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 1426–1450 of 4,124
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Phillips Dam Clay County | 24 | 1973 | Low | Not Rated |
| Pheasant Ridge Dam Dallas County | 54 | 1972 | Significant | Satisfactory |
| Pfieffer Dam Taylor County | 30 | 1961 | Low | Not Rated |
| Pfab Dam Jackson County | 32 | 1979 | Low | Not Rated |
| Peterson Dam #2 Henry County | 27 | 2005 | Low | Not Rated |
| Peterson Dam Monroe County | 30 | 1965 | Low | Not Rated |
| Peterson Dam Henry County | 18 | 1999 | Low | Not Rated |
| Peterson Dam Woodbury County | 30 | 1966 | Low | Not Rated |
| Peterson Dam Shelby County | 19 | 1993 | Low | Not Rated |
| Peters/Fischer Dam Pottawattamie County | 37 | 1963 | Low | Not Rated |
| Petersen Dam (Merle Petersen) Guthrie County | 29 | 2009 | Low | Not Rated |
| Peters Dam Ringgold County | 31 | 1997 | Low | Not Rated |
| Petchulat Dam Johnson County | 36 | 1993 | Low | Not Rated |
| Perrin Dam Adair County | 21 | 1999 | Low | Not Rated |
| Perkins Dam Greene County | 26 | 1968 | Low | Not Rated |
| Perkins Dam Mahaska County | 30 | 1958 | Low | Not Rated |
| Perkins Dam Mahaska County | 29 | 1970 | Low | Not Rated |
| Perkey Dam Marion County | 23 | 1972 | Low | Not Rated |
| Perion Subwatershed Site B-700 Ida County | 22 | 1949 | Low | Not Rated |
| Perion Subwatershed Site Aa-300 Ida County | 29 | 1949 | Low | Not Rated |
| Perion Subwatershed Site A-7500 Ida County | 23 | 1949 | Low | Not Rated |
| Perdue Dam Pottawattamie County | 28 | 1998 | Low | Not Rated |
| Percival/Putnam Dam Story County | 26 | 1962 | Low | Not Rated |
| Penrose Dam Jackson County | 28 | 1989 | Low | Not Rated |
| Penick Dam Lucas County | 36 | 1997 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.