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

All Dams in Iowa

Showing 526550 of 4,124

Dam NameHeight (ft)YearHazardCondition
Twelve Mile Creek Watershed Site D-62-1

Union County

351985SignificantSatisfactory
Twelve Mile Creek Watershed Site D-44-1

Union County

362008LowNot Rated
Twelve Mile Creek Watershed Site D-44

Union County

342003LowNot Rated
Twelve Mile Creek Watershed Site D-41-A-5

Union County

362006LowNot Rated
Twelve Mile Creek Watershed Site D-41a4

Union County

321993LowNot Rated
Twelve Mile Creek Watershed Site D-41-A-3

Union County

332006LowNot Rated
Twelvemile Creek Watershed Site D-41-A2

Union County

381999LowNot Rated
Twelve Mile Creek Watershed Site D-35

Union County

381988LowNot Rated
Twelve Mile Creek Watershed Site 77

Union County

221979LowNot Rated
Twelve Mile Creek Watershed Site 73

Union County

301979LowNot Rated
Twelve Mile Creek Watershed Site 72-2

Union County

231979LowNot Rated
Twelve Mile Creek Watershed Site 72-1

Union County

271979LowNot Rated
Twelve Mile Creek Watershed Site 71

Union County

231993LowNot Rated
Twelve Mile Creek Watershed Site 68-2

Union County

251979LowNot Rated
Twelve Mile Creek Watershed Site 68-1

Union County

281979LowNot Rated
Twelve Mile Creek Watershed Site 67

Union County

281979LowNot Rated
Twelve Mile Creek Watershed Site 62-5

Union County

362003LowNot Rated
Twelve Mile Creek Watershed Site 62-4

Union County

301979LowNot Rated
Twelve Mile Creek Watershed Site 58

Union County

281985LowNot Rated
Twelve Mile Creek Watershed Site 48

Union County

321985LowNot Rated
Twelve Mile Creek Watershed Site 46

Union County

281993LowNot Rated
Twelve Mile Creek Watershed Site 40-1

Union County

331993LowNot Rated
Twelve Mile Creek Watershed Site 36

Union County

312003LowNot Rated
Twelve Mile Creek Watershed Site 35-2

Union County

301986LowNot Rated
Twelve Mile Creek Watershed Site 30

Union County

351986LowNot Rated
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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.