Philip Louis Pratley (December 4, 1884 – August 1, 1958) was an English-born Canadian bridge designer.
In 1909, Pratley played an important role in the planning of the Quebec Bridge over the Saint Lawrence River.
He was also involved in the construction of the Boucanée River Viaduct (1913) and the Saint John Highway Arch Bridge (1915) in New Brunswick.
[2] In 1920, he conducted a review of the bridges on the Grand Trunk Railway on behalf of the Canadian government.
[1][3][4] In 2005, Pratley was designated a Person of National Historic Significance by the government of Canada.