High Risk Dams in Ohio

Ohio has 132 high hazard dams with a condition assessment of poor or unsatisfactory. These are dams where failure would probably cause loss of human life and where recognized safety deficiencies have been identified.

Of the 397 high hazard dams in Ohio, 132 (33%) have concerning condition ratings — 128 rated poor and 4 rated unsatisfactory.

Dam	County	Height (ft)	Condition	Purpose	Year
Apple Valley Lake Dam	Knox	91	Poor	Recreation	1971
Barnesville Reservoir No. 3 Dam	Belmont	77	Poor	Water Supply	1965
Lake Lakengren Dam	Preble	74	Poor	Recreation	1970
Rocky Fork Lake Dam	Highland	74	Poor	Recreation	1952
Lake Hamilton Dam	Mahoning	70	Poor	Recreation	1905
Belmont Lake Dam	Belmont	67	Poor	Recreation	1961
Hargus Lake Dam	Pickaway	66	Poor	Recreation	1956
Old Man's Cave Lake Dam	Hocking	64	Poor	Water Supply	1972
Cowan Lake Dam	Clinton	63	Poor	Recreation	1947
Galley Hill Lake Dam	Clermont	63	Poor	Recreation	1960
Lake Tomahawk Dam	Columbiana	62	Poor	Recreation	1966
Mineral Ridge Dam	Trumbull	60	Poor	Water Supply	1932
Hammertown Lake Dam	Jackson	60	Poor	Water Supply	1954
Gorge Plant Dam	Summit	57	Poor	Water Supply	1912
Woodsfield Reservoir Dam No. 3	Monroe	56	Poor	Water Supply	1992
Forked Run Lake Dam	Meigs	56	Poor	Recreation	1952
Jisco Lake Dam	Jackson	56	Poor	Recreation	1952
Upper Girard Lake Dam	Trumbull	55	Poor	Water Supply	1929
Turkey Creek Lake Dam	Scioto	54	Poor	Recreation	1966
Glass Rock Lake Dam	Perry	54	Poor	Recreation
Lake Milton Dam	Mahoning	53	Poor	Recreation	1916
Briarwood Sportsman's Club No. 11 Dam	Logan	50	Poor	Recreation	1976
Varkony Pond Dam	Harrison	49	Poor	Recreation
Ross Lake Dam	Ross	48	Poor	Recreation	1967
Barnesville Reservoir No. 2 Dam	Belmont	48	Poor	Water Supply	1936
Salem Reservoir (south Embankment)	Columbiana	48	Poor	Water Supply	1952
Lake Viering Dam	Knox	47	Poor	Recreation	1964
New Lexington Reservoir Dam	Perry	45	Poor	Water Supply	1936
Roaming Rock Shores Lake Dam	Ashtabula	45	Poor	Recreation	1967
Highlandtown Lake Dam	Columbiana	44	Poor	Recreation	1966
Nimisila Reservoir Dam	Summit	44	Poor	Water Supply	1936
Clear Fork Reservoir Dam	Richland	44	Poor	Water Supply	1949
Wolf Creek Dam	Summit	43	Poor	Water Supply	1926
Lilley Lake Dam	Warren	43	Poor	Recreation	1954
Lake Logan Dam	Hocking	43	Poor	Recreation	1954
Lake Mohawk Dam	Carroll	42	Poor	Recreation	1963
Lake Choctaw Dam	Madison	42	Poor	Recreation	1964
Margaret Creek Structure No. 6	Athens	42	Poor	Flood Risk Reduction	1967
Wellston Reservoir Dam	Jackson	41	Poor	Water Supply	1920
Amick Upground Reservoir	Morrow	40	Poor	Water Supply	1968
Paradise Lakes - South Lake Dam	Preble	40	Poor	Recreation	1946
Lake Rupert Dam	Vinton	40	Poor	Water Supply	1968
Hinckley Lake Dam	Medina	40	Poor	Recreation	1928
Bridge Creek Dam	Geauga	40	Poor	Water Supply	1961
Seven Springs Lake Dam	Medina	40	Poor	Recreation	1961
Stevens Lake Dam	Harrison	39	Poor	Recreation	1963
Lost Creek Upground Reservoir	Allen	38	Poor	Water Supply	1917
Southern Silica Pond No. 2 Dam	Ross	38	Poor	Recreation	1956
Dale Walborn Reservoir Dam	Stark	37	Poor	Water Supply	1971
Sally Buffalo Park Lake Dam	Harrison	37	Poor	Recreation	1953
Forest Hill Park Dam No. 2	Cuyahoga	37	Poor	Flood Risk Reduction	1963
Big Bear Lake Dam	Scioto	37	Poor	Flood Risk Reduction	1972
Schloss Pond Dam	Geauga	36	Poor	Recreation	1952
Mogadore Reservoir Dam	Portage	36	Poor	Recreation	1938
Lake Seneca Dam	Williams	36	Poor	Recreation	1966
Lake Rockwell Dam	Portage	35	Poor	Water Supply	1913
Guilford Lake Dam	Columbiana	35	Poor	Recreation	1933
Adams Lake Dam	Adams	34	Poor	Recreation	1947
East Branch Reservoir Dam	Geauga	34	Poor	Water Supply	1939
Findley Lake Dam	Lorain	33	Poor	Recreation	1956
Lake Grant Dam	Brown	32	Poor	Recreation	1948
Barnesville Lake Dam	Belmont	32	Poor	Recreation	1969
Lake Damascus Dam	Knox	31	Poor	Recreation	2010
Izaak Walton Lake Dam	Lawrence	31	Poor	Recreation
Lake Lucerne Dam	Geauga	30	Poor	Recreation	1922
Deer Lake Dam	Muskingum	30	Poor	Recreation	1957
Upper Shaker Lake Dam	Cuyahoga	30	Unsatisfactory	Recreation	1852
Rio Grande Reservoir	Gallia	30	Poor	Recreation	1959
Remick Lake Dam	Warren	29	Poor	Recreation	1966
Spring Valley Park Lake Dam	Columbiana	29	Poor	Water Supply	1993
Tycoon Lake Dam	Gallia	29	Poor	Recreation	1961
Powers Upground Reservoir	Crawford	28	Poor	Water Supply	1954
Long's Retreat Lake Dam	Pike	28	Poor	Recreation	1970
Muskingum College Lake Dam	Muskingum	28	Poor	Recreation	1935
Lake Katharine Dam	Jackson	27	Poor	Recreation	1945
Hunters Run Structure No. 3	Fairfield	27	Poor	Flood Risk Reduction	1960
Bibbee's Little Rock Lake Dam	Columbiana	27	Poor	Recreation	1960
Comet Lake Dam	Summit	26	Poor	Recreation	1922
Pine Lake Estates Dam	Fairfield	26	Poor	Recreation	1962
Pine Lake Dam	Logan	25	Poor	Recreation
Lake Cable Dam	Stark	25	Poor	Recreation	1926
Shreve Lake Dam	Wayne	25	Unsatisfactory	Recreation	1962
Lake Mosier Upground Reservoir	Hancock	25	Poor	Water Supply	1941
Coalburg Lake Dam	Trumbull	24	Poor	Recreation	1916
Waller Lake Dam	Lawrence	24	Poor	Recreation	1955
Hunters Run Structure R-42	Fairfield	24	Poor	Flood Risk Reduction	1959
Classicway Farm Lake Dam	Warren	24	Poor	Recreation	1965
Lake Loramie Dam	Shelby	23	Poor	Recreation	1844
Camp Spelman Lake Dam	Portage	23	Poor	Recreation
Clark Lake Dam	Clark	23	Poor	Recreation	1957
Hollenbeck Lake Dam	Cuyahoga	22	Poor	Recreation	1953
Ashtabula County Outdoor Club Lake Dam	Ashtabula	22	Poor	Recreation	1928
Delta Reservoir No. 1	Fulton	22	Poor	Water Supply	1933
Archbold Upground Reservoir No. 2	Fulton	22	Poor	Water Supply	1961
Pine Valley Sportsmen's Lake No. 4 Dam	Jefferson	22	Poor	Recreation	1964
Franz Pond Dam	Miami	21	Poor	Water Supply	1876
Horace Troop Pond Dam	Delaware	21	Poor	Recreation	1956
San Toy Dam	Perry	21	Poor	Recreation	1916
Belmont Hills Country Club Lake Dam	Belmont	21	Poor	Water Supply	1940
Swan Lake Dam	Summit	20	Poor	Recreation	1995
Pleasant Valley Lake Dam	Trumbull	20	Poor	Recreation	1925
Greenwich Reservoir Dam	Huron	20	Poor	Recreation	1921
Knox Cattle Company Dam	Knox	20	Unsatisfactory	Recreation	1945
Grand Lake St. Marys - West Embankment	Mercer	20	Poor	Recreation	1841
Altiers Lake Dam	Perry	19	Poor	Recreation	1949
Naji Lake Dam	Ashtabula	19	Poor	Recreation	1963
The Baltic Sportsman Lake Dam	Tuscarawas	19	Poor	Recreation	1957
Indian Lakes Rec. Area Lower Lake Dam	Guernsey	19	Poor	Recreation	1962
Lake Lamberjack Upground Reservoir	Hancock	19	Poor	Water Supply	1919
Bucyrus Reservoir No. 1 Dam	Crawford	18	Poor	Recreation	1900
Bellevue Upground Reservoir No. 4	Huron	18	Poor	Water Supply	1919
Artesian Lake Dam	Ashland	18	Poor	Recreation
Bellevue Upground Reservoir No. 3	Huron	18	Poor	Water Supply	1900
Sally Buffalo Park Lake No. 4 Dam	Harrison	18	Poor	Recreation	1953
Grand Lake St. Marys - East Embankment	Auglaize	18	Poor	Recreation	1841
Lower Jeffco Lake Dam	Ashtabula	17	Poor	Recreation	1963
Lower Shaker Lake Dam	Cuyahoga	17	Poor	Recreation	1830
Indian Lake Dam	Logan	16	Poor	Recreation	1852
Blanchester Reservoir No. 4 Dam	Clinton	16	Unsatisfactory	Water Supply	1950
Lake Alma Dam	Vinton	16	Poor	Recreation	1902
Brimfield Lake Dam	Portage	16	Poor	Recreation	1959
Blanchester Reservoir No. 3 Dam	Clinton	15	Poor	Water Supply	1934
Cedarville Upground Reservoir	Greene	15	Poor		1963
Archbold Upground Reservoir No. 1	Fulton	15	Poor	Water Supply	1957
Fayetteville High School Lake Dam	Brown	15	Poor	Recreation
Echo Lake Dam	Miami	14	Poor	Water Supply	1876
Bellevue Upground Reservoir No. 1	Huron	14	Poor	Water Supply	1874
North Reservoir Dam	Summit	13	Poor	Recreation	1840
Sally Buffalo Park Lake No. 2 Dam	Harrison	13	Poor	Recreation	1953
Ridgewood Lake Dam	Medina	12	Poor	Recreation	1965
Hickory Hills Park Lake Dam	Portage	12	Poor	Recreation	1958
Brye Lake Dam	Medina	12	Poor	Recreation	1988

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