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 1676–1700 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Mill Picayune Watershed Site M-2-1 Harrison County | 61 | 1967 | Low | Not Rated |
| Mill Picayune Watershed Site M-18-4 Shelby County | 48 | 1978 | Low | Not Rated |
| Mill Picayune Watershed Site M-16-6 Shelby County | 44 | 1989 | Low | Not Rated |
| Mill Picayune Watershed Site M-16-4 Shelby County | 50 | 1961 | Low | Not Rated |
| Mill Picayune Watershed Site M-16-2 Crawford County | 36 | 1972 | Low | Not Rated |
| Mill Picayune Watershed Site M-14-1 Shelby County | 47 | 1975 | Low | Not Rated |
| Mill Picayune Watershed Site M-11-4 Shelby County | 50 | 1961 | Low | Not Rated |
| Mill Picayune Watershed Site I-1 Harrison County | 35 | 1984 | Low | Not Rated |
| Mill Picayune Watershed Site G-1 Harrison County | 34 | 1986 | Low | Not Rated |
| Mill Picayune Watershed Site E-1 Harrison County | 33 | 1969 | Low | Not Rated |
| Mill Picayune Watershed Site D-3 Harrison County | 42 | 1968 | Low | Not Rated |
| Mill Picayune Watershed Site A-2 Harrison County | 31 | 1966 | Low | Not Rated |
| Mill Picayune Watershed Site 13-1 Shelby County | 47 | 1975 | Low | Not Rated |
| Milligan Dam Union County | 25 | 1973 | Low | Not Rated |
| Miller Subwatershed Site 4-3375 Woodbury County | 32 | 1959 | Low | Not Rated |
| Miller Subwatershed 3-A-1500 Woodbury County | 34 | 1960 | Low | Not Rated |
| Miller Subwatershed 3-2975 Woodbury County | 33 | 1960 | Low | Not Rated |
| Miller & Stender Dam Crawford County | 35 | 1969 | Low | Not Rated |
| Miller-Main Dam Union County | 27 | 1990 | Low | Not Rated |
| Miller Dam Appanoose County | 25 | 1977 | Low | Not Rated |
| Miller Dam Page County | 29 | 1966 | Low | Not Rated |
| Miller Dam Johnson County | 29 | 1971 | Low | Not Rated |
| Miller Dam Iowa County | 39 | 1999 | Low | Not Rated |
| Miller Dam Jefferson County | 20 | 1963 | Low | Not Rated |
| Miller Dam Dallas County | 28 | 1992 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.