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 1–25 of 91
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Zaiser Dam Des Moines County | 61 | 2010 | High | Satisfactory |
| Yellowsmoke Park Dam Crawford County | 59 | 1980 | High | Satisfactory |
| West Lakes Office Park Dam Polk County | 41 | 1990 | High | Satisfactory |
| West Branch Flood Control Dam Johnson County | 24 | 2012 | High | Satisfactory |
| Virden Creek Dam Black Hawk County | 39 | 1979 | High | Satisfactory |
| Viking Road Detention Dam Black Hawk County | 22 | 1994 | High | Fair |
| Twenty-Sixth Street Stormwater Detention Basin Polk County | 43 | 2007 | High | Satisfactory |
| Twelve Mile Creek Watershed Site M-1 Union County | 66 | 1983 | High | Satisfactory |
| Sw Branch Dry Run Creek Stormwater Detention Dam Black Hawk County | 17 | 2003 | High | Satisfactory |
| Storm Lake - Northeast Dredge Spoil Disposal Dam Buena Vista County | 49 | 2005 | High | Satisfactory |
| South Ridge Estates - East Dam Sioux County | 17 | 2007 | High | Satisfactory |
| Southfork Dam Dallas County | 38 | 1988 | High | Satisfactory |
| Smokey Hollow Subwatershed Site 4 Woodbury County | 64 | 1985 | High | Poor |
| Smokey Hollow Subwatershed Site 3 Woodbury County | 58 | 1986 | High | Satisfactory |
| Smokey Hollow Subwatershed Site 2 Woodbury County | 49 | 1986 | High | Fair |
| Smokey Hollow Subwatershed Site 1 Woodbury County | 59 | 1986 | High | Satisfactory |
| Slaughter Flood Control Dam Clayton County | 41 | 1938 | High | Fair |
| Siegel Flood Control Dam Clayton County | 43 | 1938 | High | Satisfactory |
| Scott Blvd Dam Johnson County | 20 | 1980 | High | Satisfactory |
| Schoenewe Dam Des Moines County | 41 | 1978 | High | Poor |
| Saylorville Dam Polk County | 125 | 1975 | High | Not Available |
| Red Rock Dam - Southeast Des Moines and Southwest Pleasant Hill Remedial Works Warren County | 18 | 1968 | High | Not Available |
| Red Haw Dam Lucas County | 43 | 1934 | High | Fair |
| Rathbun Dam Appanoose County | 100 | 1969 | High | Not Available |
| Prescott Flood Prevention Dam Adams County | 27 | 1973 | High | Fair |
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Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.