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| '''Sand Patch Grade''' is a ~100 mile length of railroad track known for it's steep ]s and curves through the ] of Pennsylvania and Maryland. |
'''Sand Patch Grade''' is a ~100 mile length of railroad track known for it's steep ]s and curves through the ] of Pennsylvania and Maryland.<ref>http://www.ihavideo.com/HIedscorn1.html</ref> The line is part of the ], a ] operated by ]. A well known landmark along Sand Patch Grade is the Sand Patch Tunnel, which was constructed in the mid 1800's. The tunnels used vertical ventilation shafts with fires in them to circulate air.<ref>http://www.meyersdalepa.org/railroad/sandpatch.html</ref> In 2001, the 'SA' Tower, one of the last manned ]s was decommissioned and demolished. | ||
| ==References== | ==References== | ||
Revision as of 20:08, 13 January 2011
Sand Patch Grade is a ~100 mile length of railroad track known for it's steep grades and curves through the Allegheny Mountains of Pennsylvania and Maryland. The line is part of the Keystone Subdivision, a main line operated by CSX Transportation. A well known landmark along Sand Patch Grade is the Sand Patch Tunnel, which was constructed in the mid 1800's. The tunnels used vertical ventilation shafts with fires in them to circulate air. In 2001, the 'SA' Tower, one of the last manned interlocking towers was decommissioned and demolished.