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 2650 of 91

Dam NameHeight (ft)YearHazardCondition
Pony Creek Watershed Site 21

Mills County

751971HighSatisfactory
Pleasant Creek Lake Dam

Linn County

731977HighSatisfactory
Pikes Peak Flood Control Dam

Clayton County

491938HighSatisfactory
Parkview Lake Dam

Polk County

211978HighSatisfactory
Oaknoll Dam

Johnson County

251994HighFair
North Branch Ralston Creek Dam

Johnson County

371983HighSatisfactory
Monument Road Dam

Pottawattamie County

322011HighSatisfactory
Mill Picayune Watershed Site B-3

Harrison County

381962HighSatisfactory
Middle Pond Dam

Iowa County

271955HighPoor
Meyer Dam

Crawford County

451965HighFair
Maffitt Reservoir Dam

Dallas County

791944HighSatisfactory
Lost Grove Lake

Scott County

752012HighSatisfactory
Little River Watershed Site M-1

Decatur County

611984HighSatisfactory
Littlefield Lake Dam

Audubon County

451977HighSatisfactory
Leisure Lake Dam

Jackson County

581958HighFair
Lake Sugema Dam

Van Buren County

501992HighSatisfactory
Lake Ponderosa Dam

Poweshiek County

501969HighSatisfactory
Lake of The Hills Dam

Scott County

481972HighSatisfactory
Lake Cimarron

Poweshiek County

272012HighSatisfactory
Jefferson Park Watershed Site 5

Wapello County

431985HighSatisfactory
Jefferson Park Watershed Site 4

Wapello County

361978HighSatisfactory
Jefferson Park Watershed Site 3

Wapello County

421976HighSatisfactory
Jefferson Park Watershed Site 10

Wapello County

301983HighSatisfactory
Jefferson Park Watershed Site 1

Wapello County

361976HighSatisfactory
Indian Creek Watershed Site 2

Pottawattamie County

651975HighSatisfactory
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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.