Here's the answer on number of coal storage buildings.
There were only TWO government owned coal transfer buildings at Randolph during the time of the KC.
The first was built for the KC operation and completed in late July 1890. This building was severely damaged during the winter ice flows of early 1896, and replaced in September 1896. This second building survived until well after the KC stopped running, although with numerous shore-ups, and roof and runway modifications.
There appears to have been only two coal storage building at Togus over the KC years. The first, built in 1894, replaced open coal piles. The second was built in 1899, and was modified many times over the next 25 years.
Source : Fourtin Powell papers in the WW&F Archives