Well, it probably was once 3 tracks in places at least. It goes back to the late 1870s, as the Philadelphia and Atlantic RR, built from Camden to Atlantic City. It was quickly acquired by the Reading RR to compete with the successful Camden and Atlantic RR which dates to the 1850's between the same two endpoints and wasacquired in the 1870's-1880's(?) by the Pennsylvania RR, becoming part of their West Jersey RR subsidiary. By the 1880's the Reading built a branch to Cape May leaving the Philadelphia and Atlantic main near Winslow, and a branch off of that leaving from Tuckahoe to Ocean City (from which the the Beesley point line splits off), and a few more branches off of the line to Cape May to shore points like Wildwood.
When things got tough and cars popular, around 1931 the PRR and Reading combined their lines in South Jersey as the Pennsylvania Reading Seashore Lines (PRSL). The Reading and PRR had nearly parallel lines from Winslow Junction to Atlantic City, so the Reading main east of Winslow to Atlantic City was abandoned then in favor of the PRR line. Conversely, the Reading line to Cape May survived and the PRR line to Cape May was abandoned. Passenger service to Cape May and Ocean City hung on til around 1980 I believe. The line south of Tuckahoe to Cape May has been mostly inactive since then. So since that time the original Reading tracks through Haddon Heights, Barrington, Somerdale etc "end" at Beesley's Point. The tracks from Camden to Beesley's have been part of Conrail since 1976 when it began.
I don't know when the Beesley point branch itself was built, probably in the 1950's or so to serve the then new coal fired power plant.
EDIT: a link with a 1952 photo of 2 main tracks + an overgrown siding in Stratford. http://michaelfroio.com/blog/2015/7/17/ ... -boardwalk
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