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 the area became known as simply Aqueduct. A lock to cross from the canal to the river and vice versa was also built. A small shantytown soon developed around the facility, providing essential services in what was a convenient stop-over location for travelers and workers on the canal. The growing town was later named Merrittsville, after William Hamilton Merritt, the initiator of the Welland Canal project. This name is reflected in the name of the Merrittville Highway (Niagara Road 50), which served as the primary north-south route in central Niagara before the construction of Highway 406. Welland gained its present