CHAPTER II, SECTION 3 Station 1310. Instrument power was received from Station 1310 through lines in a 4-inch ed, difficulties were encountered when it was dis- telephone, and signal circuits. between Stations 1524 and 1520. As this station conduit; other conduits were run for utility, After the base of Station 1311.01 was pour- covered that the building was in theline of sight was to be utilized for the second and not the first shot, it was decided to set all wall and ceiling reinforcing steel and weld rather than tie it; the cage of the reinforcing steel was then cut one foot from the floor and moved out of the line of sight. After the first experiment, the cage was set back in place and two splices were welded on to tie the cage to the steel protruding out of the base. The station was then formed and poured monolithically. This procedure proved to be very satisfactory due to thecritical time element. STATION: PURPOSE: SITE: USER: PARTICIPATION: CONSTRUCTION: 1312.01 Alpha Detector Yvonne DOD-13 24 3-15-56/4-24-56 This station was a wooden frame platform 8’-714x6'-514"x7’' high and set at an elevation Figure 2-69. Station 1311.04 - 80% Complete In order to retain cover over Station 1311.04 during high tides, a 15-foot retaining wall was built on the ocean side of the building by driving rail piles in the reef and covering them with planking. A total of 1,032 cubic yards of concrete was used for these stations with an average 28-day cylinder break of 3,733 of plus 16 feet. The platform was located on an existing slab next to Station 24. A User-furnished detector was mounted on the station at an elevation of plus 17 feet. Five pair of signal wire were run from Stations 1312.01 to 1311.04. No power was required. STATIONS: PURPOSE: SITE: 1313.01, 1313.03, 1313.05 and 1313.07 Alpha Detectors Yvonne USER: DOD-13 PARTICIPATION: 6 and 7 These stations were two User-furnished and installed detectors located at the 18714-foot level and in the cab on Station 7, and at the 287%4-foot level and in the cab of Station 6. Powerconsisted of 3 KW, 120-volt, single-phase. Five pair of signal wire and one phone jack were provided at each location. STATIONS: PURPOSE: SITE: 1314 and 1315 Goaxial Cable Junction its Yvonne USER: DOD-13 PARTICIPATION: 6, 7 and 24 CONSTRUCTION: 11-25-55/4-28-56 Figure 2-70. Station 1311.01 - Reinforcing Cage Cut and Moved Out of Line of Stations 1524 and 1520 Page 2-84 These stations were heavily reinforced concrete underground pits in which User-furnished coaxial cable was spliced and branched off to various detector stations. Station 1314 was 12’4” x 11'-8" x 11'-6” high with 2’-6 inch walls and