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 876900 of 4,124

Dam NameHeight (ft)YearHazardCondition
Sponsler Dam

Wayne County

201961LowNot Rated
Split Rock Dam

Chickasaw County

251964LowNot Rated
Spillers Dam

Dallas County

281962LowNot Rated
Spencer Dam

Pottawattamie County

331966LowNot Rated
Spencer Dam

Harrison County

472007LowNot Rated
Spence Dam

Warren County

322003LowNot Rated
Speck Dam

Mills County

342004LowNot Rated
Sparks Dam

Woodbury County

231964LowNot Rated
Southwest Iowa Egg Cooperative Dam

Cass County

381999LowNot Rated
Southridge Road Detention Basin

Marshall County

181996SignificantSatisfactory
South Ridge Estates - West Dam

Sioux County

82007SignificantNot Rated
South Ridge Estates - South Dam

Sioux County

112007SignificantNot Rated
South Ridge Estates - East Dam

Sioux County

172007HighSatisfactory
Southpoint Wetland Mitigation Dam

Polk County

152004LowSatisfactory
South Magnolia Watershed Site Z

Harrison County

441958LowNot Rated
South Magnolia Watershed Site 5

Harrison County

371958LowNot Rated
South Magnolia Watershed Site 4

Harrison County

341958LowNot Rated
South Magnolia Watershed Site 3

Harrison County

281958LowNot Rated
South Magnolia Watershed Site 1

Harrison County

571958LowNot Rated
South Lake Dam

Linn County

281993LowNot Rated
South Hungerford 2 Watershed Site 9

Plymouth County

251976LowNot Rated
South Hungerford 2 Watershed Site 8

Plymouth County

261976LowNot Rated
South Hungerford 2 Watershed Site 5

Plymouth County

281967LowNot Rated
South Hungerford 2 Watershed Site 4

Plymouth County

271965LowNot Rated
South Hungerford 2 Watershed Site 11

Plymouth County

401964LowNot 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.