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 1626–1650 of 4,124
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Mullahy Wetland Dam Henry County | 8 | 2001 | Low | Not Rated |
| Mule Creek Watershed Sta 97+60 Mills County | 34 | 1955 | Low | Not Rated |
| Mule Creek Watershed Sta 89+00 Mills County | 45 | 1956 | Low | Not Rated |
| Mule Creek Watershed Sta 75+32 Mills County | 45 | 1956 | Low | Not Rated |
| Mule Creek Watershed Sta 60+00 Mills County | 46 | 1955 | Low | Not Rated |
| Mule Creek Watershed Sta 56+03 Mills County | 35 | 1956 | Low | Not Rated |
| Mule Creek Watershed Sta 48+87 Mills County | 44 | 1955 | Low | Not Rated |
| Mule Creek Watershed Sta 48+00 Mills County | 37 | 1956 | Low | Not Rated |
| Mule Creek Watershed Sta 38+20 Mills County | 45 | 1955 | Low | Not Rated |
| Mule Creek Watershed Sta 34+00 Mills County | 34 | 1955 | Low | Not Rated |
| Mule Creek Watershed Sta 30+00 Mills County | 35 | 1955 | Low | Not Rated |
| Mule Creek Watershed Sta 27+00 Mills County | 29 | 1956 | Low | Not Rated |
| Mule Creek Watershed Sta 16+00 Mills County | 32 | 1956 | Low | Not Rated |
| Mule Creek Watershed Site 7 Mills County | 37 | 1954 | Low | Not Rated |
| Mule Creek Watershed Site 2 Mills County | 25 | 1953 | Low | Not Rated |
| Mule Creek Watershed Site 1 Mills County | 25 | 1953 | Low | Not Rated |
| Mule Creek Watershed 7837 Mills County | 32 | 1954 | Low | Not Rated |
| Muir Dam Greene County | 30 | 1978 | Low | Not Rated |
| Muhlbauer Dam Crawford County | 27 | 2001 | Low | Not Rated |
| Mueller - Mitchell Dam Adair County | 25 | 2008 | Low | Not Rated |
| Mud Creek Subwatershed Site 8-2 Woodbury County | 30 | 1973 | Low | Not Rated |
| Mud Creek Subwatershed Site 8-1 Woodbury County | 33 | 1973 | Low | Not Rated |
| Mud Creek Subwatershed Site 6-1 Woodbury County | 32 | 1973 | Low | Not Rated |
| Mud Creek Subwatershed Site 15-2 Plymouth County | 41 | 1973 | Low | Not Rated |
| Mud Creek Subwatershed Site 15-1 Plymouth County | 36 | 1973 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.