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 1726–1750 of 4,124
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Mohr Dam Crawford County | 21 | 2001 | Low | Not Rated |
| Moeller Dam Crawford County | 34 | 1960 | Low | Not Rated |
| Mleynek Dam Guthrie County | 31 | 1983 | Low | Not Rated |
| Mitch England Dam Ringgold County | 27 | 2016 | Low | Not Rated |
| Mitchell Mill Dam Mitchell County | 19 | 1925 | Low | Satisfactory |
| Mitchell/ Lyon Dam Guthrie County | 36 | 1974 | Low | Not Rated |
| Mississippi River Locks and Dam 15 Scott County | 41 | 1934 | Significant | Not Available |
| Mississippi River Locks and Dam 14 Scott County | 39 | 1939 | Significant | Not Available |
| Mississippi River Lock and Dam 18 Des Moines County | 41 | 1937 | Significant | Not Available |
| Mississippi River Lock and Dam 17 Mercer County | 47 | 1939 | Significant | Not Available |
| Mississippi River Lock and Dam 16 Muscatine County | 34 | 1937 | Significant | Not Available |
| Mississippi River Lock and Dam 13 Whiteside County | 44 | 1939 | Significant | Not Available |
| Mississippi River Lock and Dam 12 Jo Daviess County | 44 | 1938 | Significant | Not Available |
| Mississippi River Lock and Dam 11 Dubuque County | 43 | 1937 | Significant | Not Available |
| Mississippi River Lock and Dam 10 Clayton County | 43 | 1937 | Significant | Not Available |
| Mines of Spain Wetland Development Dam Dubuque County | 11 | 1996 | Low | Not Rated |
| Mills Dam Marshall County | 22 | 1968 | Low | Not Rated |
| Mill Picayune Watershed Site S-8-3 Harrison County | 34 | 1965 | Low | Not Rated |
| Mill Picayune Watershed Site S-8-2 Harrison County | 48 | 1984 | Low | Not Rated |
| Mill Picayune Watershed Site S-8-1 Harrison County | 30 | 1985 | Low | Not Rated |
| Mill Picayune Watershed Site S-4 Harrison County | 29 | 1991 | Low | Not Rated |
| Mill Picayune Watershed Site S-36-1 Harrison County | 31 | 1992 | Low | Not Rated |
| Mill Picayune Watershed Site S-32-1 Harrison County | 34 | 1992 | Low | Not Rated |
| Mill Picayune Watershed Site S-10-7 Harrison County | 45 | 1962 | Low | Not Rated |
| Mill Picayune Watershed Site S-10-2 Harrison County | 49 | 1965 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.