Since its launch last year the Infrastructure Sustainability Council of Australia (ISCA) has trained more than 200 Infrastructure Sustainability (IS) accredited professionals, seen 10 projects register for an IS rating and has now formally awarded Australia’s first IS as built rating.

The honour went to City East Alliance team, who delivered the Great Eastern Highway Upgrade on behalf of Main Roads Western Australia.

The ISCA assessment highlighted best sustainable practice in the project management systems, materials and land management of the project.

The highway now boasts the largest use of recycled material on any WA State road with 43 per cent of imported material being recycled. Instead of using high-value potable water, the project installed groundwater bores and constructed a weir which, on completion, was handed to the local council for the irrigation of parks.

The project also reduced energy consumption and environmental impact by using warm mix asphalt, applying innovative foaming technology to mix the bitumen into the asphalt mix.

“This is a milestone for ISCA and demonstrates the importance and benefits of applying the IS rating scheme to our Nation’s assets.  I congratulate City East Alliance (CEA) for applying the IS rating scheme during the design and construction of this project,” said ISCA CEO Antony Sprigg.

“Their focus on sustainability, innovation and implementing best practice sustainability solutions no doubt enabled the project to achieve a ‘Commended’ level of rating.”

Other projects currently registered for an IS rating range in capital value from $6 million to $8 billion, representing heavy and light rail, roads, bulk water and waste water, and port development, across a number of states. The project contract types range from fixed cost construction, design and construction to private public partnerships and alliances.

“The level of interest and take up for the IS Scheme has been more significant and rapid than originally anticipated, reflecting the infrastructure industry’s need and demand for a consistent means to assess, communicate and be rewarded for sustainability achievement,” said Holding Redlich partner and director of ISCA, Scott Lambert.

The sustainability achievements from the first IS rating (design – excellent) on Tenix’s Whitsundays Sewage Treatment Plant Upgrade included savings in electricity, a 15 per cent reduction in water use, 4,329 tonnes less concrete used, and no asphalt at all in the construction.