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 726750 of 3,759

Dam NameHeight (ft)YearHazardCondition
Decorah Lower Milldam

Winneshiek County

271973LowNot Rated
Decorah Upper Milldam

Winneshiek County

81911LowNot Rated
Deemer Dam

Wayne County

281984LowNot Rated
Deere & Co. Dam

Black Hawk County

101981LowNot Rated
Deere & Co. Dam

Scott County

151980LowNot Rated
Deer Ridge Dam

Union County

341983LowNot Rated
De Geus Dam

Marion County

261999LowNot Rated
De Hart Dam

Van Buren County

251966LowNot Rated
De Heer Reclamation Dam

Marion County

312004LowNot Rated
Deiber & Shook Dam

Crawford County

311971LowNot Rated
Deitchler Dam

Mills County

352020LowNot Rated
Dejong Dam

Marion County

441963LowNot Rated
Delany Dam

Monroe County

281997LowNot Rated
De Louis Dam

Appanoose County

291992LowNot Rated
Delzell Dam

Davis County

212003LowNot Rated
Denison Country Club #3 Dam

Crawford County

321991LowNot Rated
Denman Dam

Dallas County

261977LowNot Rated
Dennis Koenig Dam

Winneshiek County

282013LowNot Rated
Dennis Smith Dam

Lucas County

252023LowNot Rated
Depenning Dam

Jasper County

281977LowNot Rated
Derby Dam

Davis County

262001LowNot Rated
Derry Dam

Taylor County

321983LowNot Rated
Deschamp Dam

Tama County

261975LowNot Rated
Des Moines-Center Street Milldam

Polk County

111916LowNot Rated
Des Moines County Roadgrade Dam 18-70-2

Des Moines County

841987LowNot 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.