Chapter 3 Proposed high voltage electrical distribution upgrade, Liverpool
Military Area, NSW
The Department of Defence (Defence) proposes to upgrade the electrical
supply and distribution within the Liverpool Military Area (LMA), NSW. The
proposed upgraded distribution network at Holsworthy Barracks will provide
sufficient redundancy to support existing infrastructure as well as the planned
The purpose of the project is to upgrade the electrical supply and
distribution infrastructure within the LMA, to ensure a stable and adequate
supply to service growing demand.
The cost of the project is $19.6 million, excluding GST.
This proposed construction project was referred to the Committee on 20 June
Conduct of the inquiry
Following referral to the Committee, the inquiry was advertised in The
Australian on 27 June 2012.
The Committee received one submission and two supplementary submissions
from Defence, and two confidential supplementary submissions detailing the
project costs. The list of submissions can be found at Appendix A.
The Committee received a private briefing and conducted a public hearing
and an in-camera hearing on the project costs on 8 August 2012 in Sydney.
A transcript of the public hearing and the submissions to the inquiry
are available on the Committee’s website.
Need for the works
The need for the project is as follows:
n blackouts are
currently occurring at a rate of more than one per week due to deficiencies
within the LMA electrical power supply system
n power requirements in
the LMA are predicted to increase with future development
n if an electrical
power supply is not secured, the LMA will not be able to support Defence
Within Holsworthy Barracks, there has been an average of 1.72 power
outages per week in 2012. This has increased from 0.94 per week in 2010 and
1.15 per week in 2011.
Currently when a power outage occurs, the LMA has limited capacity to
switch to local emergency generator systems to provide backup power supplies:
… diesel powered generators, will kick in and provide power
until power is restored. That is on the critical-capability elements. But the
rest of the base is like the rest of the country: when the power goes out, you
work in a blackout environment and you wait for it to come back on.
Blackouts can be caused by outages within the LMA or in Endeavour
Energy’s system. The majority of outages are within the LMA network and are
This project will address blackouts caused by outages within the LMA by
increasing redundancy in electrical infrastructure within the base. The project
will not prevent blackouts due to outages in Endeavour Energy’s system as it supplies
all the power for the base through a single entry point.
The project will upgrade the electrical supply, connection and
distribution system within the LMA to ensure that a stable and adequate
electrical supply is available to service the growing demand to 2030.
However, Defence would still require backup diesel generators in the
event of a blackout in Endeavour Energy’s system. In the long-term, Defence is
looking to provide redundancy in supply to the base to address this issue.
Defence explained its estimated future electrical requirements within
Defence’s overall demand for electrical power within the LMA
is therefore forecast to grow to 28 MVA [mega volt amps] (with 8 MVA required
for the new DNSDC [Defence National Storage and Distribution Centre] site at
West Wattle Grove and 20 MVA required for Holsworthy Barracks). This includes
allowances for the forecast demands for future projects and a 3.5 MVA reduction
due to the vacation of the Moorebank sites as part of the DLTP [Defence
Logistics Transformation Program] and MUR [Moorebank Units Relocation]
projects. A 2 MVA increase for additional growth within Holsworthy Barracks out
to 2030 has also been included.
Noting that the maximum electrical power supply that can be
provided to Defence from its supplier is currently 13.5 MVA, this then leaves a
deficit of 14.5 MVA, which if not provided through [this] project would result
in the requirement for Defence to provide the additional supply through
generators, similar in nature to a Central Emergency Power Station (CEPS).
Defence stated what would occur if the project did not proceed:
… essentially we are now at capacity in terms of the supply
that we have coming into the base versus the demand that we are generating on
the base. If this project were not to proceed then the new projects that we are
looking to undertake on the base downstream will be without power, and as a
result we would need to provide a temporary power solution, which would likely
be in the form of generators. I am advised it could be in the vicinity of some
$250,000 to $300,000 per month to provide the sort of level of power that we
Defence stated that there would be no immediate impact if the project
did not proceed. However, proposed future works, development and growth within
the LMA in the next four years would exceed the available power supply from Endeavour
Energy and the existing connections.
Defence confirmed that if the project did not proceed, it would severely
restrict Defence’s future plans, which are already in place and are a necessary
part of defence planning.
The Committee is satisfied that there is a need for the works.
Scope of the works
The project will deliver a new 33 kilovolts (kV) electrical supply to
the LMA and improved electrical infrastructure within Holsworthy Barracks:
n construction of two
Intake Switching Stations (ISS) that receive the electrical supply at 33 kV and
house transformers to convert the supply to 11 kV and relevant equipment
(switchgear) to control distribution of the electrical power within the base
n construction of an 11
kV interconnecting cable between the two ISS to provide redundancy within the
electrical distribution system
n reconfiguration of
the existing Holsworthy Barracks distribution system into seven separate ring
mains to balance the load on each ring main and provide redundancy within the
electrical distribution system
n design for the future
installation of a Power Control and Monitoring Systems (PCMS) and Central
Emergency Power Station (CEPS) to enable greater flexibility of electrical
supply and the provision of emergency power to critical base assets.
The majority of the current electrical distribution network is
aboveground and prone to falling during storms. The new system has been
designed to be belowground where possible.
Defence confirmed that no new work will be undertaken aboveground,
although some existing aboveground infrastructure will be used:
Ring mains 1, 2, 3, 4 and 5 will all be underground. For ring
main 6, which services the southern area, approximately half will be
underground and half will be aboveground as part of the legacy. The majority of
ring main 7 will be aboveground.
Subject to Parliamentary approval, construction is planned to commence
in January 2013 and be completed by mid-2014.
The Committee finds that the proposed scope of works is suitable to meet
Options considered to meet the need
In determining the scope of the project, Defence considered various
supply, connection and distribution options.
Defence stated that capability was the primary consideration when
deciding how the project would deliver the objectives:
Essentially the requirement for us to do this work at
Holsworthy Barracks arises from a capability need of Defence. We have a
requirement to ensure that we continue to maintain capability generated out of
the Liverpool Military Area, and along with that comes the requirement to
ensure an adequate and stable power supply. The assurance of capability was the
driver behind the need for the works and it was also the driver behind
confirming the solution that we are bringing to the committee.
Defence provided a summary comparison of the options and costs of three
proposed options to meet the need for the project:
n The ‘recommended
option’, where supply is provided from the AVZSS [ANZAC Village Zone
substation] along an existing 33 kV feeder, a 33 kV connection is made into
Holsworthy Barracks and the existing electrical distribution is upgraded to
seven rings mains (two of which are to be funded separately by the proposed MUR
project) a majority of which will be underground, is estimated to result in a
total cost of $21.1 million.
n A ‘do nothing
option’, where the increased power supply to Holsworthy Barracks is met through
the provision of hired generators and there is no upgrade to the electrical
distribution system, is estimated to result in a total cost of $123.0 million.
n An ‘outsource option’
where all Defence owned electrical infrastructure within the LMA will be
privatised and all electrical power will be purchased at retail costs (as
opposed to wholesale costs vide the recommended option) is estimated to result
in a total cost of $58.5 million.
Defence provided some detail on the supply options:
Compounding the LMA electrical power supply issue, the
current 11 [kV] connection voltage within the LMA, although suitable for local
distribution of loads is a highly inefficient voltage by which to transmit
large electrical loads over the distances that exist within the LMA. As an
example, the voltage loss across the existing five kilometre 11 kV supply cable
is 4%, however with a 33 kV cable across the same distance there is only a 1%
loss. Purchasing electrical power at 33 kV also attracts lower tariffs for
Defence when compared to an 11 kV connection.
Defence clarified why it chose the 33 kV supply option:
Taking power at 11 [kV] was an option, but the additional
feeders that would be required to link Holsworthy barracks with ANZAC Village
Zone substation to take the 28 MVA that Defence requires was a significant cost
and capability driver pushing Defence towards the 33 [kV] solution.
Defence stated that a study was conducted into the cost-benefit into
increasing the existing electrical infrastructure or replacing it. The outcome
of this was that replacing the majority of the ring mains was the better
It was decided for ring mains 1 through 5 that was the most
cost-effective solution, and [for] part of ring main 6.
Ring main 7 will make reuse of those existing Army feeders
which will become redundant as part of this project. Ring main 7 will be
reconfigured from Army feeders 1 and 2. I should also point out that the
project is able to recover a significant quantity of materials for reuse. The
intention is that the aerial cables and poles be recovered for use by Defence.
Defence stated that outsourcing infrastructure ownership and maintenance
to Endeavour Energy or another power company would have security implications.
Each contractor, meter reader and electrical failure response worker who might
need to access the LMA would require a security clearance:
Each of those security clearances is a fair bit of work, but
it could be done. But the bottom line is that access to our sites is difficult
now, and it is becoming more so. Particularly on a site like Holsworthy, where
we have some special operations capability, there are a number of sensitive sites
there to which we would rather limit access.
The Committee sought information on any disadvantages to the recommended
option. Defence advised that there are some disadvantages:
n The main disadvantage
with the recommended supply option is that there is no redundancy in supply.
Endeavour Energy has advised that the supply risk on an above ground 33 kV
feeder as per existing is ‘1 fault in 8 years’. Although this is a low failure
rate, supply via one feeder does not provide a level of physical supply redundancy.
However, the proposed delivery of a new Holsworthy Zone Sub Station by 2018
will provide Defence the opportunity to secure an additional 33 kV feeder at an
estimated cost of $2.0 million (in 2012 terms). The addition of a second feeder
from an alternate Zone Sub Station close to Holsworthy Barracks will provide
Defence with a level of redundancy and will decrease the risk to supply from ‘1
fault in 8 years’ to less than ‘1 fault in 20 years’.
n The main disadvantage
with the recommended connection option is that there is a high initial capital
cost to establish the two intake switching stations at Holsworthy Barracks,
which will include transformers to convert the 33 kV supply to an 11 kV supply
for distribution within Holsworthy Barracks. However, by adopting a 33 kV
connection, Defence is increasing the efficiency of the supply through
decreasing the resistance of the feeder that will supply power to Holsworthy
n The main disadvantage
with the recommended distribution option is that not all of the proposed new
ring mains will be established underground, with parts of two of the seven ring
mains remaining either partially or completely above ground. Although this
represents a residual risk to the distribution of power to unit facilities
located on these ring mains, this risk has been largely mitigated through the
inclusion of the two intake switching stations, their interconnection and the
resultant ability for Defence to redirect power via multiple ring mains.
However, Defence stated that the recommended option is the most
cost-effective option for Defence:
This cost effectiveness combined with the associated benefits
of increased efficiency and an increased level of redundancy suggests that the
recommended option provides a ‘value for money’ proposition.
Cost of the works
The overall project cost is $19.6 million, excluding GST. The Committee
received two confidential supplementary submissions detailing the project costs
and held an in-camera hearing with Defence on these costs.
The Committee notes that the value for money assessment it received
following the in-camera hearing demonstrated that the chosen option not only
provided the best outcome in terms of Defence capability, but was estimated to
cost significantly less than other options considered.
The Committee is satisfied that the costings for the project provided to
it have been adequately assessed by the proponent agency.
Adequacy of information provided
Defence provided the requisite Submission 1 to the Committee when the
inquiry was referred. This submission provided some detail but was not
The Committee received a private briefing from Defence on
8 August 2012, immediately prior to the public and in camera
hearings. This briefing was clear and provided comprehensive detail on the need
for the project, the options considered and the scope of the works. This
briefing also provided graphs and diagrams for key project concepts.
Following the public and in camera hearings, the Committee requested
further information on the need and the options considered. Defence provided
additional supplementary submissions with this information.
While the need for the project may seem self-evident, it is a primary
consideration for the Committee and should be clearly and logically stated in
Submission 1. The scope of the works and the options considered should also be
explained in detail.
Although the Committee was satisfied with the information it eventually
received following the public and in camera hearings, this information should have
been provided well prior to the date of the hearings.
In future, the Committee expects Defence to clearly state the need for
the project in its initial submissions and during its opening statement at the
public hearing. The Committee also expects Defence to provide comprehensive
information on the scope of the works and the advantages and disadvantages of
the options considered, in its initial submission.
Furthermore, all information provided at the briefing on
8 August 2012, including graphs and diagrams, should have been
provided when the project was referred.
Without this information, the Committee is unable to make a
determination regarding value for money.
The Committee recognises that Defence projects may have security
considerations. However, the Committee reminds Defence that it can receive
The Committee expects Defence to rectify these issues in future
Notifying elected representatives
Defence contacted the Liverpool City Council and the state Member for
Menai to notify them of the project, offer a briefing and advise them of the
date of the public community forum.
Defence did not, however, contact the local federal member, the Member
It was our decision not to approach the federal member and I
believe the reasoning for that was that it was […] a local project that
happened entirely within the perimeter of Holsworthy Barracks.
The Committee suggested that Defence write to the Member for Hughes to
notify him of the project and offer a briefing.
Following the hearing, Defence reported that it had notified the local federal
member of the proposed project and offered ‘the opportunity to be provided with
a detailed project briefing.’
The Committee failed to understand why Defence contacted some elected
representatives but neglected to contact the federal member. As this is a
federal parliamentary committee providing parliamentary scrutiny and the
opportunity for public comment, it seems inconsistent for any agency to contact
the local council and state member but neglect to contact the federal member.
The Committee’s protocol is to notify federal members of parliament of
public works in their electorates, and invite them to make a submission to the
inquiry and attend the public hearing.
The Committee suggests that for future projects, Defence write to all
elected representatives with works in their electorates, to notify them of the
project and offer a briefing.
Final Committee comment
The Committee found significant deficiencies in Defence’s preparation of
the initial submissions and presentation of information at the public hearing.
In contrast, Defence’s private briefing on the day of the public hearing
and supplementary submissions provided a level of detail that was excellent and
should have been included in the initial submissions.
The Committee needs this information well prior to the hearing date to
allow it to adequately prepare for the public hearing and make a proper
assessment of the project.
The Committee strongly encourages Defence to provide this level of
detail in all initial submissions, particularly when discussing the need, scope
and options considered.
The Committee previously made a recommendation to Defence on the
importance of presenting information regarding options considered.
The Committee is disappointed that Defence did not provide this material in its
initial submissions for this project.
The Committee reminds Defence that the provision of information in a
clear, comprehensive and timely manner also allows the opportunity for public
comment. This is an integral part of the Committee’s inquiries into public
The Committee advises Defence to address the lapses in preparation apparent
in this inquiry and ensure that evidence in future projects is presented in a
clear, comprehensive and timely manner.
The Committee was satisfied with the evidence provided by Defence
regarding the proposed high voltage electrical distribution upgrade in the
Liverpool Military Area, NSW.
Having regard to its role and responsibilities contained in the Public
Works Committee Act 1969, the Committee is of the view that this project
signifies value for money for the Commonwealth and constitutes a project which
is fit for purpose, having regard to the established need.
||The Committee recommends that the House of Representatives
resolve, pursuant to Section 18(7) of the Public Works Committee Act 1969,
that it is expedient to carry out the following proposed work: Proposed high
voltage electrical distribution upgrade, Liverpool Military Area, NSW.