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Project Manager : June July 2011
Project Manager 26 CASE STUDY HERE COMES THE RAIN AGAIN KEY PLAYERS IAN COLLINS AM Chief Executive Officer, Etihad Stadium PAUL BROWN General Manager Facilities & Assets, Etihad Stadium ANNE BARKER Managing Director, City West Water KEY CHALLENGE Rainwater harvesting was previously considered too complicated due to the design of the closed loop stormwater system. However, the stadium’s engineers recommended modifications which made it possible to divert water from the closed loop system. PROJECT CLIENT: Etihad Stadium SCOPE: Reduce water usage of the facility by installing rainwater tanks that collect water from the stadium roof. TIME FRAME: 12 months BACKGROUND BRIEFING In searching for a response to the water conservation challenge facing organisations, Etihad Stadium in Melbourne found inspiration in its enormous retractable roof. A project was undertaken to reduce the venue’s water usage. The aim of the rainwater roof harvesting initiative is to supply 25 per cent of the stadium’s water needs over the next 25 years. PROCESS Realising that rainwater harvesting was possible, Etihad Stadium undertook a feasibility study for diverting water from its own catchments. A full costing and engineering report was then submitted to Etihad Stadium’s water management partner, City West Water, with an application for co-funding of the project. With proposed annual water savings of 20 to 30 million litres , City West Water agreed to contribute 50 per cent of the cost of the project. “The water harvesting project was assisted by financial contributions from City West Water. The two parties have formed a strong working partnership to not only continue the existing water-saving initiatives but to investigate future projects,” said Paul Brown, General Manager Facilities & Assets, Etihad Stadium. In total 17 rainwater tanks were installed with a combined capacity to store up to one million litres of rainwater collected from the 40,000sqm stadium roof. Ten pneumatic water diversion valves and a further 10 motorised water transfer valves were used, along with insulation of 1.5km of pipe work. The rainwater captured is used for flushing toilets and irrigation of the venue’s playing surface. According to Anne Barker, Managing Director, City West Water, the project is a model environmental initiative. “We all have a responsibility to save our precious drinking water and this rainwater capture initiative demonstrates how commercial users can introduce relatively cost-effective measures to achieve exactly that.”
April May 2011
Project Manager Aug Sep 2011