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 25762600 of 3,759

Dam NameHeight (ft)YearHazardCondition
Greenfield Dam

Jefferson County

351998LowNot Rated
Greene Mill Dam

Butler County

111925LowSatisfactory
Greene County Wetland Dam #1

Greene County

92006LowNot Rated
Greene County Roadgrade Dam 28-85-32

Greene County

301986LowNot Rated
Greene County Dam

Greene County

341984LowNot Rated
Green Dam

Clarke County

251972LowNot Rated
Green Dam

Polk County

301961LowNot Rated
Greencrest Farms Dam

Adair County

371976LowNot Rated
Greenberg Dam

Ringgold County

221997LowNot Rated
Greenbelt Wetland Dam

Lucas County

71994LowNot Rated
Green Acres Dam

Audubon County

251969LowNot Rated
Green Acres Dam

Lee County

261971LowNot Rated
Gray Dam

Page County

302021LowNot Rated
Gray Dam

Tama County

251946LowNot Rated
Gray Dam

Montgomery County

391989LowNot Rated
Gray Dam

Tama County

271964LowNot Rated
Grau Dam

Crawford County

341945LowNot Rated
Grap Dam

Harrison County

292011LowNot Rated
Granfield/Westrum Dam

Union County

281977LowNot Rated
Grand River Cattle Dam

Decatur County

412007LowNot Rated
Grand Meadow Subwatershed Site M-2

Cherokee County

241966LowNot Rated
Grand Meadow Subwatershed Site M-1

Cherokee County

211966LowNot Rated
Grand Meadow Subwatershed Site 8-3

Cherokee County

201966LowNot Rated
Granaman Dam

Wapello County

232015LowNot Rated
Graham Dam

Warren County

251968LowNot 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.