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CIMIC Group Limited Annual Report 2016 |
Sustainability Report
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Of total water demand, 43% (5.4 million kilolitres) was met through recycling or reusing water. Of the water that was withdrawn, it was
sourced as follows:
Source of water withdrawals (%)
CPB Contractors
Leighton Asia
Thiess
Mains
43
97
2
Groundwater
29
3
97
Surface water
28
0
1
Marine water
0
0
0
The discharges of water went to the following areas:
Discharges of water (%)
CPB Contractors
Leighton Asia
Thiess
Surface water
1
100
100
Marine environment
0
0
0
Other discharges
99
0
0
CPB Contractors and UGL have been selected by Melbourne Water to deliver the approximately $127 million Western Treatment Plant -
Treatment Capacity Increase Project in a 50:50 joint venture. The new treatment facility at Werribee is designed to integrate with the
existing Western Treatment Plant and involves the design and construction of a new sewage treatment facility with a hydraulic capacity
of 140 million litres per day. The Group is proud to be able to apply its construction capability to upgrading a facility that processes
around half of Melbourne's sewage and produces almost 40 billion litres of recycled water a year.
USING MATERIALS EFFICIENTLY
We aim to continually innovate so as to improve the efficiency of the resources we use and reduce waste, thereby lowering our costs,
improving our value proposition and benefiting the environment. In 2016, CPB Contractors and Leighton Asia spent some $924 million on
4.84 million tonnes of materials.
Material use (million tonnes) and spend ($m)
CPB Contractors
Leighton Asia
Quantity
2.68
2.16
Spend
396
530
The quantities of construction materials purchased and the spend on those materials is split as follows:
Quantities (%)
CPB Contractors
Leighton Asia
Concrete
92
79
Steel
7
21
Asphalt
1
0
Spend (%)
CPB Contractors
Leighton Asia
Concrete
62
23
Steel
32
77
Asphalt
6
0
Of the Group’s total expenses in 2016: materials were 17%; sub-contractors were 36%; personnel costs were 24%; plant costs, including
depreciation and lease payments were 14%; and other expenses were 9%.
On the Sydney Metro Northwest, the CPBJHD joint venture project team, in collaboration with the tunnel boring machine (TBM)
manufacturer, developed an innovative traverse and relaunch methodology which, utilising the TBM propulsion system, avoids
installation and relocation of jacking systems, that had not been implemented anywhere in the world to date. This innovative process
reduced the construction program by 2.5 months, reduced construction noise by over 10 decibels and reduced materials inputs, avoiding
the use of over 600 tonnes of structural steel.
Use of materials on the Sydney Metro Northwest was significantly reduced, with a 45% reduction in ‘ecopoints’
55
below the reference
footprint, thanks largely to an innovative concrete mix for the high-strength concrete used in the tunnel lining segments. A reduction of
330,000 tonnes of concrete was achieved due to a reduction in segment thickness from 370mm to 260mm.
REDUCING WASTE
To minimise the impact of our operations on the environment we encourage our teams, wherever possible, to take a life-cycle approach
to resource efficiency. This means reducing waste through smarter design and procurement, and recycling when this is possible.
55
Ecopoints are a measure of overall environmental impact developed by BRE. The annual environmental impact caused by a typical UK citizen creates 100
Ecopoints; more Ecopoints indicates a higher environmental impact.
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