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 851875 of 4,124

Dam NameHeight (ft)YearHazardCondition
Diamond Lake Watershed Site C-14

Poweshiek County

291972SignificantSatisfactory
Dickinson Dam

Washington County

291972LowNot Rated
Dickman Subwatershed Site 3-1

Woodbury County

381973LowNot Rated
Dickman Subwatershed Site M-2

Woodbury County

421973LowNot Rated
Dickman Subwatershed Site M-4

Woodbury County

341973LowNot Rated
Diede Dam

Woodbury County

271996LowNot Rated
Diede Dam

Plymouth County

271999LowNot Rated
Diehl Dam

Ringgold County

311991LowNot Rated
Diericky Pond Dam

Muscatine County

301987LowNot Rated
Diers Dam

Jefferson County

211969LowNot Rated
Dimick Dam

Jefferson County

291985LowNot Rated
Dimmitt Dam

Wapello County

201965LowNot Rated
Dingeman Dam

Marion County

271970LowNot Rated
Dittmer Dam

Warren County

301977LowNot Rated
Dittmer Dam

Warren County

321970LowNot Rated
Dixon Dam

Davis County

201959LowPoor
Dmacc Dam

Polk County

371984SignificantSatisfactory
Dnr Wetlands Dam

Boone County

101984LowNot Rated
Dog Creek Dam

O'Brien County

431967SignificantFair
Doherty Dam

Cherokee County

371998LowNot Rated
Doherty Dam

Cherokee County

371996LowNot Rated
Donney Dam

Webster County

321985LowNot Rated
Don Williams Lake Dam

Boone County

581965SignificantSatisfactory
Doran Dam

Boone County

631971LowNot Rated
Dorfler Dam

Crawford County

341971LowNot 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.