The middle building, which we called the Ironworks Building as its main tenant was a company called Lakehead Ironworks, is my latest drawing. I did this one in a 1px=1ft scale. I used Photoshop to add the horizontal lines on the concrete slipform portions (an effect I'll try to remember if I decide to draw the larger grain elevators) and the staining on the concrete. That building was originally built as a small grain elevator, but the silos were removed in the 1940s and a wide variety of industrial businesses have been in there over the past 70 years. It currently has some vacancies as most of Lakehead Ironworks has relocated to a new facility.