Iowa Dams

4,124 dams tracked by the National Inventory of Dams

Total Dams

4,124

High Hazard

2.2%

Poor / Unsatisfactory

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

State

141

Local

1,938

Private

2,014

Tallest Dams

High Hazard Dams

Poor Condition Dams

All Dams in Iowa

Showing 926–950 of 4,124

All High Hazard Significant Hazard Low Hazard Poor Fair Satisfactory

Dam Name	Height (ft)	Year	Hazard	Condition
East Aldrich Subwatershed M-3608.2 Ida County	33	1954	Low	Not Rated
Easter Lake Dam Polk County	43	1967	Significant	Satisfactory
Easter Lake Retention Basin #1 Polk County	18	2005	Significant	Satisfactory
Easter Lake Retention Basin # 10 Polk County	22	2005	Significant	Satisfactory
Easter Lake Stormwater Retention Basin - Site 9 Polk County	24	2005	High	Satisfactory
East Fork Big Cr Watershed Site E-10 Decatur County	17	1990	Low	Not Rated
East Fork Big Cr Watershed Site E-12 Decatur County	23	1992	Low	Not Rated
East Fork Big Cr Watershed Site E-14 Decatur County	22	1990	Low	Not Rated
East Fork Big Cr Watershed Site E-15 Decatur County	19	1990	Low	Not Rated
East Fork Big Cr Watershed Site E-16 Decatur County	18	1992	Low	Not Rated
East Fork Big Cr Watershed Site E-17 Decatur County	23	1995	Low	Not Rated
East Fork Big Cr Watershed Site E-18 Decatur County	23	1990	Low	Not Rated
East Fork Big Cr Watershed Site E-2 Decatur County	18	1990	Low	Not Rated
East Fork Big Cr Watershed Site E-3 Decatur County	18	1995	Low	Not Rated
East Fork Big Cr Watershed Site E-4 Decatur County	16	1990	Low	Not Rated
East Fork Big Cr Watershed Site E-5 Decatur County	14	1990	Low	Not Rated
East Fork Big Cr Watershed Site E-6 Decatur County	24	1995	Low	Not Rated
East Fork Big Cr Watershed Site Z-1 Decatur County	20	1990	Low	Not Rated
East Fork Big Cr Watershed Site Z-2 Decatur County	21	1990	Low	Not Rated
East Fork Big Cr Watershed Site Z-4 Decatur County	20	1995	Low	Not Rated
East Fork Big Cr Watershed Site Z-5-1 Decatur County	27	1995	Low	Not Rated
East Fork Big Cr Watershed Site Z-6 Decatur County	20	1990	Low	Not Rated
East Fork Big Cr Wtrshd Site Z-5-2 Decatur County	23	2003	Low	Not Rated
East Fork Big Cr Wtrshd Site Z-6 Decatur County	18	2003	Low	Not Rated
East Fork Grand River Site B-61 Ringgold County	33	2010	Low	Not 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.