Yarra Valley Water Business Breakfast 24 November 2010

Coburg Principal Activity Centre Stormwater Harvesting and Reuse Project

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Background - Population

Victorian Government’s Melbourne 2030 Strategy:• 5 M population for Melbourne by 2030• 26 Principle Activity Centres (PAC) identified• Coburg identified as a PAC

Large amount of infill development expected:• 4,000 plus new residential dwellings• 65,000 m2 of commercial/retail floor space• 1400 new permanent jobs plus 10,000 temporary jobs during

construction• $900M worth of investment in local economy

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Background – Stormwater

Increased urbanisation resulting in more stormwater runoff Further environmental degradation to waterways• Nutrient loading• Increased sedimentation

Run off capable (in many cases) to supply incremental increase in demand

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Background (Continued)

New paradigm created:• Harnessing alternative water supplies• Sustainable principles• Long term environmental benefits

Council now pushing developers to apply ESD principles:• Focus on reducing potable consumption

Outcome - Stormwater harvesting

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YVW Coburg Proposal

Harvest stormwater from two existing drains (MW and Council) which run along the boundary of the proposed site

Treat the stormwater to a very high recycled water standard

Reticulate the recycled water to:• All new houses/apartments within a designated

area for toilet flushing, laundry and outdoor uses• Nearby public open spaces for irrigation

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Project Benefits

213 ML/year of potable water substituted

Much better stormwater quality than is currently the case:• Stormwater is currently untreated• Nitrogen – 22 % reduction• Phosphorous – 42 % reduction• Reduced sediment loading

Reduced urban run off to Merri Creek – 21 %

Recycled water available for open space irrigation

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Harvesting Stormwater

UndergroundLow Level

Tank(7ML)

Diversion 2

Diversion 1

Urquhart Street Drain(675mm)

Harding Street Drain(2.4m x 1.2m)

RelocatedTennisCourts

RWTP

UndergroundHigh Level

Tank(7ML)

Third Pipe

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Areas To Be Supplied With Recycled Water

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Underground tanks will use pre cast concrete culvert type sections

Proposed Underground Storage Tank Solution

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A packaged ultra-filtration treatment plant system will be used to produce Class A recycled water

Recycled Water Treatment Plant

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Moving Forward

Federal Govt. grant of $6.6M approved for Project

Detailed planning with Moreland Council in progress

Design work for underground tanks/pumps etc underway Construction to start Aug 2011

Pro Active Community & Stakeholder Consultation planned to start January 2011