In addition to these major changes and additions to the scope of facilities on Parry, there were numerous other changes which affected site planning. These other changes, directed by AEC, involved the addition, deletion, or relocation of structures, As had been antici- pated during the early stages of planning, the over-all effect was a multifold expansion of both installations and personnel requirements. Indication of this can be gained from noting that population, estimated in the Reconnaissance Report at 600, reached a peak of 1530, with two or three-day peaks of over 2200, Master planning had envisioned that on all sites, where possible and practical, advantage would be taken of existing roads, structures, airstrips, and other facilities, As indicated in the Reconnaissance Report, however, except for several usable warehouse buildings, practically none of the Parry facilities were usable. Even the airstrip was in poor condition and badly oriented. Parry Island is the third largest in srea of the many islands of the Atoll. It extends in a north-south direction. The narrow southern half of the island was not as well adapted to development as the wider northern half. On the extreme northern tip of the island were some permanent navigational aids and several borrow pits which were to be preserved, The north central section of the island, however, was wide enough for development and contained five or six usable quonset warehouses. In addition, the location of the airstrip and certain roads which could be repaired made this part of the island the logical choice for installations. The location of these existing features, the size and shape of the site, and the interrelation of the different parts of the camp determined the final arrangement of the site. Because of the corrosive salt spray, all construction on the ocean side of the island, was kept at least 100 feet from the shore. The direction of the prevailing breeze determined the orientation of the individual buildings. The combinedaiministration building for both the scientists and H & N and the administration building for JTF-3, along with several laboratories, were enclosed in a security compound. This compound, the mess hall, a post exchange, two recreation buildings, and an open air movie theatre formed the heart of the camp and were readily accessible from any part of the site. East of this central group was the semi-permanent personnel area, extending along the open shore. This area was divided into two parts, one for the scientists and one for the construction workers. The infirmary was between them, At the request of AEC, the scientists' quarters were placed in pairs, each pair forming a "V", so as to funnel the wind between the buildings. South of the headquarters area and adjacent to the JIF-3 administration building were located the quarters for Task Force personnel, a tent camp of 50 4-man tents, later extended by the addition of 5 8-man tents. Service facilities were placed along the west or lagoon side of the island. This arrangement allowed the POL facilities to be isolated 5-47