Page 5374 - Week 12 - Thursday, 28 October 2010
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(2) A list of 18 options was considered and inter-agency workshops were undertaken during the preparation of the strategy.
Seven short-listed options were investigated in more detail as listed below;
• Option 1: dual reticulation from Lower Molonglo Water Quality Control Centre (LMWQCC) for irrigation of public open space;
• Option 2: dual reticulation from LMWQCC for irrigation of public open space, residential garden watering and toilet flushing;
• Option 3: sewer mining from Molonglo Valley Interceptor Sewer (MVIS) for irrigation of public open space;
• Option 4: sewer mining from MVIS for irrigation of public open space, residential garden watering and toilet flushing;
• Option 7: environmental flow substitution;
• Option 10: stormwater harvesting from the on-line pond for irrigation of public open space; and
• Modified option 14: installation of on-block rainwater tanks for garden watering, toilet flushing and laundry use.
The conclusion from the study was broadly that the provision of non-potable water supplies to individual households in Molonglo Valley would be very expensive (in excess of $300 million and possibly significantly more) and that the best option for Molonglo Valley at this stage would be to implement water sensitive urban design (WSUD) principles and practices widely throughout the area and to implement a conventional water supply and wastewater management system for the area - taking advantage of the existing trunk infrastructure in the area.
As the Government has briefed the Greens, subsequent to the report, ACTPLA and DECCEW are implementing the Canberra Integrated Urban Waterways program including new ponds in Molonglo Valley for stormwater harvesting for irrigation of nearby sports fields.
(3) The scenarios modelled in the investigations are provided in the report.
Key modelling parameters included a future population of 75,000 and achievement of a minimum 40% potable water saving.
(4) The 2007 Kellogg Brown and Root report includes the cost benefit and sustainability assessment. A copy of this report can be provided to the Member.
Water—Stromlo water treatment plant
(Question No 1196)
Mrs Dunne asked the Treasurer, upon notice, on 23 September 2010:
(1) Who was awarded the construction contracts for the Stromlo water treatment plant and what procurement processes were followed.
(2) On what date was the completed Stromlo water treatment plant commissioned into service.
(3) What is/was the warranty period for the project.
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