Printing on bottom states, "1657-42 US Navy Yard, SC. October 30, 1942. Contract NOy-4217, Turb-generators in Power Plant, showing space for new 5000 kw, unit #6 and piping in progress, including holes cut for relocating existing exhausts. File 13669."
Printing on bottom states, "1652-42 US Navy Yard, SC. October 30, 1942. Contract NOy-4217 New coal handling facilities in operation at Power Plant. File 13664."