Lf CHAPTER Il, SECTION 6 Figure 2-222. Ruby to Sally Causeway - Primary Grading Charlie pipeline causeway. To meet this requirement it was necessary to dredge the reef 700 feet west of site Able and provide a working area slightly over 0.5 acres in area at an elevation of plus 8.5 feet. This was known as site Delta. The causeway location is shown in Figure 2-220. Figures 2-217 and 2-218 note this site (Delta) and status of work on 12 August 1953. The development of site Delta, with progress photo- graphs, is reported under Station 1341. Stations 1341, 1352, 13854, 1855, 13856, 13857, 1401, 1402, and a number of scientific tents and trailers were located within this area. The perimeter of the working area was bulkheaded with a three-inch thick timber bulkhead supported by 60-pound used rail driven on four-foot centers, without tie-backs. A mole for landing craft approximately 250 feet long, and a 25-foot wide access road connecting the working area with site Able were also provided. ENGINEERING. The location was selected by Field Engineering on the basis of providing minimum construction cost; a detailed layout of ber 1953 the causeway and work area were in use for Scientific Station construction. Final completion was on 17 October 1953. RUBY - SALLY CAUSEWAY GENERAL. In March 1953 it was established that a vacuum pipe array, approximately 2700 feet in length, would be required connecting a new station on site Ruby with a Station proposed for construction adjacent to an existing Station on site Sally. It proved possible to so locate the pipe array that, with minor widening only, an existing access road approximately 1000 feet long between Ruby and Sally could be used both as an access road and as a pipeline causeway. ENGINEERING. Criteria for location of the pipeline and pipeline causeway were finalized in the Home Office in March 1953. The location was then reviewed in the Field to insure most effective utilization of the existing causeway. Drawings showing the causeway and pipeline facilities at this location was provided by the Home Office. Field Engineering processed the necessary work orders, surveys and inspection of construction. layout were approved in May 1953. Field Engineering processed the necessary work orders, surveys and inspection of construction. Figure CONSTRUCTION. The work of dredging began as a marine operation on 17 July 1953. CONSTRUCTION. This causeway was approximately 60 feet wide and carried a pipe array with ten-foot wide supports, a 24-foot wide access road with safety shoulders, and rightsof-way for power, telephone and coaxial cables. Shortly thereafter, a field kitchen and several tents were set up on Able. This provided noon feeding facilities, which later developed into a small temporary camp for both construction and scientific personnel and minimized the time lost in commuting to and from the construction camp at site Charlie. Figure 2-219 shows this camp with a helicopter landing mat and status of work as of 5 February 1954. As of 26 Septem- 2-221 shows the causeway location. Placing of additional causeway fill was started late in July 1953 and completed early in August, ready for construction of the pipe array. Figures 2-222 and 2-223 show this work underway. Page 2-223