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Geography Home Browse by State Browse by Feature Definitions Top 10 |
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Geography Home Browse by State Browse by Feature Definitions Top 10 |
Ohio Dam
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Feature Name
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County
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Latitude
|
Longitude
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| Acton Lake Dam | Butler | 39.55667 | -84.735 |
| Adams Lake Dam | Adams | 38.81333 | -83.51667 |
| Adena Fish and Game Club Dam | Harrison | 40.25 | -80.88833 |
| Ahrens Lake Dam | Richland | 40.725 | -82.66667 |
| Al-Char Lake Dam 9242-002 | Warren | 39.325 | -84.3 |
| Altiers Lake Dam | Perry | 39.65167 | -82.085 |
| Alum Creek Lake Dam | Delaware | 40.17667 | -82.95667 |
| Amann Reservoir Dam | Morrow | 40.71333 | -82.82333 |
| Amicks Upground Reservoir Dam | Morrow | 40.71333 | -82.82 |
| Angler Paradise Lake Dam | Fairfield | 39.655 | -82.495 |
| Anthony Mining Company Dam | Jefferson | 40.47333 | -82.68167 |
| Antonoff Pond Dam | Mahoning | 40.98 | -80.68667 |
| Apple Hill Farm Lake Dam | Hamilton | 39.07667 | -84.41 |
| Apple Valley Lake Dam | Knox | 40.42167 | -82.34333 |
| Appleseed Ridge Lake Number One Dam | Logan | 40.39 | -83.635 |
| Appleseed Ridge Lake Number Two Dam | Logan | 40.38167 | -83.64 |
| Armco Pond Dam | Highland | 39.36667 | -83.51667 |
| Armington Lake Dam | Ashtabula | 41.75167 | -80.88333 |
| Arrowhead Lake Dam | Mahoning | 40.90667 | -80.69333 |
| Ashtabula County Outdoor Club Lake Dam | Ashtabula | 41.87667 | -80.71 |
| Athens Fish and Game Club Lake Dam | Athens | 39.3 | -82.28 |
| Atomic Energy Commission Dam | Pike | 39.02833 | -82.98667 |
| Atomic Energy Commission Pond Dam | Pike | 39.02 | -82.98667 |
| Attica Upground Reservoir Dam | Seneca | 41.05333 | -82.89 |
| Atwood Dam | Tuscarawas | 40.52667 | -81.285 |
| Aurora Pond Dam | Portage | 41.325 | -81.39333 |
| Avondale Wildlife Area Dam Number One | Muskingum | 39.84 | -82.105 |
| Avondale Wildlife Area Dam Number Two | Muskingum | 39.84333 | -82.095 |
| B & O Railroad Pond 1025-006 Dam | Huron | 41.06167 | -82.73833 |
| B & O Railroad Pond 1026-001 Dam | Huron | 41.065 | -82.75833 |
| B & O Railroad Pond Dam | Belmont | 40.155 | -81.11 |
| Bakers Pond Dam | Muskingum | 39.975 | -81.81833 |
| Baldwin Lake Dam | Cuyahoga | 41.36333 | -81.855 |
| Ballville Dam | Sandusky | 40.54167 | -83.13667 |
| Banks Pond Dam | Richland | 40.67167 | -82.35333 |
| Banquet Foods Reservoir Dam | Jackson | 39.1 | -82.53833 |
| Baptist Foundation Lake Dam | Clinton | 39.47333 | -83.91167 |
| Bar-E Club Lake Dam | Darke | 40.31833 | -84.62833 |
| Barhorst Lake Dam | Shelby | 40.29833 | -84.37833 |
| Barnesville Lake Dam | Belmont | 39.99833 | -81.18167 |
| Barnesville Reservoir Number One Dam | Belmont | 39.965 | -81.16667 |
| Barnesville Reservoir Number Three Dam | Belmont | 39.90833 | -81.16 |
| Barnesville Reservoir Number Two Dam | Belmont | 39.97167 | -81.165 |
| Bartley Pond Dam | Greene | 39.64833 | -83.82833 |
| Bass Lake Dam | Huron | 41.09333 | -82.735 |
| Bassage Lake Dam | Jefferson | 40.24833 | -80.87667 |
| Beach City Dam | Tuscarawas | 40.63694 | -81.55778 |
| Bear Creek Lake Dam | Scioto | 38.78167 | -83.17667 |
| Bear Pond Dam | Butler | 39.53 | -84.50167 |
| Beartown Lake Dam | Geauga | 41.355 | -81.29833 |
| Beaver Creek Upground Reservoir Dam | Seneca | 41.235 | -83.02 |
| Beaver Lake Dam | Columbiana | 40.88694 | -80.62889 |
| Bel-Wood Country Club Lake Dam | Warren | 39.34333 | -84.15667 |
| Bell Lake Dam | Summit | 41.19667 | -81.52333 |
| Bell Pond Dam | Logan | 40.415 | -83.79167 |
| Bellevue Reservoir Number Five Dam | Huron | 41.215 | -82.775 |
| Bellevue Reservoir Number Three Dam | Huron | 41.27 | -82.825 |
| Bellevue Upground Reservoir Number Four Dam | Huron | 41.26167 | -82.82333 |
| Bellevue Upground Reservoir Number One Dam | Huron | 41.26833 | -82.82667 |
| Bellwood Lake Dam | Geauga | 41.43833 | -81.32667 |
| Belmont Lake Dam | Belmont | 40.03333 | -81.01 |
| Benua Lake Dam | Fairfield | 39.58333 | -82.625 |
| Berkshire Lake Dam | Delaware | 39.23 | -82.89833 |
| Berlin Dam | Portage | 41.04583 | -81.00278 |
| Bethel Reservoir Dam | Clermont | 38.98667 | -84.07 |
| Bethesda Reservoir Dam | Belmont | 40.015 | -81.06333 |
| Bethesda Sportsmans Club Pond Dam | Belmont | 39.98667 | -81.09833 |
| Bibbees Little Rock Lake Dam | Columbiana | 40.68 | -80.64 |
| Big Island Wildlife Area Dam | Marion | 40.59 | -83.27333 |
| Big Rock Lake Dam | Columbiana | 40.85667 | -80.75167 |
| Bishard Pond Dam | Guernsey | 40.155 | -81.60167 |
| Black Brook Dike | Geauga | 41.35083 | -81.21083 |
| Black Lake Dam | Butler | 39.56167 | -84.38667 |
| Blanchester Reservoir Number Three Dam | Clinton | 39.28833 | -83.97833 |
| Blatt Pond Dam | Belmont | 39.865 | -81.10667 |
| Blue Rock Lake Dam | Muskingum | 39.81667 | -81.85167 |
| Bluffton College Lake Dam | Allen | 40.905 | -83.90833 |
| Boehmler Pond Dam | Warren | 39.37667 | -84.175 |
| Bogart Pond Dam | Columbiana | 40.65167 | -80.71833 |
| Boich Mining Company Pond Number One Dam | Jefferson | 40.31167 | -80.77 |
| Boich Mining Company Pond Number Two Dam | Jefferson | 40.31667 | -80.77333 |
| Boka Woods Number One Dam | Fairfield | 39.65 | -82.59167 |
| Bolivar Dam | Tuscarawas | 40.64861 | -81.43278 |
| Boreman Lake Dam | Wayne | 40.90167 | -82.03333 |
| Boston Lock | Summit | 41.26556 | -81.55889 |
| Bowers Lake Dam | Lawrence | 38.45 | -82.57333 |
| Bowers Pond Dam | Jefferson | 40.41667 | -80.80167 |
| Bradford Dam | Harrison | 40.19833 | -80.965 |
| Brail Lake Dam | Ashtabula | 41.76167 | -80.875 |
| Brammer Pond Dam | Lawrence | 38.50667 | -82.54833 |
| Brentwood Lake Dam | Lorain | 41.31833 | -82.07333 |
| Bresler Upground Reservoir Dam | Allen | 40.73667 | -84.23333 |
| Bridge Creek Dam | Geauga | 41.40667 | -81.18667 |
| Brocklehurst Lake Dam | Stark | 40.78 | -81.115 |
| Brodie Lake Dam | Brown | 38.87833 | -84.03 |
| Broken Aro Sedimentation Dam Number Four | Coshocton | 40.23167 | -81.98833 |
| Broken Aro Slurry Dam Number Four | Coshocton | 40.21667 | -81.95667 |
| Broken Aro Slurry Dam Number One | Coshocton | 40.21 | -81.955 |
| Broken Aro Slurry Dam Number Three | Coshocton | 40.21333 | -81.955 |
| Broken Aro Slurry Dam Number Two | Coshocton | 40.21167 | -81.955 |
| Brookside Country Club Lake Dam | Franklin | 40.09167 | -83.065 |
| Brookside Development Company Dam | Medina | 41.10833 | -81.79167 |
| Browns Recreation Lake Dam | Williams | 41.56667 | -84.67 |
| Brukner Lake Dam | Miami | 40.015 | -84.3 |
| Bruno Pond Dam | Ashtabula | 41.74 | -80.99833 |
| Brushy Fork Dam Number Seven | Harrison | 40.24 | -81.04167 |
| Buckeye Lake Dam | Licking | 39.92833 | -82.48833 |
| Bucyrus Reservoir Number One Dam | Crawford | 40.82 | -82.92833 |
| Bucyrus Reservoir Number Two Dam | Crawford | 40.82 | -82.92667 |
| Bunker Hill Haven Lake Dam | Butler | 39.41667 | -84.74 |
| Burgess Lake Dam | Mahoning | 41.005 | -80.6 |
| Burt Lake Dam | Paulding | 41.10667 | -84.41833 |
| Burton Lake Dam | Warren | 39.315 | -84.12 |
| C M Luburgh Estate Pond Number 9717-005 Dam | Muskingum | 39.95333 | -81.91833 |
| C M Luburgh Estate Pond Number 9717-011 Dam | Muskingum | 39.95 | -81.92333 |
| Cadiz Country Club Lake Dam | Harrison | 40.25 | -80.99 |
| Caesar Creek Dike B Dam | Warren | 39.525 | -84.01667 |
| Caesar Creek Dike F Dam | Warren | 39.50833 | -84.05 |
| Caesar Creek Lake Dam | Warren | 39.45833 | -83.97333 |
| Caesar Creek Lake Dike A | Warren | 39.45833 | -83.97333 |
| Caldwell Lake Dam | Noble | 39.775 | -81.52833 |
| Calvins Marsh Dam | Mahoning | 40.98 | -80.69167 |
| Cambridge City Reservoir Dam | Guernsey | 40.005 | -81.55833 |
| Camp Butler Lake Dam | Summit | 41.21667 | -81.51667 |
| Camp Conestoga Lake Dam | Carroll | 40.685 | -81.125 |
| Camp Conger Lake Dam | Huron | 41.085 | -82.65167 |
| Camp Crowell Dam | Summit | 41.24167 | -81.67667 |
| Camp Francis Asbury Pond Dam | Gallia | 38.85667 | -82.42167 |
| Camp Hilaka Dam | Summit | 41.24833 | -81.67667 |
| Camp Jungen Lake Dam | Tuscarawas | 40.43667 | -81.61333 |
| Camp Lakota Boy Scout Lake Dam | Defiance | 41.25 | -84.38 |
| Camp Otterbein Lake Dam | Hocking | 39.495 | -82.37167 |
| Camp Ross Trails Lake Dam | Butler | 39.31667 | -84.67 |
| Camp Seneca Lake Dam | Guernsey | 39.92167 | -81.47167 |
| Camp Wesley Lake Dam | Logan | 40.43667 | -83.72833 |
| Camp Whitewood Lake Dam | Ashtabula | 41.52667 | -80.96667 |
| Candlewood Lake Dam | Morrow | 40.615 | -82.785 |
| Captain Anthony Meldahl Lock And Dam | Clermont | 38.79722 | -84.17056 |
| Cardinal Fly Ash Retention Dam | Jefferson | 40.26833 | -80.65 |
| Carol-Jane Lake Dam | Medina | 41.19667 | -81.83333 |
| Carroll Kemp Corporation Dam | Carroll | 40.58333 | -81.09833 |
| Carter and Evans Lake Dam | Gallia | 38.88 | -82.24667 |
| Carter Lake Dam | Summit | 41.12333 | -81.42667 |
| Cave Lake Dam | Pike | 39.09167 | -83.32 |
| Cedarville Reservoir Dam | Greene | 39.74167 | -83.815 |
| Celeryville Upground Reservoir Dam | Crawford | 40.99 | -82.735 |
| Central Ohio Coal Company Nb-151 Dam | Noble | 39.78 | -81.615 |
| Central Ohio Council BSA Pond Dam | Hocking | 39.53 | -82.31833 |
| Central Silica Company Pond 9722-012 Dam | Perry | 39.88667 | -82.28333 |
| Charles Mill Dam | Ashland | 40.74028 | -82.3625 |
| Chase Bag Company Lower Lake Dam | Cuyahoga | 41.435 | -81.385 |
| Chase Bag Company Upper Lake Dam | Cuyahoga | 41.44167 | -81.37833 |
| Chateau Lakes Dam Number One | Hamilton | 39.18833 | -84.645 |
| Chateau Lakes Dam Number Two | Hamilton | 39.18833 | -84.64667 |
| Chautauqua Dam | Warren | 39.58667 | -84.28833 |
| Chiefs Lake Dam | Warren | 39.41667 | -83.98167 |
| Chippewa Conservation District Structure VII C Dam | Wayne | 40.885 | -81.79667 |
| Chitwood Pond Dam | Warren | 39.31 | -84.23 |
| Christian Center Lake Dam | Licking | 39.955 | -82.65333 |
| Christian Union Church Lake Dam | Ross | 39.19667 | -83.15167 |
| Cincinnati Gas and Electric Lake Dam | Clermont | 38.98167 | -84.29333 |
| Cincinnati Nature Center Lake Dam | Clermont | 39.12333 | -84.24333 |
| Cinnamon Lake Dam | Ashland | 40.985 | -82.17833 |
| City of Canton Sludge Pond Dam | Stark | 40.69667 | -81.33833 |
| Clare Mar Camp Lake Dam | Lorain | 41.07 | -82.25167 |
| Clarence J Brown Dam | Clark | 39.95 | -83.74667 |
| Clark Chapel Acres Recreation Pond Dam | Gallia | 38.93833 | -82.27667 |
| Clark Lake Dam | Clark | 39.94833 | -83.66 |
| Clark Lakes Pond One Dam | Pickaway | 39.775 | -83.17 |
| Clark Run Dam | Pickaway | 39.635 | -83.245 |
| Clays Park Lake Dam | Stark | 40.86333 | -81.59 |
| Clearfork Reservoir Dam | Richland | 40.69833 | -82.60667 |
| Clendening Dam | Harrison | 40.27139 | -81.27694 |
| Clermont NE Schools Lake Dam | Clermont | 39.13167 | -84.10333 |
| Clinton County Tributary Number One Dam | Clinton | 39.45667 | -83.81 |
| Clouse Lake Dam | Perry | 39.765 | -82.30333 |
| Cloverdale Lake Dam | Lake | 41.69167 | -81.24 |
| Coalburg Lake Dam | Trumbull | 41.19667 | -80.58667 |
| Coldstream Country Club Lake Dam | Hamilton | 39.05333 | -84.34333 |
| Colebrook Lake Dam | Portage | 41.29333 | -81.375 |
| Collier Lake Dam | Mahoning | 40.99833 | -80.58833 |
| Columbia Lake Dam | Summit | 41.00333 | -81.61833 |
| Columbus and Southern Ohio Electric Company Ash Pond Dam | Athens | 39.38833 | -82.17833 |
| Comet Lake Dam | Summit | 40.92333 | -81.52667 |
| Comstock Pond Dam | Morgan | 39.56833 | -81.94333 |
| Congress Lake Dam | Stark | 40.975 | -81.325 |
| Consoldiation Coal Company Pond 0107-034 Dam | Harrison | 40.165 | -80.94667 |
| Consolidation Coal Company Dam 0107-013 | Harrison | 40.24667 | -80.94333 |
| Consolidation Coal Company Pond 0010-016 Dam | Belmont | 40.04333 | -81.145 |
| Consolidation Coal Company Pond 0110-002 Dam | Harrison | 40.16667 | -81.08333 |
| Consolidation Coal Company Pond 0110-005 Dam | Belmont | 40.155 | -81.065 |
| Consolidation Coal Company Pond 0110-012 Dam | Harrison | 40.19333 | -81.07667 |
| Consolidation Coal Company Pond 0110-014 Dam | Harrison | 40.19 | -81.12 |
| Consolidation Coal Company Pond 0110-016 Dam | Harrison | 40.20667 | -81.09167 |
| Consolidation Coal Company Pond 0110-017 Dam | Harrison | 40.20333 | -81.09333 |
| Consolidation Coal Company Pond 0110-022 Dam | Harrison | 40.20833 | -81.045 |
| Consolidation Coal Company Pond 0110-024 Dam | Harrison | 40.205 | -81.03833 |
| Consolidation Coal Company Pond 0110-028 Dam | Harrison | 40.23167 | -81.03667 |
| Consolidation Coal Company Pond 0207-019 Dam | Harrison | 40.31667 | -80.91667 |
| Consolidation Coal Pond 0210-010 Dam | Harrison | 40.265 | -81.055 |
| Contractors Realty Corporation Pond Dam | Huron | 41.235 | -82.64833 |
| Cook Pond Dam | Fairfield | 39.76833 | -82.73167 |
| Cooke Pond Dam Number One | Richland | 40.94 | -82.71833 |
| Cooke Pond Dam Number Two | Richland | 40.94167 | -82.72333 |
| Coppedge Pond Dam | Trumbull | 41.42833 | -80.97833 |
| Cowan Lake Dam | Clinton | 39.38861 | -83.92472 |
| Coy Lake Dam | Holmes | 40.50167 | -82.13833 |
| Crall Pond Dam | Ashland | 41.02 | -82.42667 |
| Crawford Pond Dam | Harrison | 40.31667 | -80.92 |
| Crawley Lake Dam | Ross | 39.295 | -83.285 |
| Crooksville Reservoir Number One Dam | Morgan | 39.76167 | -82.04667 |
| Crooksville Reservoir Number Three Dam | Perry | 39.70167 | -82.075 |
| Crooksville Reservoir Number Two Dam | Morgan | 39.765 | -82.04333 |
| Croskey Pond Dam | Harrison | 40.265 | -80.92833 |
| Cross Creek Coal Company Dam 0314-001 | Tuscarawas | 40.44333 | -81.50167 |
| Cross Pond Dam | Preble | 39.64167 | -84.65333 |
| Crystal Lake Dam | Summit | 41.14833 | -81.65667 |
| Csonka Brothers Pond Dam | Columbiana | 41.79667 | -80.79167 |
| Culbertson Farm Lake Dam | Guernsey | 40.09833 | -81.59833 |
| Cuyahoga Falls Low Head Dam | Summit | 41.13833 | -81.48167 |
| Cyanamid Corporation Pond Dam | Washington | 39.43 | -81.425 |
| Dale Walborn Reservoir Dam | Stark | 40.97333 | -81.17833 |
| Dam Number 1 (historical) | Washington | 39.41278 | -81.45722 |
| Dam Number 2 | Washington | 39.47 | -81.49194 |
| Dam Number 33 (historical) | Adams | 38.63611 | -83.70194 |
| Darke Company Lake Wildlife Area Pond Five Dam | Darke | 40.12 | -84.52167 |
| Darrow Lake Dam | Guernsey | 40.185 | -81.62667 |
| Darrow Pond Dam | Guernsey | 40.185 | -81.62667 |
| Davis Pond Dam | Ashtabula | 41.88 | -80.63333 |
| Dawes Arboretum Pond Dam | Licking | 39.96833 | -82.41667 |
| Decker Lake Dam | Miami | 40.19 | -84.28333 |
| Deep Lock (historical) | Summit | 41.23333 | -81.55972 |
| Deer Creek Reservoir Dam | Stark | 40.96833 | -81.11667 |
| Deercreek Dam | Pickaway | 39.62417 | -83.21667 |
| Dela Pama Fishing Lake Dam | Clermont | 39.05833 | -84.04333 |
| Delaware Dam | Delaware | 40.35861 | -83.06917 |
| Delta Reservoir Dam | Fulton | 41.59 | -84.01167 |
| Dever Pond Dam | Butler | 39.31333 | -84.72833 |
| Di-Or Pond Dam | Jackson | 39.01667 | -82.59333 |
| Dieckbrader Lake Dam | Brown | 39.155 | -83.91833 |
| Diehl Lake Dam | Mahoning | 41.01167 | -80.86167 |
| Diehr Lake Dam | Muskingum | 39.88 | -82.10167 |
| Dillon Dam | Muskingum | 39.99278 | -82.0825 |
| Dodge Pond Dam | Adams | 38.84667 | -83.59 |
| Dogwood Valley Camp Lake Dam | Morrow | 40.58333 | -82.81667 |
| Donta Pond Dam | Jackson | 38.86333 | -82.46333 |
| Dorothy Mine Pond Dam | Jefferson | 40.16 | -80.76167 |
| Doughman Lake Dam | Butler | 39.52 | -84.58 |
| Dover Dam | Tuscarawas | 40.55722 | -81.4125 |
| Drumm Pond Dam | Logan | 40.33333 | -83.71833 |
| Dunglen Mine Impoundment Dam | Jefferson | 40.19167 | -80.80833 |
| Dunlap Lake Dam | Pickaway | 39.53167 | -83.16667 |
| Dunlap Pond Dam Number One | Pickaway | 39.625 | -83.13167 |
| Dunlap Pond Dam Number Three | Pickaway | 39.61667 | -83.165 |
| Dunlap Pond Dam Number Two | Pickaway | 39.61333 | -83.17667 |
| Dush Pond Dam | Wayne | 40.73833 | -81.975 |
| East Branch Reservoir Dam | Geauga | 41.50333 | -81.095 |
| East Fork Buck Creek Structure 3a Dam | Champaign | 40.04167 | -83.65 |
| East Fork Buck Creek Structure Number 1B Dam | Champaign | 40.03667 | -83.605 |
| East Fork Buck Creek Structure Number 4a Dam | Champaign | 40.03167 | -83.635 |
| East Fork Lake Saddle Dam | Clermont | 38.95333 | -84.085 |
| East Liberty Lake Dam | Logan | 40.36667 | -83.60333 |
| East Reservoir Dam | Summit | 41.00167 | -81.53167 |
| Echo Hills Lake Number One Dam | Cuyahoga | 41.28833 | -81.595 |
| Edward Smith Lake Dam | Knox | 40.52833 | -82.435 |
| Edwin Naus Lake Dam | Wyandot | 40.72 | -83.15833 |
| Effluent Treatment Pond Number Four Dam | Ashtabula | 41.91 | -80.75 |
| Elk Lake Dam | Warren | 39.39917 | -84.11222 |
| Elks Country Club Dam | Scioto | 38.80833 | -83.01 |
| Ellis Dam | Muskingum | 40.04278 | -81.97722 |
| Ellis Lake Dam | Wyandot | 40.88667 | -83.23 |
| Englewood Dam | Montgomery | 39.87 | -84.285 |
| Englewood Recreation Dam | Montgomery | 39.87167 | -84.28667 |
| Eppley Pond Dam | Lorain | 41.22833 | -82.065 |
| Essington Lake Dam | Perry | 39.75833 | -82.20833 |
| Evans Lake Dam | Brown | 39.16667 | -83.92667 |
| Fair Haven Lake Dam | Lawrence | 38.51667 | -82.60333 |
| Fairmount Upground Reservoir Dam | Cuyahoga | 41.495 | -81.61 |
| Fallerius Pond Dam | Richland | 40.71333 | -82.59167 |
| Farm Lake Dam | Tuscarawas | 40.425 | -81.59833 |
| Fay Dam | Harrison | 40.395 | -80.95833 |
| Ferguson Upground Reservoir Dam | Allen | 40.73833 | -84.04333 |
| Fifth Avenue Low Head Dam | Franklin | 39.98833 | -83.025 |
| Findlay Upground Reservoir Number One Dam | Hancock | 41.00833 | -83.565 |
| Findlay Upground Reservoir Number Two Dam | Hancock | 41.01 | -83.57167 |
| Findley Lake Dam | Lorain | 41.13833 | -82.20833 |
| Firelands Boy Scout Lake Dam | Lorain | 41.27833 | -82.33833 |
| Forest Hill Park Dam Number Two | Cuyahoga | 41.52 | -81.58 |
| Forest Lake Dam | Medina | 41.13167 | -81.80833 |
| Forked Run Lake Dam | Meigs | 39.09167 | -81.76833 |
| Forty Acre Pond Dam | Auglaize | 40.58333 | -84.39 |
| Foster Lake Dam | Harrison | 40.37 | -81.025 |
| Fostoria Upground Reservoir Dam | Hancock | 41.11833 | -83.445 |
| Fourmile Lake Dam | Hamilton | 39.06333 | -84.395 |
| France Lake Dam | Carroll | 40.66833 | -80.95333 |
| Friendship Park Lake Dam | Jefferson | 40.28333 | -80.765 |
| Fry Pond Dam | Stark | 40.66667 | -81.345 |
| Galicki Pond Dam | Ashtabula | 41.56167 | -80.66333 |
| Gallahan Pond Dam | Jackson | 39.14 | -82.62833 |
| Gardner Pond Dam | Licking | 40.04833 | -82.71 |
| Gavin Bottom Ash Pond Dam | Gallia | 38.93333 | -82.125 |
| Gavin Fly Ash Dam | Gallia | 38.96333 | -82.145 |
| Geneva Low Head Dam | Ashtabula | 41.75667 | -80.945 |
| George McClure Pond Dam | Lawrence | 38.64833 | -82.545 |
| Georgetown Plant Lower Supply Dam | Harrison | 40.23167 | -80.99667 |
| Georgetown Plant Upper Supply Dam | Harrison | 40.225 | -80.995 |
| Georgetown Upground Reservoir Dam | Brown | 38.86333 | -83.92167 |
| Georgetown Upper Dam Number One | Harrison | 40.21833 | -80.955 |
| Georgetown Upper Dam Number Two | Harrison | 40.215 | -80.96167 |
| Geottl Pond Dam | Richland | 40.72667 | -82.43167 |
| Germantown Dam | Montgomery | 39.63722 | -84.4025 |
| Gier Pond Dam | Hamilton | 39.19667 | -84.32 |
| Glass Pond Dam | Warren | 39.54667 | -84.12167 |
| Gleasonkamp Pond Dam | Delaware | 40.33833 | -83.04167 |
| Glen Ridge Lake Dam | Clermont | 39.10167 | -84.26667 |
| Go-Tag-A-Long Lake Dam | Columbiana | 40.89 | -80.58167 |
| Golden Bear Reservoir Dam | Delaware | 40.145 | -83.13667 |
| Goldman Pond Dam | Clermont | 38.97833 | -84.19333 |
| Goodfellows Park Lake Dam | Washington | 39.38833 | -81.58333 |
| Gorge Metropolitan Park Dam | Summit | 41.12333 | -81.49833 |
| Gould Pond Dam | Columbiana | 40.85 | -80.535 |
| Grafton Reservoir Dam | Lorain | 41.26667 | -82.04667 |
| Grand Rapids Dam | Wood | 41.41222 | -83.87611 |
| Granger Lake Dam | Medina | 41.15333 | -81.69167 |
| Grant Lake Dam | Brown | 38.92 | -83.92833 |
| Gray Pond Dam | Warren | 39.42333 | -84.09833 |
| Great Trails Girl Scouts Pond Dam | Carroll | 40.70833 | -81.16 |
| Green Lake Dam | Hamilton | 39.185 | -84.70833 |
| Greenfield Lake Dam | Fairfield | 39.77167 | -82.63333 |
| Greenlawn Avenue Low Head Dam | Franklin | 39.94167 | -83.00167 |
| Greenwich Reservoir Dam | Huron | 41.02667 | -83.35 |
| Greenwood Lake Dam | Delaware | 40.31 | -83.055 |
| Gressard Lake Dam | Portage | 41.20667 | -81.36667 |
| Gross Dam | Wayne | 40.79667 | -81.99 |
| Guffey Lake Dam | Montgomery | 39.61167 | -84.37833 |
| Guilford Lake Dam | Columbiana | 40.795 | -80.87167 |
| Halley Pond Dam | Morgan | 39.56167 | -81.835 |
| Hammertown Lake Dam | Jackson | 39.05667 | -82.685 |
| Hannibal Locks And Dam | Monroe | 39.66694 | -80.86639 |
| Happy Times Farm Pond Dam | Warren | 39.34667 | -84.16833 |
| Harding Area Council BSA Dam | Morrow | 40.595 | -82.81333 |
| Hargus Lake Dam | Pickaway | 39.62667 | -82.88833 |
| Harmony Lake Dam | Wayne | 40.79333 | -81.735 |
| Harper Pond Dam | Warren | 39.32333 | -84.1 |
| Harrison Lake Dam | Fulton | 41.63972 | -84.36111 |
| Hart Pond Dam | Miami | 39.90667 | -84.15167 |
| Hay Hollow Reservoir Dam | Pike | 39.12667 | -82.82667 |
| Hayes Lake Dam | Cuyahoga | 41.27833 | -81.735 |
| Hays Lake Dam | Williams | 41.685 | -84.705 |
| Heritage Lake Dam | Clermont | 39.14333 | -84.13167 |
| Herr Pond Dam | Trumbull | 41.29167 | -80.72167 |
| Hickory Hills Lake Dam | Highland | 39.18667 | -83.39667 |
| Hickory Hollow Lake Dam | Guernsey | 40.15333 | -81.42 |
| Hickory Lake Dam | Holmes | 40.49167 | -81.905 |
| Hidden Haven Lake Dam | Guernsey | 40.13 | -81.30167 |
| Hidden Lake Dam | Hocking | 39.46167 | -82.49167 |
| Highland Greens Apartments Dam | Butler | 39.34333 | -84.40167 |
| Highlandtown Lake Dam | Columbiana | 40.6375 | -80.74889 |
| Hill Pond Dam | Stark | 40.73333 | -81.145 |
| Hills Pond Dam | Summit | 41.06333 | -81.39333 |
| Hillsboro Reservoir Dam | Highland | 39.24667 | -83.6 |
| Hinckley Lake Dam | Medina | 41.225 | -81.72 |
| Hoar Pond Dam | Licking | 40.215 | -82.45667 |
| Hocking Hills Reservoir Dam | Hocking | 39.425 | -82.53833 |
| Holiday Camplands Lake Dam | Ashtabula | 41.63167 | -80.56167 |
| Holiday Lake Dam | Huron | 41.10167 | -82.73167 |
| Hoover Dam | Franklin | 40.10806 | -82.88194 |
| Hosterman Lake Dam | Clark | 39.91167 | -83.905 |
| Houston Upground Reservoir Dam | Clinton | 39.28167 | -83.91833 |
| Huffman Dam | Greene | 39.7975 | -84.09056 |
| Hunters Run Conservation District Structure Four Dam | Fairfield | 39.68833 | -82.645 |
| Hunters Run Conservation District Structure One Dam | Fairfield | 39.71667 | -82.70333 |
| Hunters Run Conservation District Structure Six Dam | Fairfield | 39.77 | -82.66833 |
| Hunters Run Conservation District Structure Three Dam | Fairfield | 39.7 | -82.65 |
| Hunters Run Conservation District Structure Two Dam | Fairfield | 39.705 | -82.68333 |
| Ilg Pond Dam | Stark | 40.86 | -81.51667 |
| Independence Dam | Defiance | 41.29167 | -84.28167 |
| Indian Canoe Lake Dam | Portage | 41.165 | -81.19167 |
| Indian Lake Dam | Logan | 40.4675 | -83.87556 |
| Industrial Mining Lake Dam | Columbiana | 40.72 | -80.80167 |
| Island Fishing Lakes Dam | Butler | 39.44167 | -84.68667 |
| Island Park Dam | Montgomery | 39.775 | -84.19333 |
| Izaak Walton Lake Dam | Lawrence | 38.675 | -82.585 |
| Jackson Lake Dam | Jackson | 38.89167 | -82.60167 |
| Jacobs Lake Dam | Ashland | 40.83167 | -82.29167 |
| Jeans Lake Dam | Medina | 41.10333 | -81.80833 |
| Jeffco Lake Dam | Ashtabula | 41.565 | -80.64333 |
| Jefferson Lake Dam | Jefferson | 40.46 | -80.795 |
| Jefferson Sportsmens Lake Number One Dam | Jefferson | 40.325 | -80.795 |
| Jefferson Sportsmens Lake Number Three Dam | Jefferson | 40.335 | -80.80333 |
| Jefferson Sportsmens Lake Number Two Dam | Jefferson | 40.32833 | -80.795 |
| Jisco Lake Dam | Jackson | 39.09667 | -82.67167 |
| Julian Griggs Dam | Franklin | 40.01556 | -83.09444 |
| Karr Lake Dam | Meigs | 39.05833 | -81.95333 |
| Kenston Lake Dam | Geauga | 41.38167 | -81.34833 |
| Kettenring Hills Dam | Defiance | 41.295 | -84.33 |
| Kilbarger Pond Dam | Fairfield | 39.77167 | -82.59 |
| Killdeer Upground Reservoir Dam | Wyandot | 40.7 | -83.38 |
| Killdeer Wildlife Pond Dam Number One | Wyandot | 40.70333 | -83.28833 |
| Killdeer Wildlife Pond Dam Number Three | Wyandot | 40.70833 | -83.27833 |
| Killdeer Wildlife Pond Dam Number Two | Wyandot | 40.71 | -83.28833 |
| Kings Lake Dam | Mahoning | 41.085 | -80.52 |
| Kirby Lake Dam | Summit | 41.22 | -81.67167 |
| Kirila Pond Dam | Trumbull | 41.23167 | -80.55333 |
| Kiser Lake Dam | Champaign | 40.19667 | -83.98167 |
| Kittredge Pond Dam | Geauga | 41.63 | -81.11333 |
| Kleinienst Lake Dam | Ashtabula | 41.72333 | -80.805 |
| Knechtly Pond Dam | Hamilton | 39.285 | -84.33 |
| Knoles Pond Dam | Ross | 39.25833 | -82.98333 |
| Knox Lake Dam | Knox | 40.49667 | -82.52528 |
| Kohart Lake Dam | Defiance | 41.23167 | -84.39333 |
| Kohl Lake Dam | Williams | 41.685 | -84.70667 |
| Kornvolt Farms Pond Dam | Highland | 39.25667 | -83.61833 |
| Lahmers Lake Dam | Tuscarawas | 40.53 | -81.55 |
| Lake A Dam | Williams | 41.695 | -84.68167 |
| Lake Alma Dam | Vinton | 39.14528 | -82.51417 |
| Lake Austin Dam | Jefferson | 40.48667 | -80.73833 |
| Lake Beaumont Dam | Ashtabula | 41.685 | -80.88 |
| Lake Ber Al Dam | Lorain | 41.07333 | -82.255 |
| Lake Brunswick Dam | Medina | 41.235 | -81.81167 |
| Lake Buckhorn Dam | Holmes | 40.46 | -81.91 |
| Lake C Dam | Williams | 41.69833 | -84.68833 |
| Lake Cable Dam | Stark | 40.85667 | -81.45333 |
| Lake Cardinal Dam | Ashtabula | 41.61667 | -80.89167 |
| Lake Cast-A-Line Dam | Clermont | 39.245 | -84.25833 |
| Lake Cha-Vel Dam | Columbiana | 40.66667 | -80.685 |
| Lake Chateau Dam | Medina | 41.21333 | -81.845 |
| Lake Choctaw Dam | Madison | 39.965 | -83.47833 |
| Lake Cohasset Dam | Mahoning | 41.08167 | -80.68167 |
| Lake Copeland Dam | Columbiana | 40.86833 | -80.72833 |
| Lake Daugherty Upground Reservoir Dam | Hancock | 41.145 | -83.42833 |
| Lake Dorothy Dam | Summit | 41.01667 | -81.62667 |
| Lake Eagle Claw Dam | Hocking | 39.65333 | -82.455 |
| Lake Erie Girl Scout Lake Dam | Lake | 41.67833 | -81.12333 |
| Lake Fichtelberg Dam | Brown | 39.20333 | -83.965 |
| Lake Forest Dam | Lawrence | 38.54333 | -82.45667 |
| Lake Frasure Dam | Scioto | 38.92167 | -83.04833 |
| Lake George Dam | Ashtabula | 41.74 | -80.885 |
| Lake Girard Dam | Trumbull | 41.19333 | -80.69667 |
| Lake Glacier Dam | Mahoning | 41.09833 | -80.675 |
| Lake Greenbriar Dam | Tuscarawas | 40.32167 | -81.475 |
| Lake Hamilton Dam | Mahoning | 41.03667 | -80.59167 |
| Lake Haven Estates Dam | Lorain | 41.425 | -82.29833 |
| Lake Hill Dam | Ross | 39.385 | -83.15167 |
| Lake Hope Dam | Vinton | 39.32 | -82.35667 |
| Lake Katharine Dam | Jackson | 39.085 | -82.675 |
| Lake La Su An Dam | Williams | 41.68833 | -84.69 |
| Lake Lakengren Dam | Preble | 39.675 | -84.68667 |
| Lake Lamberjack Upground Reservoir Dam | Hancock | 41.15833 | -83.43667 |
| Lake Litchfield Dam | Summit | 41.23167 | -81.535 |
| Lake Logan Dam | Hocking | 39.535 | -82.45167 |
| Lake Loramie Dam | Shelby | 40.3625 | -84.3625 |
| Lake Lorelei Dam | Brown | 39.17667 | -83.975 |
| Lake Louise Dam | Geauga | 41.42833 | -81.31833 |
| Lake Lucerne Dam | Geauga | 41.39833 | -81.34667 |
| Lake Margaret Dam | Scioto | 38.865 | -82.98333 |
| Lake Maria Dam | Richland | 40.675 | -82.53 |
| Lake Marinole Dam | Montgomery | 39.67167 | -84.16 |
| Lake Medina Dam | Medina | 41.14 | -81.82167 |
| Lake Mohawk Dam | Carroll | 40.67389 | -81.19444 |
| Lake Mosier Upground Reservoir Dam | Hancock | 41.14167 | -83.42667 |
| Lake Mottram Upground Reservoir Dam | Hancock | 41.15833 | -83.43 |
| Lake Noah Dam | Summit | 40.91333 | -81.515 |
| Lake O'Springs Dam | Stark | 40.87 | -81.455 |
| Lake of Four Seasons Dam | Hocking | 39.64833 | -82.47333 |
| Lake of the Woods Dam | Highland | 39.09667 | -83.56 |
| Lake Otto Dam | Licking | 40.20167 | -82.25167 |
| Lake P'na Dam | Columbiana | 40.79667 | -80.99167 |
| Lake Park Dam | Mahoning | 40.91167 | -81.065 |
| Lake Peniel Dam | Morrow | 40.46333 | -82.70833 |
| Lake Placentia Dam | Columbiana | 40.85333 | -80.99333 |
| Lake Placid Dam | Mahoning | 40.96667 | -80.71 |
| Lake Rockwell Dam | Portage | 41.18333 | -81.33167 |
| Lake Romona Dam | Fairfield | 39.6 | -82.635 |
| Lake Rupert Dam | Vinton | 39.175 | -82.52167 |
| Lake Samary Dam | Columbiana | 40.66333 | -80.63667 |
| Lake Seneca Dam | Williams | 41.665 | -84.63667 |
| Lake Sylvan Dam | Clark | 39.935 | -83.59333 |
| Lake Tomahawk Dam | Columbiana | 40.76 | -80.57 |
| Lake Vesuvius Dam | Lawrence | 38.60667 | -82.63 |
| Lake Viering Dam | Knox | 40.53167 | -82.37 |
| Lake Wapusun Dam | Wayne | 40.71167 | -82.105 |
| Lake Waynoka Dam | Brown | 38.93167 | -83.79667 |
| Lake Waynoka Retention Dam | Brown | 38.94167 | -83.805 |
| Lake Waynoka Upground Reservoir Dam | Brown | 38.93667 | -83.8 |
| Lake White Dam | Pike | 39.10667 | -83.00833 |
| Lakeside Motel Pond Dam | Washington | 39.555 | -81.61333 |
| Lambert Pond Dam | Meigs | 39.10333 | -82.15833 |
| Lampson Reservoir Dam | Ashtabula | 41.75167 | -80.79667 |
| Lance Lake Dam | Ashland | 40.94 | -82.28333 |
| Landen Farm Dam | Warren | 39.32167 | -84.27167 |
| Lankamer Lake Dam | Vinton | 39.22 | -82.52167 |
| Larry Peairs Memorial Lake Dam | Geauga | 41.44333 | -81.055 |
| Lawco Lake Dam | Lawrence | 38.64667 | -82.68833 |
| Lawrence Pond Dam | Hamilton | 39.205 | -84.31 |
| Laycocks Farm Pond Dam Number One | Adams | 38.91333 | -83.48333 |
| Laycocks Farm Pond Dam Number Two | Adams | 38.91667 | -83.49 |
| Ledge Lake Dam | Medina | 41.205 | -81.725 |
| Leesville Dam | Fairfield | 40.46833 | -81.195 |
| Leipsic Upground Reservoir Dam | Putnam | 41.10667 | -83.92833 |
| Liberty Lake Dam | Trumbull | 41.185 | -80.705 |
| Liggett Lake Dam | Union | 40.25667 | -83.53 |
| Lilley Lake 9341-006 Dam | Warren | 39.39167 | -84.14667 |
| Lilley Lake Dam | Warren | 39.385 | -84.13333 |
| Lima Upground Reservoir Dam | Allen | 40.75667 | -84.04833 |
| Limpert Lake Dam | Ashtabula | 41.50833 | -80.71833 |
| Little Lake in the Woods Dam | Carroll | 40.55833 | -81.17667 |
| Livezey Lake Dam | Belmont | 39.985 | -81.15 |
| Lock and Dam Number 10 (historical) | Jefferson | 40.38111 | -80.61528 |
| Lock and Dam Number 11 (historical) | Jefferson | 40.24556 | -80.65 |
| Lock and Dam Number 13 (historical) | Belmont | 39.98917 | -80.7375 |
| Lock and Dam Number 15 (historical) | Monroe | 39.62917 | -80.87306 |
| Lock and Dam Number 18 (historical) | Washington | 39.33472 | -81.5575 |
| Lock and Dam Number 19 (historical) | Washington | 39.25611 | -81.69444 |
| Lock and Dam Number 20 (historical) | Meigs | 39.1375 | -81.74306 |
| Lock and Dam Number 21 (historical) | Meigs | 39.02417 | -81.76806 |
| Lock and Dam Number 22 (historical) | Meigs | 38.94167 | -81.76111 |
| Lock and Dam Number 23 (historical) | Meigs | 38.88444 | -81.86639 |
| Lock and Dam Number 24 (historical) | Meigs | 38.97861 | -81.92944 |
| Lock and Dam Number 25 (historical) | Gallia | 38.905 | -82.1325 |
| Lock and Dam Number 26 (historical) | Gallia | 38.69278 | -82.18611 |
| Lock and Dam Number 27 (historical) | Lawrence | 38.45056 | -82.32028 |
| Lock and Dam Number 28 (historical) | Lawrence | 38.41111 | -82.50056 |
| Lock and Dam Number 29 (historical) | Lawrence | 38.45583 | -82.60611 |
| Lock and Dam Number 30 (historical) | Scioto | 38.62417 | -82.85833 |
| Lock and Dam Number 31 (historical) | Scioto | 38.70056 | -83.04611 |
| Lock and Dam Number 32 (historical) | Adams | 38.655 | -83.36333 |
| Lock and Dam Number 37 (historical) | Hamilton | 39.11778 | -84.70417 |
| Lock and Dam Number 8 (historical) | Belmont | 40.105 | -80.70583 |
| Lock and Dam Number 9 (historical) | Jefferson | 40.5025 | -80.61583 |
| Lock Fifteen | Monroe | 39.62833 | -80.87556 |
| Lock Number 14 | Auglaize | 40.60056 | -84.36972 |
| Lock Number 2 | Washington | 39.47056 | -81.49111 |
| Lock Number 44 | Lucas | 41.41528 | -83.86194 |
| Lockington Dam | Shelby | 40.21389 | -84.24472 |
| Lockington Locks | Shelby | 40.20417 | -84.23861 |
| Lonesome Lock (historical) | Summit | ||
| Long Lake Dam | Summit | 41.02167 | -81.55 |
| Longs Retreat Dam | Pike | 39.08833 | -83.31667 |
| Loretta Lake Dam | Lorain | 41.07167 | -82.19333 |
| Lost Creek Upground Reservoir Dam | Allen | 40.74167 | -84.06667 |
| Lower Hickory Hills Lake Dam | Meigs | 39.16667 | -81.86333 |
| Lower Reservoir Bottom Ash Dam | Washington | 39.585 | -81.69 |
| Lower Shaker Lake Dam | Cuyahoga | 41.49 | -81.58333 |
| Lower Woodsfield Reservoir Dam | Monroe | 39.79 | -81.115 |
| Loyal Oak Lake Dam | Summit | 41.06 | -81.66833 |
| Luburgh Lake Dam | Guernsey | 39.99667 | -81.63833 |
| Mader Pond Dam | Harrison | 40.38 | -80.875 |
| Madison Lake Dam | Madison | 39.86583 | -83.37583 |
| Mahoning Duck Hunters Club Pond Dam | Mahoning | 40.97333 | -80.68333 |
| Malabu Lake Dam | Jefferson | 40.27333 | -80.75 |
| Manfull Lake Dam | Columbiana | 40.73333 | -80.94333 |
| Maple Leaf Lake Dam | Stark | 40.76 | -81.19167 |
| Margaret Creek Watershed Project Number One Dam | Athens | 39.22667 | -82.175 |
| Marks Lake Dam | Ashland | 40.99667 | -82.41 |
| Marquette Cement Company Dam Number One | Lawrence | 38.67667 | -82.68 |
| Marsh Pond Dam | Tuscarawas | 40.40167 | -81.53667 |
| Mathews Pond Dam | Noble | 39.83 | -81.55 |
| Matters Pond Dam | Athens | 39.34167 | -82.12333 |
| McClintock Lake Dam | Allen | 40.72 | -84.15667 |
| McComb Upground Reservoir Number One Dam | Hancock | 41.10667 | -83.78333 |
| McComb Upground Reservoir Number Two Dam | Hancock | 41.105 | -83.77667 |
| McGill Pond Dam | Fairfield | 39.86833 | -82.74667 |
| McKelvey Lake Dam | Mahoning | 41.105 | -80.595 |
| McKnight Lake Dam | Medina | 41.07667 | -81.97167 |
| Mead Foremens Club Pond Dam | Ross | 39.19667 | -82.99 |
| Meadowbrook Lake Dam | Summit | 41.20167 | -81.455 |
| Meigs Mine Number One Water Supply Dam | Meigs | 39.06833 | -82.23833 |
| Memory Lanes Park Lake Dam | Fairfield | 39.81167 | -82.43333 |
| Metzger Upground Reservoir Dam | Allen | 40.675 | -84.05 |
| Miami Whitewater Forest Dam | Hamilton | 39.26 | -84.74667 |
| Miamiview Golf Course Pond Dam Number One | Hamilton | 39.21167 | -84.71667 |
| Miamiview Golf Course Pond Dam Number Two | Hamilton | 39.21333 | -84.71333 |
| Michael J Kirwan Dam | Portage | 41.15556 | -81.075 |
| Mid-Western Childrens Home Dam | Warren | 39.28 | -84.135 |
| Middle Reservoir Fly Ash Dam | Washington | 39.58333 | -81.69 |
| Middletown Dam | Warren | 39.54167 | -84.36333 |
| Middletown Park District Lake Dam | Butler | 39.52333 | -82.455 |
| Middletown Sportsmen Club Dam | Butler | 39.53667 | -84.425 |
| Miller Lake Dam | Hancock | 41.045 | -83.8 |
| Milton Dam | Mahoning | 41.1275 | -80.9775 |
| Mineral Ridge Dam | Trumbull | 41.15333 | -80.77944 |
| Mineral Springs Lake Dam | Adams | 38.92833 | -83.36833 |
| Mints Pine Acres Lake Dam | Columbiana | 40.8 | -80.64333 |
| Miranda Pond Dam | Medina | 41.16 | -81.80333 |
| Mirror Lake Dam | Medina | 41.13667 | -81.71667 |
| Modern Tool and Die Company Reservoir Dam | Medina | 41.255 | -81.895 |
| Modoc Reservoir Dam | Athens | 39.47833 | -82.13333 |
| Moe Pond Dam | Fairfield | 39.73333 | -82.735 |
| Mogadore Dam | Portage | 41.05694 | -81.38 |
| Mohawk Dam | Coshocton | 40.35167 | -82.09 |
| Mohawk Lake Dam | Seneca | 41.065 | -83.17167 |
| Mohican Trail Camp Lake Dam | Richland | 40.65167 | -82.37333 |
| Mohicanville Dam | Ashland | 40.72417 | -82.15194 |
| Moll Lake Dam | Medina | 41.26167 | -81.905 |
| Monroe Lake Dam | Monroe | 39.81833 | -81.13833 |
| Monroeville Low Head Dam | Huron | 41.24167 | -82.695 |
| Montmere Lake Dam | Geauga | 41.63667 | -81.005 |
| Montville Lakes Dam 1016-001 | Medina | 41.10667 | -81.8 |
| Montville Lakes Dam 1016-008 | Medina | 41.10667 | -81.79833 |
| Moore Lake Dam | Coshocton | 40.16167 | -82.025 |
| Moore Pond Dam | Fairfield | 39.92333 | -82.745 |
| Morse Pond Dam | Fairfield | 39.77167 | -82.74833 |
| Mosquito Creek Dam | Trumbull | 41.3 | -80.75694 |
| Mount Gilead Lower Lake Dam | Morrow | 40.55 | -82.81667 |
| Mount Gilead Upper Lake Dam | Morrow | 40.55 | -82.81167 |
| Mount Orab Upground Reservoir Dam | Brown | 39.03 | -83.92167 |
| Mowrer Lake Dam | Wayne | 40.87333 | -82.01167 |
| Muddy Lake Dam | Portage | 41.13833 | -81.29 |
| Mullberry Hills Pond Dam | Clermont | 39.21 | -84.25167 |
| Murphy Pond Dam | Warren | 39.395 | -84.07667 |
| Muskingum River Fly Ash Dam | Washington | 39.57667 | -81.68167 |
| Muskingum River Lock and Dam Number 10 | Muskingum | 39.94167 | -82.01333 |
| Muskingum River Lock and Dam Number 11 | Muskingum | 40.04333 | -81.97833 |
| Muskingum River Lock and Dam Number Eight | Morgan | 39.73333 | -81.90833 |
| Muskingum River Lock and Dam Number Five | Washington | 39.53667 | -81.72167 |
| Muskingum River Lock and Dam Number Four | Washington | 39.555 | -81.64667 |
| Muskingum River Lock and Dam Number Nine | Muskingum | 39.87 | -81.91 |
| Muskingum River Lock and Dam Number Seven | Morgan | 39.64167 | -81.85 |
| Muskingum River Lock and Dam Number Six | Morgan | 39.54667 | -81.78833 |
| Muskingum River Lock and Dam Number Three | Washington | 39.53 | -81.51667 |
| Muskingum River Lock and Dam Number Two | Washington | 39.47 | -81.49167 |
| Mystic Lake Dam | Preble | 39.65833 | -84.64667 |
| Nacco Slurry Refuse Disposal Dam | Belmont | 39.91833 | -80.99333 |
| Nashport Dike | Muskingum | 40.075 | -82.15639 |
| New Concord Village Reservoir Dam | Muskingum | 40.00667 | -81.75333 |
| New Cumberland Lock and Dam | Jefferson | 40.5275 | -80.62722 |
| New Lexington Reservoir Dam | Perry | 39.73333 | -82.215 |
| New London Upground Reservoir Dam | Huron | 41.07 | -82.42667 |
| New Slag Tailings Pond Dike Dam | Washington | 39.365 | -81.525 |
| New Washington Upground Reservoir Dam | Crawford | 40.95167 | -82.86 |
| New York Central Reservoir Dam | Perry | 39.58667 | -82.07167 |
| Newark Low Head Dam | Licking | 40.08833 | -82.41167 |
| Newport Lake Dam | Mahoning | 41.065 | -80.67833 |
| Newton Falls Dam | Trumbull | 41.19667 | -80.96667 |
| Nimisila Reservoir Dam | Summit | 40.92667 | -81.325 |
| Nobles Paradise Lake Dam | Gallia | 38.685 | -82.32 |
| North Baltimore Upground Reservoir Dam | Wood | 41.16833 | -83.66667 |
| North Branch of Kokosing Dam | Knox | 40.50667 | -82.57667 |
| North Industry Sportsmans Club Dam | Stark | 40.69833 | -81.455 |
| North Reservoir Dam | Summit | 41.00833 | -81.54333 |
| Norwalk Lower Reservoir Dam | Huron | 41.23333 | -82.59 |
| Norwalk Memorial Reservoir Dam | Huron | 41.235 | -82.59 |
| Norwalk Upper Reservoir Dam | Huron | 41.23333 | -82.58333 |
| Nova Pond Dam | Ashland | 41.03333 | -82.285 |
| O H Hutchings Station Dam | Montgomery | 39.60833 | -84.28667 |
| O'Shaughnessy Dam | Delaware | 40.15389 | -83.12583 |
| Oak Hill Upground Reservoir Dam | Jackson | 38.93333 | -82.57833 |
| Oberlin Reservoir Dam | Lorain | 41.28333 | -82.23667 |
| Oberlin Upground Reservoir Dam | Lorain | 41.275 | -82.17833 |
| Ockenga Pond Dam | Huron | 41.23833 | -82.37667 |
| Oeder Lake Dam | Warren | 39.34833 | -84.18333 |
| Ohio Farmettes Lake Dam | Portage | 41.12 | -81.24 |
| Ohio Power Company Dam 9515-001 | Morgan | 39.73333 | -81.73333 |
| Ohio Power Company Dam 9515-002 | Morgan | 39.735 | -81.72667 |
| Ohio Power Company Dam 9515-004 | Morgan | 39.73333 | -81.72167 |
| Ohio Power Company Dam 9515-007 | Morgan | 39.70333 | -84.20333 |
| Ohio Power Company Dam 9515-011 | Morgan | 39.68833 | -81.69667 |
| Ohio Power Company Dam Number Four Dam | Muskingum | 39.85 | -81.735 |
| Ohio Power Company Dam Number Three | Muskingum | 39.255 | -81.725 |
| Ohio Power Company Dam Number Two Dam | Muskingum | 39.84833 | -81.72 |
| Ohio Power Company Pond 9515-013 Dam | Morgan | 39.675 | -81.71833 |
| Ohio Power Company Pond 9515-018 Dam | Morgan | 39.73667 | -81.74167 |
| Ohio Power Company Pond 9515-019 Dam | Morgan | 39.745 | -81.74833 |
| Ohio Power Company Pond 9515-021 Dam | Morgan | 39.66667 | -81.74333 |
| Ohio Power Company Pond 9516-010 Dam | Morgan | 39.715 | -81.765 |
| Ohio Power Company Pond 9615-010 Dam | Muskingum | 39.83667 | -81.73333 |
| Ohio Power Company Pond 9615-014 Dam | Muskingum | 39.775 | -81.72167 |
| Ohio Power Company Pond 9615-020 Dam | Perry | 39.755 | -81.67667 |
| Ohio Power Company Pond 9615-022 Dam | Muskingum | 39.845 | -81.71167 |
| Ohio Power Company Pond Mb-118 Dam | Morgan | 39.745 | -81.80833 |
| Ohio Power Company Pond Mb-120 Dam | Morgan | 39.74167 | -81.80333 |
| Ohio Power Company Pond Mb-133 Dam | Morgan | 39.71167 | -81.805 |
| Ohio Power Company Pond Mb-141 Dam | Morgan | 39.72 | -81.77667 |
| Ohio Power Company Pond Mb-144 Dam | Morgan | 39.71667 | -81.77167 |
| Ohio Power Company Pond Mb-165 Dam | Morgan | 39.72833 | -81.715 |
| Ohio Power Company Pond Mb-166 Dam | Morgan | 39.71667 | -81.71667 |
| Ohio Power Company Pond Mb-46 Dam | Morgan | 39.75 | -81.69833 |
| Ohio Power Company Pond Mbl-1 Dam | Morgan | 39.74333 | -81.81667 |
| Ohio Power Company Pond Mm-29 Dam | Morgan | 39.71833 | -81.68333 |
| Ohio Power Company Pond Mm-34 Dam | Morgan | 39.73 | -81.67667 |
| Ohio Power Company Pond Mm-46 Dam | Morgan | 39.75167 | -81.695 |
| Ohio Power Company Pond Mm-49 Dam | Morgan | 39.70167 | -81.70167 |
| Ohio Power Company Pond Mm-52 Dam | Morgan | 39.73333 | -81.665 |
| Ohio Power Company Pond Mm-62 Dam | Morgan | 39.75167 | -81.66833 |
| Ohio Power Company Pond Mm-85 Dam | Morgan | 39.75 | -81.69167 |
| Ohio Power Company Pond Mmv-5 Dam | Morgan | 39.665 | -81.71833 |
| Ohio Power Company Pond Mmv-9 Dam | Morgan | 39.66167 | -81.73833 |
| Ohio Power Company Pond Mum-40 Dam | Muskingum | 39.76833 | -81.72167 |
| Ohio Power Company Pond Mum-48 Dam | Muskingum | 39.80667 | -81.70667 |
| Ohio Power Company Pond Mum-87 Dam | Muskingum | 39.835 | -81.74167 |
| Ohio Power Company Pond Mum-90 Dam | Muskingum | 39.83833 | -81.74 |
| Ohio Power Company Pond Mum-91 Dam | Muskingum | 39.75833 | -81.71 |
| Ohio Power Company Pond Mum-92 Dam | Muskingum | 39.76667 | -81.71 |
| Ohio Power Company Pond Mur-12 Dam | Muskingum | 39.87333 | -81.72333 |
| Ohio Power Company Pond Mur-27 Dam | Muskingum | 39.84333 | -81.73667 |
| Ohio Power Company Pond Mur-3 Dam | Muskingum | 39.92 | -81.72167 |
| Ohio Power Company Pond Mur-31 Dam | Muskingum | 39.84833 | -81.72833 |
| Ohio Power Company Pond Mur-32 Dam | Muskingum | 39.855 | -82.73333 |
| Ohio Power Company Pond Mur-4 Dam | Muskingum | 39.88333 | -81.73833 |
| Ohio Power Company Pond Nb-102 Dam | Noble | 39.77333 | -81.69 |
| Ohio Power Company Pond Nb-171 Dam | Noble | 39.80833 | -81.63167 |
| Ohio Power Company Pond Nb-176 Dam | Noble | 39.81167 | -81.63667 |
| Ohio Power Company Pond Nb-40 Dam | Noble | 39.76833 | -81.65167 |
| Ohio Power Company Pond Nb-43 Dam | Noble | 39.77167 | -81.645 |
| Ohio Power Company Pond Nb-64 Dam | Noble | 39.775 | -81.63333 |
| Ohio Power Company Pond Nb-90 Dam | Noble | 39.76167 | -81.67167 |
| Ohio Power Company Pond Nb-93 Dam | Noble | 39.76667 | -81.67833 |
| Ohio Power Company Pond Nb-99 Dam | Noble | 39.77 | -81.685 |
| Ohio Power Company Pond Number 9515-012 Dam | Morgan | 39.68167 | -81.71167 |
| Ohio Power Company Pond Number 9515-025 Dam | Morgan | 39.70333 | -81.73 |
| Ohio State University Golf Course Lake Dam | Franklin | 40.035 | -83.05667 |
| Ohnoname 10 Dam | Stark | 40.87833 | -81.56333 |
| Ohnoname 15 Dam | Geauga | 41.44167 | -81.27667 |
| Ohnoname 16 Dam | Geauga | 41.47333 | -81.38 |
| Ohnoname 19 Dam | Montgomery | 39.86667 | -84.19333 |
| Ohnoname 20 Dam | Jackson | 39.06167 | -82.51 |
| Ohnoname 21 Dam | Jackson | 39.06167 | -82.51667 |
| Ohnoname 22 Dam | Jackson | 39.07 | -82.51333 |
| Ohnoname 28 Dam | Portage | 41.31167 | -81.10333 |
| Ohnoname 31 Dam | Belmont | 40.12667 | -81.08667 |
| Old Stage Farms Lake Dam | Warren | 39.54833 | -84.13333 |
| Osage Lake Dam | Medina | 41.06333 | -81.775 |
| Ottawa Upground Reservoir Dam | Putnam | 41.01333 | -84.02 |
| Owen Pond Dam | Geauga | 41.37167 | -81.04 |
| Oxbow Lake Dam | Defiance | 41.34333 | -84.44167 |
| P E Grubb Lake Dam | Licking | 40.22833 | -82.67833 |
| Pabst Lake Dam | Crawford | 40.80333 | -82.80833 |
| Paint Creek Dam | Highland | 39.25167 | -83.35 |
| Pancake Lake Dam | Summit | 40.94333 | -81.62167 |
| Pancake Lock (historical) | Summit | 41.18778 | -81.57972 |
| Paradise Lake Dam | Columbiana | 40.80167 | -80.99167 |
| Paradise Lakes-North Lake Dam | Preble | 39.61 | -84.50833 |
| Paradise Lakes-South Lake Dam | Preble | 39.61 | -84.50833 |
| Paulding Upground Reservoir Dam | Paulding | 41.12 | -84.58833 |
| Paw Paw Lake Dam | Geauga | 41.435 | -81.31833 |
| Payne Lake Dam | Lawrence | 38.69833 | -82.48167 |
| Peabody Broken Aro Water Supply Dam | Coshocton | 40.21 | -81.955 |
| Peabody Coal Company Dam 0117-012 | Coshocton | 40.22833 | -81.94667 |
| Peabody Coal Company Dam 0117-013 Dam | Coshocton | 40.23667 | -81.94333 |
| Peabody Coal Company Pond 0115-011 Dam | Muskingum | 40.14833 | -81.74333 |
| Perry Fish and Game Association Pond Dam | Perry | 39.76333 | -82.245 |
| Perry Reclaim Dam One | Perry | 39.77167 | -82.18333 |
| Perry Reclaim Dam Three | Perry | 39.77167 | -82.205 |
| Perry Reclaim Dam Two | Perry | 39.76167 | -82.23167 |
| Peterson Pond Dam | Columbiana | 40.81 | -80.66167 |
| Piedmont Dam | Harrison | 40.18972 | -81.21333 |
| Pike Island Lock And Dam | Belmont | 40.15111 | -80.70556 |
| Pike Lake Dam | Pike | 39.16 | -83.21833 |
| Pine Creek Structure Number Eight Dam | Lawrence | 38.60667 | -82.71333 |
| Pine Hill Lake Dam | Warren | 39.355 | -84.305 |
| Pine Lake Dam | Mahoning | 40.92833 | -80.64333 |
| Pine Lake Estates Dam | Fairfield | 39.66167 | -82.59833 |
| Piney Wood Lake Dam | Warren | 39.33167 | -84.13167 |
| Piqua Low Head Dam | Miami | 40.13333 | -84.23667 |
| Pischieri Pond Dam | Medina | 41.24167 | -81.73333 |
| Pittman Lake Dam | Portage | 41.20333 | -81.27667 |
| Pleasant Hill Dam | Ashland | 40.62306 | -82.32444 |
| Pleasant Valley Dike | Muskingum | 40.03139 | -82.07806 |
| Plymouth Waste Treatment Pond Dam | Huron | 41.015 | -82.67167 |
| Pomeroy Ponds Dam | Delaware | 40.24167 | -82.95167 |
| Ponderosa Pines Lake Dam | Lorain | 41.205 | -82.15667 |
| Poore Pond Dam | Warren | 39.51667 | -84.10167 |
| Porter Lake Dam | Muskingum | 39.96 | -82.18167 |
| Porter Pond Dam | Meigs | 38.98667 | -81.87 |
| Postelwaite Lake Dam | Licking | 40.04667 | -82.62167 |
| Powers Upground Reservoir Dam | Crawford | 40.72 | -82.80333 |
| Pride Valley Beach Club Dam | Carroll | 40.70833 | -81.17 |
| Pschesang Lake Dam | Brown | 39.20833 | -83.91667 |
| Pulay Pond Dam | Harrison | 40.23333 | -81.06 |
| Puskarich Brothers Lake Dam | Carroll | 40.55 | -81.00167 |
| Quail Hollow Lake Dam | Lake | 41.67333 | -81.23667 |
| Quarto Mine Number Four Dam Number Five | Monroe | 39.79 | -80.84 |
| Quarto Mine Number Four Dam Number Four | Monroe | 39.79167 | -80.83833 |
| Quarto Mine Number Four Dam Number One | Monroe | 39.79667 | -80.83167 |
| Quarto Mine Number Four Dam Number Three | Monroe | 39.79333 | -80.83667 |
| Quarto Mine Number Four Dam Number Two | Monroe | 39.795 | -80.83333 |
| Quarto Number Seven Slurry Impoundment Three Dam | Monroe | 39.72 | -80.88 |
| R and F Coal Fresh Water Dam | Belmont | 40.025 | -80.96333 |
| Raccoon Creek Upground Reservoir Dam | Sandusky | 41.28833 | -82.97667 |
| Rainbow Lake Dam | Athens | 39.225 | -82.07667 |
| Rawiga Country Club Lake Dam | Medina | 40.98833 | -81.81167 |
| Red Lock (historical) | Summit | ||
| Refinery Reservoir Dam | Allen | 40.72 | -84.13333 |
| Reuschling Pond Dam | Ashtabula | 41.66 | -80.76833 |
| Rice Pond Dam | Medina | 41.14 | -81.94333 |
| Rich Street Low Head Dam | Franklin | 39.95833 | -83.00667 |
| Riley Reservoir Dam | Crawford | 40.82667 | -82.93333 |
| Rio Grande Reservoir Dam | Gallia | 38.88333 | -82.39 |
| Rippe Pond Dam | Warren | 39.31167 | -84.245 |
| Roaming Rock Shores Lake Dam | Ashtabula | 41.655 | -80.84 |
| Robins Ridge Golf Club Dam Number One | Guernsey | 39.93833 | -81.44167 |
| Robins Ridge Golf Club Dam Number Two | Guernsey | 39.94167 | -81.43833 |
| Rock Island Lake Dam | Mahoning | 41.07167 | -80.62833 |
| Rocky Fork Lake Dam | Highland | 39.18444 | -83.43972 |
| Rod Lake Dam | Jefferson | 40.53667 | -80.84167 |
| Rohrs Lake Dam | Ashland | 41.02 | -82.33667 |
| Roosevelt Lake Dam | Scioto | 38.72667 | -83.175 |
| Ross Lake Dam | Ross | 39.335 | -82.905 |
| Royal Oak Lake Dam | Meigs | 39.04 | -81.95333 |
| Rush Creek Conservancy Structure 1B Dam | Perry | 39.74667 | -82.23167 |
| Rush Creek Conservation District Structure 5a Dam | Fairfield | 39.73667 | -82.37333 |
| Rush Creek Conservation District Structure 5b Dam | Fairfield | 39.73833 | -82.39167 |
| Rush Creek Conservation District Structure 5c Dam | Fairfield | 39.74 | -82.41 |
| Rush Creek Conservation District Structure 6d Dam | Fairfield | 39.80833 | -82.44833 |
| Rush Creek Conservation District Structure 7d Dam | Fairfield | 39.7 | -82.50833 |
| Rush Creek Conservation District Structure 7e Dam | Fairfield | 39.68667 | -82.48167 |
| Rush Creek Structure 3a Dam | Perry | 39.75167 | -82.31667 |
| Rush Creek Structure 3b Dam | Perry | 39.75333 | -82.33333 |
| Rush Creek Watershed Structure VI-D Dam | Fairfield | 39.80833 | -82.44833 |
| Rush Run Lake Dam | Preble | 39.59333 | -84.61333 |
| Russellville Watersupply Reservoir Dam | Brown | 38.88667 | -83.78167 |
| Rustic Acres Lake Dam | Ross | 39.41833 | -83.05333 |
| Rustic Hills Lake Dam | Medina | 41.13 | -81.80833 |
| Rustic Lake Dam | Lorain | 41.07167 | -82.19833 |
| Rutledge Lake Dam | Tuscarawas | 40.48833 | -81.41667 |
| Saalfield Pond Dam Number One | Summit | 41.22833 | -81.57167 |
| Saint John Vianney Seminary Dam | Jefferson | 40.38667 | -80.81167 |
| Salem Reservoir East Embankment Dam | Columbiana | 40.81333 | -80.83667 |
| Salem Reservoir South Embankment Dam | Columbiana | 40.80833 | -80.835 |
| Salem Reservoir West Embankment Dam | Columbiana | 40.81167 | -80.845 |
| Sally Buffalo Park Dam | Harrison | 40.25833 | -81.005 |
| Sally Buffalo Park Dam Number Two | Harrison | 40.26 | -81.01167 |
| Salt Fork Reservoir Dam | Guernsey | 40.105 | -81.55667 |
| Salt Fort Dam | Guernsey | 40.105 | -81.55583 |
| San Toy Dam | Perry | 39.63667 | -82.03833 |
| Sardinia Reservoir Dam | Brown | 39.01667 | -83.80833 |
| Schafer Lake Dam | Noble | 39.735 | -81.48 |
| Schaney Pond Dam | Harrison | 40.31667 | -80.95 |
| Schneider Lake Dam | Ashland | 40.56833 | -82.31333 |
| Schultz Lake Dam | Portage | 41.01833 | -81.19 |
| Scio Pottery Pond Dam | Harrison | 40.4 | -81.1 |
| Scioto Hills Baptist Camp Lake Dam | Scioto | 38.77833 | -82.75833 |
| Seimer Pond Dam | Perry | 39.6 | -82.07167 |
| Seleski Pond Dam | Harrison | 40.24333 | -80.935 |
| Senecaville Dam | Guernsey | 39.925 | -81.43556 |
| Seven Springs Lake Dam | Medina | 41.12333 | -81.80833 |
| Shadow Lake Dam | Warren | 39.4 | -84.31667 |
| Shaker Creek Dam | Warren | 39.45 | -84.29333 |
| Shangri-La Ski Club Dam | Geauga | 41.37 | -81.06667 |
| Sharon Lake Dam | Hamilton | 39.28167 | -84.39 |
| Sharonville Retention Dam | Hamilton | 39.26667 | -84.4 |
| Shawnee Lake Dam | Greene | 39.645 | -83.79333 |
| Shelby Upground Reservoir Number One Dam | Richland | 40.86833 | -82.66 |
| Shelby Upground Reservoir Number Two Dam | Richland | 40.86833 | -82.655 |
| Shelton Lake Dam | Perry | 39.89667 | -82.465 |
| Sherwood Forrest Camp Grounds Pond Dam | Medina | 41.07 | -82.03 |
| Shreve Lake Dam | Wayne | 40.68333 | -82.04333 |
| Shroder Lake Dam | Warren | 39.41667 | -84.27167 |
| Sickles Pond Dam | Jackson | 39.04333 | -82.58 |
| Siedel Lake Dam | Medina | 41.09667 | -81.80667 |
| Silver Creek Dam | Madison | 39.96667 | -83.24833 |
| Sixmile Dam | Coshocton | 40.3275 | -81.96528 |
| Skidmore Lake Dam | Ashtabula | 41.65833 | -80.79833 |
| Slater Brothers Pond Dam | Athens | 39.35333 | -82.12 |
| Slates Dam | Columbiana | 40.75833 | -80.90167 |
| Slyman Lake Dam | Ashland | 40.96167 | -82.26 |
| Smith Pond Dam | Carroll | 40.55333 | -81.09833 |
| Smithfield Lions Club Lake Dam | Jefferson | 40.28167 | -80.815 |
| Snortin Ridge Farm Lake Dam | Fairfield | 39.57167 | -82.63 |
| Somerset Reservoir Dam | Perry | 39.78333 | -82.29167 |
| South Webster Reservoir Dam | Scioto | 38.82333 | -82.74167 |
| Southern Silica Pond Number One Dam | Ross | 39.17333 | -82.80167 |
| Southern Silica Pond Number Two Dam | Ross | 39.17333 | -82.79667 |
| Sparrow Reservoir Dam | Harrison | 40.27333 | -80.975 |
| Spear Pond Dam | Warren | 39.39167 | -84.18333 |
| Spencer Lake Dam | Medina | 41.10667 | -82.08 |
| Spring Lake Dam | Guernsey | 39.98667 | -81.635 |
| Spring Valley Park Lake Dam | Columbiana | 40.83833 | -80.87167 |
| Sproat Lake Dam | Vinton | 39.21 | -82.735 |
| Squaw Valley Lake Dam | Stark | 40.73333 | -81.15667 |
| Squaw Valley Park Lake Dam | Trumbull | 41.20667 | -80.67667 |
| Stanley Lake Dam 006 | Carroll | 40.445 | -81.22833 |
| Stanley Lake Dam 007 | Carroll | 40.445 | -81.235 |
| Staples Pond Dam | Huron | 41.1 | -82.48833 |
| Starkey Pond Dam | Ashland | 40.95 | -82.22333 |
| State Route 800 Dam | Belmont | 40.04333 | -81.16 |
| Steve Finlaw Lake Dam | Meigs | 38.95667 | -81.89 |
| Stevens Pond Dam | Defiance | 41.29 | -84.26167 |
| Stires Lake Dam | Monroe | 39.86167 | -81.14167 |
| Stokes Lake Dam | Clinton | 39.495 | -83.885 |
| Stolle Lake Dam | Warren | 39.53167 | -84.13333 |
| Stolle Lake Dam Number Two | Warren | 39.46667 | -84.12833 |
| Stonelick Lake Dam | Clermont | 39.21667 | -84.085 |
| Stoneybrook Farm Lake Dam | Warren | 39.525 | -84.105 |
| Stony Lake Dam | Carroll | 40.465 | -81.115 |
| Strahler Pond Dam | Washington | 39.51333 | -81.58 |
| Straits Lake Dam | Morrow | 40.535 | -82.77833 |
| Stroman Lake Dam | Champaign | 40.15167 | -83.90167 |
| Strouds Run Dam | Athens | 39.33667 | -82.01833 |
| Stuart Ash Pit Number 8 Dam | Adams | 38.635 | -83.68667 |
| Sugar Grove Lake Dam | Crawford | 40.74167 | -82.895 |
| Summitville Clay Products Lake Dam | Columbiana | 40.68333 | -80.89333 |
| Summitville Clay Works Pond Dam | Columbiana | 40.65 | -80.88333 |
| Sumner Pond Dam | Clermont | 39.13667 | -84.14333 |
| Sun Valley Lake Dam | Ross | 39.38 | -83.08667 |
| Sunbury Upground Reservoir Number One Dam | Delaware | 40.24833 | -82.855 |
| Sunbury Upground Reservoir Number Two Dam | Delaware | 40.24833 | -82.85333 |
| Sunday Creek Coal Company Dam 9420-007 Dam | Perry | 39.595 | -82.09 |
| Sunnyhill Mine Number Nine - Freshwater Dam | Perry | 39.67333 | -82.18667 |
| Sunnyslope Lake Dam | Medina | 41.095 | -81.82833 |
| Sunrise Lake Dam | Warren | 39.33167 | -84.23667 |
| Sunset Hill Estate Lake Dam | Pickaway | 39.785 | -83.17167 |
| Sunset Lake Dam | Coshocton | 40.28 | -81.92167 |
| Swanton Upground Reservoir Dam | Lucas | 41.56833 | -83.87333 |
| Swift Run Lake Dam | Miami | 40.17667 | -84.26333 |
| Switzerland Lake Dam | Belmont | 39.865 | -81.06667 |
| Syrian Shrine Oasis Lake Dam | Clermont | 39.24 | -84.25 |
| Tait Station Dam | Montgomery | 39.73 | -84.21167 |
| Tall Tinber Lake Dam | Tuscarawas | 40.50333 | -81.37 |
| Tanglewood Lake Dam | Butler | 39.36333 | -84.58167 |
| Taylor Lake Dam | Lorain | 41.06833 | -82.18333 |
| Taylorsville Dam | Montgomery | 39.87417 | -84.16222 |
| Tennessee Gas Lake Dam | Carroll | 40.62667 | -81.045 |
| The Meadows Retention Dam | Summit | 41.17333 | -81.46667 |
| Thor Lake Dam | Preble | 39.68333 | -84.695 |
| Thoreau Pond Dam | Franklin | 40.075 | -82.87 |
| Tiffin Low Head Dam 1031-007 | Seneca | 41.12333 | -83.17167 |
| Tiffin Low Head Dam 1031-008 | Seneca | 41.1 | -83.18833 |
| Timber Lake Dam | Franklin | 39.83 | -83.15833 |
| Timberline Camp Lake Dam | Richland | 40.58 | -82.585 |
| Timbre Ridge Lake Dam | Lawrence | 38.655 | -82.38167 |
| Timken Lake Dam | Stark | 40.845 | -81.49 |
| Toledo Edison Power Dam | Defiance | 41.23833 | -84.4 |
| Tom Jenkins Dam | Athens | 39.54167 | -82.05833 |
| Torok Pond Dam | Medina | 41.12833 | -81.83 |
| Trail Run Lakes Dam | Carroll | 40.525 | -81.00833 |
| Tranquil Valley Lake Dam | Holmes | 40.545 | -81.86833 |
| Trenton Sportsmen Club Lake Dam | Butler | 39.495 | -84.50667 |
| Troy Low Head Dam | Miami | 40.04 | -84.19833 |
| Tubaugh Lake Dam | Monroe | 39.675 | -80.99 |
| Tumlin Lake Dam | Hamilton | 39.18667 | -84.805 |
| Turkey Creek Lake Dam | Scioto | 38.73333 | -83.19 |
| Tuscarawas River Diversion Dam | Summit | 41.01083 | -81.51444 |
| Two Mile Dam | Butler | 39.41333 | -84.555 |
| Tycoon Lake - East Dam | Gallia | 38.93 | -82.35 |
| Tycoon Lake - South Dam | Gallia | 38.92167 | -82.35333 |
| Uke Ranch Pond Dam | Ashland | 41.05667 | -82.40833 |
| Ukranian Youth Camp Lake Dam | Lorain | 41.11833 | -82.25833 |
| Union Carbide Waste Retention Dam | Washington | 39.37833 | -81.52167 |
| Units 1-4 Bottom Ash Pond Dam | Washington | 39.58333 | -81.675 |
| Upper Hickory Hills Lake Dam | Meigs | 39.165 | -81.85833 |
| Upper Sandusky Reservoir Dam | Wyandot | 40.82 | -83.27167 |
| Upper Shaker Lake Dam | Cuyahoga | 41.48333 | -81.56 |
| Upper Wabash Number Three Pond Dam | Mercer | 40.39333 | -84.79667 |
| Upper Wabash Structure Number Two Dam | Darke | 40.36333 | -84.68333 |
| Upper Woodsfield Reservoir Dam | Monroe | 39.79667 | -81.12333 |
| Van Buren Lake Dam | Hancock | 41.13333 | -83.645 |
| Van Horn Pond Dam | Harrison | 40.285 | -81.22167 |
| Van Wert Reservoir Number One Dam | Van Wert | 40.83667 | -84.57 |
| Van Wert Reservoir Number Two Dam | Van Wert | 40.84167 | -84.57333 |
| Vandergrift Lake Dam | Stark | 40.75833 | -81.1 |
| Varian Lake Dam | Stark | 40.76167 | -81.28667 |
| Veto Lake Dam | Washington | 39.345 | -81.64667 |
| Virginia Kendall Park Lake Dam | Summit | 41.21667 | -81.52833 |
| Vo-Ash Lake Dam | Carroll | 40.48167 | -81.1 |
| Von Gunten Dam | Summit | 41.17833 | -81.66667 |
| Wagner Pond Dam | Washington | 39.445 | -81.705 |
| Wallace Lock (historical) | Summit | ||
| Warrenton Farms Dam | Clermont | 39.03333 | -84.28 |
| Washington Court House Reservoir Dam | Fayette | 39.54167 | -83.45667 |
| Wayne National Forest Dam | Perry | 39.57333 | -82.21 |
| Wayne National Forest Pond 8623-002 Dam | Gallia | 38.82167 | -82.49 |
| Welch Pond Dam | Tuscarawas | 40.31667 | -81.59333 |
| Wellington Reservoir Number Two Dam | Lorain | 41.15 | -82.24333 |
| Wellington Upground Reservoir Dam | Lorain | 41.15 | -82.23333 |
| Wellston Reservoir Dam | Jackson | 39.14 | -82.55167 |
| Wellsville Reservoir Dam | Columbiana | 40.62167 | -80.69167 |
| West Fork Dam | Hamilton | 39.25972 | -84.49528 |
| West Fork of Mill Creek Dam | Hamilton | 39.26 | -84.49667 |
| West Milton Low Head Dam | Miami | 39.97667 | -84.325 |
| West Reservoir Dam | Summit | 40.99 | -81.53833 |
| Westerville Reservoir Dam | Delaware | 40.15833 | -82.94 |
| Westville Reservoir Dam | Columbiana | 40.89167 | -81.005 |
| Westwood Lake Dam | Trumbull | 41.17833 | -80.795 |
| Whispering Pines Pond Dam | Delaware | 40.38 | -82.93167 |
| White Pond Dam | Huron | 41.14 | -82.45167 |
| Wiemeyer Pond Dam | Clermont | 39.16 | -84.18 |
| Wildlife Pond 1306-004 Dam | Trumbull | 41.42333 | -80.80833 |
| Wildlife Pond Dam 9417-001 | Morgan | 39.565 | -81.94 |
| Will-O-Bob Lake Dam | Butler | 39.53 | -84.48167 |
| Willard City Upground Reservoir Dam | Huron | 41.05667 | -82.665 |
| Willard Lake Dam | Huron | 41.11833 | -82.71667 |
| William A Harsha Lake Dam | Clermont | 38.95333 | -84.085 |
| Williams Burg Lake - East Dam | Wood | 41.445 | -83.78 |
| Williamsburg Lake - West Dam | Wood | 41.445 | -83.78 |
| Willowdale Lake Dam | Stark | 40.90333 | -81.48333 |
| Wills Creek Dam | Coshocton | 40.15611 | -81.84778 |
| Wilmington Upground Reservoir Dam Number One | Clinton | 39.41167 | -83.81 |
| Wilmington Upground Reservoir Number Two Dam | Clinton | 39.40833 | -83.80833 |
| Winandi Lake Dam | Brown | 39.23167 | -83.92167 |
| Winchester Lake Dam | Adams | 38.94667 | -83.66833 |
| Winding Creek Farms Pond Dam | Warren | 39.37 | -84.18 |
| Winding Trail Lake Dam | Medina | 41.125 | -81.805 |
| Wingfoot Lake Dam | Portage | 41.01833 | -81.37333 |
| Winterset Lake Dam | Guernsey | 40.09167 | -81.39833 |
| Wolf Creek Dam | Summit | 41.05833 | -81.61667 |
| Wolf Lakes Dam | Medina | 41.02833 | -81.91167 |
| Wolf Run Lake Dam | Noble | 39.79333 | -81.54833 |
| Wolfe Pond Dam | Pickaway | 39.64667 | -82.89 |
| Woodcreek Dam | Clermont | 39.20167 | -84.25833 |
| Woodland Lake Dam | Columbiana | 40.84 | -81.07333 |
| Yankee Lake Dam | Trumbull | 41.26667 | -80.56 |
| Yount Pond Dam | Trumbull | 41.28 | -80.78167 |
| Zepernick Lake Dam | Columbiana | 40.78667 | -80.98 |
| Ziegler Pond Dam | Hardin | 40.54167 | -83.50167 |
| Zillig Pond Dam | Hamilton | 39.23333 | -84.625 |
| Zoar Levee Diversion Dam | Tuscarawas | 40.55667 | -81.41333 |
| Zuber Pond Dam | Medina | 40.99667 | -81.785 |
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