Defining the Darby-Cobbs Watershed

Darby Creek originates in Easttown Township in Chester County and flows in a south/southeast direction through most of the watershed.  It changes direction in the southern portion of the watershed where it flows west/southwest direction until it discharges into the Delaware River between the Townships of Ridley and Tinicum. 

Darby Creek’s watershed is often referred to as the “Darby-Cobbs watershed” since its largest tributary, Cobbs Creek, is approximately one third of the Darby Creek watershed. The Darby-Cobbs watershed has a total area of 77.2 square miles [Source].

The major tributaries of Darby Creek:

• Cobbs Creek
• Little Darby Creek
• Julip Run
• Ithan Run
• Meadowbrook Run
• Wigwam Run
• Foxes Run 
• Muckinipattis Creek 

Note: I have started editing Darby Creek on Wikipedia.  I am also working on edits for Cobbs Creek and Indian Creek (subwatersheds of interest in Darby Creek).