Tallest Dams in Ohio

Ohio has 1377 dams with recorded heights. The tallest is No. 2 Slurry Pond at 300 feet. Taller dams impound more water and carry greater potential energy, which is why height is a key factor in hazard classification and inspection requirements.

#	Dam	County	Height (ft)	Type	Purpose	Hazard	Year
1	No. 2 Slurry Pond	Belmont	300	Earth	Water Supply	High
2	The Ohio Valley Coal Slurry Disposal Dam	Belmont	275	Earth	Tailings	High	1981
3	Cardinal Fly Ash No. 2 Dam	Jefferson	250	Earth	Tailings	High	2014
4	Cardinal Fly Ash No. 1 Dam	Jefferson	242	Earth	Tailings	High	1974
5	William H. Harsha Dam	Clermont	205	Rockfill	Flood Risk Reduction	High	1973
6	Caesar Creek Dam - Saddle Dike 2	Warren	180	Rockfill	Flood Risk Reduction	High	1976
7	Muskingum River Upper Fly Ash Dam	Washington	152	Earth	Tailings	High	1975
8	Marge Schott Lake Dam	Clermont	140	Earth	Recreation	High	2000
9	Meigs Mine No. 1 Slurry Impoundment	Meigs	131	Other	Tailings	High
10	Sands Hill Slurry Impoundment Dam	Vinton	131	Rockfill	Tailings	High	1992
11	Englewood Dam	Montgomery	121	Earth	Flood Risk Reduction	High	1922
12	Eramet Waste Retention Dam	Washington	118	Earth	Tailings	High	1982
13	Mohawk Dam	Coshocton	111	Rockfill	Flood Risk Reduction	High	1937
14	Germantown Dam	Montgomery	107	Earth	Flood Risk Reduction	High	1922
15	West Fork Of Mill Creek Dam	Hamilton	106	Earth	Flood Risk Reduction	High	1952
16	Refuse Imp. (sands Hill Reservoir)	Vinton	100	Earth	Tailings	High
17	Muskingum River Middle Fly Ash Dam	Washington	100	Earth	Tailings	High	1968
18	Clarence J. Brown Dam	Clark	98	Earth	Flood Risk Reduction	High	1973
19	Berlin Dam	Mahoning	96	Gravity	Flood Risk Reduction	High	1943
20	Friendship Park Lake Dam	Jefferson	94	Earth	Recreation	High	1972
21	Alum Creek Dam	Delaware	93	Gravity	Flood Risk Reduction	High	1974
22	Stingy Run Fly Ash Dam	Gallia	93	Earth	Tailings	High	1974
23	Apple Valley Lake Dam	Knox	91	Earth	Recreation	High	1971
24	Shaker Run Dam	Warren	90	Earth	Recreation	High	1973
25	Lakeview Cemetery Flood Control Dam	Cuyahoga	89	Concrete	Flood Risk Reduction	High	1978
26	Wills Creek Dam	Coshocton	87	Earth	Flood Risk Reduction	High	1936
27	Hoover Dam	Franklin	86	Earth	Water Supply	High	1956
28	Killen Station Ash Disposal Dike	Adams	84	Earth	Tailings	High	1982
29	Tom Jenkins Dam	Athens	84	Earth	Flood Risk Reduction	High	1950
30	Michael J. Kirwan Dam	Portage	83	Earth	Flood Risk Reduction	High	1966
31	O'shaughnessy	Delaware	79	Gravity	Water Supply	High	1924
32	Taylorsville Dam	Montgomery	78	Earth	Flood Risk Reduction	High	1922
33	Lockington Dam	Shelby	78	Earth	Flood Risk Reduction	High	1922
34	Barnesville Reservoir No. 3 Dam	Belmont	77	Earth	Water Supply	High	1965
35	Mckelvey Lake Dam	Mahoning	77	Concrete	Water Supply	High	1926
36	Hunters Run Structure No. 9	Fairfield	76	Earth	Flood Risk Reduction	High	1959
37	Wolf Run Lake Dam	Noble	76	Earth	Flood Risk Reduction	High	1966
38	Caldwell Lake Dam	Noble	75	Earth	Flood Risk Reduction	High	1969
39	Muskingum River Lower Fly Ash Dam	Washington	75	Earth	Tailings	High	1968
40	Leesville Dam	Carroll	74	Earth	Flood Risk Reduction	High	1937
41	Rocky Fork Lake Dam	Highland	74	Concrete	Recreation	High	1952
42	Lake Lakengren Dam	Preble	74	Earth	Recreation	High	1970
43	Huffman Dam	Greene	73	Earth	Flood Risk Reduction	High	1922
44	Georgetown Plant Freshwater Dam	Harrison	73	Earth	Water Supply	High	1949
45	North Branch Kokosing Dam	Knox	71	Earth	Flood Risk Reduction	High	1972
46	Paint Creek Dam - Dike	Highland	70	Earth		High	1973
47	Lake Hamilton Dam	Mahoning	70	Concrete	Recreation	High	1905
48	Timbre Ridge Dam	Lawrence	69	Earth	Other	High	1974
49	Lake Litchfield Dam	Summit	69	Earth	Recreation	High	1975
50	Chateau Lakes No. 1 Dam	Hamilton	68	Earth	Recreation	High	1975

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