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 2601–2625 of 3,759
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Graettinger Dam Palo Alto County | 30 | 1972 | Low | Not Rated |
| Graceland College Dam Decatur County | 12 | 1959 | Low | Not Rated |
| Gothier No.2 Subwatershed M-10840 Woodbury County | 35 | 1964 | Low | Not Rated |
| Gothier No.2 Subwatershed 14115 Woodbury County | 24 | 1964 | Low | Not Rated |
| Gosch Dam Monona County | 31 | 1964 | Low | Not Rated |
| Gordin Dam Marion County | 27 | 1995 | Low | Not Rated |
| Goos-Miller Dam Mills County | 26 | 1986 | Low | Not Rated |
| Goose Lake Wma Dam Clinton County | 8 | — | Low | Not Rated |
| Goose Lake - South Pond Dam Clinton County | 7 | 2004 | Low | Not Rated |
| Goos Dam Tama County | 27 | 1987 | Low | Not Rated |
| Goos/Brandt Dam Pottawattamie County | 36 | 1960 | Low | Not Rated |
| Good/Wanamaker Dam Fremont County | 41 | 1962 | Low | Not Rated |
| Goodman Dam Montgomery County | 25 | 1999 | Low | Not Rated |
| Good/Johnson Dam Mills County | 42 | 1961 | Low | Not Rated |
| Goode Dam Monroe County | 28 | 1959 | Low | Not Rated |
| Good Dam Lucas County | 24 | 1986 | Low | Not Rated |
| Good Dam Fremont County | 46 | 1960 | Low | Not Rated |
| Good Dam Davis County | 26 | 1995 | Low | Not Rated |
| Gonseth Dam Clarke County | 25 | 1974 | Low | Not Rated |
| Gonseth Dam Clarke County | 26 | 1992 | Low | Not Rated |
| Goldin Dam Linn County | 29 | 1985 | Low | Not Rated |
| Goettsche Dam Davis County | 18 | 1992 | Low | Not Rated |
| Goeser Dam Crawford County | 42 | 1960 | Low | Not Rated |
| Goellner Dam Wayne County | 26 | 2019 | Low | Not Rated |
| Godfrey Dam Marshall County | 22 | 1992 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.