Chillisquaque Creek is a tributary of the West Branch Susquehanna River in Montour County and Northumberland County, in Pennsylvania, in the United States. It is approximately 20.2 miles (32.5 km) long and flows through Derry Township, Washingtonville, and Liberty Township in Montour County and East Chillisquaque Township and West Chillisquaque Township in Northumberland County. The watershed of the creek has an area of 112 square miles (290 km2). Agricultural impacts have caused most of the streams in the watershed of the creek to be impaired. Causes of impairment include sedimentation/siltation and habitat alteration. The average annual discharge of the creek between 1980 and 2014 ranged from 48.2 to 146.0 cubic feet per second. Its watershed mainly consists of rolling agricultural land. The creek's channel flows through rock formations consisting of sandstone and shale. It is a warmwater stream.
Chillisquaque Creek looking downstream above Washingtonville
Chillisquaque Creek from Interstate 80
Chillisquaque Creek below Washingtonville
Chillisquaque Creek in Derry Township
West Branch Susquehanna River
The West Branch Susquehanna River is one of the two principal branches, along with the North Branch, of the Susquehanna River in the Northeastern United States. The North Branch, which rises in upstate New York, is generally regarded as the extension of the main branch, with the shorter West Branch being its principal tributary.
The eastern side of Williamsport seen from the southeast on Bald Eagle Mountain. In the foreground is the West Branch of the Susquehanna River. Beyond Williamsport can be seen the higher part of the dissected Allegheny Plateau.
West Branch Susquehanna River near Montgomery, in Lycoming County
West Branch Susquehanna from Hyner View State Park in Clinton County, Pennsylvania
The confluence of the West Branch Susquehanna River (left) and North Branch (center) of the Susquehanna River, along with the borough of Northumberland (left) and city of Sunbury (far right). View is from the Shikellamy State Park Overlook and includes the Shikellamy State Park Marina unit on Packer Island (although the docks had already been taken in for the winter when this photo was taken).
