CHAPTER Il, SECTION 3
locations by means of a four-direction, winch-
These stations were constructed on U.S.
Army-type BC barges 120 feet long and 33 feet
wide. Each station consisted of a T-shaped cab
controlled anchorage system. A helium tunnel was
added to Barges 3, 6, 7, 8, 9, and 10. This tunnel
was of wood frame construction, 8-foot-square
by 22-feet long, and was covered by a Userfurnished plastic lining to make the structure
gas-tight. Power was furnished by two 20-kw,
extending through the hull to a point at the
bow approximately 20 feet under the water, a
caisson for access to the underwater end of the
such a way that either generator could furnish
power to the instrument panel. The lighting
a shelter to provide access to the pinhole. All
super-structures on these barges were designed
the load on this panel could be dropped.
at Site Janet while moored off Yvonne. Since
STATIONS:
11, 12, 18, 29, 32, and 34
SITE:
Stations 11, 12, and 13, off
Tare; Stations 29, 32, and
34, off Yvonne
almost identical to Stations 29, 32, and 34, all
were designed alike. The cab was of heavy timber
120/208-volt, 3-phase generators connected in
panel was connected so that on a timing signal
USER:
PURPOSE:
UCRLfor Stations 11, 12,
and 13; LASL for Stations
29, 32, and 34
Zero Stations
PARTICIPATION: 11, 12, 18, 29, 32, and 34
DESIGN PSI:
0.75 psi
CONSTRUCTION: Sta. 11, 1-25-58 '5-9-58
Sta. 12, 1-11-58 6-28-58
Sta. 18, 1-11-58 7-22-58
Sta. 29, 1-30-58 5-27-58
Sta. 32, 2-20-58 4-18-58
Sta. 34, 1-15-58, 5-12-58
cantilevered over the stern, a collimating pipe
pipe, a ready room for operating personnel, and
to survive equivalent overpressures from events
design features of Stations 11, 12, and 13 were
construction, 17 feet 6 inches long, 18 feet wide,
and 10 feet high, with two small sections cut
from the corners to provide room for the anchoring winches. A removable hatch 9x13 feet was
located over the cab roof opening and a 2-ton
bridge crane just outside the cab was provided
for leading and moving equipment in the cab. A
large double door provided entrance to the cab.
In the cabs of Stations 29, 32, and 34 a U-shaped
concrete shield was constructed to collimate the
line of sight to Station 1310. The shields varied,
but in general they were 1 foot, 6 inches thick
9 feet high, and 10 feet long. Each shield had
one or more block-outs for adjusting the collimating pipes. An angle iron frame was installed
on the working point side of the shield for ad-
justment of a small 3x7-inch square lead defin-
N
(Neg. No. W-V-208-12)
Figure No. 2-21.
Page 68
Barge Station 3— 65% Complete.