CHAPTER II, SECTION 3 eight 100-foot lengths of 34-inch wire rope and clamps to be installed to the station detectors. STATION: 1310 SITE: Yvonne USER: LASL, EG&G PURPOSE: Recording Station PARTICIPATION: 1, 15, 17, 20, 22, 23, 24, 29, 32, 33, and 34 DESIGN PSI: 50 psi CONSTRUCTION: 11-12-57/4-23-58 above the floor slab, and a 7/16-inch steel boltdown cover plate and angle frame. Three 5-inchdiameter conduits ran from the Pull Box to the Splice Pit. The Splice Pit was a reinforced concrete man-hole type structure having a 5-footsquare by 6-foot high splicing chamber lined with l-inch thick copper plate below a 2%feet-square sandbagged entrance shaft 614 feet high. Thefloor level of this structure was Eleva- tion +5.5. Three 5-inch-diameter conduits were run from the Splice Pit toward the lagoon to the existing beach bulkhead wall opposite. STATION: 1311 Station 1310 required a second-story addition to REDWING Station 1310 for a new SITE: Irene USER: LASL/EG&G PURPOSE: Detector Room 44% feet long with an 11-foot, 10-inch ceiling enclosed by three full-height walls and a partial ceiling-height wall with a roof slab. Wall and roof sections were 5-foot-thick reinforced concrete. A considerable amount of concrete cutting and modifications to the existing earth barricades were incidental to the room addition. PARTICIPATION: 21 Detector Room over existing Room “D.” This addition provided a room space 8 feet wide by The floor plan of Station 1310 provided six utility room spaces, a long entrance passage, and an escape hatch vestibule. A Utility Room was 4214x14 feet and contained two new power centers, a lavatory and water closet, two fresh water storage tanks, station air inlet and exhaust pipes and fans, lighting fixtures, electrical control panels, signal panel, electrical receptacles, and refrigerant and compressor units for dehu- midifier package units. Room “C” was 42\x DESIGN PSI: None CONSTRUCTION: 1-23-58//4-17-58 This station provided a room space 24 feet long and tapered in width from 10% feet to 13 feet, 10 inches; it was housed in a new earthbarricaded reinforced concrete structure. Five 24-inch-diameter steel collimating pipes, 50 feet long, were constructed between the west wall of the station room and a retaining wall support at the end of the pipes. Center-line elevation of the pipes was at Elevation +11.0, and the top of the retaining wall and earth fill was at Elevation +17.0. Access to the station room was through a reinforced concrete tunnel section, 4 feet wide by 6% feet high, under the barricade 12 feet and contained electrical receptacles, signal cabinet, telephone, light fixtures, electric heaters, and two dehumidifier units. Room ‘‘D” 4516x8 feet, contained electrical receptacles, telephone, 2 motor generator sets, copper-clad fill to the station south wall. The roof slab over was 14-inch-thick reinforced concrete. A continuous angle girt detail was anchored to the west wall of the station room above and below the collimator pipe openings to seat 28-inch- faces surrounding the cable entrance ducts, light fixtures, electric heaters, and two dehumidifier scaffolds of wood construction were provided at an instrument control panel, receptacles, telephone, light fixtures, heater and dehumidifier unit, and a 25-kw motor generator set. The De- portable cords, outlet receptacles, signal cabinet, steel wall plates over a portion of the wall sur- units. The Motor Generator Room “B”contained square by \4-inch-thick lead plates. Five detector the ends of the collimator pipes, each 5x214x2 feet high. The station room contained lights on and utility and experimental power panels. STATION: 1312 SITE: Janet mator slide assemblies with a portable hydraulic USER: LASL/EG&G signal cabinet, telephone, and power outlet boxes and receptacles. PURPOSE: Recording Station PARTICIPATION: 2, 10, 16, 25, 27, 28, 30, 37 tector Room Addition included six collimator pipes through the west end-wall, eight lead- shielded openings in the north wall, four colli- lift pump, monorail and hoist, lighting fixtures, In addition to the main structure, provisions were made for make-up of coaxial cables runs to shot stations in the lagoon with a Pull Box and a Splice Pit Structure. The Splice Pit Structure was located closer to the lagoon than the Pull Box. The Pull Box had a 10-inch-thick floor slab and four 10-inch-thick walls rising 12 inches DESIGN PSI: 67 psi CONSTRUCTION: 9-20-57/4-25-58 Station 1312 was the largest scientific construction unit built for Operation HARDTACK. Total structural concrete poured for this structure was 3673 cubic yards. An additional 406 Page 99

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