Irrigation Modernisation – The Lake Wyangan Project
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Transcript of Irrigation Modernisation – The Lake Wyangan Project
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Irrigation Modernisation – The Lake Wyangan Project
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The Murrumbidgee Irrigation Area (MIA)
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Infrastructure Modernisation Planning
Characterised infrastructure into zones
Cost of operating and maintaining infrastructure
Revenue generated by customer charges
Volume of average annual water losses
Ability to meet all necessary contract and legal obligations
Agronomic potential of soils
Environment value of surrounding area
Land use changes/land use zones
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Infrastructure Modernisation
Improve system efficiencies Meet changing customer
needs Reduce asset ownership costs Generate water savings Reduce infrastructure
footprint
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Infrastructure Modernisation Strategy
Replace lined channels with gravity pipes
Replace Dethridge Wheels with compliant flow meters
Automate flow control structures
Support on-farm water efficiency improvements
Application for Australian Government funding under the Water for the Future initiative
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Alliance Delivery Model
Used successfully on infrastructure projects Enables early commencement of the modernisation program Provides for constructor input during the design phases Strong likelihood of achieving outstanding performance Ensures high standards of work Provides opportunities for local
firms Maximises likelihood of
mitigating time/cost overruns Maximises the potential for
staff development
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Lake Wyangan System
Closed system within a catchment of 7,000 ha Supplying 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
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Lake Wyangan Modernisation
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
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Planning Options
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
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Lake Wyangan Modernisation
Reline and widen 15.8km of ageing concrete-lined channel– Replace 122,000 sqm of concrete lining
Replace open channels and ageing pipelines with 13.8km gravity pipelines
Replace Dethridge wheels with flow meters compliant with Australian Standard AS4747
Install channel automation of flow control structures
Install remote monitoring of meters
Scope
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Technical Risk Reduction
Earthwork remediation and compaction Concrete mix Shotcrete application Panel jointing materials Shotcrete finish
Shotcrete Lining Trials
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Construction program
Construction will commence in May 2013 All works to be completed by November 2014 Pipeline and channel works have been designed to minimise
supply disruptions. Customers notified in advance of periods when the supply
system will be unavailable Priority for construction is:
– Supply and installation of gravity pipe lines– Channel re-lining and earthworks– Meter replacements– Channel automation
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Construction Program
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Customer Engagement
Timing May 2013 –Nov 2014 Nov 2013/Nov 2014
Planning options
Survey and detailed design
Outlet designs
Stakeholder forums
Individual face-to-face meetings
Construction:
– Civil
– Mechanical
– Electrical
Acceptance testing
New system begins operation
Key steps
Oct 2011– ongoing Oct 2011 – May 2013
Planning and design
Construction Testing/ Commissioning
Building relationships
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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
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Acknowledgement
The Lake Wyangan Modernisation Project received funding of $50 million
from the Australian Government’s Water for the Future initiative through
the Private Irrigation Infrastructure Operators Program in NSW
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