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
Condition Assessment
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 1526–1550 of 4,124
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Nutt Hollow Subwatershed Site M-6842 Monona County | 26 | 1958 | Low | Not Rated |
| Nutt Hollow Subwatershed Site M-3650 Monona County | 24 | 1958 | Low | Not Rated |
| Nutt Hollow Subwatershed Site M-12855 Monona County | 27 | 1958 | Low | Not Rated |
| Nutt Hollow Subwatershed Site 3-3075 Monona County | 32 | 1958 | Low | Not Rated |
| Nutt Hollow Subwatershed Site 2-6161 Monona County | 18 | 1958 | Low | Not Rated |
| Nutt Hollow Subwatershed Site 2-3176 Monona County | 38 | 1958 | Low | Not Rated |
| Nowak Dam Harrison County | 38 | 2001 | Low | Not Rated |
| North Woods Lake Dam Decatur County | 57 | 1993 | Significant | Satisfactory |
| North Ridge Park Dam Johnson County | 20 | 1993 | Low | Not Rated |
| Northridge Heights Dam Story County | 19 | 2004 | Significant | Not Rated |
| North Pigeon Cr Watershed Site M-4 Pottawattamie County | 51 | 1971 | Low | Not Rated |
| North Pigeon Cr Watershed Site M-3 Pottawattamie County | 58 | 1985 | Low | Not Rated |
| North Pigeon Cr Watershed Site M-1 Pottawattamie County | 62 | 1993 | Significant | Satisfactory |
| North Pigeon Cr Watershed Site M Pottawattamie County | 17 | 1996 | Low | Not Rated |
| North Pigeon Cr Watershed Site 9 Pottawattamie County | 60 | 1978 | Low | Not Rated |
| North Pigeon Cr Watershed Site 7-1 Pottawattamie County | 42 | 1971 | Low | Not Rated |
| North Pigeon Cr Watershed Site 4-1 Pottawattamie County | 57 | 1971 | Low | Not Rated |
| North Pigeon Cr Watershed Site 17 Pottawattamie County | 66 | 1973 | Low | Not Rated |
| North Pigeon Cr Watershed Site 16-1 Pottawattamie County | 33 | 1978 | Low | Not Rated |
| North Pigeon Cr Watershed Site 16 Pottawattamie County | 50 | 1978 | Low | Not Rated |
| North Pigeon Cr Watershed Site 15 Pottawattamie County | 65 | 1978 | Low | Not Rated |
| North Pigeon Cr Watershed Site 13 Pottawattamie County | 64 | 1978 | Low | Not Rated |
| North Pigeon Cr Watershed Site 12-1 Pottawattamie County | 56 | 1978 | Low | Not Rated |
| North Pigeon Cr Watershed Site 11-1 Pottawattamie County | 81 | 1978 | Low | Not Rated |
| North Pigeon Cr Watershed Site 10-1 Pottawattamie County | 59 | 1990 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.