Iowa Dams
4,124 dams tracked by the National Inventory of Dams
Total Dams
4,124
High Hazard
91
2.2%
Poor / Unsatisfactory
25
Average Age
46 yrs
Hazard Classification
High91 (2.2%)
Significant274 (6.6%)
Low3,759 (91.1%)
Condition Assessment
Satisfactory259 (6.3%)
Fair81 (2.0%)
Poor / Unsatisfactory25 (0.6%)
Not Rated3,759 (91.1%)
Federal
25
State
141
Local
1,938
Private
2,014
Tallest Dams
- Coralville Dam132 ft
- Saylorville Dam125 ft
- County Basin Dam104 ft
- Rathbun Dam100 ft
- Brushy Creek Dam100 ft
High Hazard Dams
- Coralville DamHigh
- Saylorville DamHigh
- Rathbun DamHigh
- Brushy Creek DamHigh
- Big Creek Barrier DamHigh
Poor Condition Dams
All Dams in Iowa
Showing 1126–1150 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Rubenbauer Dam Tama County | 27 | 1999 | Low | Not Rated |
| Rozendaal Dam Jasper County | 23 | 1965 | Low | Not Rated |
| Rozenboom/Estal Dam Mahaska County | 26 | 1977 | Low | Not Rated |
| Roy/Kemmish Dam Harrison County | 39 | 1960 | Low | Not Rated |
| Routh Dam Ringgold County | 23 | 1994 | Low | Not Rated |
| Rothfus Dam Warren County | 25 | 1969 | Low | Not Rated |
| Roth Dam Washington County | 28 | 1996 | Low | Not Rated |
| Ross Dam Polk County | 26 | 1968 | Low | Not Rated |
| Rosener Dam Crawford County | 28 | 2002 | Low | Not Rated |
| Rose Acre Farm Dam Madison County | 22 | 2005 | Low | Not Rated |
| Rosa Dam Lucas County | 33 | 2001 | Low | Not Rated |
| Rooks Dam Hardin County | 38 | 1959 | Low | Not Rated |
| Ron Pickard Road Structure Jefferson County | 24 | 2009 | Low | Not Rated |
| Rolling Hills Estate Dam - Jones County Jones County | 30 | 2006 | Low | Not Rated |
| Rolling Hills Dam #2 Story County | 40 | 1973 | Low | Not Rated |
| Rolling Hills Dam #1 Story County | 37 | 1973 | Low | Not Rated |
| Rohwer Dam Pottawattamie County | 22 | 1962 | Low | Not Rated |
| Roepke Dam Cherokee County | 28 | 1977 | Low | Not Rated |
| Roeder Dam Tama County | 30 | 1996 | Low | Not Rated |
| Rodney Subwatershed Site 8-2 Monona County | 35 | 1969 | Low | Not Rated |
| Rodney Subwatershed Site 8-1 Monona County | 53 | 1969 | Low | Not Rated |
| Rodney Subwatershed Site 5-1 Monona County | 43 | 1969 | Low | Not Rated |
| Rodney Subwatershed Site 2-1 Monona County | 32 | 1970 | Low | Not Rated |
| Rodney Subwatershed Site 12-2 Monona County | 35 | 1969 | Low | Not Rated |
| Rodgers Dam Marion County | 28 | 1981 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.