Great Lakes passenger steamers the lakes grew in size and number, and additional decks were built on the superstructure to allow more capacity. This inexpensive method of adding capacity was adapted from river steamboats and successfully applied to lake-going craft. The Erie Canal opened in 1825, allowing settlers from New England and New York to reach Michigan by water through Albany and Buffalo. This route opening and the incorporation of Chicago in 1837, increased Great Lakes steamboat traffic from Detroit through the straits of Mackinaw to Chicago. The screw propeller was introduced to the Great Lakes by "Vandalia" in 1842 and allowed the building
Canal Age Mohawk and Lake Ontario), but the company proved that private financing was insufficient. George Washington led a partly enduring effort to turn the Potomac River into a navigable link to the west, sinking substantial energy and capital into the Patowmack Canal from 1785 until his death fourteen years later. By 1788 Washington's Potomac Company was successful in constructing five locks which took boats past the Potomac Great Falls. The Chesapeake and Ohio Canal superseded the Potomac Canal in 1823. Christopher Colles (who was familiar with the Bridgewater Canal) surveyed the Mohawk Valley, and made a presentation to the New York