PROJECT
DESCRIPTION
The project involved
construction of a 115-kV circuit from the new Piti 115-kV
Substation to the Harmon Substation. The project is 13
miles long and was built along urban and semi-urban streets
and roads. The construction included a new 927.2 AAAC 11
5-kV circuit on porcelain horizontal post insulators with
under builds, or provisions for under builds. The under
builds include 34.5 kV, 13.8-kV, secondary and
communications. The power poles for the project are
identified consecutively from Piti to Harmon as # 1 to # 365
respectively.
The Phase 1 is the north most
4.8 miles of the project and includes the installation of
111 new, self-supported, tubular steel poles on
300-foot-long maximum spans. The existing under builds in
this area were transferred to the new poles. Upon the
completion of the Phase 1, it was used to back-feed the
34.5-ky or 13.8-ky circuits to help maintain service while
the construction progressed on specific sections of the
Phase 2. The Phase 1 includes the work from Pole # 201 to
217, inclusive, and Pole # 257 to 352, inclusive. |
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The Phase 2 is 8.2 miles long
and consisted of constructing new 115-kV on the top of the
223 existing concrete poles. The span lengths in this
area generally do not exceed 200 feet. The existing
34.5-kV and 13.8-kV circuits and other under builds were
rearranged and lowered on cross arms, and the 115-kV
insulators were mounted to newly fabricated steel pole-top
extensions. The 34.5-kV circuit in the majority of this area
will be changed to 927.2 AAAC. Included in the Phase 2
construction is the supply and the installation of 33
additional steel poles, the foundation modification of the
existing 91 non-guyed octagonal concrete poles and the
construction of pole foundations for the 18 octagonal
concrete poles at the Agana swamp. The installation of
a guardrail system on various pole locations is also
included.
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