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 1–25 of 274
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Woodlands Parkway Dam Polk County | 28 | 1964 | Significant | Fair |
| Woodland Lake Dam Polk County | 43 | 1971 | Significant | Satisfactory |
| Woodbury County Roadgrade Dam 36-86-42 Woodbury County | 42 | 1990 | Significant | Satisfactory |
| White Oak Lake Dam Mahaska County | 39 | 1983 | Significant | Satisfactory |
| Whispering Pines Dam Muscatine County | 28 | 2006 | Significant | Fair |
| West Lenox Reservoir Dam Taylor County | 25 | 1913 | Significant | Not Rated |
| West Lake Dam (Mahaska Co) Mahaska County | 32 | 1989 | Significant | Satisfactory |
| West Lake Dam Clarke County | 58 | 1935 | Significant | Satisfactory |
| West 32nd St Stormwater - Upper Dam Dubuque County | 23 | 2009 | Significant | Satisfactory |
| West 32nd St Stormwater - Lower Dam Dubuque County | 8 | 2009 | Significant | Satisfactory |
| Wayne Co. Roadgrade Dam - Clow Site Wayne County | 34 | 1996 | Significant | Satisfactory |
| Wayne Co. Roadgrade Dam 21-67-22 Wayne County | 42 | 1996 | Significant | Satisfactory |
| Waubonsie Cr. Watershed Site M-1 Mills County | 42 | 1978 | Significant | Satisfactory |
| Waubonsie Cr. Watershed Site 3-8 Mills County | 69 | 1989 | Significant | Satisfactory |
| Waubonsie Cr. Watershed Site 3-7 Mills County | 47 | 1989 | Significant | Satisfactory |
| Waubonsie Cr. Watershed Site 3-3 Mills County | 49 | 1993 | Significant | Satisfactory |
| Waubonsie Cr. Watershed Site 3 Mills County | 43 | 1994 | Significant | Satisfactory |
| Waubonsie Cr. Watershed Site 23-3 Mills County | 53 | 1987 | Significant | Satisfactory |
| Waubonsie Cr. Watershed Site 11-1 Mills County | 71 | 1977 | Significant | Satisfactory |
| Ward Business Park Dam Polk County | 17 | 2001 | Significant | Not Rated |
| Walton Lake Dam Jefferson County | 35 | 1900 | Significant | Satisfactory |
| Volga Lake Dam Fayette County | 45 | 1980 | Significant | Satisfactory |
| Viking Lake Dam Montgomery County | 69 | 1957 | Significant | Fair |
| Upper Pine Lake Dam Hardin County | 42 | 1934 | Significant | Satisfactory |
| Upper Centerville Reservoir Dam Appanoose County | 48 | 1912 | Significant | Fair |
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Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.