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United States Postal Service mail processing facilities in Altoona, Erie, Greensburg, Lancaster, New Castle, Reading, Scranton, Washington and Williamsport, as well as the Southeastern operation are slated to close.
Read entire article: http://www.ydr.com/state/ci_20029285
Roy's Rants - For Your Information 
Isn’t the “Southeastern PA” regional office that big processing center in King of Prussia?
Yes, it’s off Route 202 on West Valley Road near Gateway Shopping Center.