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 13511375 of 4,124

Dam NameHeight (ft)YearHazardCondition
Prairie Trail Development - South Dam

Polk County

312008SignificantNot Rated
Prairie Trail Development - North Dam

Polk County

222008SignificantNot Rated
Prairie Trail - Cp5

Polk County

242014SignificantNot Rated
Prairie Rose Lake Dam

Shelby County

551960SignificantSatisfactory
Powers Dam

Mills County

411960LowNot Rated
Pottorff Dam

Adams County

261999LowNot Rated
Pottawattamie CO Roadgrade Dam 8-76-42

Pottawattamie County

431968LowNot Rated
Posten Dam

Page County

391975LowNot Rated
Possehl Dam

Monroe County

331989LowNot Rated
Porter Dam

Davis County

262002LowNot Rated
Porter Dam

Polk County

251955LowNot Rated
Pony Creek Watershed Site 9

Mills County

601967LowNot Rated
Pony Creek Watershed Site 8a

Mills County

621966LowNot Rated
Pony Creek Watershed Site 7

Mills County

301965LowNot Rated
Pony Creek Watershed Site 6u

Mills County

241965LowNot Rated
Pony Creek Watershed Site 34

Mills County

461963LowNot Rated
Pony Creek Watershed Site 31

Mills County

381963LowNot Rated
Pony Creek Watershed Site 30

Mills County

491964SignificantSatisfactory
Pony Creek Watershed Site 26

Mills County

371963LowNot Rated
Pony Creek Watershed Site 24

Mills County

401964LowNot Rated
Pony Creek Watershed Site 23

Mills County

641964LowNot Rated
Pony Creek Watershed Site 22

Mills County

481963LowNot Rated
Pony Creek Watershed Site 21

Mills County

751971HighSatisfactory
Pony Creek Watershed Site 20

Mills County

481965LowNot Rated
Pony Creek Watershed Site 17

Mills County

621965LowSatisfactory
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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.