As the PRR's A&S headed west over the deep valley of Pequea Creek toward the Susquehanna River, it established a strategically placed service complex by cutting a wider right-of-way through the fringe of Red Hill. The site included Smith Tower, originally SF for Shenks Ferry, along with a water station, ash dump, employee dwellings, track maintenance storage, and the westernmost reservoir of the water distribution system. A long passing siding and track crossovers allowed an entire train to be moved out of dedicated eastbound and westbound traffic. In earlier decades, eastbound steam locomotives coming from Enola Yard along the Susquehanna's edge on mostly flat ground stopped here to dump coal ash and refill their tenders before the gradual climb to Mars Hill Summit in Bart Township. By 1941, average A&S freight trains reached 89 cars, or 3500 to 4000 feet, and at peak development six tracks extended west of Smith Tower, three of them for nearly two miles. The facilities served the A&S for more than eighty years. Nearby, the Martic Forge Bridge rose above Pequea Creek, its eastern support trestle spanning a trolley line that carried passengers and packages between Pequea and Millersville, while views from the hills also took in the Colemanville Covered Bridge over the creek. The PRR built the A&S as part of the expansion of its wider system rather than as an instrument of local development, pursuing the substantial and sustainable revenue promised by successful long-distance freight operations.