CHAPTER II, SECTIONS 6 and 7 Figure 2-223. Ruby to Sally Causeway During the storms of November 1953, high tide wave action caused considerable erosion of the causeway fill and threatened the pipe supports. On 9 December 1953 additional construction was approved for protection of this causeway. Work was started immediately and consisted of driving steel rails on fourfoot centers, to an elevation of plus 10.0 feet, with three-inch by 12-inch planking laid horizontally behind the rails, then back filling with coral. This bulkheading was completed on 18 January 1954 and proved adequate. GENE - IRENE CAUSEWAY Figure 2-224 notes the conditions existing on the IVY Flora to Irene causeway prior to the CASTLEtests. SECTION 7 INTERISLAND CABLES CONTRACT ITEM A-29 BIKINI ATOLL erations at the Jobsite, the cable had to be for future installations to lay cables in shallow cut at two widely separated points so that it could be brought to the surface. The two cut ends were then reconnected by splicing in additional cable to replace the lost section. In laying cables it was a far simpler operation to buoy the end of the cable in shallow water at the completion of the days work, than in deep 105 for OPERATION IVY,it was found fouled around a coral head in 200 feet of water and it could not be freed. As this depth of water was beyond allowable limit for deep sea diving op- cable was laid in shallow water simplified recovery operations. The laying of cable in shallow water had the further decided advantage in eliminating the need for deep sea diving operat- Experience gained during previous test op- erations with the installation, testing and re- pairing of submarine cables laid in deep water indicated that it would be more advantageous water (20 to 30 feet). In checking cable No. Page 2-224 water. When buoys were lost, the fact that the