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 13761400 of 3,759

Dam NameHeight (ft)YearHazardCondition
Parnell Creek Subwatershed Site 21-1

Woodbury County

341967LowNot Rated
Parnell Creek Subwatershed Site 20-2

Woodbury County

331967LowNot Rated
Parnell Creek Subwatershed Site 17-1

Woodbury County

261967LowNot Rated
Parnell Creek Subwatershed Site 15-2

Woodbury County

351967LowNot Rated
Parnell Creek Subwatershed Site 15-1

Woodbury County

431967LowNot Rated
Parmer Dam

Clarke County

281995LowNot Rated
Panorama Silt Dam Site 2

Guthrie County

351988LowNot Rated
Paluska Dam

Davis County

352016LowNot Rated
Palisades-Kepler Dam

Linn County

81936LowNot Rated
Pacha Dam

Jefferson County

321975LowNot Rated
Oxford Mill Dam

Jones County

91927LowNot Rated
Owens Dam

Jasper County

331980LowNot Rated
Owen Dam

Washington County

211966LowNot Rated
Owen Dam

Polk County

281960LowNot Rated
Owega, Wsc8 Dam

Woodbury County

92004LowNot Rated
Overmeyer Dam

Adair County

301959LowNot Rated
Ottumwa

Wapello County

161960LowSatisfactory
Ottilie Dam

Marshall County

221959LowNot Rated
Otte Dam

Lee County

311979LowNot Rated
Otranto Dam

Mitchell County

71902LowNot Rated
Oswald Dam

Clarke County

322004LowNot Rated
Ory Dam

Dallas County

301998LowNot Rated
Olson/Mann Dam

Monona County

521959LowNot Rated
Olson Dam

Decatur County

251964LowNot Rated
Olson Dam

Cerro Gordo County

211972LowNot 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.