CHAPTER II, SECTION 3 Station 2270 was a concrete structure, 9x10x10 feet, with 3-foot walls and slabs. The top of the structure was set flush with grade and had provision for entry through a domed steel hatch cover in the roof. Sandbags were placed to a height of 3 feet above grade for additional protection. The front wall contained a 4-inch pipe sleeve with special fittings to connect a 4-inch vacuum hose for cables to the barge site. ladders to this extension and the roof were provided. The existing 14-inch steel bracing beams, which supported the top story for horizontal loads, were protected from the sun to minimize deflection of the building caused by temperature change of the steel beams. This was accomplished by installing plywood panels, painted gloss white, over the length of each steel beam. A two-walled timber and pile bulkhead were included at the side of the building to protect a 60-kw generator from possible wave damage from lagoon events. The bulkhead was 22x30 feet constructed of 4-inch timbers braced 5 feet on centers. One wall of the bulkhead terminated at the corner of the generator room in the rear, and the other wall terminated at the toe of the return on the new earth-fill at the front. Of two existing 35-kw generators originally located in the station, one was installed as stand- by power. The other unit was replaced by an out- side 60-kw generator located in the bulkhead area. The power and existing air-conditioning were shut down by remote timing signal. Mechanical modifications were accomplished to provide a more efficient drop-door snubber sys- tem and to provide new salt water pumps for the air-conditioning system. (Neg. No. W-V-212-4) Figure No. 2-61. Station 2270 — 80% Complete. STATION: 2300 SITE: Peter USER: UCRL PURPOSE: Scientific Photo Bunker STATIONS: 2410.01 through .03 SITE: Fox USER: UCRL PURPOSE: Phonex Collimators PARTICIPATION: 8, 9 DESIGN PSI: None PARTICIPATION: All Bikini Events CONSTRUCTION: 3-9-58/4-18-58 DESIGN PSI: Earth-barricaded timber structures 12x15x8 feet high comprised these stations. The walls None CONSTRUCTION: 11-15-58/4-26-58 REDWING Station 2300 was used for this bunker station. In addition to the rehabilitation of the station, a 12-foot-long concrete extension of the third floor outside the 20-foot drop door was provided for the width of the building. To insure minimum deflection of the extension and non-expendability, the extended level was designed as the top of a concrete box with front wall, side walls, and two interior cross walls all supported on a mat foundation located on top of an earth fill built up to the second-floor level. The structure was integrally tied to the existing re-inforcing steel of the building. A canvas-covered pipe frame sheltered the exterior third-floor level. The pipe frame was designed to be non-expendable. A 14-ton jib crane was provided at one end of the new extension and was mounted on the structure wall. New access Page 120 and roof were framed with heavy timbers to support the retained earth. A rear entry tunnel of timber construction provided access through the fill. The tunnel was 4 feet wide, 8 feet high, and was L-shaped for lengths of 8x24 feet. A 22-foot-long wood tunnel port provided a view through the front of the fill from the center of the structure. The interior of the tunnel was 20 inches square for a 12-foot length and 36 inches square for a 10-foot length. The flocr of the rear access tunnel was a 6-inch slab thickened at the edges. The floor of the main structure was 3 feet thick and contained two troughs for access to vertical lift jacks. These User- furnished jacks adjusted a User-furnished col- limator block that was provided with lead brick shielding on the sides and top. Two steel braces were anchored in the floor slab and braced the collimator against movement from overpressure.