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 25012525 of 3,759

Dam NameHeight (ft)YearHazardCondition
Harmony Creek Watershed Site 7

Harrison County

401958LowNot Rated
Harmony Creek Watershed Site 6

Harrison County

451958LowNot Rated
Harmony Creek Watershed Site 5

Harrison County

231958LowNot Rated
Harmony Creek Watershed Site 4

Harrison County

461958LowNot Rated
Harmony Creek Watershed Site 1

Harrison County

431958LowNot Rated
Harmon Farms Dam

Taylor County

341996LowNot Rated
Harkrader Dam

Dallas County

381969LowNot Rated
Hardin Dam

Lee County

322000LowNot Rated
Hardin Dam

Taylor County

241982LowNot Rated
Hardin County Wetland Dam

Hardin County

111993LowNot Rated
Hardebeck Dam

Taylor County

252004LowNot Rated
Harban Dam

Warren County

341995LowNot Rated
Hanthorn Dam

Decatur County

271991LowNot Rated
Hanson Dam

Clayton County

292004LowNot Rated
Hansen Farms Dam

Ringgold County

302001LowNot Rated
Hansen Dam

Story County

251975LowNot Rated
Hansell Farms Dam

Decatur County

231991LowNot Rated
Hanna Dam

Adams County

211994LowNot Rated
Hanlontown Slough Site 3

Worth County

82000LowNot Rated
Hanlontown Slough Dam 1.1

Worth County

112001LowNot Rated
Hankins Dam

Mahaska County

201967LowNot Rated
Hanke Dam

Jasper County

261972LowNot Rated
Hanigan Dam

Monona County

442001LowNot Rated
Hang Dam

Taylor County

191969LowNot Rated
Hamm/Knutsen Dam

Wayne County

171962LowNot 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.