Dominion Bridge Company Limited was a Canadian steel bridge constructor originally based in Lachine, Quebec. From the core business of steel bridge component fabrication, the company diversified into related areas such as the fabrication of holding tanks for pulp mills and skyscraper framing.
Other Canadian plants were located in Amherst, NS, Toronto, ON, Winnipeg, MB, Regina, SK, Saskatoon, SK, Calgary, AB, Edmonton, AB, Richmond, BC and Burnaby, BC. In the 1960s and 1970s, Dominion Bridge expanded internationally and renamed itself AMCA International (AMCA name effective June 1, 1981). This name was later changed to United Dominion Industries. To keep name recognition alive, the company continued to call its Canadian division 'Dominion Bridge'. Between 1979 and 1988, the company's Lachine plant operated under the auspices of a subsidiary called Dominion Bridge-Sulzer Inc., which was co-owned by AMCA International and Sulzer Inc.
The Dominion Bridge facility in Burnaby, BC operated from 1930 until the mid-1970s at a 15-acre (61,000 m2) property located at 2400 Boundary Road. After being sold, this property was repurposed to become The Bridge Studios, the site of the largest special effects stage in North America.