CHAPTER Il, SECTION 5 Figure 2-198. Assembly Area - Building 413 plied from the area electrical distribution system from the Sub-station located near Building No. 411. ENGINEERING. The original criteria were received on 26 March 1953. Room arrangements were received from the User on 1 May. Design work started on 15 April. Three drawings and one sketch were prepared and submitted from 27 April to 8 June. Approvals were dated from 29 May to 1 July. CONSTRUCTION. Work started on 17 April 1953 and was completed on 25 March 1954. Figure 2-197 notes the status of work as 46% completed on 15 October. BUILDING NO. 413 MAGAZINE SITE ELMER GENERAL. Building No. 413 was a reinforced concrete structure 22’ - 0” square with an earth covering of three feet and side beam protection and was used as a magazine for the storage of high explosives. Wing retaining walls held side fills to prevent door obstruction. MECHANICAL. A ventilation system was installed which provided nine air changes per hour. ELECRICAL. Explosion-proof incandescent lighting for Class 1, Group C locations was provided. ENGINEERING. Criteria were received on 25 March 1953. Design work started on 15 April. Three drawings and one sketch were prepared Page 2-200 and submitted from 27 April to 2 June. provais were dated on 19 June. Ap- CONSTRUCTION. Work commenced on 16 July 1953 and was completed on 23 January 1954. Figure 2-198 shows the main and wing walls poured. The status of work on 20 August was estimated at 74% completed. BUILDING NO. 414 GUARD HOUSE SITE ELMER GENERAL. This building was an & - 0" x 12° 0” frame building with corrugated aluminum roofing and siding constructed on a concrete slab foundation, with open front. The building was used as a guard shelter. ENGINEERING.Criteria were received on 25 March. One drawing was started on 10 April, submitted on 15 April and approved on 29 April 1953. CONSTRUCTION. Work commenced on 1 July 1953 and was completed on 12 December. BUILDING NO. 415 SPECIAL TEMPORARY STORAGE BUILDING - SITE ELMER GENERAL. This building was constructed of reinforced concrete, 21'-4" x 25’- 4” long, surrounded by a sloping earth berm the full height of building and had diagonal wing walls pro- tecting the entrance. The building was used for general storage.