The elaborate marine railway and railroad tracks that ran throughout the Washington Navy Yard, as well as the heavy industrial manufacturing accomplished there required numerous railroad engines and cars to move raw materials, parts and finished products from one building to another. The upkeep of those railroad components, as well as steam shovels, locomotive cranes, coal conveyor equipment, the massive overhead cranes in many of the buildings and automotive, tractor trailer, truck and bus equipment was accomplished in Building 74, the Transportation Repair Shop, built in 1938. Two large doors that allowed such large scale, rail-mounted equipment to move freely in and out of the building, are still visible on the building’s north face. Building 74, the Transportation Repair Shop, will be transformed into townhomes.