Concurrent to the improvements on the main line at North Bend railroad contractor, Charles A. Sims & Company of Philadelphia was awarded the contract to complete the grading and masonry work for the easternmost segment of the Atglen & Susquehanna project in 1903. Sim's crews began the monumental task of building the new right of way in Sadsbury Township between Atglen (A&S milepost 3.3) west to Milepost 9, just beyond Lamparter Road, a total of almost six miles. Diverging from the shared right of way of the PRR Main Line that ran alongside the ridge of the North Valley Hills, the new line required a massive earthen fill to maintain the gentle grade as it veered southwest into the rolling countryside of Southern Lancaster County, making the ascent to Mars Hill Summit.
Material excavated from various improvement projects had been stockpiled on landholdings in the vicinity of Zion Hill. A six-mile narrow-gauge railroad was constructed to transport the fill material from these deposits, crossing over the mainline on a wooden trestle and on to the new right-of-way via temporary trackage. The usual assortment of manpower, steam shovels and a copious amount of dynamite were then employed to generate additional material needed to construct the new right of way. Part of this six-mile segment involved building the first bridge from the east; a large 60' single-arch masonry structure that spanned the historic Noble Road and the East Branch of the Octoraro Creek. The stone arch and wing walls were erected and then backfilled with material hauled in by Sim's narrow gauge railroad, a process repeated countless times as the line reached further west into Lancaster County.
While Sim's length of the A&S and the rest of the branch has found a renewed purpose as a recreational resource since abandonment in the Conrail era, the arch at Noble Road remains a symbolic portal, marking the crossing from Chester to Lancaster County. More importantly, it is a reminder of the stark contrast between the A&S and the role it played in our national railway network and the quiet life on the farm, typical of Southern Lancaster County.