Welland Canal Port Maitland. With the opening of the extension, the canal stretched between the two lakes, with 40 wooden locks. The minimum lock size was , with a minimum canal depth of . Deterioration of the wood used in the 40 locks and the increasing size of ships led to demand for the Second Welland Canal, which used cut stone locks, within just a few years. In 1839 the government of Upper Canada approved the purchase of shares in the private canal company in response to the company's continuing financial problems in the face of the continental financial panic of 1837.
Welland By-Pass place on July 14, 1973. Overall, the project cost approximately CAD$188 million. The new channel reduced the length of the canal by and replaced six bridge crossings with the two new tunnels. It reduced the transit time through the Welland Canal by about 30 minutes (5%) as compared to the old alignment. The Welland By-pass markedly simplified ship passage along the Welland Canal. The city was no longer dependent on often erratic ship schedules. (For instance, a scheduled city-wide bus service was only instituted after the relocation.) A decision had to be made as to the use of the old