The bridge that the Mason-Dixon Trail utilizes on Century LA near Franklin Twp. Park, PA has been deemed structurally deficient. According to the Twp. secretary they let out bids on June 8, 2016. The bridge will not be rebuilt until between October and December, 2016. In the meantime, follow the autos detour (W->E Hickory->US15->Range End->Century. There is a map of this blockage and a detour at:
http://www.mason-dixontrail.org/franklin_twp_closure06102016.jpg