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 2776–2800 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Skidmore Dam Louisa County | 21 | 1989 | Low | Not Rated |
| Skubal Dam Washington County | 31 | 1975 | Low | Not Rated |
| Slater Dam Dallas County | 29 | 1967 | Low | Not Rated |
| Slip Bluff Park Dam Decatur County | 33 | 1970 | Low | Not Rated |
| Sloan Dam Polk County | 27 | 1968 | Low | Not Rated |
| Sloan Dam Davis County | 31 | 1975 | Low | Not Rated |
| Sloppy Dam Marshall County | 28 | 1999 | Low | Not Rated |
| Smith (Bill) Dam Union County | 28 | 2013 | Low | Not Rated |
| Smith Dam Guthrie County | 31 | 1970 | Low | Not Rated |
| Smith Dam Washington County | 26 | 2000 | Low | Not Rated |
| Smith Dam Sac County | 33 | 2015 | Low | Not Rated |
| Smith Dam Ringgold County | 25 | 1984 | Low | Not Rated |
| Smith Dam Monroe County | 26 | 1991 | Low | Not Rated |
| Smith Dam Story County | 33 | 1969 | Low | Not Rated |
| Smith Dam Decatur County | 35 | 1972 | Low | Not Rated |
| Smith Dam Fremont County | 30 | 1988 | Low | Not Rated |
| Smith Dam Cherokee County | 42 | 1996 | Low | Not Rated |
| Smith/Klingborg Dam Cherokee County | 30 | 1960 | Low | Not Rated |
| Smith (Steve) Dam Harrison County | 34 | 2011 | Low | Not Rated |
| Smothers Dam Iowa County | 37 | 1978 | Low | Not Rated |
| Snakenburg Dam Jefferson County | 32 | 1985 | Low | Not Rated |
| Snook Dam Jasper County | 30 | 1960 | Low | Not Rated |
| Snyder Dam Van Buren County | 27 | 2004 | Low | Not Rated |
| Soap Creek Watershed Site 26-127 Davis County | 37 | 2009 | Low | Not Rated |
| Soap Creek Watershed Site 26-32 Davis County | 27 | 1995 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.