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 37513759 of 3,759

Dam NameHeight (ft)YearHazardCondition
Zaugg Dam

Pocahontas County

421998LowPoor
Zellmer Subwatershed Site J-1a

Woodbury County

422002LowNot Rated
Zellmer Subwtrshd #B 22+50

Woodbury County

271964LowNot Rated
Zellmer Subwtrshd #M 106+26

Woodbury County

391964LowNot Rated
Zellmer Subwtrshd Sta 31+70 #M

Woodbury County

421964LowNot Rated
Zellmer Subwtrshd Sta 54+60 #B1

Woodbury County

301964LowNot Rated
Zellmer Subwtrshd Sta 60+50 #A

Woodbury County

241964LowNot Rated
Zenishek Dam

Johnson County

251979LowNot Rated
Zimmerman Dam

Warren County

271998LowNot 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.