Conrail suffered a major service interruption on July 24, 1984. Around 5 o’clock in the morning, westbound train OIIN was passing the Berks Products stone quarry in Temple, Pennsylvania when several hundred feet of the Blandon Low Grade slid into the quarry along with several of OIIN’s cars. The loss of the Low Grade effectively killed one of Conrail’s major east-west routes. By a stroke of luck, the Hill Track, the original East Penn line between Reading Yard and Blandon, was out of service but intact. The crews that were in town to start ripping out the Hill Track instead got busy getting the line reopened the same day as the collapse occurred. Single-tracked, slow ordered, and with a 1.1% ruling grade, the Hill Track remained in service until the following December, when Low Grade repairs were complete. Here, days before service on the Low Grade was restored, a westbound manifest enters the Hill track at Blandon, with the Low Grade in the background.