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 24512475 of 3,759

Dam NameHeight (ft)YearHazardCondition
Henry Dam

Plymouth County

191991LowNot Rated
Henry Dam

Crawford County

341960LowNot Rated
Henningsgaard Dam

Winneshiek County

302002LowNot Rated
Henke Dam

Cherokee County

281995LowNot Rated
Hendricks Dam

Lee County

291974LowNot Rated
Henco Dam

Union County

281982LowNot Rated
Hempys Lake Dam

Tama County

321963LowNot Rated
Helmers Dam

Osceola County

301974LowNot Rated
Heller Dam

Iowa County

261977LowNot Rated
Held Watershed Site D-7

Plymouth County

421978LowNot Rated
Held Watershed Site D-4

Plymouth County

331978LowNot Rated
Held Watershed Site D-1

Plymouth County

401979LowNot Rated
Held Watershed Site B-6

Plymouth County

441965LowNot Rated
Held Watershed Site B-5

Plymouth County

241965LowNot Rated
Held Watershed Site B-3

Plymouth County

431965LowNot Rated
Held Watershed Site B-2

Plymouth County

431965LowNot Rated
Held Watershed Site B-1

Plymouth County

261965LowNot Rated
Held Watershed Site A-3

Plymouth County

381965LowNot Rated
Held Watershed Site A-2

Plymouth County

461965LowNot Rated
Held Watershed Site A-1

Plymouth County

541965LowNot Rated
Heistand/Swain Dam

Harrison County

261968LowNot Rated
Heistand/Erlewine Dam

Harrison County

311968LowNot Rated
Heisler Subwatershed Site 2-1

Woodbury County

402004LowNot Rated
Heisler Creek Subwtrshd Sta 8+80 #3f-2

Woodbury County

251960LowNot Rated
Heisler Creek Subwtrshd Sta 46+80 #3d

Woodbury County

341960LowNot Rated
PreviousPage 99 of 151Next

Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.