Port Weller Dry Docks was a shipbuilder on the Welland Canal at the Lake Ontario entrance. The shipbuilder was founded in 1946 and the site was initially owned by the Government of Canada for storage purchases. The shipyard expanded to include ship repair, and reconstruction work. In 1956, the drydock was sold to the Upper Lakes Shipping Company, which began the construction of vessels at the site. The shipyard twice went insolvent, most recently in 2015. Port Weller Dry Docks was used to build, refit and repair cargo vessels.