CHAPTER II, SECTION 3 Figure 2-74. Station 1320 - 97% Complete with a sighting tube assembly 30’ x 26’ longx 13’ high. A similar structure was previously located here but was damaged and required re- placement. The existing piles were utilized and eleven new steel piles were added. Within the structure were four 12” pipes used as sighting tubes. These were horizontal and each terminated in a steel blast door having a domed cover plate. Because of the high intensity of anticipated pressure and waves, the forward face of the structure was sloped in an attempt to resist uplift of the leading edge. Additional precaution was taken by driving 12’-long sheet piling on the forward areas using welded dowels to tie into the concrete. The entire station was covered with earth fill to a height of 14’ above the new building addition. As a precaution against wave action, which incidently was anticipated as being of a high magnitude, the leading face of the fill was sloped and covered with sand-cement sandbags which were then wetted down to form a bonded mass. Powerto station 1320 was provided by two 100 KW, 120/208 volt, 3-phase, diesel-driven units equipped with an automatic transfer switch for supply by a normal or stand-by gen- erator. The various generator and motor control circuits were run through conduits to the control and distribution panels. The engine control panel was connected to an EG&G relay which was extended to the timing terminal cabinet for engine shutdown. A User-furnished Bogue Set in conjunction with a Contractor-furnished battery rack provided power for the station at -hour. Page 2-88 Signal circuits were installed in an existing 3-inch conduit to the timing terminal cabinets in the generator and utility rooms, respectively. Telephone communication to this station was provided by circuits from timing Station 75.01 through existing conduit stub-out and termi- nated in two phone jacks in the utility room. A total of three timing, two phone, and one monitor circuits was utilized. To provide ventilation in the new generator room, a 9,060 cfm axivane fan was installed at ceiling, with a 30-inch square opening through the north wall for the air inlet. Exhaust air was removed through a 42-inch square opening in the ceiling leading to the concrete duct on the roof. This duct also contained the diesel exhaust pipes and a 10-inch air exhaust from the utility room. Blast doors were installed at each end of the duct. Two salt water circulating pumps, 170 gpm self-priming horizontal centrifugal type, were used to supply cooling water for the refrigerant condensers of the air conditioning equipment and the heat exchangers of the diesel engines of the generator sets. These pumps obtained water from a 30-foot deep well near the station. A 2,200-gallon fuel tank of 3¢-inch steel plate was buried in concrete adjacent to the station, a \%-ton hoist on a monorail was provided in the detector room and a 2-ton chain hoist, 10foot lift on a 12-inch I-beam, was located at the entrance of the station. A total of 1,146 cubic yards of concrete was poured, with an average 28-day strength of 4,300 psi.