382 RADIOLOGICAL CLEANUP OF ENEWETAK ATOLL able to design a marriage block which allowed the LCU to connect with the seaward end of the causeway. However, the LCM-8 was too low and could not be married to the causeway; so, it was not used for this effort. The causeway section was anchored on the shore with 8-inch H-beams driven into the beach and anchored on the seaward end with two H-beams secured to the causeway to allow it to rise and fall with the tide. The time constraints imposed by the need to movethe soil to Runit ina timely manner to avoid a slow-down in crater-containment operations required expeditious accomplishment of the total effort. This entire transport system was completed on 19 May [979 and is depicted in Figure 7-43. The first soil removal using the 360-foot causeway system was scheduled to begin on 19 May. The first 20-ton truck to negotiate the causeway and attempt entry into the LCU met with mishap and lost a radiator as the truck backed onto the LCU from thefreefloating causeway. Another modification—the welding of intermediate ramps to the deck of the LCU to allow for proper transition between the causeway and the LCU—was made in less than 24 hours (Figure 7-44). On 20 May, soil transportation was in full operation. The soil transported, using LCUsin the bulk-haul mode, totalled 9,776 cubic yards, and the operation was completed on 19 June 1979. t FIGURE 7-43. AOMON CRYPT SOIL LOADING SYSTEM.