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
Neath and Tennant Canal in March 2008. The plate girder aqueduct is believed to be the longest single span aqueduct in the UK. It is wide, and includes a footpath on both sides of the navigation channel. A new car park and slipway were provided from the B4242, and the Clun locks were renovated, to give of navigable canal from central Neath to Abergarwen. Following improvements, the towpath between Briton Ferry and Tonna has become a cycle route, in conjunction with Sustrans, the sustainable transport charity. Several obstacles remain before the canal restoration can be completed. To join the two navigable sections a new