Ohio Dams

1,377 dams tracked by the National Inventory of Dams

Total Dams

1,377

High Hazard

397

28.8%

Poor / Unsatisfactory

509

Average Age

65 yrs

Hazard Classification

High397 (28.8%)

Significant564 (41.0%)

Low339 (24.6%)

Condition Assessment

Satisfactory324 (23.5%)

Fair421 (30.6%)

Poor / Unsatisfactory509 (37.0%)

Not Rated123 (8.9%)

Federal

State

115

Local

356

Private

753

Tallest Dams

No. 2 Slurry Pond300 ft
The Ohio Valley Coal Slurry Disposal Dam275 ft
Cardinal Fly Ash No. 2 Dam250 ft
Cardinal Fly Ash No. 1 Dam242 ft
William H. Harsha Dam205 ft

High Hazard Dams

No. 2 Slurry PondHigh
The Ohio Valley Coal Slurry Disposal DamHigh
Cardinal Fly Ash No. 2 DamHigh
Cardinal Fly Ash No. 1 DamHigh
William H. Harsha DamHigh

Poor Condition Dams

All Dams in Ohio

Showing 551–575 of 1,377

All High Hazard Significant Hazard Low Hazard Poor Fair Satisfactory

Dam Name	Height (ft)	Year	Hazard	Condition
Indian Canoe Lake Dam Portage County	28	1958	Low	Poor
Indian Lake Dam Logan County	16	1852	High	Poor
Indian Lakes Rec. Area Lower Lake Dam Guernsey County	19	1962	High	Poor
Indian Lakes Rec. Area Upper Lake Dam Guernsey County	19	1962	Significant	Poor
Indian Trail Campground Lake Dam Huron County	26	1969	Low	Poor
International Animal Preserve Dam 9715-009 Muskingum County	38	1972	Low	Poor
International Animal Preserve Pond Dam Muskingum County	51	—	Significant	Poor
International Animal Preserve Pond Dam #10 Muskingum County	68	1976	High	Fair
International Animal Preserve Pond Dam #2 Muskingum County	50	1959	Significant	Poor
International Animal Preserve Pond Dam #35 Muskingum County	38	1975	Significant	Poor
International Animal Preserve Pond Dam #37 Muskingum County	13	1976	Low	Poor
International Animal Preserve Pond Dam #49 Muskingum County	22	—	Low	Poor
International Animal Preserve Pond Dam #55 Muskingum County	18	—	Undetermined	Not Rated
International Animal Preserve Pond Dam #65 Muskingum County	43	—	Significant	Poor
International Animal Preserve Pond Dam #7 Muskingum County	34	1961	Low	Poor
International Animal Preserve Pond Dam #8 Muskingum County	41	1962	Significant	Poor
International Animal Preserve Pond Dam #9 Muskingum County	24	1962	Low	Satisfactory
Iroquois Lake Dam Cuyahoga County	9	1960	Significant	Fair
Ismond Pond Dam Columbiana County	27	1957	Low	Fair
Izaak Walton Lake Dam Lawrence County	31	—	High	Poor
Jackson Lake Dam Jackson County	28	—	Significant	Poor
Jackson Lake Dam Jackson County	23	1939	High	Fair
Jack Towne Dam Guernsey County	16	1948	Low	Satisfactory
Jacobs Lake Dam Ashland County	26	1962	Significant	Poor
J.E. Annahannah Lake Dam Jackson County	26	1963	Low	Fair

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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.