Oldest Dams in Ohio

Ohio has 1190 dams with recorded construction dates. The oldest dates to 1830 — 196 years ago. Ohio's earliest dams were built in the 19th century, an era of westward expansion, irrigation development, and early water infrastructure. Older dams require particular attention for safety, as many were built before modern engineering standards.

#	Dam	County	Year Built	Age	Height (ft)	Hazard	Condition
1	Lower Shaker Lake Dam	Cuyahoga	1830	196 yrs	17	High	Poor
2	Liberty Street Dam	Trumbull	1831	195 yrs	12	Undetermined
3	Buckeye Lake Dam	Licking	1832	194 yrs	15	High	Satisfactory
4	Forty Acre Pond Dam	Auglaize	1840	186 yrs	15	Low	Poor
5	East Reservoir Dam	Summit	1840	186 yrs	25	High	Satisfactory
6	West Reservoir Dam	Summit	1840	186 yrs	22	High	Satisfactory
7	North Reservoir Dam	Summit	1840	186 yrs	13	High	Poor
8	Grand Lake St. Marys - East Embankment	Auglaize	1841	185 yrs	18	High	Poor
9	Grand Lake St. Marys - West Embankment	Mercer	1841	185 yrs	20	High	Poor
10	Muskingum River Lock And Dam No. 7	Morgan	1841	185 yrs	15	Significant	Poor
11	Muskingum River Lock And Dam No. 8	Morgan	1841	185 yrs	20	Significant	Poor
12	Muskingum River Lock And Dam No. 11	Muskingum	1841	185 yrs	15	Significant	Fair
13	Muskingum River Lock And Dam No. 10	Muskingum	1841	185 yrs	12	Significant	Poor
14	Muskingum River Lock And Dam No. 9	Muskingum	1841	185 yrs	18	Significant	Poor
15	Muskingum River Lock And Dam No. 4	Washington	1841	185 yrs	17	Significant	Poor
16	Muskingum River Lock And Dam No. 3	Washington	1841	185 yrs	18	Significant	Poor
17	Muskingum River Lock And Dam No. 2	Washington	1841	185 yrs	18	Significant	Fair
18	Muskingum River Lock And Dam No. 5	Washington	1841	185 yrs	20	Significant	Poor
19	Lake Hodgson Dam	Portage	1843	183 yrs	25	Significant	Fair
20	Lake Loramie Dam	Shelby	1844	182 yrs	23	High	Poor
21	Upper Shaker Lake Dam	Cuyahoga	1852	174 yrs	30	High	Unsatisfactory
22	Indian Lake Dam	Logan	1852	174 yrs	16	High	Poor
23	Wieser Lake Dam	Allen	1870	156 yrs	15	Low	Fair
24	Bellevue Upground Reservoir No. 1	Huron	1874	152 yrs	14	High	Poor
25	Echo Lake Dam	Miami	1876	150 yrs	14	High	Poor
26	Franz Pond Dam	Miami	1876	150 yrs	21	High	Poor
27	Swift Run Lake Dam	Miami	1876	150 yrs	39	Significant	Poor
28	Schoonover Lake Dam	Allen	1890	136 yrs	17	Low	Satisfactory
29	Minerva Park Lake Dam	Franklin	1890	136 yrs	19	Low	Satisfactory
30	Lake Daugherty Upground Reservoir	Hancock	1891	135 yrs	12	Significant	Poor
31	Lake Mottram Upground Reservoir	Hancock	1891	135 yrs	20	High	Fair
32	Stockport Mill Country Inn Water Power Project	Morgan	1891	135 yrs	20	High	Satisfactory
33	Norwalk Upper Reservoir	Huron	1896	130 yrs	39	High	Satisfactory
34	Norwalk Lower Reservoir	Huron	1896	130 yrs	34	High	Satisfactory
35	Lake Cohasset Dam	Mahoning	1897	129 yrs	25	Significant	Poor
36	North Kingsville Route 20 Lake Dam	Ashtabula	1900	126 yrs	22	Significant	Poor
37	Bucyrus Reservoir No. 1 Dam	Crawford	1900	126 yrs	18	High	Poor
38	Bellevue Upground Reservoir No. 3	Huron	1900	126 yrs	18	High	Poor
39	Lake Park Dam	Mahoning	1900	126 yrs	12	Low	Poor
40	Rogers Lake Dam	Morrow	1900	126 yrs	14	Significant	Fair
41	Lower Woodsfield Reservoir Dam	Monroe	1901	125 yrs	47	Significant	Poor
42	Lake Alma Dam	Vinton	1902	124 yrs	16	High	Poor
43	Lima Upground Reservoir	Allen	1903	123 yrs	25	Significant	Poor
44	Barnesville Reservoir No. 1 Dam	Belmont	1904	122 yrs	42	High	Fair
45	Amann Reservoir Dam	Morrow	1904	122 yrs	32	Significant	Poor
46	Julian Griggs Dam	Franklin	1905	121 yrs	52	High	Fair
47	Lake Glacier Dam	Mahoning	1905	121 yrs	24	Low	Fair
48	Lake Hamilton Dam	Mahoning	1905	121 yrs	70	High	Poor
49	Grand Rapids Dam	Wood	1907	119 yrs	8	High	Fair
50	Providence Dam	Wood	1907	119 yrs	9	High	Fair

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