Pennsylvania Is Demolishing a Dead Mall to Build a Costco on Top of It Washington Mall Pennsylvania, dead mall demolition PA, Costco replacing mall, Washington PA mall history, abandoned malls Pennsylvania #PANostalgia #PennsylvaniaHistory #PAIdentity #DeadMalls #Costco Opened in 1968 on a former cornfield, Washington Mall slowly died after losing Giant Eagle and JCPenney, sat abandoned for a decade, and is now being demolished so a Costco can rise where a Pennsylvania mall once stood.