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 15261550 of 3,759

Dam NameHeight (ft)YearHazardCondition
Iowa Noname96

Wayne County

331980LowNot Rated
Iowa Noname97

Johnson County

311991LowNot Rated
Iowa Select Farms Dam

Union County

401997LowNot Rated
Iris Lake Dam

Fayette County

662004LowSatisfactory
Israel Dam

Taylor County

291981LowNot Rated
Isu Dam

Lucas County

241958LowNot Rated
Isu Dam

Story County

371958LowNot Rated
Jackson Dam

Montgomery County

342022LowNot Rated
Jackson Dam

Wayne County

431994LowNot Rated
Jacobson Dam

Crawford County

361963LowNot Rated
Jaeschke Dam

Clarke County

331976LowNot Rated
Jalas Dam

O'Brien County

341965LowNot Rated
James Dam

Warren County

301979LowNot Rated
James King Wetland Dam

Muscatine County

111999LowNot Rated
James Russmann Dam

Pottawattamie County

242016LowNot Rated
Jandik Dam

Warren County

372000LowNot Rated
Jansen Dam

Jasper County

242006LowNot Rated
Jansma Dam

Lyon County

221970LowNot Rated
Jar Farms

Montgomery County

372001LowNot Rated
Jarrett Dam

Des Moines County

352023LowNot Rated
Jasper County Dam 26-80-17

Jasper County

291997LowNot Rated
Jasper County Roadgrade Dam 15-81-20

Jasper County

382005LowNot Rated
Jasper County Roadgrade Dam 20-81-20

Jasper County

392002LowNot Rated
Jasper County Roadgrade Dam 35-81-17

Jasper County

282001LowNot Rated
Jass Dam

Decatur County

261979LowNot 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.