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 13261350 of 3,759

Dam NameHeight (ft)YearHazardCondition
Phillips Dam

Dubuque County

291999LowNot Rated
Phillips Dam

Clay County

241973LowNot Rated
Phillips Dam

Wapello County

321999LowNot Rated
Pfieffer Dam

Taylor County

301961LowNot Rated
Pfab Dam

Jackson County

321979LowNot Rated
Peterson Dam #2

Henry County

272005LowNot Rated
Peterson Dam

Henry County

181999LowNot Rated
Peterson Dam

Shelby County

191993LowNot Rated
Peterson Dam

Woodbury County

301966LowNot Rated
Peterson Dam

Monroe County

301965LowNot Rated
Peters/Fischer Dam

Pottawattamie County

371963LowNot Rated
Petersen Dam (Merle Petersen)

Guthrie County

292009LowNot Rated
Peters Dam

Ringgold County

311997LowNot Rated
Petchulat Dam

Johnson County

361993LowNot Rated
Perrin Dam

Adair County

211999LowNot Rated
Perkins Dam

Greene County

261968LowNot Rated
Perkins Dam

Mahaska County

291970LowNot Rated
Perkins Dam

Mahaska County

301958LowNot Rated
Perkey Dam

Marion County

231972LowNot Rated
Perion Subwatershed Site B-700

Ida County

221949LowNot Rated
Perion Subwatershed Site Aa-300

Ida County

291949LowNot Rated
Perion Subwatershed Site A-7500

Ida County

231949LowNot Rated
Perdue Dam

Pottawattamie County

281998LowNot Rated
Percival/Putnam Dam

Story County

261962LowNot Rated
Penrose Dam

Jackson County

281989LowNot 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.