CHAPTER II, SECTION 3 The baffle structure was located approximately 500 feet southeast of the platform and of construction identical to the baffle frame for Station 1528.01. STATION: 1610 SITE: Yvonne USER: LASL/SC PURPOSE: Instrument Bunker PARTICIPATION: 1, 15, 20 DESIGN PSI: 70 psi shielded coaxial cables and for a field telephone circuit. The corridor contained the magnetic starter for the motor generator sets, the portable lighting equipment, and the service power receptacle. A common battery-type island telephone was wall-mounted in the corridor. STATION: 1612 SITE: Yvonne USER: LASL PURPOSE: Detector Station and Pipelines CONSTRUCTION: 2-10-58/4-20-58 PARTICIPATION: 20 Station 1610 was provided by modifying and adding to REDWING Station 3020. This afforded a clear room space in the formerstation DESIGN PSI: enclosed with copper screening around the wall perimeter, two User-furnished motor generator sets, portable outlet receptacles, lights, and signal panel. Outside the former station wall to the south, a re-inforced concrete tunnel maze termi- nated at an entrance blast door. Wing walls retained earth barricade fill areas surrounding the tunnel. Two 24-inch-OD steel pipes were provided through the station south end wall under the barricade fill to provide ventilation air from an air-conditioning unit situated in a new Mechanical Equipment Room 30 feet from the station. The Mechanical Equipment Room was of wood frame construction, 15-foot-square in plan, 10 feet high, with a 4-inch concrete floor slab, exterior plywood sheathing, and flat roof with built-up composition roofing. A concrete slab area, fenced with wood posts andrails, ad- joined one end of the Mechanical Equipment Room. A Trigger House of wood frame construction, 4-foot-square in plan by 4% feet high was also provided and was situated 10 feet off the line of sight between Stations 1310 and 20. A 4-inch conduit run extended from Station 1610 to the Trigger House for coaxial cable. Power was obtained from the 4160-v, 3phase, 60-cycle island power distribution system by tapping the 3°'C+25-kv cable which passed this location. The Mechanical Equipment Building con- tained the following electrical equipment: Signal Terminal Cabinet, Telephone Terminal Cabinet Panel “PA” and Panel “LA.” Panel “PB” was mounted outside on the South Wall. The main station structure consisting of the corridor and the Instrumentation Room contained the following: The Instrumentation Room had two 20-kw motor generator sets, Userfurnished. The entire room was copper screen shielded with special enclosure about the motors of the motor generator sets. This room was the terminus of the fourteen %-inch aluminum- None CONSTRUCTION: 2-15-58 /4-23-58 A re-inforced concrete detector structure and two segments of six.radial pipelines comprised this station. The pipelines diverged from a radial center at the Station 20 work point and terminated at the detector structure wall. The lines of the first segment terminated at a retaining wall approximately 242 feet from the Detector Station. Thence, beginning at a re- taining wall separated by 4 to 5 feet from the first wall, a segment of six radial pipelines extended to a retaining wall 17% feet distant from the work point of Station 20. The first segment of pipe was supported on a vertical steel plate and post detail at intervals throughout its length. One edge of the plate was anchored to a retaining wall also on a radial alignment and adjacent to the lagoon-side pipe; the other edge was supported by a steel post on a concrete footing pad. The second segment of the pipelines was supported on a steel upright extending from a transverse steel beam and post frame detail supported on concrete spread footings. Spacing of the support frames was 15 feet. The pipeline segments were buried in fill throughout their lengths. The Detector Station provided a room space, 2924 feet long, 3 feet wide, and a 61%4-foot ceiling height. The foundation slab was 2 feet thick, the north wall toward Station 20 was 4 feet thick, other walls were 1% feet thick, and the roof slab was 2 feet thick. The structure had an 814-foot-deep earth fill barricade over the roof. Access to the Detector Room was through a wood frame tunnel over a concrete floor having plywood sheathing over wall studs and roof joists. The six pipelines terminated 12 inches inside the north wall face. The wall section was blocked out to form a 2-1/6-foot-square opening, 3 feet long at the end of each pipeline, and the perimeter surrounding the walls of the blockout section were lined with 1-inch-thick micarta. Three rows of convex-shaped lead brick were placed to fill the opening against the pipes. Page 109

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