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 376–397 of 397

All High Hazard Significant Hazard Low Hazard Poor Fair Satisfactory

Dam Name	Height (ft)	Year	Hazard	Condition
Wellington Upground Reservoir Lorain County	35	1972	High	Fair
Wellston Reservoir Dam Jackson County	41	1920	High	Poor
Westerville Reservoir Dam Delaware County	47	1960	High	Satisfactory
West Fork of Mill Creek Dam Hamilton County	106	1952	High	Not Available
West Reservoir Dam Summit County	22	1840	High	Satisfactory
White Turkey Lake Dam Ross County	42	1968	High	Fair
Willard City Upground Reservoir Huron County	65	1971	High	Fair
William H. Harsha Dam Clermont County	205	1973	High	Not Available
Williams Reservoir Allen County	53	2012	High	Satisfactory
Willoway Upground No. 5 Dam Lorain County	12	1999	High	Satisfactory
Willowbrook Lake Dam Clermont County	23	1975	High	Fair
Wills Creek Dam Coshocton County	87	1936	High	Not Available
Wilmington Upground Reservoir No. 1 Clinton County	19	1945	High	Satisfactory
Wilmington Upground Reservoir No. 2 Clinton County	31	1963	High	Satisfactory
Wolf Creek Dam Summit County	43	1926	High	Poor
Wolfden Lake Dam Scioto County	27	1936	High	Fair
Wolf Run Lake Dam Noble County	76	1966	High	Satisfactory
Woodsfield Reservoir Dam No. 3 Monroe County	56	1992	High	Poor
Wright Farm West Detention Basin Dam Hamilton County	26	1996	High	Satisfactory
Youngstown Upground Reservoir Mahoning County	29	1929	High	Fair
Zanesville State Nursery Lake Dam Muskingum County	32	—	High	Fair
Zimber Ditch Detention Basin B Summit County	17	2007	High	Satisfactory

PreviousPage 16 of 16

Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.