| Revision as of 19:57, 13 January 2011 editB137 (talk | contribs)Extended confirmed users, Pending changes reviewers, Rollbackers25,120 edits ←Created page with ''''Sand Patch Grade''' is a ~100 mile length of railroad track known for it's steep grades and curves through the Allegany Mountains of Pennsylvania and Mar...' | Revision as of 20:01, 13 January 2011 edit undoB137 (talk | contribs)Extended confirmed users, Pending changes reviewers, Rollbackers25,120 editsNo edit summaryNext edit → | ||
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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. <ref>http://www.ihavideo.com/HIedscorn1.html</ref> | '''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> 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> | ||
| ==References== | ==References== | ||
Revision as of 20:01, 13 January 2011
Sand Patch Grade is a ~100 mile length of railroad track known for it's steep grades and curves through the Allegany Mountains of Pennsylvania and Maryland. 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.