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 15 impact from a ship. The swing bridge sitting right in the middle of the channel was severe hazard. Anecdotes from some sailors who travelled through this bridge indicate that there was a bell located on the bridge which would ring whenever a ship made contact. This would warn the crew to check for damage. After the opening of the St. Lawrence Seaway in 1959, large ocean-going vessels were frequent visitors to the Welland Canal. Many of these ships are far better suited to the open ocean than to the narrow confines of the canal. The hazard created by this bridge,