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 25762600 of 3,759

Dam NameHeight (ft)YearHazardCondition
Riemer Dam

Marion County

251965LowNot Rated
Riggleman Dam

Crawford County

281967LowNot Rated
Riggleman Dam

Crawford County

321998LowNot Rated
Riordan Dam

Monroe County

221967LowNot Rated
Ripperger Dam

Union County

271986LowNot Rated
Ripperger Dam

Warren County

271989LowNot Rated
Ripperger Dam

Union County

321983LowNot Rated
Ripperger Dam

Lucas County

82001LowNot Rated
R&J Investment Dam

Davis County

321992LowNot Rated
R&L/Mclaughlin Dam

Cerro Gordo County

152011LowNot Rated
Robbins Dam

Dallas County

331967LowNot Rated
Robert Phillips Dam

Lucas County

232017LowNot Rated
Robert Smith Dam

Page County

262022LowNot Rated
Robeson Subwatershed Gully 3 Sta92+50

Cherokee County

451955LowNot Rated
Robeson Subwatershed Site 3055

Cherokee County

311955LowNot Rated
Robeson Subwatershed Site 4400

Cherokee County

401955LowNot Rated
Robinette Dam

Montgomery County

322013LowNot Rated
Robinson Dam

Van Buren County

342001LowNot Rated
Robinson Dam

Mahaska County

271997LowNot Rated
Robinson Dam

Montgomery County

292021LowNot Rated
Robison Dam

Taylor County

322007LowNot Rated
Robson Dam

Greene County

251960LowNot Rated
Rock Rapids Milldam

Lyon County

71931LowNot Rated
Rocky Branch Creek, Site Mike Taylor Dam

Madison County

342016LowNot Rated
Rocky Branch Creek Watershed Site 4

Jefferson County

251962LowNot 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.