League Island
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League Island was an island in the Delaware River, just upstream from the mouth of the Schuylkill River. League Island is the site of the Philadelphia shipyard that eventually became the Philadelphia Naval Shipyard. League Island, now attached to the shore as the channel was closed at the eastern end to form the present ship basin and former airfield.
League Island is located at the foot of South Broad Street, Philadelphia, Pennsylvania, USA Coordinates: .