RMI Nuclear Justice Documents

located.

The outer tank was filled with water.

The volume of water surrounding the device

was about 1.5 x 10‘ ft®, corresponding to a mass of 9.6 X 10° pounds.
5.

Results of drilling logs for Sites Yvonne, Helen and Irene are shown in Tables 2, 3, 4, and
These logs were the best available information of the nature of the soil conditions in which
TABLE 2

SITE YVONNE DRILLING LOG, STATION 181.03

Coordinates: North, 105,618.17; East, 124,611.56.
Depth, ft

Description

1
8
16
23
32

to
to
to
to
to

8
16
23
32
45

Soft sand.
Hard cemented sand.
Soft cemented coarse sand with hard layers.
Soft cemented sanda with shells.
Soft cemented sands with shelis and hard layers.

45
50
58
62
72

to
to
to
to
to

50
58
62
72
108

Hard cemented sands with shells.
Hard cemented sands with shells.
Soft cemented sands with hard layers.
Soft cemented sands andshells.
Soft cemented sands and shells with hard layers.

the Cactus and Koa craters were produced. Additional information on soils in the EPG area
can be found in References 1 and 4. Seismic measurements were made on Sites Yvonne and
[rene by Project 1.8 and are discussed in Reference 9.
RESULTS
Data presented in this report are divided into crater dimensions from land shots, Table 6;
crater dimensions from barge shots, Tables 7 and 8; lip dimensions, Table 9; and ground de-

pression measurements, Table 10.

DISCUSSION
The influence of soil characteristics and wave action on crater dimensions has been developed
and discussed in the background and theory section. The following discussion points out their
TABLE 3

SITE HELEN DRILLING LOG, STATION 180.01

Coordinates; North, 149,360.00; East, 73,120.00
Depth, ft
1 to 10

10 to 20

Description
Sand.

Cemented soft sand.

20 to 30

Cemented rubble, medium hard.

30 to 50

Cemented rubble, soft.

50 to 70

Cemented rubble and shells.

70 to 80
80 to 108

Cemented shells, soft.
Cemented rubble, soft.

apparent effect on the craters measured during this operation and through adjustments compares

the results with the curves given in TM 23-200.

Scaled dimensions iisted in this report, unless

otherwise specified, are scaled to 1 kt of nuclear yield.
Crater Dimensions, Shot Cactus. The Cactus device was detonated on the northwest end of
Site Yvonne near the Shot Lacrosse crater and like Lacrosse was considered to be an unwashed

19