PeeS ae CHAPTER II, SECTION 3 Figure 2-112. tower at levels of 25, 150, 175, 200, 225’, 262.5, 275’ and 287.5’. User-furnished fluors and power receptacles were installed on four of the platforms. The User-furnished and installed a mirror at the 200-foot level. Plywood panels 8’ x 8’ painted black were erected in back of the fluors and mirror. Access to each plat- form was provided through the elevator and a ladder. Electrical power was supplied by the island system via a panel located in the tower cab. STATION: PURPOSE: SITE: USER: 3010 Fireball Study Tilda DOD-30 PARTICIPATION: 1 and 2 CONSTRUCTION: 1-18-56/5-1-56 Station 3010 was a reinforced concrete structure ‘5’ x 6’ x 7’ high, inside dimensions. The building was covered with earth over the roof except at the front and rear walls. The rear wall contained viewing ports which were oriented on the Stations 1 and 2 cabs. The User furnished a 3% KW generator. Minus 45 minutes and minus 1 second timing signals were required. A total of 60 cubic yards of concrete was poured for this station. Station 2320 Series STATION: PURPOSE: SITE: USER: PARTICIPATION: CONSTRUCTION: 3011 Fireball Study Sally DOD-30 1 11-8-55/4-30-56 This station consisted of a 12-inch diameter schedule 160 steel pipe extending from the base of a steel recording shelter to a point 10 feet from the underside of the Station 1 cab floor. The steel shelter was embedded in a 24’ x 24’ x 11’-thick concrete slab which provided footings for the tower and an elevator pit for Station 1. The pipe contained 15 instrument gages along its length. The instruments were wired to a recorder in the steel shelter at the tower base. Grout was required inside the pipe and the conduit carrying the instrument wiring was filled with insulating material. Steel access platforms were installed at seven locations along the pipes. A 25’x 25’ area of rock 2 feet deep was placed over the top of the shelter to deflect and absorb blast waves. No power was required. Minus 1 minute and minus 15 seconds timing signals were furnished. Page 2-119