Under tab "Power Plant". Printing on bottom states, "586-39 US Navy Yard, Charleston, SC 17 October 1939. Improvement of Power Plant. Allotment 7-08/0679.1-91-1 (PWA). 5000 c.f.m. steam driven Air Compressor. Contract NOy-3216. Looking northeast. File 7880."
Printing on bottom states, "(1) Non-Classified (2) EST-629 (3) Charleston Naval Shipyard, Charleston, South Carolina (4) 25 May 1966 (5) Nuclear Service Building (6) Not Applicable (7) Exterior of Bldg & Compound (8) Looking East (9) NBy-608020 (10) NBy-EST."