CHAPTER Il, SECTION 3 STATIONS: 178.01 through .36 STATION: 182.01 SITE: Yvonne SITE: Yvonne USER: DOD/BRL USER: DOD/SRI Pressure-Time PURPOSE: Power and Recording Shelter PURPOSE: Measurement PARTICIPATION: 1, 15 PARTICIPATION: 20 DESIGN PSI: DESIGN PSI: None CONSTRUCTION: 7-7-58,;8-2-58 CONSTRUCTION: 3-3-58/4-18-58 Stations 178.01 through .13 were single- ground baffles. Each of these stations was a concrete block 4 feet square at the base, 2 feet square at the top by 2 feet deep, and had a well in the center to house gage cannisters. Stations 178.14 through .21 None were gage towers. Each gage tower consisted of two 3-inch diameter Schedule 40 pipes tied together with a lattice of 3/16x3-inch steel bar and projected 314 feet above a concrete footing 2x5x2 feet deep. Stations 178.22 through .36 were Userfurnished and installed. Adapted from existing GREENHOUSE Station 57, this structure was 14x27x10 feet high, with 4-foot-thick roof and end walls, 5-foot- thick front wall, and 2-foot-thick rear wall and floor. Entry was through an exterior concrete vestibule having 2-foot-thick walls and slabs. New construction consisted of shoring the roof of the vestibule with a steel beam and two pipe columns and providing a wood tunnel, 3144x614 feet clear and 26 feet long, for access through an earth fill which was placed to the roof level of the structure. STATION: 182.02 SITE: Trene STATIONS: 180.01 through 180.03 USER: DOD ‘SRI SITE: 180.01 - .02, Helen; 180.03, Irene PURPOSE: Power and Recording Shelter USER: DOD, SRI PARTICIPATION: 21 PURPOSE: Ground Motion Study DESIGN PSI: None PARTICIPATION: 21 CONSTRUCTION: 3-3-58/4-18-58 DESIGN PSI: This station, existing IVY Station 600, was a two-room concrete structure 14x28x12 feet None CONSTRUCTION: 2-7-58/4-24-58 Each of these installations consisted of two 6-inch-diameter, 100-foot-deep holes spaced 35 feet apart. Temporary 6-inch pipe casing was provided with lugs to withdraw the casing. One hole at each station contained a concrete well head, 6 feet square by 144 feet deep, in which the User embedded an instrument assembly at the top of the pipe. STATIONS: 181.01 through 181.03 SITE: Yvonne USER: DOD/SRI PURPOSE: Ground Motion Study high. Walls and slabs were 3 feet thick. New construction consisted of placing plywood cover over the walls and slabs of the larger room, new electrical receptacles, and wiring. Power was sup- plied through a drop cord from a 5-kw, 110-v generator located outside the building. The structure was earth-covered with sandbag retaining walls provided at the sides of entry. STATIONS: 190.01 - .02 SITE: Helen, Yvonne USER: DOD/AFSWC PURPOSE: Determination of Soil Loading and Attenuation PARTICIPATION: 20 PARTICIPATION: 190.01 - 21; 190.02 - 20 DESIGN PSI: DESIGN PSI: None CONSTRUCTION: 3-11-58/4-20-58 Construction of these stations was identical to that of Stations 180.01 through 180.03. None CONSTRUCTION: 2-27-58/4-20-58 Each of these stations consisted of User- furnished drums placed throughout an excavated Page 83

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