Overview
The work at Vandenberg Air Rorce Base varied greatly from installing
impavement runway fixtures, to hoisting two 72,000-pound substation
buildings into place, to building 2.7 miles of 12 kV, 715.5 kcmil,
3-conductor power line underneath an existing line. The U.S. Army
Corps of Engineers administered this work under an IDIQ contract.
The following is a description of the
many projects at Vandenberg AFB:
Repair Runway Lighting – This
job involved replacement of 310,000’ of 5 kV FAA cable,
88,000’ of
600 volt wire and control cable, 32 elevated threshold fixtures,
304 inpavement
runway end fixtures, 242 steady burn approach fixtures, and
sequential flasher approach system.
Power Alley Phase I and
II – This
job consisted of replacing three 12 kV overhead lines with
underground feeds, including
4,800’ of eight-way six-inch concrete encased ductbank,
eleven 6 x 8 x 8 manholes, ductbank and concrete pads for
three G & W SF-6 type switches. This entailed pulling
in and the termination of over 100,000’ 250 / 500 MCM
15 kV cable and the demolition of close to three miles of
12 kV overhead
line.
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Repairs
to Military Family Housing – The
work completed on this project is the installation of disconnects
to 61 residential pad-mount transformers, which will give the USAF
maintenance personnel the ability to disconnect individually the
power to 336 homes. Also completed is the pulling in of 12,800’ of
500 MCM 15 kV cable into existing manholes and ductbank, along
with the demolition of an equal amount of 1 / 0 15 kV cable.
Replacement
of Substation 10 A / B – The location of this project
is a quarter mile from the Pacific Ocean. The job was to replace
two 12,470 / 480 volt substations
that were on the verge of failure due to damage from the saltwater
environment, with new Square D substations enclosed in two buildings,
each 16’ wide, 38’ long, 12’ tall and weighing
36 tons and each sitting on 3’ stem walls tied together by
4,000 amp bus duct.
12 kV UnderBuild Line – This
is a companion project of the Power Alley jobs and the work consists
of 2.7 miles
of 12 kV, 715.5
kcmil aluminum, and three conductor powerline, built onto poles
that support an existing 69 kV line. Also included are six 50’ tall,
6” riser poles, two road crossings, 2,100’ of ductbank,
20,000’ of 300 / 500 MCM 15 kV cable and the demolition of
unneeded pole line and ductbank.
Replace Transformer at Substation
A – This job involves the
replacement of a 69 kV, 12.5 MVA power transformer at one of Vandenberg’s
main substations.
Relocate 69 kV and Control Lines – This
contract consists of eight miles of 69 kV, 740 kcmil aluminum,
three conductor powerline,
128 wood poles varying from 45’ to 90’ in length, four
steel towers each 120’ tall, 84,000’ of control cable,
ground and guy wire. Equipment required to do this job was extensive
as well. Cranes, track hoe, auger trucks, four-wheel drive pickups
and bucket trucks etc. |
