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 176–200 of 274
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Mill Picayune Watershed Site M-8 Shelby County | 46 | 1963 | Significant | Fair |
| Mill Picayune Watershed Site N-2 Shelby County | 39 | 1972 | Significant | Satisfactory |
| Mississippi River Lock and Dam 10 Clayton County | 43 | 1937 | Significant | Not Available |
| Mississippi River Lock and Dam 11 Dubuque County | 43 | 1937 | Significant | Not Available |
| Mississippi River Lock and Dam 12 Jo Daviess County | 44 | 1938 | Significant | Not Available |
| Mississippi River Lock and Dam 13 Whiteside County | 44 | 1939 | Significant | Not Available |
| Mississippi River Lock and Dam 16 Muscatine County | 34 | 1937 | Significant | Not Available |
| Mississippi River Lock and Dam 17 Mercer County | 47 | 1939 | Significant | Not Available |
| Mississippi River Lock and Dam 18 Des Moines County | 41 | 1937 | Significant | Not Available |
| Mississippi River Locks and Dam 14 Scott County | 39 | 1939 | Significant | Not Available |
| Mississippi River Locks and Dam 15 Scott County | 41 | 1934 | Significant | Not Available |
| Mount Ayr Reservoir Dam Ringgold County | 40 | 1930 | Significant | Fair |
| Murguia Dam Des Moines County | 43 | 1978 | Significant | Satisfactory |
| Muscatine County Roadgrade Dam 14-77-1e Muscatine County | 38 | 1971 | Significant | Fair |
| Muscatine Power & Water Dam Muscatine County | 26 | 1985 | Significant | Satisfactory |
| Napa Valley Dam Dallas County | 32 | 1988 | Significant | Fair |
| Nashua Milldam Chickasaw County | 20 | 1917 | Significant | Fair |
| Newton Koa Campground Dam Jasper County | 20 | — | Significant | Poor |
| Nine Eagles Park Lake Dam Decatur County | 53 | 1930 | Significant | Fair |
| Nodaway Lake Dam Adair County | 35 | 1936 | Significant | Fair |
| North Pigeon Cr Watershed Site M-1 Pottawattamie County | 62 | 1993 | Significant | Satisfactory |
| Northridge Heights Dam Story County | 19 | 2004 | Significant | Not Rated |
| North Woods Lake Dam Decatur County | 57 | 1993 | Significant | Satisfactory |
| Oak Hill Plantation Dam Dallas County | 32 | 2004 | Significant | Satisfactory |
| Oak Lake Dam Kossuth County | 50 | 1971 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.