Elroy is the original name of this siding that was established as part of the Grand Trunk Pacific Railroad. Back when the Grand Trunk Railway Company was planning a western expansion of their establish rail system, an unknown person devised an alphabetical naming scheme to name all of the un-named stations and lines, starting in Manitoba, cycling five full rounds of the alphabet, and starting a sixth before finally ending at Prince Rupert, British Columbia. Elroy is part of the second cycle, situated between Melville and Fenwood.
The name "Elroy" remained just long enough that it was shown on a map in an Atlas that was published in 1911.
The name didn't last long, though. All maps after that show the location as "Birmingham". I have been uable to find a historical reference that reports the events of the naming of the Hamlet.
Grand Trunk Pacific Railroad went out of business in the early 1920's. The railroad was taken over by the Canadian government and was made part of the Canadian National Railroad which is very active to this day.
Here is a link to some online resources regarding the history of the Hamlet of Birmingham:
Historic aerial photo of Birmingham in the 1950's
Archived text regarding the G.T.P.R.
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