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 18261850 of 4,124

Dam NameHeight (ft)YearHazardCondition
Mill Picayune Watershed Site B-3

Harrison County

381962HighSatisfactory
Mill Picayune Watershed Site A-2

Harrison County

311966LowNot Rated
Mill Picayune Watershed Site 13-1

Shelby County

471975LowNot Rated
Milligan Dam

Union County

251973LowNot Rated
Miller Subwatershed Site 4-3375

Woodbury County

321959LowNot Rated
Miller Subwatershed 3-A-1500

Woodbury County

341960LowNot Rated
Miller Subwatershed 3-2975

Woodbury County

331960LowNot Rated
Miller & Stender Dam

Crawford County

351969LowNot Rated
Miller-Main Dam

Union County

271990LowNot Rated
Miller Dam

Page County

291966LowNot Rated
Miller Dam

Davis County

281996LowNot Rated
Miller Dam

Crawford County

301944LowNot Rated
Miller Dam

Dallas County

281992LowNot Rated
Miller Dam

Fremont County

451961LowNot Rated
Miller Dam

Appanoose County

251977LowNot Rated
Miller Dam

Jefferson County

201963LowNot Rated
Miller Dam

Iowa County

391999LowNot Rated
Miller Dam

Johnson County

291971LowNot Rated
Millenkamp Dam

Delaware County

271999LowNot Rated
Mill Creek Lake Dam

O'Brien County

291934LowSatisfactory
Millard Dam

Davis County

332002LowNot Rated
Miksch Dam

Washington County

272023LowNot Rated
Mike Mikkelson Subwatershed M-5905

Monona County

241960LowNot Rated
Mike Mikkelson Subwatershed M-2395

Monona County

271960LowNot Rated
Mike Mikkelson Subwatershed M-10210

Monona County

251960LowNot 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.