is it Intended to be a mrrative of the constructionoperation. Chronology can be t~ced f~m the progress charts which are a PSrt of this report, and Mrrative is sacrificedb pertinent cofmnentson typO construction. The bases of all the reinforced concrete buildings were poured using a mix df 6 bags local sand, and ~ of high early strength cements 1.4cubic feet Of cubic feet of coarse coral rock fmm the Engebi crushing and screeningplant. Because of the poorly graded aggregates the resultant concrete had a ce~nt content of 7 bags per cubic yard. Concrete was handled by crane from mixer to forms using locally constructedbottom dump buckets as the buckets shipped out were too large and heavy for the cranes available. There were only two difficulties encountered in this phase of the work. It was necessary to resort”to rether elaborate spread footing supports consisting of a metal plate and a concrete block to hld the reinforcing steel up off the sand. There were insufficiat vibrators avdlable and the two in use tith broke down on the base of Gamma A. wa8 th The nmt unusual feature use of 0.05% of sugar to cenmnt content by weight in the con- crete for the base of Game C. The delay in setting time caused by the added sugar permitted the concrete for this base to be mixed on Biijiri end transportedacross the I.a@on by DUKW to Rojoa. This same technique was used for all concrete, including the special concrete, poured on Rojoe. Early in this period work was started on the placing of the Bureau of Yarda and Docks reinforced concrete cubes. The original plan called 25 Section XVI