Sustainability Matters Oct/Nov 2016

Page 22


Collaboration IS key Antony Sprigg*

The IS rating scheme articulates the themes, categories, credits and benchmarks that the infrastructure industry has embraced as the vernacular of sustainability over the last four years. The IS rating scheme is now used widely in sustainability assurance processes across Australia. Presently the scheme boasts 54 projects/assets valued at over $79 billion (capital value).


he Infrastructure Sustain-

cycle environmental impact and kept

saved 305 MWh of electricity over

ability Council of Australia

the footprint entirely within the original

operational life, reduced water use by

(ISCA) facilitated the devel-


15%, reduced their materials footprint by

opment of a sustainability

• The Great Eastern Highway Upgrade used

25% and, in a world first, trial of parallel

community of practice in the

warm mix asphalt in WA for the first time

nitrification and denitrification technology.

infrastructure industry when it developed

reducing energy use and greenhouse

• Wynyard Walk achieved a number of

and launched the Infrastructure Sustain-

gas emissions as well as achieving 43%

initiatives, including minimising waste,

ability (IS) rating scheme in 2012.

recycling rate for imported materials.

reducing community impacts during construction and optimising energy ef-

Projects and assets that have been

• The Sydney Metro Northwest Early

awarded IS ratings have achieved amaz-

Works project discovered and preserved

ing outcomes:

a colonial era heritage site by modifying

• The Enlarged Cotter Dam project replaced

the skyrail section of the project.

ficiencies. • The Yarra Park Recycled Water Treatment Facility gained water efficiencies of 7%

100% of potable water with non-potable

• The Sydney Metro Northwest Surface and

during summer and 8% during winter

water and reduced embodied carbon

Viaduct Civils project modelled a 44%

operations and has been able to supply

emissions by 23%.

emissions reduction, had a potential 9%

99.99% of potable water replacement

• The Gateway WA design reduce the life

water saving over the life of the project

demand (directly offsetting 291,818,800

cycle environmental impact of materials

and demonstrated Australia-based market

litres of potable water to date).

by 58% and introduced the use of LED

transformation through development of

The IS rating scheme has also been of

lighting on highway roads.

sustainability data collection and report-

interest outside Australia. There are now

ing software.

five ISCA New Zealand Founding Members

• Gold Coast Light Rail saved $15 million through the implementation of sustain-

• The Sydney Metro Northwest Tunnel and

(Auckland Airport, AECOM, BECA, Panuku

ability initiatives, reduced embodied

Station Civil Works reduced emissions

Auckland and Tonkin + Taylor) showing

carbon emissions by 55%, had an 89.7%

by 24%, reduced water use by 37% and

significant leadership and commitment to

recycling rate for inert and non-hazardous

had a 45% reduction in environmental

the New Zealand infrastructure industry.

wastes and more than 96% of project

impact of materials, achieving the highest

New Zealand is also home to two IS ratings.

employees were local.

IS score to date of 83.

Auckland Airport has used IS to benchmark

• The Googong Water Treatment Plant

• The Whitsundays STP Upgrades saved

its operations and Madden and Packenham

Chemical Facility Upgrade achieved a

more than $1 million through the imple-

reduced construction carbon emissions

significant reduction in materials life

mentation of sustainability initiatives,

by 27% and its materials environmental

22 Sustainability Matters - Oct/Nov 2016