Pratley was the design engineer of the bridge. He worked for the Montreal firm Monsarrat & Pratley.
- He was born in Liverpool on 4 December 1884 and died on 1 August 1958. Source S113
- The CSCE plaque names him as the design engineer. Source S003
- Canada named him a National Historic Person in 2005. Source S113
- His firm also designed the Angus L. Macdonald Bridge in Halifax, a "sister" bridge. Source S001Source S109Source S112Source S113
ID LGB-P-0006