The Union Canal was built in the early 1800's to run
from The Schuykill River in Reading to the Susquehanna
River south of Harrisburg PA.  These are photos of
a feeder branch that ran from Pine Grove PA
down thru Lebanon PA.  This area is now part of The Swatara
Creek State Park along Route 72 north of Lickdale PA.

(Note: Click on the image to see it full sized)