The northerly component of the westerly layer in the wind structure at Tsongi is a help actually in affording fallout petterns from Taongi which have little tendency to encompass Wake Island. An examination of the Bikini firing sector shows a usable fallout sector with an included angle of approximately 150°. At Taongi, neglecting Wake for the moment, the usable firing sector is 270° when laid out to miss populsted areas by the same margin in the two cases. To be safe as far as Wake is concerned, and if a 30° sector, for example, is subtracted out to include Wake on its bisector, the total usable sector at Taongi is 240° and is 90° larger than at Bikini. each side by a generous 190 miles. De This sector clears Wake on Cost of Development During the past few weeks, Task Group 7.1 bas developed in conjunction with Task Group 7.5 a staff study on the costs involved, aside from those of operational logistic support, in developing Taongi Atoll to the etage which vould allow the mooring and detonation of the first device barge. This study was requested earlier at a time when UCRL’s planning was considerably less firm and when the laboratory was not in a position to evaluate the plen for shipdDoard. remote diagnostics as feasible or not feasible. As a consequence, and without knowing whether or not major lend stations would be required, two hypothetical situations were described to Task Group 7.5 and the architect enjjineers were then asked for dollar estimates of the cost of prepering for each of the two situations. Situation No. 1 described a concept of operation along winimal lines which would involve the necessity of lagoon entry, establishment of the necessary minimsl camp and the construction of facilities ashore comprising a firing and control station equivalent to the existing Station 7O on Enyu Island at Bikini. A second situation described a greater effort in which the construct- ion of three major stations similar to Castle Stations 1210, 1342, 1550, and en airstrip were added to the minim) requirements, ‘The costs of access and construction for each of these two situstions are stated in a letter for- warded by the architect engineers, Holmes and Narver, Inc., to ALO (Howell to Sanders dated 30 January 1957) and are quoted belov: For the winimm scope of vork contemplated, it is estimted 65 construction ara 35 operation personnel will te required fcr a period of six and one~-naif months prior to the first shot. The mximum scope of work will require 120 construction and 8 operation personnel for a period of seven and ons-helf months. These schedules cover on-site construction only; a minimun of four months must be added to these schedules for procurement and shipment of material and equipment. In estimating the time schedule, it has been assuned that the topography of the proposed airstrip site will be similar to that of Ban and that beaches for landing craft, coral deposits, trees, underbrush and other conditions will be similar to those of other atolls in which construction operations have been conducted. COPIED/DOE LANL RG,