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 13011325 of 3,759

Dam NameHeight (ft)YearHazardCondition
Heller Dam

Iowa County

261977LowNot Rated
Helmers Dam

Osceola County

301974LowNot Rated
Hempys Lake Dam

Tama County

321963LowNot Rated
Henco Dam

Union County

281982LowNot Rated
Hendricks Dam

Lee County

291974LowNot Rated
Henke Dam

Cherokee County

281995LowNot Rated
Henningsgaard Dam

Winneshiek County

302002LowNot Rated
Henry Dam

Pottawattamie County

271990LowNot Rated
Henry Dam

Plymouth County

191991LowNot Rated
Henry Dam

Crawford County

341960LowNot Rated
Henter Dam

Madison County

391998LowNot Rated
Herberger Dam

Warren County

371975LowNot Rated
Herbold Dam

Woodbury County

281995LowNot Rated
Herman Farms Dam

Wapello County

261998LowNot Rated
Herring Dam

Lucas County

281987LowNot Rated
Hertitage Hills Dam

Louisa County

261995LowNot Rated
Hertz Dam

Story County

321959LowNot Rated
Herzberg Dam

Taylor County

272020LowNot Rated
Hess Dam

Guthrie County

211967LowNot Rated
Hess Dam

Dubuque County

261970LowNot Rated
Hess Dam #2

Guthrie County

221969LowNot Rated
Heston Dam

Appanoose County

261999LowNot Rated
Heston/Johnson Dam

Lucas County

311978LowNot Rated
Hiatt Dam

Union County

221968LowNot Rated
Hickenbottom Dam

Van Buren County

261959LowNot 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.