One and A Half Train Bridges, and a Drain

Depends on what you do here.

The bridge foundations are all that remains of the Canadian Northern Railway bridge that once crossed this valley, built in 1917 and abandoned around 1937, and presumably taken down for scrap sometime soon after. The active train bridge belongs to Canadian Pacific, and was probably built along with the line, between 1912 and 1914. The drain is part of the new subdivision to the north, and is likely the burying of a local creek that is visible on maps before construction started, but disappears after.