CHAPTER 11, SECTION 3 USER: DOD-2 PARTICIPATION: 13, 18 and 22 CONSTRUCTION: 3-28-56/4-18-56 OCCUPANCY: 4-13-56 Station 271 was a User-furnished steel failout collector tower set on concrete piers. The tower was delivered to Nan by YFNABbarge, upon which the tower had been completely assembled. The tower was later placed on an LCU and transported to How. STATIONS: 310.01, .02 and .03, 311.01, .02 and .03 Loading and response of Structures Man-MadeIslands, PURPOSE: SITES: Charlie-Dog Reef: Except 311.03 on Dog USER: DOD PARTICIPATION: 18 CONSTRUCTION: 12-12-55/4-27-56 Figure 2-53. Station 268.22 - 95% Complete STATIONS: PURPOSE: SITES: 269.01 thru 269.04 Base Surge Measurements Fox, George, Oboe and Uncle USER: DOD-2 PARTICIPATION: 11, 13, 18 and 22 CONSTRUCTION: 3-3-56/4-12-56 OCCUPANCY: 4-12-56 These stations were two 4’ x 4’ x 2’ deep concrete foundations in each of which one 4” diameter 3’ high pipe column was embedded. A 3’ x 3’ x 2’ deep plate steel box was on the same center line as the two concrete pipe foundations. Conduit embedded in the concrete connected this box to each pipe column. Userfurnished equipment was placed in the steel box and on top of the pipe columns. A minus-1minute timing signal was required. Each station contained 2-1/2 cubic yards of concrete. STATIONS: 270.05 thru 270.08 SITES: Wilma, Bruce, LeRoy and PURPOSE: Fall-out Collectors and Cessation Monitors Mack USER: DOD-2 PARTICIPATION: 13, 18 and 22 Three 40’ x 40’ and three 40’ x 80’ steel structures were built. The User furnished drawings, steel schedules, and special provisions covering these structures, which were of the identical type used for Operation Teapot in Nevada. All materials and equipment, other than the structural steel and the test apparatus, were furnished by the Contractor. The siding and roofing were the same type and had the arrangement and attachment as in the build- ings utilized during Teapot. The locations were the following distances from Station 18 to the working point of the building: 310.01 (40’ x 40’) 20,500 feet; 310.02 (40° x40’) 24,000 feet; 310.03 (40 x 40’) 29,000 feet; 311.01 (40’ x 80’) 24,000 feet; and 311.02 (40’x 80) 29,000 feet; and 311.03 (40 x 80’) 35,600 feet. The area in front of Station 311.03 was cleared of debris and any rock more than 1-1/2 inches in diameter. The man-made islands had an elevation of plus 9.5 feet which was sufficient in height for protection against normal wave action. The leading edges of the man-made islands were rounded on a radius of approximately 2’ from high tide level to the normal elevation. The steel columns of each station within this series rested on concrete piers which extended through the island fill and 6” into the coral. The piers were interconnected by means of foundation walls extending down to coral. These stations were User-located, furnished, and installed measuring devices. During construction, it was found impractical to keep the foundation walls keyed continuously into the coral because of its hardness. STATION: PURPOSE: SITE: A decision was reached that adequate reaction would be obtained by keying only the pier footings into the coral and then driving Page 2-70 271 Fall-out Collector How