The watershed draining into the year one project area is defined by the green line.

Our best current estimates are:

955.5 miles of streams at the time of European settlement.
564.2 miles are still open.
389.9 miles are now culverted.
1.4 miles uncoded

30% of the streams in the core of Allegheny County have been buried. Within Pittsburgh city limits, that figure is much, much higher.