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 101–125 of 259
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Maffitt Reservoir Dam Dallas County | 79 | 1944 | High | Satisfactory |
| Lower Pine Lake Dam Hardin County | 33 | 1922 | Significant | Satisfactory |
| Lost Grove Lake Scott County | 75 | 2012 | High | Satisfactory |
| Little Whiskey Subwatershed Site M-2 Woodbury County | 42 | 1990 | Significant | Satisfactory |
| Little River Watershed Site M-1 Decatur County | 61 | 1984 | High | Satisfactory |
| Little River Watershed Site 65-3 Decatur County | 22 | 1980 | Significant | Satisfactory |
| Little River Watershed Site 51-1 Decatur County | 30 | 2005 | Significant | Satisfactory |
| Littlefield Lake Dam Audubon County | 45 | 1977 | High | Satisfactory |
| Leutzinger-Lowe Watershed Site M-1 Muscatine County | 46 | 1971 | Significant | Satisfactory |
| Lakewood Hills Dam Black Hawk County | 18 | 1967 | Significant | Satisfactory |
| Lake Wapello Dam Davis County | 57 | 1934 | Significant | Satisfactory |
| Lake Sundown Dam Appanoose County | 51 | 1976 | Significant | Satisfactory |
| Lake Sugema Dam Van Buren County | 50 | 1992 | High | Satisfactory |
| Lake Smith Dam Kossuth County | 21 | 1965 | Significant | Satisfactory |
| Lakeside Development Dam Linn County | 45 | 2005 | Significant | Satisfactory |
| Lake Ponderosa Dam Poweshiek County | 50 | 1969 | High | Satisfactory |
| Lake Panorama Dam Guthrie County | 70 | 1969 | Significant | Satisfactory |
| Lake Pahoja Dam Lyon County | 50 | 1974 | Significant | Satisfactory |
| Lake of Three Fires Dam Taylor County | 32 | 1967 | Significant | Satisfactory |
| Lake of The Hills Dam Scott County | 48 | 1972 | High | Satisfactory |
| Lake Miami Dam Monroe County | 32 | 1966 | Significant | Satisfactory |
| Lake Macbride Dam Johnson County | 56 | 1930 | Significant | Satisfactory |
| Lake Lashane Dam Decatur County | 30 | 1954 | Significant | Satisfactory |
| Lake Keomah Dam Mahaska County | 42 | 1935 | Significant | Satisfactory |
| Lake Icaria Dam (Site M-1-A Walters Cr) Adams County | 56 | 1974 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.