in 1959. During urban renewal in the 1960s, new sewer lines were constructed in the area, and archaeologists investigated the former site of the city's main waterfront. An art project in 2008 through Philadelphia's FringeArts Festival investigated the former course of Dock Creek between Third and Fifth streets, in what is now Independence National Historical Park. Notes References Books Articles Newspaper Websites Tributaries of the Delaware River Former rivers Subterranean rivers of the United States