This #TransitTuesday, I’m sharing a lantern slide image that, more than 110 years after its creation, never fails to remind me that maybe I am just a little acrophobic after all.
This slide shows the Quebec Bridge over the Saint Lawrence River, as seen from above during construction on June 22, 1907. Still the longest cantilever bridge in the world, the 1,801 foot long Quebec Bridge was engineered by the Phoenix Bridge Company, based out of Phoenixville, Pennsylvania.
In the two decades prior to the creation of this image, three of the Phoenix Bridge Company’s construction projects had collapsed, with tragic results. The month after this image was captured, a section of the bridge seen here collapsed, killing 75 of the 86 workers on the bridge and injuring the remaining survivors. The bridge was then rebuilt and completed under the oversight of the Canadian government, though not without incident; on September 11, 1916, a span of bridgework fell while being hoisted into position, killing 13 workers.
The Quebec Bridge was finally completed and opened to the public in August 1919, and has spanned the river largely without incident in the years since. During these years, however, engineers tasked with investigating the bridge disasters, most notably John Galbraith, dean of the Faculty of Applied Science and Engineering at the University of Toronto, continued to advocate for changes in the profession to prevent similar catastrophes in the future.
Much of the blame for the 1907 collapse ultimately fell on the consulting engineer, Theodore Cooper, and the Phoenix Bridge Company’s Chief Designing Engineer, Peter L. Szlapka. Cooper, a highly successful engineer with a number of prestigious projects behind him, had dismissed prior warnings from an engineer employed by the Canadian government, protesting that to act on the recommendations being made would “put me in the position of a subordinate, which I cannot accept.” Cooper also refused to supervise construction on site, and tasked the work to Szlapka, who was not qualified for the job. Cooper, Szlapka, and others involved in the disaster were excoriated in the Canadian press for having placed ego and profit above safety, and for neglecting their professional and ethical obligations.
In 1925, Galbraith and others formed the basis of what would become today’s organizations of Professional Engineers. This Canadian licensing system for engineers was designed to regulate the industry and ensure that its practitioners are sufficiently qualified, aware of and attentive to their ethical responsibilities, and registered in the province in which they work.
This lantern slide is from the Hagley Library’s Phoenix Bridge Company photograph collection (Accession 1971.MSS.0916). To view more items from this collection, visit its page in our Digital Archive by clicking here.