Schuylkill River in Philadelphia

The Schuylkill River, most often pronounced, is a river in the U.S. Commonwealth of Pennsylvania. It is a designated Pennsylvania Scenic River.
The river is about 209 km long. Its watershed of about 5,000 km² lies entirely within the state of Pennsylvania. The source of its eastern branch is in the Appalachian Mountains at Tuscarora Springs, near Tamaqua in Schuylkill County. The west branch starts near Minersville and joins the eastern branch at the town of Schuylkill Haven. The Tulpehocken Creek joins it at the western edge of Reading. Wissahickon Creek joins it in northwest Philadelphia. Other major tributaries include the Little Schuylkill River, Maiden Creek, Manatawny Creek, French Creek, and Perkiomen Creek. The Schuylkill joins the Delaware River, of which it is the largest tributary, at the site of the former Philadelphia Navy Yard, now the Philadelphia Naval Business Center, just northeast of Philadelphia International Airport.