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 26–50 of 274
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Beaver Lake Dam Dallas County | 43 | 1990 | Significant | Satisfactory |
| Bedford Water Supply Dam Taylor County | 44 | 1969 | Significant | Fair |
| Bernstein Dam Mahaska County | 35 | 1976 | Significant | Not Rated |
| Big Hollow Dam Des Moines County | 60 | 2008 | Significant | Satisfactory |
| Big Whiskey 1 Subwatershed Site 3-1 Woodbury County | 38 | 1968 | Significant | Fair |
| Binder Lake Dam Adams County | 35 | 1942 | Significant | Satisfactory |
| Black Hawk Lake Dam Sac County | 12 | 1916 | Significant | Satisfactory |
| Blockton Watershed Site S-5 Taylor County | 41 | 1993 | Significant | Satisfactory |
| Blue Grass Lake Dam Scott County | 28 | 1974 | Significant | Satisfactory |
| Bobwhite Lake Dam Wayne County | 27 | 1900 | Significant | Fair |
| Briggs Woods Lake Dam Hamilton County | 44 | 1968 | Significant | Satisfactory |
| Brown Deer Golf Course Dam Johnson County | 46 | 1970 | Significant | Satisfactory |
| Burlington Northern Dam Des Moines County | 25 | 1930 | Significant | Not Rated |
| Cedar Creek Dam Madison County | 50 | 1939 | Significant | Satisfactory |
| Cedar Rapids Milldam (5 In 1) Linn County | 16 | 1978 | Significant | Satisfactory |
| Chad Leffler Dam Monroe County | 29 | 2016 | Significant | Satisfactory |
| Copper Creek Estates Dam Polk County | 21 | 2002 | Significant | Satisfactory |
| Copper Creek Lake Dam Polk County | 31 | 1995 | Significant | Satisfactory |
| Corning Reservoir Dam Adams County | 30 | 1917 | Significant | Satisfactory |
| Cory Basin Dam Guthrie County | 22 | 2016 | Significant | Satisfactory |
| Corydon Reservoir Dam Wayne County | 26 | 1974 | Significant | Satisfactory |
| Country Club Business Park Dam Dallas County | 18 | 1989 | Significant | Fair |
| County Basin Dam Guthrie County | 104 | 2006 | Significant | Satisfactory |
| Crab Tree Lake Dam Marshall County | 33 | 1948 | Significant | Satisfactory |
| Crane'S Pond Dam Henry County | 12 | 1989 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.