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 to the Pennsylvania Canal. On March 27, 1824, an act of the Pennsylvania legislature authorized the appointment of a board of canal commissioners to view and explore routes for a canal from Harrisburg to Pittsburg. The commissioners, Colonel Jacob Holgate, James Clark, and Charles Treziyulney, were appointed March 31. From May until December they were in the field. Their exploration resulted in the following estimate of the height to be overcome between the Susquehanna and Ohio: