33Total Dams
2High Hazard
6Significant
Dam Safety in Poweshiek County, Iowa
Poweshiek County has 33 dams tracked in the National Inventory of Dams. Of these, 2 are classified as high hazard — meaning failure would probably cause loss of human life. Another 6 carry a significant hazard classification.
The average dam in Poweshiek County is 40 years old. The most common purpose is fire protection, stock, or small fish pond. The tallest dam is Lake Ponderosa Dam at 50 ft.
Explore more: Oldest dams in Iowa · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Lake Ponderosa Dam | High | Satisfactory | 50 | Other | 1969 |
| Lake Cimarron | High | Satisfactory | 27 | Recreation | 2012 |
| Holiday Lake Dam | Significant | Satisfactory | 50 | Recreation | 1962 |
| Diamond Lake Dam (poweshiek Co) | Significant | Satisfactory | 40 | Water Supply | 1952 |
| Renaud Dam | Significant | Not assessed | 31 | Fire Protection, Stock, Or Small Fish Pond | 1986 |
| Diamond Lake Watershed Site C-14 | Significant | Satisfactory | 29 | Fire Protection, Stock, Or Small Fish Pond | 1972 |
| Hudnutt Dam | Significant | Not assessed | 28 | Fire Protection, Stock, Or Small Fish Pond | 1972 |
| Diamond Lake Watershed Site B-8 | Significant | Fair | 27 | Fire Protection, Stock, Or Small Fish Pond | 1971 |
| Heishman Dam | Low | Not assessed | 40 | Recreation | 2017 |
| Van Wyk/vogel Dam | Low | Not assessed | 33 | Fire Protection, Stock, Or Small Fish Pond | 1989 |
| Baker Dam | Low | Not assessed | 31 | Fire Protection, Stock, Or Small Fish Pond | 1977 |
| Lannom Dam | Low | Not assessed | 30 | Fire Protection, Stock, Or Small Fish Pond | 1990 |
| Malcom Dam | Low | Not assessed | 30 | Fire Protection, Stock, Or Small Fish Pond | 2006 |
| Rhinehart Dam | Low | Not assessed | 29 | Fire Protection, Stock, Or Small Fish Pond | 1987 |
| Nikkel Dam | Low | Not assessed | 29 | Fire Protection, Stock, Or Small Fish Pond | 1990 |
| Wilkinson Dam | Low | Not assessed | 29 | Grade Stabilization | 2005 |
| Wagner Dam | Low | Not assessed | 29 | Grade Stabilization | 2001 |
| Diamond Lake Watershed Site B-9 | Low | Not assessed | 28 | Flood Risk Reduction | 1972 |
| Wilkinson Dam | Low | Not assessed | 27 | Fire Protection, Stock, Or Small Fish Pond | 1981 |
| Hughes Dam | Low | Not assessed | 27 | Grade Stabilization | 2010 |
| Van Roekel Dam | Low | Not assessed | 27 | Fire Protection, Stock, Or Small Fish Pond | 1996 |
| Bernstein Dam | Low | Not assessed | 27 | Fire Protection, Stock, Or Small Fish Pond | 1979 |
| Nikkel Dam | Low | Not assessed | 27 | Fire Protection, Stock, Or Small Fish Pond | 1976 |
| Mc Clain Dam | Low | Not assessed | 26 | Fire Protection, Stock, Or Small Fish Pond | 1969 |
| Diamond Lake Campground Dam | Low | Not assessed | 26 | Recreation | 2008 |
| Barclay Dam | Low | Not assessed | 25 | Fire Protection, Stock, Or Small Fish Pond | 1966 |
| Lewis Dam | Low | Not assessed | 25 | Fire Protection, Stock, Or Small Fish Pond | 1963 |
| Combs Dam | Low | Not assessed | 23 | Fire Protection, Stock, Or Small Fish Pond | 1974 |
| Hudnutt Dam | Low | Not assessed | 22 | Fire Protection, Stock, Or Small Fish Pond | 2002 |
| Ever-tru Pond | Low | Not assessed | 22 | Flood Risk Reduction | 2016 |
| Nagel Dam | Low | Not assessed | 22 | Recreation | 2015 |
| Vogel Dam | Low | Not assessed | 19 | Fire Protection, Stock, Or Small Fish Pond | 1976 |
| Diamond Lake Watershed Site A-2 | Low | Not assessed | 18 | Fire Protection, Stock, Or Small Fish Pond | 1966 |