building of this central group was the Army Task Group Headquarters; the Army housing was adjacent to it. The semi-permanent aluminum buildings for Army Quarters (four 18-man buildings for officers, one 36-man building and three 72-man buildings for enlisted men) were placed nearest the headquarters building. twenty-one 8-man type) were farther east. The tents (one hundred and West of the mess hall was located another open air movie theater with the Air Force housing beginning immediately south of it. Five semi-permanent 18-man quarters for officers were placed nearest the mess hall and five semi-permanent 72-man quarters for enlisted men were put farther to the west with forty-one 8-man tents for officers between the two, West of the semi-permanent enlisted men's quarters were one hundred and sixteen S-men tents for enlisted personnel. EXPERIMENT ISLANDS The minimum facilities required for each of the experiment islands consisted of a weapon tower, an airstrip, and temporary housing. The weapon Towers could not be located on exactly the same sites as those used for earlier experiments because of the old tower footings, but they were located on the same zero lines, seventy-five feet behind the original zero points (away from the existing and planned instrumentation structures) . Previous experience indicated the desirability of providing temporary camps at each of the experiment islands to house the scientists and workmen engaged in preparation for the experiments. Basic design criteria led to the estimate that each location would need facilities for approximately 50 scientists and 150 workmen. Camp layouts were developed therefore, to serve these estimated populations. Inasmuch as accurate location data for scientific stations and other experimental structures were not available at the early stage of planning, particular care was exercised to locate camps as far from the towers and zero lines as practicable, leaving a maximm clear area along and adjacent to the zero lines available for scientific stations or structures, All experiment island camps were designed to permit disassembly of structures prior to detonations. Therefore all structures were designed as temporary or semi-permanent. Quarters were in 4-man tents, and the recreation facilities were housed in tents. The other facilities were in semi-permanent buildings. These included mess halls, fire and first aid buildings, offices, 100-man shower and latrine buildings, and repair shops. The only exception was the power plant structures which were blast-proof concrete because power was required after the snots. Where practical, tents and equipment were to be dismantled just before shot times and stored on Parry. 5=51