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The Murrumbidgee Irrigation Area (MIA) Infrastructure Modernisation  Improve delivery system efficiencies  Meet changing customer needs  Reduce asset.

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Presentation on theme: "The Murrumbidgee Irrigation Area (MIA) Infrastructure Modernisation  Improve delivery system efficiencies  Meet changing customer needs  Reduce asset."— Presentation transcript:

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2 The Murrumbidgee Irrigation Area (MIA)

3 Infrastructure Modernisation  Improve delivery system efficiencies  Meet changing customer needs  Reduce asset ownership costs  Generate water savings  Reduce infrastructure footprint Key Objectives

4 Lake Wyangan System  Closed system within a catchment of 7,000 ha  Irrigation supplies to around 200 properties  Ageing concrete-lined gravity supply channels  Constrained system limited to 220 ML/day  Mix of hobby blocks, horticulture and large area  Social amenity provided by Lake Wyangan Background

5 Lake Wyangan Project Area

6 Lake Wyangan Project  Replace ageing infrastructure that is at risk of failure  Enable delivery of contracted levels of service  Minimise the impact on water levels and water quality and the overall environmental health of the Lake Wyangan catchment  Realise the estimated water savings target for the project Objectives

7 Lake Wyangan Project  Upgrade the existing supply system –Focus on renewal of ageing assets over water savings  Reconfigure the existing system –Focus on providing a secondary supply system for some areas to address capacity constraints  Build new assets to alleviate requirement to upgrade some capacity constraints –Focus on creating new asset over renewal of existing assets Options considered

8 Lake Wyangan Modernisation  Reline and widen 15.8km of ageing concrete-lined Lake View Branch Canal ( 122,000 sq. m of shotcrete lining)  Replace open channels and pipelines at the end of their working lives with 13.8km of GRP and PVC gravity pipelines  Replace Dethridge wheels with electromagnetic flow meters compliant with AS4747  Automation of regulators and escape structures  Install remote monitoring of flow meters Scope

9 Existing Channel Lining

10 Assessment of Existing Lining

11 Lining Design Criteria  Convey the required flow  Construction within winter shutdown periods  Reduce seepage losses  Prevent erosion / dispersion of soil behind lining  Durability for 80 years design life  Cost-effective solution Ranking  Fibre reinforced shotcrete  Grouted fabric mat  Shotcrete over sealed liner  Coletanche (geotextile) with asphalt / bitumen  Shotcrete over a flexible membrane  Hypalon  HDPE Design Criteria

12 Technical Risk Reduction  Earthwork remediation and compaction  Concrete mix and curing –Unreinforced v. polymer reinforced shotcrete  Shotcrete application –Shotcrete lining over a geotextile  Panel contraction and expansion joints  Lining detail at bank top  Shotcrete surface finish Shotcrete Lining Trials

13 Channel Re-lining

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15 Construction Schedule Timing May 2013 –Nov 2014Nov 2013/Nov 2014  Planning options  Survey and detailed design  Outlet designs  Stakeholder forums  Individual face-to- face meetings  Construction: –Civil –Mechanical –Electrical –Automation  Acceptance testing  New system begins operation Key steps Oct 2011– ongoing Oct 2011 – May 2013 Planning and design Construction Testing/ Commissioning Building relationships

16 Lake Wyangan Modernisation  Forecasting future customer behaviour and intentions  Managing customer expectations  Developing and adopting new design rules  Establishing new business processes  Anticipating changes to operating practices  Compressed construction window  Delivering a successful project for MI, customers and the region Challenges

17 Acknowledgement The Lake Wyangan Modernisation Project received Australian Government funding of $50 million through the Private Irrigation Infrastructure Operators Program in NSW

18 Thank You for Your Attention


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