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
Thames and Severn Canal navigable state. The condition of the canal continued to decline. Complaints were made about its state in 1874 and 1885, which resulted in surveys being undertaken, but little was done to remedy the situation. In 1893, the Thames and Severn company announced that the canal between Chalford and Inglesham would close two days later. Negotiations with a number of interested parties took place, and having given an assurance that it would not be converted into a railway to the Great Western Railway, an Act of Parliament was obtained in 1895, which formed a Trust with powers to raise £15,000. The