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 Canal it may last much longer before it needs to be replaced. On June 20, 1912, the government survey steamer "La Canadienne" lost control due to mechanical problems in the engine room and smashed into the upstream gates of Lock No. 22 of the 3rd Welland Canal, forcing them open by six inches. The resulting surge of water flooded downstream, cresting the upstream gates of Lock No. 21 where five boys were fishing. One boy ran to safety and one of the boys, David Boucke, was saved by a government surveyor Hugh McGuire. But the remaining three, Willie Wallace Tifney (age