CHAPTER II, SECTION 3
mation the working point coordinates were computed by the Contractor. Due to the function
of each station, location was established within
second order accuracy (1:10,000). In the case
of Stations 1811, 1812, 1813 and 1819 (pipe-
lines) the User required a line of sight through
the pipes. In order to accomplish this, the elevations were corrected to compensate for the
curvature of the earth. These values were computed and recorded to indicate the various
points on these stations and to show the actual
and corrected values for elevations.
Criteria for vacuum pumping stations required a continuous flow of cooling water be
maintained for the pumps in the event of power
failure or when closing any water pump. To
accomplish this, a pressure tank system for each
vacuum pump wasdesigned, using a pump with
a 127-foot head at zero delivery and putting an
orifice in the tank discharge for restricting the
flow to the required minimum amount of water
with a pressure head of 35 feet. The total quantity of water flowing for five minutes was arbi-
tarily chosen as approximately 100 gallons in
order to size the storage tank.
Stations 1812 and 1813 had noelectrical
installations. Stations 1814, 1815, 1816 and
1819 each had one local phone on a common
loop. Power was supplied to Station 1841 from
Station 1310 through a 4-inch conduit with
three #500 MCM conductors which were installed from the utility unit substation in Station 1310 and terminated in a powerpanel within Station 1841. Power for Station 1817.02 was
supplied from a 112.5 KVA, 3-phase, 4,160120/208-volt transformer located near Station
24, through a 2-inch conduit with #4 conductors which terminated in power panel “PA” within the station. Power to Stations 1818.04 thru
.07 was supplied by a 1%-inch conduit with
four #4 conductors from a 45-KVA, 3-phase,
4,160-120/208-volt transformer located near the
subject station and terminated in a 120/208volt, 3-phase, 4-wire, lighting panel “LA”. Power
to Station 1818.01 was supplied from a transformer in Station 1524 through four #2 direct
burial conductors. Stations 1818.05 and .06 were
fed
by
45-KVA,
3-phase,
4,160-120/208-volt
transformers located between Stations 1818.03
and .09 through four #2 direct burial conductors which terminated in lighting panel “LA.”
The electrical work for Station 1818.09
was the same as for Station 1818.06, except
that the station was fed from a 15-KVA, 4160120/208-volt, 3-phase transformer which was installed 30 feet from the south wall of the statier. No timing signals were required.
‘The cubic yards of concrete poured for each
station were as follows: Station 1811, 310 cubic
yards; Station 1814, 39 cubic yards; Station
1815, 99 cubic yards; Station 1816, 166 cubic
Page 2-106
yards; Stations 1818.01 thru .09, 1818.02 and
1841, 104 cubic yards and Station 1819, 4 cubic
yards.
Prior to shipping the pipe overseas, the
interiors were grit-blasted and cleaned with acetone, then blown with hot air to ensure clean
and rust-free pipe. The interiors of the pipe
were fitted with a square paper tube impregnated with a rust inhibitor and the pipe ends
were then capped and sealed. On arrival at the
Jobsite the pipe was inspected and found to be
clean and free of rust. However, while stored in
the pipe yard awaiting installation, moisture
collected inside the sealed pipe and rusting
started. The pipes had to be again grit-blasted,
cleaned with acetone, and blown with dry air,
then recapped until they were required for reinstallation. A shortage of grit at the Jobsite
required that 12 tons be airlifted in order that
the work would not be delayed.
STATION:
PURPOSE:
SITE:
USER:
PARTICIPATION:
CONSTRUCTION:
OCCUPANCY:
1830
Camera Station
George
DOD-18
11 and 13
12-12-55/5-5-56
3-12-56
Existing CASTLE Station 1550, a twostory heavily-reinforced concrete structure was
rehabilitated and modified to provide for Station 1830. The lower floor contained generators,
dehumidification equipment, telephones, timing
cables and a signal system. The upper floor
contained cameras which were sighted through
three drop-type blast doors. The generator engine exhaust, dehumidifier intake, and outlets
were closed by blast doors with a tensioned
spring closing device.
A new dehumidification unit was installed,
corroded fuel lines were replaced, and a fuel
tank was buried adjacent to the building. The
drop-type blast doors operated satisfactomly
after new gaskets were installed and the latches
overhauled. The blast doors operated by tensioned springs after release by a built-in blast
link proved to be unsatisfactory. Therefore, a
frame constructed of a 60- pound rail was welded to the outside of the door frames in such a
way that the doors could be released by blast
links held in tension between the frame and the
door. This method worked satisfactorily.
Power requirements were 27 KW, 208-volt,
3-phase. Timing signals plus a zero test signal
were provided. Construction started 12 Dec-
ember 1955, beneficial occupancy was provided
on 12 March 1956, and completion was effected
on 5 May 1956. Final completion of the Station
was delayed due to a shortage of plumbing and
electrical fixtures.