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East entrance to the tunnel. B&O widened the tunnel for double track in 1865, but converted the entire Old Main Line to single track in 1959, to utilize higher center tunnel clearances.
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in the world that remains in active railroad use. Constructed by the
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Transportation buildings and structures in
Carroll County, Maryland
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Impossible
Challenge: The Baltimore & Ohio Railroad in Maryland
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370:B&O RR Photo Tours from Woodstock to Henryton
354:B&O RR Photo Tours from Woodstock to Henryton
275:. In 1865 the tunnel was widened to accommodate
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332:. Baltimore, MD: Barnard, Roberts.
453:. You can help Knowledge (XXG) by
400:. You can help Knowledge (XXG) by
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328:Harwood, Jr., Herbert H. (1979).
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283:portals and lining. The
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530:American tunnel stubs
82:39.3512°N 76.9128°W
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269:Baltimore and Ohio
188:430.4 ft (131.2 m)
113:Marriottsville, MD
102:CSX Transportation
53:Henryton, Maryland
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60:Coordinates
494:Categories
312:References
151:1865, 1903
73:76°54′46″W
70:39°21′04″N
180:Technical
172:Character
127:Operation
295:See also
289:concrete
261:Maryland
253:Henryton
231: in
122:Henryton
49:Location
34:Overview
226:⁄
175:Freight
164:Traffic
148:Rebuilt
135:1849-50
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285:coping
265:tunnel
198:tracks
185:Length
140:Opened
98:System
281:brick
238:Width
167:Train
156:Owner
111:Near
108:Start
451:stub
398:stub
334:ISBN
247:The
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39:Line
196:of
194:No.
159:CSX
119:End
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