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 1176–1200 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| R&J Investment Dam Davis County | 32 | 1992 | Low | Not Rated |
| Ripperger Dam Union County | 27 | 1986 | Low | Not Rated |
| Ripperger Dam Warren County | 27 | 1989 | Low | Not Rated |
| Ripperger Dam Union County | 32 | 1983 | Low | Not Rated |
| Ripperger Dam Lucas County | 8 | 2001 | Low | Not Rated |
| Riordan Dam Monroe County | 22 | 1967 | Low | Not Rated |
| Riggleman Dam Crawford County | 32 | 1998 | Low | Not Rated |
| Riggleman Dam Crawford County | 28 | 1967 | Low | Not Rated |
| Riemer Dam Marion County | 25 | 1965 | Low | Not Rated |
| Riemenschneider Dam Marshall County | 23 | 1966 | Low | Not Rated |
| Riedmann Dam O'Brien County | 26 | 1967 | Low | Not Rated |
| Rieber Dam Montgomery County | 26 | — | Low | Not Rated |
| Ridinger Dam Union County | 27 | 1964 | Low | Not Rated |
| Ridgley Dam Crawford County | 30 | 1967 | Low | Not Rated |
| Richardt Dam Tama County | 19 | 2000 | Low | Not Rated |
| Richardson Dam Decatur County | 29 | 1985 | Low | Not Rated |
| Richards Dam Ringgold County | 37 | 1999 | Low | Not Rated |
| Richard Hanrahan Dam Madison County | 29 | 2018 | Low | Not Rated |
| Rhoten Dam Dallas County | 31 | 2003 | Low | Not Rated |
| Rhodes Dam Guthrie County | 26 | 1964 | Low | Not Rated |
| Rhinehart Dam Poweshiek County | 29 | 1987 | Low | Not Rated |
| Reynolds Dam Warren County | 26 | 1979 | Low | Not Rated |
| Renaud Dam Polk County | 26 | 1959 | Low | Not Rated |
| Reitz Dam Crawford County | 32 | 1963 | Low | Not Rated |
| Reitter-Lair Marsh Dam Dickinson County | 10 | 1994 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.