I wasn't able to read the article to see what the timelines are, but here's another article (below) relating to the water bomber production. It mentions DeHavilland going ahead with it, and mentions them being assembled in Calgary. I don't believe there are any current production facilities, so production would be at the new facilities by Strathmore?
Varcoe: Demand grows for Canadian-made water bombers as De Havilland aims to build new 'Super Scoopers'
Calgary-based De Havilland says interest in its new amphibious firefighting aircraft is growing as countries battle wildfires from the air.
calgaryherald.com