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 channels of the Welland Canal and connected to "solid" ground only by the relatively small plug in the old canal along the Townline Tunnel approaches. A man-made geographic feature is the Merritt Island, a strip of land approximately five kilometres long and, in some places, less than 100 metres wide. The island was created when the alignment of the First Welland Canal was constructed basically parallel to the Welland River and since the abandonment of the old canal has been established as Merritt Park, featuring a popular four kilometre-long paved trail. Welland experiences a humid continental climate (Köppen "Dfb") typical