Comments from Eric Augatis on this photo and abandoned line:
This is a picture of the long abandoned Shoenersville Industrial Track from the old Airport Road (PA 987) overpass. This was the former LNE Catasauqua Branch which in it's most recent years broke away from Conrail's Cement Secondary at Crane Junction (between Steuben & Bath, PA). There is a light industrial park located just west of here off Airport Road, where a consignee used to get cars up until about 1994 when the line was torn up back to Crane Junction. This is one of those aspects of railroad photography I enjoy, knowing that a train will never ply it's ROW again. This line shows in the Northeast SPV Atlas as intact/active, but indeed it's long gone (at least since I've been in the area since 1999).
Thanks to Eric Augatis for contributing information about this route.