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 3376–3400 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Wahlert Dam Guthrie County | 26 | 1986 | Low | Not Rated |
| Wakonda Country Club Dam Polk County | 28 | 1995 | Low | Not Rated |
| Walker Dam Louisa County | 31 | 1984 | Low | Not Rated |
| Walker Dam Des Moines County | 38 | 1985 | Low | Not Rated |
| Walker Dam Warren County | 32 | 1997 | Low | Not Rated |
| Walker Dam Montgomery County | 30 | 2005 | Low | Not Rated |
| Wallace Dam Greene County | 8 | 2024 | Low | Not Rated |
| Wallace Dam Pottawattamie County | 33 | 2004 | Low | Not Rated |
| Walling Subwatershed Sta 18+02 #5 Woodbury County | 35 | 1953 | Low | Not Rated |
| Walling Subwatershed Sta 18+50 #1j Woodbury County | 32 | 1953 | Low | Not Rated |
| Walling Subwatershed Sta 19+11 #1k Woodbury County | 28 | 1953 | Low | Not Rated |
| Walling Subwatershed Sta 19+70 #4 Woodbury County | 31 | 1953 | Low | Not Rated |
| Walling Subwatershed Sta 20+86 #1b Woodbury County | 35 | 1953 | Low | Not Rated |
| Walling Subwatershed Sta 23+00 #1h Woodbury County | 32 | 1953 | Low | Not Rated |
| Walling Subwatershed Sta 31+73 #1 Woodbury County | 28 | 1953 | Low | Not Rated |
| Walling Subwatershed Sta 38+00 #1b Woodbury County | 32 | 1953 | Low | Not Rated |
| Walling Subwatershed Sta 42+05 #4 Woodbury County | 48 | 1953 | Low | Not Rated |
| Walling Subwatershed Sta 55+40 #1 Woodbury County | 50 | 1953 | Low | Not Rated |
| Walling Subwatershed Sta 57+84 #1b Woodbury County | 51 | 1953 | Low | Not Rated |
| Walling Subwatershed Sta 77+50 #1 Woodbury County | 48 | 1953 | Low | Not Rated |
| Walling Subwatershed Sta 78+96 #1b Woodbury County | 32 | 1953 | Low | Not Rated |
| Walling Subwatershed Sta 99+70 #1 Woodbury County | 40 | 1953 | Low | Not Rated |
| Walnut Creek Dam Site 1 Jefferson County | 27 | 1995 | Low | Not Rated |
| Walnut Creek Dam Site 2 Jefferson County | 25 | 1995 | Low | Not Rated |
| Walnut Creek Duck Marsh Dam Ringgold County | 8 | 1959 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.