First Welland Canal 1818, when the flow was especially low, Merritt pursued the idea of bringing water to his mills from the Welland River. On a bigger scale, the Erie Canal, dug from the Hudson River through northern New York, was about to reach Lake Erie. The impending completion meant the cargo from upper Great Lakes was about to head down the canal and Hudson River to New York City, bypassing its previous destination, Montreal. At the time, a considerable rivalry existed between Montreal and New York for cargo headed to Europe via ocean-going vessels. All of these factors contributed to the construction
Thames and Severn Canal and remains the fourth longest. There were always problems with water supply, as no reservoirs were built, while the summit section near the tunnel ran through porous limestone, and there were constant difficulties with leakage. Competition from the railways took much of the canal's traffic by the end of the 19th century, and most of the canal was abandoned in 1927, the remainder in 1941. Since 1972, the Cotswold Canals Trust has been working to restore both the canal and the Stroudwater Navigation, so that it can again provide a navigable link between the Thames and the Severn. A number