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 36763700 of 3,759

Dam NameHeight (ft)YearHazardCondition
Williamson Dam

Appanoose County

301995LowNot Rated
Williamson Pond Dam

Lucas County

321915LowNot Rated
Willow Creek Subwatershed Site 10-3

Woodbury County

341968LowSatisfactory
Willow Creek Subwatershed Site 3-1

Woodbury County

391968LowNot Rated
Willow Creek Subwatershed Site M-1

Woodbury County

451968LowNot Rated
Willow Creek Subwatershed Site M-2

Woodbury County

381968LowNot Rated
Willow Creek Subwatershed Site M-3

Woodbury County

301968LowNot Rated
Willow Creek Subwatershed Site M-4

Woodbury County

251968LowNot Rated
Willow Lake Dam

Harrison County

311976LowNot Rated
Willow Slough Dam

Mills County

81959LowNot Rated
Wilson Dam

Lee County

351999LowNot Rated
Wilson Lake Dam

Taylor County

291967LowNot Rated
Wilson Road Ford

Allamakee County

8LowNot Rated
Wilty Dam

Davis County

301977LowNot Rated
Windmill Lake Dam

Taylor County

351969LowFair
Windy Hill Subwatershed Site 2-1

Woodbury County

391975LowNot Rated
Windy Hill Subwatershed Site 2-2

Woodbury County

331975LowNot Rated
Windy Hill Subwatershed Site 3-2

Woodbury County

421975LowNot Rated
Windy Hill Subwatershed Site 3a-1

Woodbury County

341975LowNot Rated
Windy Hill Subwatershed Site 3d-2

Woodbury County

331975LowNot Rated
Windy Hill Subwatershed Site 5-1

Woodbury County

361975LowNot Rated
Windy Hill Subwatershed Site 5-3

Woodbury County

521975LowNot Rated
Windy Hill Subwatershed Site 5-4

Woodbury County

341975LowNot Rated
Windy Hill Subwatershed Site 5b-1

Woodbury County

471975LowNot Rated
Wingert/Freymann Dam

Plymouth County

461961LowNot 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.