If the Philadelphia port deepening project is blocked, the port authority says area ports will be at a competitive disadvantage.
The project traces its roots to 1983, when the U.S. Congress directed the Army Corps to study modifying the existing main shipping channel. A feasibility study with numerous environmental and economic studies commenced in 1987 and Congress in 1992 authorized the project.
Environmental groups have fought the expansion for years.
The port authority is the lead local sponsor of the project.