Chesapeake & Ohio Railway

Big Bend Tunnel (Summers County, West Virginia)
built from 1870-1872 by C&O RR to cut off Big Bend. Legend/tradition names this tunnel as scene of 'Steel Driving Man' John Henry's race with steam drill
Original tunnel built to bypass an 8 mile long bend in the Greenbrier River. Passes between Hilldale, and Talcott West Virginia.
Intact but closed to all traffic

C&O Pipe Creek Bridge (Grant County, Indiana)
Once part of heavy duty rail line from Chicago to Cincinatti and points East. Line cut back and this section from Amboy to Marion still survives. Formely carried Amtrak's Cardinal and James Whitcomb Riley passenger trains until 1986.
Deck plate girder bridge over Pipe Creek again on Kokomo Grain/Winamac Southern Railway/US Rail Corporation(nee CSX, Chesapeake and Ohio Railroad aka Chessie System)
Open to traffic

C&O Railroad Bridge (James City County, Virginia)
Built 1932
Rainbow arch bridge over Route 601 on C&O Railroad
Open to traffic

C&O Railroad Bridge (Ross County, Ohio)
Built 1927
Concrete arch bridge over TR 288 on C&O Railroad
Open to traffic

C&O Railroad Bridge (Wayne County, Michigan)
Built 1930
Through truss bridge over Southern Avenue on C&O Railroad
Open to traffic

C&O Railroad Bridge (Hamilton County, Ohio)
Built 1929
Cantilevered through truss bridge over the Ohio River at Cincinnati
Open to railroad traffic

C&O Railroad Eel River Bridge (Cass County, Indiana)
This was once part of the Chesepeake and Ohio of Indiana Railroad's line from Chicago to Cincinnati. Supposedly one of the most photographed bridges along the C&O route, but I haven't found any evidence to support that claim.
Lost Deck plate girder bridge over Eel River on former CSX Transportation (nee Chesepeake and Ohio Railroad) in Hoover
Removed

C&O Railroad Kankakee River bridge (Starke County, Indiana)
Built 1954
Deck plate girder bridge over Kankakee River on Chesapeake and Indiana Railroad (ex-C&O, CSX Transportation) in English Lake

C&O Railroad Manistee River swing bridge (Manistee County, Michigan)
Used to access industry(Paper Mill?) on South side of bridge. Rail line is gone South of here. Has a
Deck plate girder bridge over Manistee River on Marquette Rail, Former C&O Railroad/Pere Marquette/Michigan East and West Railway line in Manistee
Open to traffic

C&O Railroad Taylor Ditch bridge (Grant County, Indiana)
Once part of heavy duty rail line from Chicago to Cincinatti and points East. Line cut back and this section from Amboy to Marion still survives. Formely carried Amtrak's Cardinal and James Whitcomb Riley passenger trains until 1986.
Timber stringer bridge over Taylor Ditch on Kokomo Grain/Winamac Southern Railway/US Rail Corporation(nee CSX, Chesapeake and Ohio Railroad aka Chessie System)
Open to traffic

C&O Railroad Twelve Mile Creek Bridge (Cass County, Indiana)
Remote bridge spanning East branch of Twelve Mile creek.
Lost Deck plate girder bridge over East Branch Twelve Mile Creek on abandoned CSX Transportation (nee Chesapeake and Ohio of Indiana Railroad) in Twelve Mile
Lost

C&O Railroad White River Bridge (Delaware County, Indiana)
Built ca.1920 by the C&O Railroad
Pony/through plate girder bridge over West Fork White River on Cardinal Greenway Trail
Open to pedestrians

C&O Wabash River bridge (Miami County, Indiana)
Part of the C&O's line from Chicago to Cincinnati, the bridge had two extreme curves on both side approaches and was removed after line was abandoned in late 80's or early 90's. Piers & abutments remain.
Lost Deck plate girder bridge over Wabash River on abandoned CSX Transportation (former Chesapeake and Ohio of Indiana Railroad) in Peru
Lost

C&O/PRR Underpass (Grant County, Indiana)
Formerly double track railroad bridge, looks like it is currently single track setup, sans rails as line has been abandoned for about 20 years or more. Scene of a C&O derailment in 1925 as well.
Abandoned pony/through girder bridge over Winamac Southern Railway owned, US Rail operated Railroad (CSXT, Chesapeake and Ohio of Indiana) Line is still in operation. on former Conrail (ex- Penn Central, Pennsylvania Railroad, "Panhandle")
Abandoned

Chesapeake & Ohio CR 419E Overpass (Delaware County, Indiana)
Built ca.1930 by the C&O RR
Timber stringer bridge over Cardinal Greenway (Former C&O RR) on CR 419E
Open to traffic

Chesapeake & Ohio Railroad Charleston Bridge (Kanawha County, West Virginia)
Built 1907
Parker through truss bridge over Kanawha River on CSX Railroad (Formerly Chesapeake & Ohio Railroad)
Intact but closed to all traffic

Chesapeake and Ohio Railroad Bridge (Fayette County, West Virginia)
Built 1899
Through truss bridge over New River on CSX Railroad
Open to traffic

Chesapeake and Ohio Railway Bridge (Mineral County, West Virginia)
Baltimore through truss bridge over North Branch Potomac River on Private Road
Open to traffic

Chesapeake and Ohio Railway Triple Crossing Viaduct (Richmond, Virginia)
Built by the C&O Railway in 1901 to link the former Richmond and Allegheny Railroad with C&O's Peninsula Subdivision to Newport News
Deck plate girder bridge over single track of CSX Transportation (mid level) and Norfolk Southern Railway (ground level) on double track of CSX Transportation (former Chesapeake and Ohio Railway) in Richmond
Open to traffic

Chessie Railroad TR 169 Bridge (Portage County, Ohio)
Built 1905
Pony truss bridge over CSX Transportation on TR 169
Open to traffic

Cranesnest bridge (Dickenson County, Virginia)
Probably replaced an earlier bridge.
Deck plate girder bridge over Cranesnest River on C&O

CSX "Big Sandy Junction" Railroad Bridge (Boyd County, Kentucky)
Warren through truss (Camelback designed) bridges over Big Sandy River on CSX Railroad
Open to traffic

CSX Doheny Drive Overpass (Wayne County, Michigan)
Built 1910
Steel stringer bridge over Doheny Drive on Railroad
Open to traffic

James River Railroad Bridge (Botetourt County, Virginia)
Abandoned pratt through truss bridge over James River on former Craig Valley Branch of the Chesapeake & Ohio Railroad
Abandoned

New River Bridge (Fayette County, West Virginia)
Built 1916; rehabilitated 1951
Through truss bridge over New River on CR 25/2 & Railroad tracks
Open to one-lane traffic

Pennsylvania Railroad Whitewater River Bridge (Wayne County, Indiana)
Unknown
Pratt deck truss bridge over Whitewater River and Sim Hodgins Parkway & Cardnal Greenway

Portland Railroad Bridge (Ionia County, Michigan)
Pratt through truss bridge over Grand River on Portland Riverwalk (formerly Chesapeake & Ohio RR)
Open to pedestrians

Spring Grove Trestle (Wayne County, Indiana)
Deck plate girder bridge over W. Branch of the East Branch of the Whitewater River on Cardinal Greenway (formally C & O Railroad)
Open to pedestrians

SS Badger, Lake Michigan Carferry Service (Manitowoc County, Wisconsin)
Built in 1952 by Christy Corporation of Sturgeon Bay, Wisconsin, Put into service 1953
Ferry across Lake Michigan on US 10
Operates daily May through October, 2 crossings Spring & Fall, 4 crossings in Summer

Turntable Bridge (Sanilac County, Michigan)
Installed 1960 by reusing a railroad turntable from Ottawa, WV to replace an older wooden structure; railroad abanded in 1991
Abandoned deck plate girder bridge over Black River on Chesapeake & Ohio RR (abandoned)
Abandoned