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 1376–1400 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Hopp Dam (Lower Site) Mills County | 30 | 2005 | Low | Not Rated |
| Hopp Dam (Upper Site) Mills County | 36 | 2005 | Low | Not Rated |
| Horras Dam Jefferson County | 24 | 1995 | Low | Not Rated |
| Houghton Dam Union County | 25 | 1967 | Low | Not Rated |
| Hound Dog Watershed Site B-1 Fremont County | 41 | 1963 | Low | Not Rated |
| Hound Dog Watershed Site B-10 Fremont County | 23 | 1962 | Low | Not Rated |
| Hound Dog Watershed Site B-13 Fremont County | 26 | 1963 | Low | Not Rated |
| Hound Dog Watershed Site B-2 Fremont County | 41 | 1963 | Low | Not Rated |
| Hound Dog Watershed Site B-4 Fremont County | 41 | 1963 | Low | Not Rated |
| Hound Dog Watershed Site B-6 Fremont County | 41 | 1963 | Low | Not Rated |
| Hound Dog Watershed Site B-7 Fremont County | 36 | 1962 | Low | Not Rated |
| Hound Dog Watershed Site B-8 Fremont County | 34 | 1963 | Low | Not Rated |
| Hound Dog Watershed Site B-9 Fremont County | 28 | 1963 | Low | Not Rated |
| Hound Dog Watershed Site F-16 Fremont County | 36 | 1962 | Low | Not Rated |
| Houston/Rogers Dam Crawford County | 43 | 1961 | Low | Not Rated |
| Hraha Dam Warren County | 25 | 2005 | Low | Not Rated |
| Hubbard Dam Union County | 24 | 1971 | Low | Not Rated |
| Hudnutt Dam Poweshiek County | 22 | 2002 | Low | Not Rated |
| Huebner Dam Appanoose County | 32 | 1989 | Low | Not Rated |
| Huebner Dam Appanoose County | 38 | 1978 | Low | Not Rated |
| Huff Dam Van Buren County | 32 | 2003 | Low | Not Rated |
| Huffman Dam Keokuk County | 31 | 1993 | Low | Not Rated |
| Huff Subwatershed 3-6069 Monona County | 40 | 1963 | Low | Not Rated |
| Huff Subwatershed Sta 122+69 #1 Monona County | 28 | 1963 | Low | Not Rated |
| Huff Subwatershed Sta 42+70 #1 Monona County | 45 | 1963 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.