Passing through the pastoral Lancaster County landscape the eastbound ascent of Mine Ridge takes the PRR mainline around a series of reverse curves that carry the railroad over the 560’ summit dividing the Pequea and Chester Valleys. Gap, a quaint community whose history dates back to when William Penn visited the area late in the 1600’s is located at the crossroads of the Philadelphia & Lancaster Turnpike and the Newport Turnpike. The small village of roughly 1900 residents is divided by the first pair of significant curves on the main line including the 4° Eby’s curve and the 4° Gap curve. To attain the summit the railroad climbs a .56% ruling grade and enters a cut on the Gap curve through Mine Ridge, limiting trains to a maximum of 50mph. Through William H. Brown's improvement years there were several attempts to reduce curvature of the route, but an ambitious project was proposed to eliminate the curves all together in the first quarter of the 20th century. With an estimated cost of $2.7 million, the realignment would require the removal of a large piece of Mine Ridge to eliminate a total of four curves with one large gentle arc, increasing speeds from 50 to 90 mph and reducing average travel time by 1.5 minutes. Alas the realignment was deemed too costly for the time and was never revisited, leaving the same basic arrangement that survives today now part of Amtrak's Keystone Line.
Photographs & History
Photographs and History