Milwaukee Western Fuel Company, Milwaukee, Wisconsin. The tunnel at the Seventeenth Street docks of the Milwaukee Western Fuel Company. This is an underground tunnel that runs underneath the coal piles along the entire length of the Seventeenth Street dock. It is nine feet high and is in two sections: one 600 feet long, and the other 1200 feet. A moving belt runs the length of each section carrying coal to the processing plant. Chutes located under each pile of coal are opened onto the belts as each type of coal is required. Instructions come to the tunnel operator by telephone