Not Pennsylvania heritage, but New York Central Railroad for this line. This is the Kankakee Belt, or 3 "I" line, from it's former owner the Indiana, Illinois & Iowa Railroad, later acquired by NYC. Your property in Lakeville is ex-PRR and ran from South Bend to Terre Haute via Logansport, known as the Vandalia line covered on another abandoned rail page.
Amber, I almost forgot to mention there is an abandoned East-West line on Lakeville's North side that was of Wabash Railroad heritage also. Hope that helps pin down which line ran beside your property.