Sydney Metro’s twin 15 kilometre railway tunnels between Bella Vista and Epping have been awarded a top sustainability rating, making the project an industry leader.
Australia’s longest railway tunnels, delivered earlier this year by tunnel builders CPB John Holland Dragados (CPBJHD), have been awarded the highest possible rating for sustainability by the Infrastructure Sustainability Council of Australia (ISCA).
The rating is based on Sydney Metro’s extensive range of sustainable initiatives. These include reusing 100 per cent of the 4.3 million tonnes of crushed rock and excavated material generated from tunnelling and reducing water use by 66 per cent.
Other key successes of the project included reducing emissions through methods such as using B5 blended fuel, hybrid excavators and reduced electricity consumption
ISCAs has awarded the project an As-Built rating of 92 and a Design rating of 83 – the first Design rating to ever score greater than 80 on an infrastructure project. This rating classes Sydney Metro as an ISCA ‘leading’ project.
ISCA ratings evaluate infrastructure projects by looking at planning, design, construction and operations.