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 1401–1425 of 4,124
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Pikes Peak Flood Control Dam Clayton County | 49 | 1938 | High | Satisfactory |
| Pierce Dam Lucas County | 31 | 1998 | Low | Not Rated |
| Pierce Dam Cherokee County | 36 | 2006 | Low | Not Rated |
| Pierce Cr. No. 2 Site L-2 Page County | 38 | 1980 | Low | Not Rated |
| Pierce Cr. No. 2 Site K-1 Page County | 29 | 1980 | Low | Not Rated |
| Pierce Cr. No. 2 Site J-6 Page County | 31 | 1980 | Low | Not Rated |
| Pierce Cr. No. 2 Site J-5 Page County | 25 | 1980 | Low | Not Rated |
| Pierce Cr. No. 2 Site J-4 Page County | 35 | 1980 | Low | Not Rated |
| Pierce Cr. No. 2 Site J-2 Page County | 32 | 1980 | Low | Not Rated |
| Pierce Cr. No. 2 Site J-1 Page County | 29 | 1980 | Low | Not Rated |
| Pierce Cr. No. 2 Site H-1 Page County | 39 | 1980 | Low | Not Rated |
| Pierce Creek No 1 Watershed Site 5 Page County | 40 | 1969 | Low | Not Rated |
| Pierce Creek No 1 Watershed Site 16 Page County | 33 | 1969 | Low | Not Rated |
| Pierce Creek No 1 Watershed Site 12 Page County | 36 | 1969 | Low | Not Rated |
| Pierce Creek No 1 Watershed Site 10 Page County | 42 | 1969 | Significant | Satisfactory |
| Pierce Creek No 1 Watershed Site 1 Page County | 39 | 1965 | Low | Not Rated |
| Phipps Dam Polk County | 30 | 1967 | Low | Not Rated |
| Phillips Subwatershed Site M-6600 Monona County | 38 | 1956 | Low | Not Rated |
| Phillips Subwatershed Site M-17312 Monona County | 38 | 1956 | Low | Not Rated |
| Phillips Subwatershed Site M-11985 Monona County | 21 | 1956 | Low | Not Rated |
| Phillips Subwatershed Site 5740 Monona County | 50 | 1956 | Low | Not Rated |
| Phillips Subwatershed Site 3250 Monona County | 53 | 1956 | Low | Not Rated |
| Phillips Subwatershed Site 131 Monona County | 26 | 1956 | Low | Not Rated |
| Phillips Dam Dubuque County | 29 | 1999 | Low | Not Rated |
| Phillips Dam Wapello County | 32 | 1999 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.