Before revision: History 18th century The original engineering concept developed by the Society and the navigation company was to build a canal up to the Schuylkill Valley to Norristown, improving the Schuylkill River from there to Reading.
After revision: A 1791 map of the roads and inland navigation of Pennsylvania, and part of the adjacent states based upon the river surveys in 1790 and 1791A 1792 map of a proposed route for the summit canal based upon Brindley's survey of 1791History 18th century The original engineering concept developed by the Society and the navigation company was to build a canal up to the Schuylkill Valley to Norristown, improving the Schuylkill River from there to Reading.