380
RADIOLOGICAL CLEANUP OF ENEWETAK ATOLL
FIGURE 7-41. AOMON SANDBAR DREDGING. -
extended approximately 500 feet into the lagoon. The size of this sandbar
and the low capacity of the sand dredge made dredging in this area
infeasible. After several brainstorming sessions in the JTG, it was decided
to use a four-section causeway (360 feet) to bridge the majority of the
sandbar from the shore. Under this scheme, dredging was only necessary
to clear a portion of the sandbar and to clear a turnaround area for
watercraft at the end of the causeway. This dredging operation was
successful and was completed on {6 May 1979 (Figure 7-41). H&N
operators wereassisted in the operation by USNE personnel. Figure 7-42
i
showsthe area cleared with the sand dredge and the road system which
was developed for the Aomon Crypt project.
Between the new loading area and the AomonCryptstockpile, there was
an area of soft sand which could be traversed only by theall-wheel-drive 5ton dumptrucks. The inability to use the larger capacity 20-ton dump
trucks would delay soil removal and containmentoperations. To overcome
this problem, the USAE constructed a soil-cementroad to the loadingsite
and a turnaround area which allowed the use of the larger capacity
vehicles.
A second problem developed in using the new loading location forsoil
from the Aomon Crypt. The causeway section was not designed to mate
with either the LCM-8 or the LCU. The Boat Transportation Team was