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 4,124
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Arnold-Armstrong Subwtrshd Site M-14195 Monona County | 29 | 1963 | Low | Not Rated |
| Arnold-Armstrong Subwtrshd Sta 127+05 Monona County | 36 | 1963 | Low | Not Rated |
| Arnold-Armstrong Subwtrshd Sta 171+55 Monona County | 36 | 1963 | Low | Not Rated |
| Arnold-Armstrong Subwtrshd Sta 190+78 Monona County | 31 | 1963 | Low | Not Rated |
| Arnold-Armstrong Subwtrshd Sta 2+05 #3 Monona County | 45 | 1962 | Low | Not Rated |
| Arnold-Armstrong Subwtrshd Sta 23+00 Monona County | 35 | 1963 | Low | Not Rated |
| Arnold-Armstrong Subwtrshd Sta 243+48 Monona County | 26 | 1962 | Low | Not Rated |
| Arnold-Armstrong Subwtrshd Sta27+80 #26 Monona County | 44 | 1961 | Low | Not Rated |
| Arnold-Armstrong Subwtrshd Sta 62+89 #1 Monona County | 20 | 1962 | Low | Not Rated |
| Arnold-Armstrong Subwtrshd Sta 69+48 Monona County | 49 | 1963 | Low | Not Rated |
| Arnold-Armstrong Subwtrshd Sta 76+60 #3 Monona County | 29 | 1963 | Low | Not Rated |
| Arnold-Armstrong Subwtrshd Sta 99+95 Monona County | 24 | 1963 | Low | Not Rated |
| Arnold Dam Lucas County | 28 | 1984 | Low | Not Rated |
| Arnold Dam Wapello County | 29 | 1997 | Low | Not Rated |
| Arnold Lake Dam Story County | 36 | 1964 | Low | Not Rated |
| Arp Dam Johnson County | 31 | 1970 | Low | Not Rated |
| Arp Dam Tama County | 19 | 2021 | Low | Not Rated |
| Arrowhead Investments Dam Madison County | 35 | 2020 | Low | Not Rated |
| Arrowhead Lake Dam Pottawattamie County | 47 | 1959 | Low | Not Rated |
| Arterburn/Kenealy Dam Pottawattamie County | 37 | 1961 | Low | Not Rated |
| Artesian Lake Dam Carroll County | 12 | 1930 | Low | Not Rated |
| Ashmore Dam Adair County | 25 | 1996 | Low | Not Rated |
| Assman #4 Grade Stabilization Structure Crawford County | 39 | 2010 | Low | Not Rated |
| Attril Dam Plymouth County | 32 | 1962 | Low | Not Rated |
| Atwell Dam Lucas County | 30 | 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.