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 3276–3300 of 3,759

All High Hazard Significant Hazard Low Hazard Poor Fair Satisfactory

Dam Name	Height (ft)	Year	Hazard	Condition
U-B Subwatershed Site 2c-1 Monona County	34	1962	Low	Not Rated
Uhl Dam Woodbury County	38	1969	Low	Not Rated
Union County Roadgrade Dam 29-73-29 Union County	39	1993	Low	Not Rated
Union Grove Silt Containment Dam Tama County	17	1990	Low	Not Rated
Union Hill Wpa Dam Cerro Gordo County	8	1997	Low	Not Rated
Upland Investments Dam Fremont County	23	2021	Low	Not Rated
Upper Beaver Subwatershed Site 15-1 Monona County	54	1966	Low	Not Rated
Upper Beaver Subwatershed Site 20-1 Monona County	51	1967	Low	Not Rated
Upper Beaver Subwatershed Site 4-1 Monona County	49	1968	Low	Not Rated
Upper Beaver Subwatershed Site 50-1 Monona County	49	1968	Low	Not Rated
Upper Beaver Subwatershed Site 51-1 Monona County	36	1968	Low	Not Rated
Upper Beaver Subwatershed Site 6-1 Monona County	64	1967	Low	Not Rated
Upper Beaver Subwatershed Site M-1 Monona County	60	1967	Low	Poor
Upper Beaver Subwatershed Site M-2 Monona County	43	1967	Low	Not Rated
Upper Locust Creek Watershed Site L-19 Wayne County	28	1995	Low	Not Rated
Upper Locust Creek Watershed Site L-23 Wayne County	22	1995	Low	Not Rated
Upper Locust Creek Watershed Site L-25 Wayne County	28	1995	Low	Not Rated
Upper Locust Creek Watershed Site L-32 Wayne County	22	2007	Low	Not Rated
Upper Locust Creek Watershed Site L-33 Wayne County	23	1995	Low	Not Rated
Upper Locust Creek Watershed Site L-35 Wayne County	26	1995	Low	Not Rated
Upper Locust Creek Watershed Site L-40 Wayne County	23	2007	Low	Not Rated
Upper Locust Creek Watershed Site L-41 Wayne County	24	2007	Low	Not Rated
Upper Locust Creek Watershed Site L-46 Wayne County	22	2008	Low	Not Rated
Upper Locust Watershed Site L-14 Wayne County	30	1999	Low	Not Rated
Upper Locust Watershed Site L-30 Wayne County	31	1999	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.