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 201–225 of 274
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Old Quarry Lake Dam Cerro Gordo County | 13 | 1977 | Significant | Fair |
| Orient Lake Dam Adair County | 23 | 1969 | Significant | Satisfactory |
| Otter Creek Lake Dam Tama County | 45 | 1968 | Significant | Satisfactory |
| Pheasant Ridge Dam Dallas County | 54 | 1972 | Significant | Satisfactory |
| Pierce Creek No 1 Watershed Site 10 Page County | 42 | 1969 | Significant | Satisfactory |
| Pony Creek Watershed Site 10 Mills County | 60 | 1966 | Significant | Satisfactory |
| Pony Creek Watershed Site 30 Mills County | 49 | 1964 | Significant | Satisfactory |
| Prairie Rose Lake Dam Shelby County | 55 | 1960 | Significant | Satisfactory |
| Prairie Trail - Cp5 Polk County | 24 | 2014 | Significant | Not Rated |
| Prairie Trail Development - North Dam Polk County | 22 | 2008 | Significant | Not Rated |
| Prairie Trail Development - South Dam Polk County | 31 | 2008 | Significant | Not Rated |
| Progress Park Dam Johnson County | 23 | 2005 | Significant | Satisfactory |
| Railroad Lake Dam Scott County | 35 | 1983 | Significant | Satisfactory |
| Rankins Brothers Dam Jasper County | 29 | 1976 | Significant | Not Rated |
| Renaud Dam Poweshiek County | 31 | 1986 | Significant | Not Rated |
| Roberts Creek Dam Marion County | 60 | 1968 | Significant | Fair |
| Rock Creek Dam Jasper County | 33 | — | Significant | Fair |
| Rock Valley Lake Dam Wayne County | 39 | 2008 | Significant | Fair |
| Rodgers Park Lake Dam Benton County | 30 | 1977 | Significant | Fair |
| Rolling Hills Dam Johnson County | 20 | 2002 | Significant | Not Rated |
| Scott Basin Dam Guthrie County | 52 | 2013 | Significant | Fair |
| Se Des Moines Stormwater Det. Dam #3 Polk County | 34 | 1999 | Significant | Satisfactory |
| Se Des Moines Stormwater Det. Dam #4 Polk County | 26 | 1999 | Significant | Satisfactory |
| Seippel Road Dam Dubuque County | 34 | 2000 | Significant | Not Rated |
| Shryock Dam Polk County | 30 | 1963 | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.