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 3,759

Dam NameHeight (ft)YearHazardCondition
Penick Dam

Lucas County

361997LowNot Rated
Pender Dam

Madison County

251964LowNot Rated
Pence Dam

Jones County

171971LowNot Rated
Pemble Dam

Greene County

352001LowNot Rated
Pearson Dam

Henry County

272006LowNot Rated
Paulson Dam

Muscatine County

271982LowNot Rated
Paulson Dam

Mills County

401977LowNot Rated
Paulsen Dam

Audubon County

301975LowNot Rated
Paul Graves Dam

Clarke County

282014LowNot Rated
Patz Dam

Webster County

361978LowNot Rated
Pattison Dam

Clayton County

682008LowSatisfactory
Patterson Dam

Clarke County

261994LowNot Rated
Patterson Dam

Clarke County

322018LowNot Rated
Parsons Dam

Linn County

292004LowNot Rated
Parson Pond Dam

Louisa County

301989LowNot Rated
Parnell Creek Subwatershed Site M-8

Woodbury County

241968LowNot Rated
Parnell Creek Subwatershed Site M-6

Woodbury County

301968LowNot Rated
Parnell Creek Subwatershed Site M-5

Woodbury County

371967LowNot Rated
Parnell Creek Subwatershed Site M-4

Woodbury County

261967LowNot Rated
Parnell Creek Subwatershed Site M-3

Woodbury County

421967LowNot Rated
Parnell Creek Subwatershed Site 9-1

Woodbury County

441968LowNot Rated
Parnell Creek Subwatershed Site 8-2

Woodbury County

491969LowNot Rated
Parnell Creek Subwatershed Site 8-1

Woodbury County

541968LowNot Rated
Parnell Creek Subwatershed Site 5-1

Woodbury County

361969LowNot Rated
Parnell Creek Subwatershed Site 21-2

Woodbury County

311967LowNot 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.