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, bridge 13 operated manually. The Third Welland Canal was constructed between 1871 and 1881 and located slightly west of the second. The bridge over this canal was constructed one block south of Main Street at Division Street. This situation severed the primary commercial artery and caused hardship for local business. In winter when the canal was closed, a floating plank bridge, just 1.2m (4 feet) wide allowed pedestrian access across the canal at Main Street, but significant pressure was placed on officials to build a permanent bridge at this location. Eventually, a bridge known as the Alexandra Bridge was built at Main