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 14511475 of 3,759

Dam NameHeight (ft)YearHazardCondition
Nora Springs Low Head Dam

Floyd County

121895LowNot Rated
Noel Dam

Appanoose County

91998LowNot Rated
Noelck Dam

Franklin County

282004LowNot Rated
Nilan Dam

Pottawattamie County

301962LowNot Rated
Nikkel Dam

Poweshiek County

271976LowNot Rated
Nikkel Dam

Poweshiek County

291990LowNot Rated
Niebuhr Dam

Monroe County

332000LowNot Rated
Nicholson Dam

Taylor County

301991LowNot Rated
Nichols Dam

Warren County

281992LowNot Rated
Nichols Dam

Adair County

231974LowNot Rated
Nice/Crumly Dam

Muscatine County

351969LowNot Rated
Niacc Dam

Cerro Gordo County

241973LowNot Rated
Newton Dam

Adair County

201959LowNot Rated
Newton Dam

Adair County

221974LowNot Rated
Newquist Grade Stabilization Structure

Wapello County

272011LowNot Rated
New London Country Club Dam

Henry County

261910LowSatisfactory
Newby Dam

Hardin County

271965LowNot Rated
Neva Anderson Trust Dam

Montgomery County

332021LowNot Rated
Neustrom Subwatershed Site M-6

Woodbury County

331971LowNot Rated
Neustrom Subwatershed Site M-5

Woodbury County

391971LowNot Rated
Neustrom Subwatershed Site M-4

Woodbury County

481971LowNot Rated
Neustrom Subwatershed Site M-3

Woodbury County

251971LowNot Rated
Neustrom Subwatershed Site M-1

Woodbury County

301971LowNot Rated
Neustrom Subwatershed Site 9-3

Woodbury County

501971LowNot Rated
Neustrom Subwatershed Site 19-3

Woodbury County

401973LowNot 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.