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 3026–3050 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Swine Graphics #1 Clarke County | 44 | 2000 | Low | Not Rated |
| Swine Graphics Dam #2 Clarke County | 47 | 2005 | Low | Not Rated |
| Swiss Lake Estates Dam Fayette County | 44 | 1967 | Low | Fair |
| Talmage Hill Dam Union County | 25 | 1985 | Low | Not Rated |
| Tapken Dam Adair County | 28 | 1976 | Low | Not Rated |
| Taplin Dam Clinton County | 28 | 1999 | Low | Not Rated |
| Tate Dam Crawford County | 38 | 1958 | Low | Not Rated |
| Taylor 1 Dam Fremont County | 29 | 1963 | Low | Not Rated |
| Taylor Dam Mahaska County | 28 | 1996 | Low | Not Rated |
| Taylor Dam Fremont County | 23 | 1963 | Low | Not Rated |
| Taylor Dam Fremont County | 37 | 1969 | Low | Not Rated |
| Taylor Dam Davis County | 21 | 2007 | Low | Not Rated |
| Teeples Dam Greene County | 34 | 2002 | Low | Not Rated |
| Templeton Farms Dam Guthrie County | 32 | 1985 | Low | Not Rated |
| Tenhulzen Dam Crawford County | 20 | 1991 | Low | Not Rated |
| Terlouw Dam Jasper County | 29 | 1968 | Low | Not Rated |
| Terlouw/Van Wyk Dam Jasper County | 23 | 1978 | Low | Not Rated |
| Terrell Dam Wapello County | 30 | 1978 | Low | Not Rated |
| Terrill Dam Louisa County | 31 | 2000 | Low | Not Rated |
| Terrill/Garst Wetlands Dam Greene County | 8 | 1988 | Low | Not Rated |
| Thacther Dam Warren County | 22 | 1969 | Low | Not Rated |
| Thayer Lake Dam Union County | 30 | 1930 | Low | Not Rated |
| Theobold Subwatershed 6975 Woodbury County | 38 | 1948 | Low | Not Rated |
| Thf Stormwater Detention Dam Scott County | 29 | 2000 | Low | Not Rated |
| Thomas Dam Cherokee County | 35 | 2000 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.