hells gates dam & big rocks weir business case update · 2020. 9. 18. · big rocks weir public...
TRANSCRIPT
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Hells Gates Dam &Big Rocks Weir
Business Case Update
Townsville Enterprise Limited
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BIG ROCKS WEIR BUSINESS CASE
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• The proposed Big Rocks Weir is located approximately 26 km north-west of Charters Towers, capable of storing up to 10,000 ML of water.
• The proposed purpose of the weir is for water supply for irrigation, industrial development and urban water supply.
• Project includes mass concrete gravity weir and associated infrastructure including saddle dam, outlet works, fishway and access track.
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Reference Design
Big Rocks Weir – digital visualisation from upstream of the weir looking south
• Reference Design
• Approvals Processes
• Environmental Assessment
• Capital cost estimate -$59.82m (P90 – 38% contingency)
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Site overview
Site location
Big Rocks Weir, Charters Towers
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• 20,000 ML of unallocated water currently available under the Water Plan (10,000ML strategic reserve and 10,000ML general reserve)
• Yield modelling undertaken indicates BRW could provide 10,000 ML at 100% reliability
• More than 10,000ML could be made available, but would be expected to be deliver less reliability
• Final amount of water to be made available subject to DNRME consideration
Big Rocks Weir Public Meeting, Charters Towers
Water availability and agricultural production
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Big Rocks Weir Public Meeting, Charters Towers
Economics
BCR - 7%
10,000ML of water 1.38
15,000ML of water 1.80
20,000ML of water 2.14
Benefits
• Approximately 172 full-time equivalent (FTE) positions
directly supported during the construction peak in 2022.
• Additional economic activity and employment
opportunities associated with the operations of BRW and
use of the additional water supplied by the weir.
• At full production, an additional $35 million per annum in
additional agricultural revenue, and 117 FTEs each year will
be directly supported by the additional agricultural
production associated with BRW (10,000 ML of water).
• Reliability of water supply for Charters Towers during
extended dry periods.
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Business Case21 August 2020
IAR31 January 2021
Construction2021/22
Milestones
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NEXT STEPS:
➢$30m funding committed by Commonwealth Government
➢Seeking matching funding contribution from Queensland Government
➢Progress detailed design
➢Charters Towers Regional Council as proponent to construct, own and deliver Big Rocks Weir.
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HELLS GATES DAMPROJECT UPDATE
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Hells Gates Dam project overview
➢ 2,100 Gigalitre (GL) Hells Gates Dam
➢ 50,000 ha irrigation area
➢ 25,000 ha approx. of inundated area
➢ Dam height at 75 m
➢ 3 x weir pools
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Location120 Kilometres north of Charters Towers and north west of Townsville.
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Project update
HELLS GATES DAM:
➢Important project for the region
➢Delivery in accordance with Building Queensland guidelines
➢Coordinated project with Office of Coordinated General
➢Environmental Impact Assessment January 2022
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Milestones
Business CaseApril 2022
Environmental Impact AssessmentJanuary 2022
Construction20??
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DAM, WEIR’S and IRRIGATION
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Power link will investigate connecting 850MW of pumped hydro generation into the Ross Substation at Townsville.
Pumped Hydrology Storage
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Pumped Hydrology Storage
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Thank you!