75Total Dams
4High Hazard
3Significant
Dam Safety in Plymouth County, Iowa
Plymouth County has 75 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 3 carry a significant hazard classification. Currently, 2 dams have a condition assessment of poor or unsatisfactory.
The average dam in Plymouth County is 55 years old. The most common purpose is fire protection, stock, or small fish pond. The tallest dam is Horse Lake Dam at 67 ft.
Explore more: Oldest dams in Iowa · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Deer Creek Dam | High | Satisfactory | 55 | Recreation | 1995 |
| Held Watershed Site E-3 | High | Poor | 43 | Flood Risk Reduction | 1978 |
| Focht & Schindel Dam | High | Fair | 41 | Fire Protection, Stock, Or Small Fish Pond | 1970 |
| Held Watershed Site E-4 | High | Poor | 37 | Flood Risk Reduction | 1978 |
| Horse Lake Dam | Significant | Satisfactory | 67 | Fire Protection, Stock, Or Small Fish Pond | 1963 |
| Kennedy & Johns Dam | Significant | Not assessed | 40 | Fire Protection, Stock, Or Small Fish Pond | 1975 |
| Iowa Noname35 | Significant | Not assessed | 35 | Fire Protection, Stock, Or Small Fish Pond | 1967 |
| Gant Creek Watershed Site A-5 | Low | Not assessed | 58 | Fire Protection, Stock, Or Small Fish Pond | 1969 |
| Held Watershed Site A-1 | Low | Not assessed | 54 | Fire Protection, Stock, Or Small Fish Pond | 1965 |
| West Sunnyside Watershed Site C-3 | Low | Not assessed | 54 | Fire Protection, Stock, Or Small Fish Pond | 1973 |
| Bacon Creek Watershed Site L-1 | Low | Not assessed | 53 | Flood Risk Reduction | 1976 |
| Leekly Dam | Low | Not assessed | 52 | Fire Protection, Stock, Or Small Fish Pond | 1968 |
| Gant Creek Watershed Site C-6 | Low | Not assessed | 52 | Fire Protection, Stock, Or Small Fish Pond | 1974 |
| West Sunnyside Watershed Site C-4 | Low | Not assessed | 52 | Fire Protection, Stock, Or Small Fish Pond | 1973 |
| Iowa Noname36 | Low | Not assessed | 50 | Fire Protection, Stock, Or Small Fish Pond | 1965 |
| Barcal Dam | Low | Not assessed | 49 | Fire Protection, Stock, Or Small Fish Pond | 1959 |
| Frank & Udell Dam | Low | Not assessed | 49 | Fire Protection, Stock, Or Small Fish Pond | 1976 |
| West Sunnyside Watershed Site C-1-2 | Low | Not assessed | 49 | Fire Protection, Stock, Or Small Fish Pond | 1969 |
| Blume/haley Dam | Low | Not assessed | 47 | Fire Protection, Stock, Or Small Fish Pond | 1966 |
| Gant Creek Watershed Site D-5 | Low | Not assessed | 47 | Fire Protection, Stock, Or Small Fish Pond | 1967 |
| Wingert/freymann Dam | Low | Not assessed | 46 | Fire Protection, Stock, Or Small Fish Pond | 1961 |
| Held Watershed Site A-2 | Low | Not assessed | 46 | Fire Protection, Stock, Or Small Fish Pond | 1965 |
| Held Watershed Site B-6 | Low | Not assessed | 44 | Fire Protection, Stock, Or Small Fish Pond | 1965 |
| Hummel Dam | Low | Not assessed | 43 | Fire Protection, Stock, Or Small Fish Pond | 1966 |
| Held Watershed Site B-2 | Low | Not assessed | 43 | Fire Protection, Stock, Or Small Fish Pond | 1965 |
| Held Watershed Site B-3 | Low | Not assessed | 43 | Fire Protection, Stock, Or Small Fish Pond | 1965 |
| Banks Dam | Low | Not assessed | 42 | Fire Protection, Stock, Or Small Fish Pond | 1966 |
| Held Watershed Site D-7 | Low | Not assessed | 42 | Fire Protection, Stock, Or Small Fish Pond | 1978 |
| Bengal Dam | Low | Not assessed | 41 | Fire Protection, Stock, Or Small Fish Pond | 1973 |
| MUD Creek Subwatershed Site 15-2 | Low | Not assessed | 41 | Fire Protection, Stock, Or Small Fish Pond | 1973 |
| Held Watershed Site D-1 | Low | Not assessed | 40 | Fire Protection, Stock, Or Small Fish Pond | 1979 |
| Gant Creek Watershed Site A-2 | Low | Not assessed | 40 | Fire Protection, Stock, Or Small Fish Pond | 1969 |
| South Hungerford 2 Watershed Site 11 | Low | Not assessed | 40 | Fire Protection, Stock, Or Small Fish Pond | 1964 |
| Gant Creek Watershed Site C-3 | Low | Not assessed | 40 | Fire Protection, Stock, Or Small Fish Pond | 1974 |
| Held Watershed Site A-3 | Low | Not assessed | 38 | Fire Protection, Stock, Or Small Fish Pond | 1965 |
| West Sunnyside Watershed Site A-1 | Low | Not assessed | 38 | Fire Protection, Stock, Or Small Fish Pond | 1969 |
| Gant Creek Watershed Site B-1 | Low | Not assessed | 38 | Fire Protection, Stock, Or Small Fish Pond | 1967 |
| Sherman Dam | Low | Not assessed | 37 | Fire Protection, Stock, Or Small Fish Pond | 1962 |
| Gant Creek Watershed Site A-7 | Low | Not assessed | 37 | Fire Protection, Stock, Or Small Fish Pond | 1969 |
| Gant Creek Watershed Site C-4 | Low | Not assessed | 37 | Fire Protection, Stock, Or Small Fish Pond | 1974 |
| MUD Creek Subwatershed Site 15-1 | Low | Not assessed | 36 | Fire Protection, Stock, Or Small Fish Pond | 1973 |
| Gant Creek Watershed Site D-3 | Low | Not assessed | 36 | Fire Protection, Stock, Or Small Fish Pond | 1967 |
| Elkhorn No.2 Subwatershed 1-3112 | Low | Not assessed | 36 | Fire Protection, Stock, Or Small Fish Pond | 1961 |
| Elkhorn No.2 Subwatershed Site 1-3 | Low | Not assessed | 36 | Fire Protection, Stock, Or Small Fish Pond | 1984 |
| Williams Dam | Low | Not assessed | 35 | Fire Protection, Stock, Or Small Fish Pond | 1962 |
| Banks Dam | Low | Not assessed | 35 | Fire Protection, Stock, Or Small Fish Pond | 1967 |
| West Sunnyside Watershed Site C-1 | Low | Not assessed | 35 | Fire Protection, Stock, Or Small Fish Pond | 1969 |
| Gant Creek Watershed Site A-4 | Low | Not assessed | 34 | Fire Protection, Stock, Or Small Fish Pond | 1969 |
| West Sunnyside Watershed Site E-1 | Low | Not assessed | 34 | Fire Protection, Stock, Or Small Fish Pond | 1970 |
| West Sunnyside Watershed Site C-1-1 | Low | Not assessed | 34 | Fire Protection, Stock, Or Small Fish Pond | 1959 |
| Held Watershed Site D-4 | Low | Not assessed | 33 | Fire Protection, Stock, Or Small Fish Pond | 1978 |
| West Sunnyside Watershed Site C-6 | Low | Not assessed | 33 | Fire Protection, Stock, Or Small Fish Pond | 1970 |
| Attril Dam | Low | Not assessed | 32 | Fire Protection, Stock, Or Small Fish Pond | 1962 |
| Bacon Creek Watershed Site M-1 | Low | Not assessed | 32 | Flood Risk Reduction | 1976 |
| Gant Creek Watershed Site D-6 | Low | Not assessed | 30 | Fire Protection, Stock, Or Small Fish Pond | 1967 |
| Arlington Subwatershed Sta 26+80 #12 | Low | Not assessed | 30 | Fire Protection, Stock, Or Small Fish Pond | 1965 |
| West Sunnyside Watershed Site C-5 | Low | Not assessed | 29 | Fire Protection, Stock, Or Small Fish Pond | 1973 |
| Arlington Subwatershed Sta 38+80 #11 | Low | Not assessed | 29 | Fire Protection, Stock, Or Small Fish Pond | 1965 |
| Baldwin Dam | Low | Not assessed | 28 | Fire Protection, Stock, Or Small Fish Pond | 1998 |
| Conley Dam | Low | Not assessed | 28 | Fire Protection, Stock, Or Small Fish Pond | 1975 |
| South Hungerford 2 Watershed Site 5 | Low | Not assessed | 28 | Fire Protection, Stock, Or Small Fish Pond | 1967 |
| Gant Creek Watershed Site C-2 | Low | Not assessed | 28 | Fire Protection, Stock, Or Small Fish Pond | 1974 |
| Diede Dam | Low | Not assessed | 27 | Fire Protection, Stock, Or Small Fish Pond | 1999 |
| South Hungerford 2 Watershed Site 4 | Low | Not assessed | 27 | Fire Protection, Stock, Or Small Fish Pond | 1965 |
| Elkhorn No.2 Subwatershed 1-5000 | Low | Not assessed | 27 | Fire Protection, Stock, Or Small Fish Pond | 1961 |
| Held Watershed Site B-1 | Low | Not assessed | 26 | Fire Protection, Stock, Or Small Fish Pond | 1965 |
| South Hungerford 2 Watershed Site 8 | Low | Not assessed | 26 | Fire Protection, Stock, Or Small Fish Pond | 1976 |
| Gant Creek Watershed Site D-1 | Low | Not assessed | 26 | Fire Protection, Stock, Or Small Fish Pond | 1967 |
| Olmschied Dam | Low | Not assessed | 25 | Fire Protection, Stock, Or Small Fish Pond | 1974 |
| South Hungerford 2 Watershed Site 9 | Low | Not assessed | 25 | Fire Protection, Stock, Or Small Fish Pond | 1976 |
| Held Watershed Site B-5 | Low | Not assessed | 24 | Fire Protection, Stock, Or Small Fish Pond | 1965 |
| Gant Creek Watershed Site A-6 | Low | Not assessed | 24 | Fire Protection, Stock, Or Small Fish Pond | 1969 |
| West Sunnyside Watershed Site C-8 | Low | Not assessed | 24 | Fire Protection, Stock, Or Small Fish Pond | 1970 |
| Vos Dam | Low | Not assessed | 23 | Fire Protection, Stock, Or Small Fish Pond | 1979 |
| Henry Dam | Low | Not assessed | 19 | Fire Protection, Stock, Or Small Fish Pond | 1991 |