VO Figure 2-88. CHAPTER II, SECTION 3 Station 1524 - 60% Complete for the vacuum pumps was supplied from a well located on high ground because the water on the reef was filled with sea moss. The station was located and oriented in accordance with Usercriteria. This required the construction of man-made island and a causeway connecting to site Yvonne. This construction is further discussed under Causeways, Section IV of this chapter. Powerfor Station 1524 was supplied by 3+ 4,0 KV direct burial cable from a transformer at Station 1818.09 and terminated in a power center in Station 1524 consisting of primary distribution oil fuse cutouts 5,000 volt, 3-phase, 100-amp gang-operated, and a 300 KVA oilfilled transformer with a 4,160-volt primary and 120/208-volt, 3-phase secondary. The unit also consisted of a low voltage panel with three 300amp trip, 3-pole circuit breakers. This power unit was installed in a transformer room. Other equipment in the room consisted of two distribution panels, PA & PB, a signal cabinet, a telephone cabinet, and an EG&G relay. Various lines in conduit were provided for pumps, floodlights, general lighting signals, and phones. Forms for the bases of the bent systems were prefabricated then set on the reef at low tide. Two transit mixers were removed from their truck chassis and mounted on trailers. This eliminated considerable down time for maintenance of trucks and permitted working during higher tide levels than would otherwise have been possible. All welders used on the pipe arrays were first qualified for this work. The work was accomplished in two shifts. The first shift was used to erect pipe bents, position and align the pipe, then tack weld the interconnecting collars. Masking tape was then placed over the joint to keep out moisture; the night shift completed the welding of the pipe system. When the sys- tem was completed and tested, no leaks because of weld failures occurred; a few leaks were found in the pumping system. After the leaks were repaired no difficulty was experienced in maintaining the specified vacuum. Page 2-99