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ADELAIDE DARWIN MELBOURNE PERTH WHYALLA

ADELAIDE DARWIN MELBOURNE PERTH WHYALLA. Metropolitan Local Government Group. Recycled Water Scheme For Metropolitan Adelaide Opportunities and Constraints Presented by Nathan Silby. www.wallbridgeandgilbert.com.au Page 1.

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ADELAIDE DARWIN MELBOURNE PERTH WHYALLA

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  1. ADELAIDE DARWIN MELBOURNE PERTH WHYALLA Metropolitan Local Government Group Recycled Water Scheme For Metropolitan Adelaide Opportunities and Constraints Presented by Nathan Silby www.wallbridgeandgilbert.com.au Page 1

  2. ADELAIDE DARWIN MELBOURNE PERTH WHYALLA Recycled Stormwater • Harvest Volumes • Current – 8 GL/annum • Committed – 13 GL/annum • Proposed – 10 GL/annum • USHOS 6.2, 11.6, 8.8 – 26.6 GL/a • “Water For Good” targeted capture and harvest of 35 GL/annum by 2025 www.wallbridgeandgilbert.com.au Page 2

  3. ADELAIDE DARWIN MELBOURNE PERTH WHYALLA Sewage • 85 GL/annum currently produced in the greater Adelaide area. • Approximately 25 GL/annum is reused. • Storage requirement 40 GL • (Hope Valley + Happy Valley 14 GL) www.wallbridgeandgilbert.com.au Page 3

  4. ADELAIDE DARWIN MELBOURNE PERTH WHYALLA Recycled Stormwater v’s Treated Effluent • Combined potential yield ≈ 140 GL/annum • 75% of Adelaide's current mains water supply, (≈ 180 GL/a) & 40% of the predicted 2050 supply (≈360 GL/a) . • Demand for non-potable water less than potential supply – prioritisation of treated wastewater v's stormwater required. (Council irrigation Demand 5 GL/a) www.wallbridgeandgilbert.com.au Page 4

  5. ADELAIDE DARWIN MELBOURNE PERTH WHYALLA Distribution Networks • A number of constructed, committed & proposed networks across metro Adelaide. • Connection between networks to provide reliability of supply across council boundaries. www.wallbridgeandgilbert.com.au Page 5

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  9. ADELAIDE DARWIN MELBOURNE PERTH WHYALLA Indicative Network Connection Costs www.wallbridgeandgilbert.com.au Page 9

  10. ADELAIDE DARWIN MELBOURNE PERTH WHYALLA Pricing • SA Water 75% Tier 2 – ($1.86) • (Current mains water price $2.48) • Bolivar <$0.15 sliding • Glenelg $0.23 to $0.44 • Salisbury / TTG / Playford • Usage $2.20 • Supply $50/annum • Bulk Transfer $1.60 www.wallbridgeandgilbert.com.au Page 10

  11. ADELAIDE DARWIN MELBOURNE PERTH WHYALLA Issues Moving Forward • Mixing recycled stormwater & treated effluent (ASR, benefits) • Prioritisation of source • Pricing (data, competition, restriction v price) • Detailed demand study to quantify likely demand for reuse water • Control of carp in treatment wetlands www.wallbridgeandgilbert.com.au Page 11

  12. ADELAIDE DARWIN MELBOURNE PERTH WHYALLA Issues Moving Forward • Assessment of the tertiary aquifers capacity to store expected volumes of stormwater. • Use of treated stormwater as a source of potable water. • Interconnection between council networks (operation, liability, benefits) • Funding www.wallbridgeandgilbert.com.au Page 12

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