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 3026–3050 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| De Heer Reclamation Dam Marion County | 31 | 2004 | Low | Not Rated |
| De Hart Dam Van Buren County | 25 | 1966 | Low | Not Rated |
| De Geus Dam Marion County | 26 | 1999 | Low | Not Rated |
| Deer Ridge Dam Union County | 34 | 1983 | Low | Not Rated |
| Deere & Co. Dam Black Hawk County | 10 | 1981 | Low | Not Rated |
| Deere & Co. Dam Scott County | 15 | 1980 | Low | Not Rated |
| Deemer Dam Wayne County | 28 | 1984 | Low | Not Rated |
| Decorah Upper Milldam Winneshiek County | 8 | 1911 | Low | Not Rated |
| Decorah Lower Milldam Winneshiek County | 27 | 1973 | Low | Not Rated |
| Decatur County Roadgrade Dam 14-69-27 Decatur County | 30 | 1987 | Low | Not Rated |
| De Bruin Dam Jasper County | 32 | 1966 | Low | Not Rated |
| Debord/Brown Dam Cass County | 26 | 1968 | Low | Not Rated |
| Deal Dam Kossuth County | 31 | 1976 | Low | Not Rated |
| Deal Dam Greene County | 27 | 1965 | Low | Not Rated |
| Day Dam Washington County | 24 | 1971 | Low | Not Rated |
| Dawson Dam Des Moines County | 40 | 1972 | Low | Not Rated |
| Davis Timber Park Dam Carroll County | 24 | 1980 | Low | Not Rated |
| Davis Subwatershed M-7920 Woodbury County | 36 | 1958 | Low | Not Rated |
| Davis Subwatershed M-3398 Woodbury County | 47 | 1958 | Low | Not Rated |
| Davis Subwatershed M-2410 Woodbury County | 22 | 1958 | Low | Not Rated |
| Davis Subwatershed M-18560 Woodbury County | 35 | 1958 | Low | Not Rated |
| Davis Subwatershed M-14077 Woodbury County | 34 | 1958 | Low | Not Rated |
| Davis Subwatershed M-10843 Woodbury County | 36 | 1958 | Low | Not Rated |
| Davis Subwatershed 7-6044 Woodbury County | 33 | 1958 | Low | Not Rated |
| Davis Subwatershed 7-3615 Woodbury County | 54 | 1958 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.