire Protection, Stock, Or Small Fish Pond | 1998 |
| Mule Creek Watershed Sta 16+00 | Low | Not assessed | 32 | Fire Protection, Stock, Or Small Fish Pond | 1956 |
| Johnson Dam | Low | Not assessed | 30 | Fire Protection, Stock, Or Small Fish Pond | 2006 |
| Hopp Dam (lower Site) | Low | Not assessed | 30 | Grade Stabilization | 2005 |
| Bartlett Hills Lake Dam | Low | Not assessed | 30 | Fire Protection, Stock, Or Small Fish Pond | 1973 |
| Waubonsie Creek Watershed Sites M-5 | Low | Not assessed | 30 | Fire Protection, Stock, Or Small Fish Pond | 1999 |
| Pony Creek Watershed Site 7 | Low | Not assessed | 30 | Fire Protection, Stock, Or Small Fish Pond | 1965 |
| Mule Creek Watershed Sta 27+00 | Low | Not assessed | 29 | Fire Protection, Stock, Or Small Fish Pond | 1956 |
| Mass Dam | Low | Not assessed | 28 | Fire Protection, Stock, Or Small Fish Pond | 1959 |
| Stevenson Dam | Low | Not assessed | 27 | Grade Stabilization | 2023 |
| Mandolfo Dam | Low | Not assessed | 26 | Fire Protection, Stock, Or Small Fish Pond | 1990 |
| Goos-miller Dam | Low | Not assessed | 26 | Fire Protection, Stock, Or Small Fish Pond | 1986 |
| Mule Creek Watershed Site 2 | Low | Not assessed | 25 | Fire Protection, Stock, Or Small Fish Pond | 1953 |
| Mule Creek Watershed Site 1 | Low | Not assessed | 25 | Fire Protection, Stock, Or Small Fish Pond | 1953 |
| Pony Creek Watershed Site 6u | Low | Not assessed | 24 | Fire Protection, Stock, Or Small Fish Pond | 1965 |
| Willow Slough Dam | Low | Not assessed | 8 | Recreation | 1959 |