AEC Contract Administrator, 1 print J-6, J-Division, Los Alamos 1 print (additional H & N General Superintendent of Construction, Los Angeles 1 print H & N Estimating Department, Los Angeles 1 print H & N Engineering Division, Los Angeles 1 print Los Alamos prints as requested) Prints issued to the Jobsite were ordinarily sent by air mail, but in many cases urgency required that the prints be hand-carried by authorized personnel going to the Jobsite. The transparency was issued for making additional necessary reproductions and for use as a basis for "as built" drawings, Each print or transparency was numbered and logged in a card index system in the engineering files, showing distribution, date issued, and number of revisions, All prints issued to Jobsite were accompanied by a letter of transmittal containing a receipted copy to be signed by the Engineering Manager at the Jobsite or by other delegated personnel and returned to the Engineering Division in the Home Office as evidence that they were received, REVISIONS TO DRAWINGS Changes in design or changes in location were often requested by Users after completed drawings had been approved by the Chief Engineer and issued to Jobsite, Drawings were revised to incorporate these changes and were then reissued in accordance with the procedure outlined above. The total number of drawings required to complete the Project (839 scientific stations, 337 aluminum buildings with a total floor area of 482,765 square feet, 644 tents, and 115 rehabilitated buildings) was far in excess of the 876 final drawings prepared by the Engineering Division in the Home Office and approved by the Chief Engineer, In addition to the many preliminary drawings, there were 110 drawings completed and approved but later voided and replaced by new drawings because revisions were so numerous or extensive that the original draw ings could no longer be used, and 575 drawings prepared by the engineer- ing force at the Jobsite. There were 1289 recorded revisions to drawings prepared in the Home Office. A system was set up for the identification and control xf drawings, Preliminary drawings were identified by the letters "SK" followed by a number, The first digit indicated the originating department; the other digits, the serial number, 5-14 RETURN TO DOE/NV TECHNICAL INFOHMA TION RESOURCE CENTER