Baltimore and Ohio Railroad: Ladder of inclines over Boardtree Hill which allowed two carriages at a time from a full train to be shunted up an over the hill. This system operated until the Kingwood Tunnel was driven through the Alleghany Mountains. Wood

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Baltimore and Ohio Railroad: Ladder of inclines over Boardtree Hill which allowed two carriages at a time from a full train to be shunted up an over the hill. This system operated until the Kingwood Tunnel was driven through the Alleghany Mountains. Wood

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Size: 4500px × 2980px
Location:
Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No

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