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 1276–1300 of 3,759

All High Hazard Significant Hazard Low Hazard Poor Fair Satisfactory

Dam Name	Height (ft)	Year	Hazard	Condition
Pony Creek Watershed Site 26 Mills County	37	1963	Low	Not Rated
Pony Creek Watershed Site 24 Mills County	40	1964	Low	Not Rated
Pony Creek Watershed Site 23 Mills County	64	1964	Low	Not Rated
Pony Creek Watershed Site 22 Mills County	48	1963	Low	Not Rated
Pony Creek Watershed Site 20 Mills County	48	1965	Low	Not Rated
Pony Creek Watershed Site 17 Mills County	62	1965	Low	Satisfactory
Pony Creek Watershed Site 15 Mills County	48	1965	Low	Not Rated
Pony Creek Watershed Site 11 Mills County	53	1963	Low	Not Rated
Pontier Dam Warren County	26	1994	Low	Not Rated
Pollmiller Park Dam Lee County	31	1971	Low	Not Rated
Polk County Roadgrade Dam 5-80-22 Polk County	35	1996	Low	Not Rated
Polk County Roadgrade Dam 3-80-24 Polk County	49	1992	Low	Not Rated
Polk County Roadgrade Dam 21-78-22 Polk County	41	1992	Low	Not Rated
Plotz Dam Johnson County	28	1968	Low	Not Rated
Pleasant Valley Subwtrshd #2 Sta 50+00 Ida County	30	1963	Low	Not Rated
Pleasant Valley Subwtrshd #2a Sta 79+48 Ida County	33	1963	Low	Not Rated
Pleasant Valley Subwtrshd #1 Sta 53+70 Ida County	35	1963	Low	Not Rated
Pleasant Valley Subwtrshd #1j Sta 34+40 Ida County	24	1963	Low	Not Rated
Pleasant Valley Subwtrshd 1j-4550 Ida County	38	1963	Low	Not Rated
Pleasant Valley Subwtrshd #1c Sta 52+70 Ida County	28	1963	Low	Not Rated
Pleasant Valley Subwtrshd #1a Sta 139+4 Ida County	32	1963	Low	Not Rated
Pleasant Dam Clarke County	43	1969	Low	Not Rated
Plagge Dam Monona County	36	1998	Low	Not Rated
Pioneer Park Pond Dam Page County	25	1950	Low	Not Rated
Pilot Rock Subwtrshd Sta 45+48 #2 Cherokee County	33	1963	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.