News

SNOWY 2.0 PROJECT UPDATE – MARCH 2024 

03/04/2024

This month we’ll update you on tunnel boring machine (TBM) Kirsten, which is putting Snowy 2.0 at the forefront of TBM tunnelling innovation, along with the unique concrete segments she will install as part of the inclined pressure shaft excavation and lining.

Damon Miller, Senior Engineering & Quality Manager for Snowy 2.0, works with the design, manufacturing and construction teams to plan and deliver the engineering solutions behind Snowy 2.0, the pumped hydro expansion of the Snowy Scheme.

Building the inclined pressure shaft (IPS) will be a unique and technically challenging engineering feat for the project team

After finishing the 2.9 kilometre Emergency Cable and Ventilation Tunnel, TBM Kirsten has been substantially modified for her next critical role excavating the IPS.

This very steep, 1.6 kilometre, 10 metre diameter shaft forms part of the waterway and will connect the headrace tunnel with the underground power station. 

Project director Dave Evans believes the specially manufactured segments being used for this shaft are going to change the world of hydropower. “It means we can do less steel lining, we can move power stations closer to the surface which is what we’ve done here and construct an inclined pressure shaft with a tunnel boring machine which all makes it safer, quicker and the quality a lot better.”

To see the latest Snowy 2.0 project statistics, view the fact sheet here.

To cope with the extreme and fluctuating water pressures in the IPS, the concrete segment rings lining the tunnel require bespoke connectors.

The Force Activated Coupling System or FACS are specially-developed steel couplers with pin and socket elements.

When the segment rings are interlocked, the pre-stressed FACS keep the joint closed when the tunnel experiences sharp changes in pressure from turbine operations and shut downs. It’s like water hammer when opening or closing a tap at home, just on a much larger scale.

This new technology has been developed by Future Generation joint venture partner Webuild and their designer Lombardi, with the FACS segments being manufactured at our precast factory in Cooma.

A large-scale test is being conducted by installing eight FACS rings to link the emergency, cable and ventilation tunnel with the IPS.

Meanwhile, innovative design by the leading TBM manufacturer Herrenknecht has allowed TBM Kirsten to be modified to safely tunnel uphill.

The machine’s working platforms, equipment and operator’s cabins all pivot to remain horizontal and the walkways become steps and ladderways. 

A screw conveyor will move excavated rock from the cutterhead. This feeds into a sandwich conveyor that has face-to-face rubber belts to hold the material so it can be transported down the steep slope without spillage.

The IPS is on a 47% incline so a monorail is being installed to transport workers and there is a rack and pinion system for multi-service vehicle access including segment delivery up the steep slope to the TBM.

News

SNOWY 2.0 PROJECT UPDATE – SEPTEMBER 2023

05/10/2023

Following the recent announcement of the Snowy 2.0 project reset, the Snowy Hydro and Future Generation contractor teams are now a single team, working in close collaboration to achieve full commercial operation by December 2028.

The Snowy 2.0 Project Team is focused on excellent environmental outcomes while maintaining all-important safety principles. Safety is the number one priority for Snowy Hydro and core to the company’s values. High expectations for the management of all safety risks extend across the Snowy 2.0 project, without compromise.

Snowy 2.0 is critical to Australia’s transition to a low-carbon economy and when complete it will have broad-scale environmental benefits. Consistent with its responsible operation of the Snowy Scheme in Kosciuszko National Park for almost 70 years, Snowy Hydro is equally committed to minimising potential impacts from Snowy 2.0.

SAFETY PERFORMANCE
– As at September 2023, the project’s 12-month rolling TRIFR (Total Reportable Injury Frequency Rate) is 2.97, below the target of 4.0.**
– There has been a reduction in recordable and serious incidents on the project, with a focus on planning and a coordinated approach to safety management.
– Snowy 2.0 works closely with Comcare and SafeWork NSW and will continue to incorporate lessons learned and findings from the regulator into operational practices. 
**Calculated per million hours worked. Total hours worked to end September 2023: >17.7 million.

Construction of Snowy 2.0 will temporarily impact less than 0.1% of the park with any short-term unavoidable impacts rehabilitated throughout the project, in accordance with environmental project approvals. This includes around $100 million provided by Snowy Hydro to the offsets program for Kosciuszko National Park. Once operational, Snowy 2.0’s footprint within the park will be only 0.01%.

ENVIRONMENTAL PERFORMANCE
– 4 independent audits of the Snowy 2.0 project undertaken since project commencement. 
– 1,500 hours spent annually to proactively monitor the 163 biodiversity sites.
– More than 200 kilograms of native seed collected over three years for rehabilitation activities.
– 27 heritage site excavations and more than 35,00 indigenous artefacts salvaged and currently being documented, adding to the history of the Snowy Mountains Indigenous people. 

In this month’s update from the main worksite at Lobs Hole, Project Integration Manager Paul Smith recaps progress to date with over 40 per cent of Snowy 2.0 now complete, including:

  • Excavation of the 2.85 kilometre main access tunnel, lined with almost 13,000 locally manufactured concrete segments.
  • Excavation of the 2.9 kilometre emergency, cable and ventilation tunnel. 
  • Major upgrade of Ravine Road, the steep and winding 15 kilometre access road into Lobs Hole.
  • Infrastructure to support construction including the main yard workshops, worker campsites and more than 50 kilometres of access roads across three main worksites at Lobs Hole, Marica and Tantangara.

Excavation is underway of the huge 250 metre-long underground power station cavern and the tailrace tunnel, and TBM Kirsten is being modified to excavate the world-leading inclined pressure shaft. Drill and blast to create 11 cross passages and construction tunnels continues.

Above ground, there is plenty of activity across all sites. Lobs Hole Surface Works Project Manager Steve Lee helps ensure the Snowy 2.0 project is delivered in a safe and timely way, and to the quality standards and requirements of Snowy Hydro.

Surface works refers to a broad mix of activity such as haulage of spoil, maintenance of site roads, environmental controls, main yard area activity, office facilities and directional drilling, as well as the Talbingo intake build.

Latest progress on site includes Stage 2 earthworks with a recent blast covering an area of 4,500 square metres. About 10,000 cubic metres of material is being removed as the excavation of the 104-metre-high intake continues.

Snowy 2.0 is the largest renewable energy project under construction in Australia and will provide crucial deep storage central to Australia’s renewable transition. When complete, Snowy 2.0 will deliver 2,200 megawatts of dispatchable generation.

News

SNOWY 2.0 PROJECT UPDATE – JUNE 2023

26/06/2023

In the June update of the pumped-hydro expansion of the mighty Snowy Scheme, Snowy 2.0’s Alex Woschitzka explains construction progress at the massive Talbingo and Tantangara intakes. The project’s Quality Coordinator also checks in on the transformation of a narrow fire trail through steep terrain into a road suitable for heavy vehicles.

Significant progress has been made at the Talbingo intake, where water will exit the tailrace tunnel when Snowy 2.0 generates power. This is also where water enters the tunnel for pumping.

Construction teams have moved more than 310,000 cubic metres of earth to date, about half the total amount that will need to be moved. More than 24,000 metres of rock bolts have been installed and 8,300 square metres of shotcrete sprayed to support the wall.

As part of quality assurance, the shotcrete must be tested for compressive strength. Samples are taken from the truck and also cored from the face to ensure it meets the intended strength requirements. For the rock bolts, pull-testing is conducted to ensure they have been correctly installed, and meet the design and quality requirements. 

When completed, the total height of the Talbino intake excavation will be 104 metres, with about 31 metres of that below the water level. The concrete intake structure will be an impressive 50 metres in height.

Construction is well underway on an internal access road through mountainous terrain. With the help of Snowy 2.0 subcontractor Leed, a narrow fire trail will be widened into a six-kilometre road to enable heavy vehicles to access a rock emplacement area on Talbingo Reservoir.

Works began from both ends across very challenging terrain, achieving a major milestone recently when the two pioneering fronts joined across the Middle Creek cliffs. A temporary bridge with a 36-metre span has been installed across Middle Creek and is capable of supporting a fully-loaded 80-tonne dump truck.

In another milestone achieved in June, stage one earthworks have now been completed at the Tantangara intake. The first stage involved excavation of about 205,000 cubic metres of earth with a further 78,000 cubic metres of drilling and blasting earthworks expected in the next stage.

To support the excavation, more than 18,000 metres of rock bolts have been drilled and installed, and approximately 6,100 square metres of shotcrete sprayed. The excavation is currently about 26 metres deep and will be extended to a total depth of 55 metres.

Tantangara intake is where water will enter the headrace tunnel when the Snowy 2.0 power station is in generation mode. When in pumping mode, water will exit through the intake and fill Tantangara Reservoir. 

News

SNOWY 2.0 PROJECT UPDATE – MAY 2023

30/05/2023

May was a milestone month for the Snowy 2.0 team with the completion of the emergency, cable and ventilation tunnel, or ECVT – another vital step in the construction of Snowy Hydro’s new pumped-hydro expansion megaproject.

Snowy 2.0 senior project manager Rodd  Brinkmann explains the next stage of the project from his base at Lobs Hole, as preparation for excavation for the underground power station cavern gets underway.

The ECVT is a 2.93 kilometre tunnel that runs adjacent to the main access tunnel and provides alternate access to the site of the underground power station. Tunnel boring machine (TBM) Kirsten recently completed excavation of the ECVT and will soon start tunnelling the inclined pressure shaft. This very steep shaft links to the headrace tunnel from Tantangara Reservoir. 

TBM Kirsten will need to undergo modifications to excavate the 25-degree incline, including installation of a screw conveyor to extract excavated rock from the cutterhead to a sandwich conveyor system. With such a steep incline, construction of the 1.45km shaft with its concrete segment-lined tunnel, will be a world first. 

In the main access tunnel, or MAT, construction of cross passages and construction access tunnels is well underway with 850 metres of drill and blast tunnel excavation completed. Of the five cross passages linking the MAT and the ECVT, two are fully excavated and waiting on breakthrough into the ECVT.  Key construction tunnels are also being excavated to provide access to the machine hall, transformer hall and the top of the tailrace surge shaft. 

Workers have reached the main cavern areas from both ends and will soon commence excavation and support of the cavern crowns or ceilings of the power station halls. The excavation sequence of the cavern crowns is critical, as the in situ rock mass will relax and move inwards as the excavated void increases. These movements will be closely monitored during the process. Geotechnical drilling and plate load tests will measure and confirm the characteristics of the rock geology around the power station.

Dynamic 3D models of the power station caverns are also being used. 3D models are created using digital engineering to transform 2D design drawings and are displayed in the state-of-the-art immersive theatre at Snowy Hydro’s Discovery Centre in Cooma, where Snowy 2.0 engineers can collaborate with power station design experts from around the world. Once construction is complete, the detailed 3D models will be a valuable tool for asset maintenance. 

With so much activity in the tunnels, the current Snowy 2.0 underground workforce will increase by another 200 people in the coming months.  

News

Keeping the lights on for generations to come

26/02/2019

At Snowy, we have a proud history and a strong vision. Snowy Hydro, supercharged by Snowy 2.0, will underpin Australia’s renewable energy future and keep the lights on for generations to come.

Almost 70 years after the first sod was turned on the mighty Snowy Scheme, we will do it all again. Today, after consideration of our Board’s Final Investment Decision, we welcome Shareholder approval of Snowy 2.0.

“It’s an exciting time for our Company,” Snowy Hydro CEO Paul Broad said. “Snowy 2.0, like the original Snowy Scheme, is a nation building project that is vital to Australia’s economy and our energy transition.

“This significant expansion of the Snowy Scheme will provide the storage and on-demand generation needed to balance the growth of wind and solar power and the retirement of Australia’s ageing fleet of thermal power stations. In short, it will keep our energy system secure.

“Snowy 2.0 is not only a sound business investment for Snowy Hydro with over 8% return on investment. It also represents the most cost-effective way to ensure a reliable, clean power system for the future.

“When it is completed, Snowy 2.0 will be able to deliver 2000MW of on-demand generation, up to 175 hours of storage, and deliver more competition that will keep downward pressure on prices.

“We are committed to continuing to grow our portfolio of assets, to maximise competition in the National Electricity Market (NEM) and deliver more value to consumers,” Mr Broad said.

Last year Snowy Hydro contracted 888 megawatts (MW) of wind and solar projects which gave us incredible insights into energy pricing. This process confirmed many of the assumptions of Snowy 2.0’s business case, including that the National Electricity Market (NEM) has passed a tipping point. New renewables are now the most economic form of new generation, even when firmed by hydro or gas.

Snowy Hydro existing fast-start assets, and increased capacity with Snowy 2.0, will firm up large amounts of intermittent renewables by coming in and out of the system to ‘fill the gaps’ by generating energy at times of peak demand.

Snowy Hydro has a strong track record when it comes to pumped-hydro. For decades we’ve been successfully operating our pumping capability at Tumut 3 and that has been invaluable, especially in years of drought.

Snowy Hydro is the fourth-largest energy player in the NEM, providing much-needed competition in the market. Snowy 2.0, along with other developments, is adding to a portfolio that operates efficiently and reliably in a highly unpredictable NEM to maximise competition and drive the best outcomes for consumers.

Snowy 2.0 Exploratory Works will start immediately. The project is expected to generate up to 5000 jobs over the life of the project.

News

Snowy Hydro appoints preferred tenderers for Snowy 2.0

18/01/2019

Snowy Hydro has appointed Australian and global experts in construction, engineering and hydropower as preferred tenderers for the Snowy 2.0 project, following extensive competitive tender processes over the last 18 months.

The preferred tenderer for the civil works is Future Generation, a partnership between Australian construction and engineering company, Clough, and global hydropower and tunnelling specialists, Salini Impregilo.

World leader in hydropower engineering and equipment supply, Voith Hydro is the preferred electrical and mechanical tenderer and will deliver the latest hydro-generation technology in the new power station.

Australian company Leed Engineering has also been awarded the contract for exploratory works pre-construction activities.

Contracts are currently being finalised, with contract execution subject to Shareholder approval of the project.

This is another important step towards the commencement of the project. Snowy 2.0 is a world-leading pumped-hydro project that, with the existing Snowy Scheme, will underpin the stability of the energy market as more renewable energy enters the system.

News

Snowy 2.0 approved by the Board

12/12/2018

Today, the independent Board of Snowy Hydro Limited approved a final investment decision to proceed with Snowy 2.0, subject to Shareholder approval.

Snowy 2.0 is a pumped-hydro expansion of the existing Snowy Scheme, providing 2000 megawatts (MW) of on-demand generation and 350,000MW hours of large-scale energy storage.

After almost two years of rigorous due diligence on every aspect of the Project, including detailed financial analysis and ongoing geotechnical drilling, the Board is confident Snowy 2.0 is a strong investment for the Company.

The Board has informed the Shareholder of its decision to proceed with Snowy 2.0 subject to Shareholder approval. Further Project information will be released following Shareholder approval.

Find out more about Snowy 2.0 here.

News

Snowy 2.0 Declared Critical State Significant Infrastructure

09/03/2018

Snowy Hydro welcomes the New South Wales Government’s decision to declare Snowy 2.0 as a Critical State Significant Infrastructure (CSSI) project.

The declaration signifies the critical role that the Snowy 2.0 project, together with the upgrades to the NSW transmission network, will play in providing reliable energy and large-scale storage to NSW as we transition to a low emissions economy.

Snowy 2.0’s generation and large-scale storage capabilities, along with the existing Snowy Scheme, will continue to underpin the stability and reliability of the NEM as more intermittent renewables enter the market.

The CSSI declaration is not final approval for the project.  It is a framework that sets out the robust environmental assessment and approval process that is required for the Snowy 2.0 project.

Paul Broad, CEO of Snowy Hydro said that the CSSI declaration gives the company a very clear and transparent process to follow.

“Like any other project, we are preparing comprehensive Environmental Impact Statements which will include a range of scientific and technical studies to be carefully scrutinised by the NSW Government.

“We have the greatest respect for the Kosciuszko National Park. It’s  our backyard and for almost 70 years we have been excellent responsible environment managers operating the existing Scheme across the region.

“The project’s design is being done in a way that minimises its environmental footprint.  This includes putting the majority of the physical structures, such as tunnels and the powerstation deep underground”, Mr Broad said.

The EIS will detail the components of the project, the potential environmental, social and economic impacts of Snowy 2.0 and how to best manage them.  As part of the EIS, we will undertake thorough community consultation so that the wider community can have input into the process. The EIS will also be published for public comment.

Under the CSSI process and in accordance with the NSW Environmental Planning and Assessment Act 1979, Snowy Hydro will submit an EIS for assessment by the Department of Planning and Environment, in consultation with other key agencies such as the National Parks and Wildlife Service and the Environment Protection Agency.  

News

Snowy 2.0 Feasibility Study Delivered

20/12/2017

Snowy Hydro’s independent Board of Directors has approved the Snowy 2.0 feasibility study, and for further work to be undertaken for the project to progress to a final investment decision in 2018.

The feasibility study released today confirms that the Snowy 2.0 pumped hydro expansion project is both technically and financially feasible.  The comprehensive study provides a base case design and a strong investment case that exceeds Snowy Hydro’s stringent investment hurdles, with significant input from leading experts in economics, engineering and geology.

Snowy Hydro’s CEO, Paul Broad, said that progressing Snowy 2.0 was a strategic business decision and the projected return on investment would enable the company to fund the project.

“Snowy Hydro already plays a critical role in keeping the lights on but Snowy 2.0 would supercharge our existing capabilities by adding an additional 2,000 megawatts of dispatchable generation and 350,000 megawatt hours of large-scale storage.

“Snowy 2.0 will underpin the security and reliability of the National Electricity Market (NEM) as we transition to a low emissions future, at least cost to consumers.

“As coal-fired generation retires and renewables continue to grow, Snowy 2.0’s scale and central location will provide secure and reliable energy generation and the necessary large-scale storage to prevent blackouts and lower future energy prices.

“Snowy 2.0 is a strategic long-term investment in the NEM that will firm up future wind and solar generation.  Intermittent renewables underpinned by Snowy 2.0 is a combination that could replace baseload generation when coal-fired power stations retire,” Mr Broad said.

The feasibility study outlines:

  • A strong investment case for the project and funding strategies.
  • A base case technical design, to be further refined as the project moves to final investment decision.
  • The independent estimation of costs between $3.8 – $4.5 billion, which takes into account the need for extensive reinforcement of the project’s structures due to the challenging geological conditions that were uncovered during the geotechnical drilling program.
  • If Snowy 2.0 is not built, the NEM would need a combination of batteries and gas peaking stations to meet future energy needs.  This would cost at least twice as much as Snowy 2.0.
  • A project schedule that will see the first power generated from Snowy 2.0 in late 2024, in time to meet market needs.

“Completing this study is a significant and exciting milestone for us but it’s only just the beginning. The sheer size of Snowy 2.0 makes it a complex and significant project that will put the Snowy Mountains back in the global spotlight,” Mr Broad said.

Between now and final investment decision, Snowy Hydro will undertake further work including additional geotechnical drilling, issuing project tenders, finalising funding for the project and working through well established and rigorous environmental and planning approval processes.

The project will also boost economic activity across the Snowy Mountains from employment opportunities across the supply chain and in supporting services.

Snowy Hydro would like to acknowledge the work of our lead study engineer SMEC Australia and the Australian Renewable Energy Agency for their contributions to the study.

The feasibility study and more information on the project can be found on our website here.

To watch a video on the project click here.

News

Visitors in Cooma ahead of drilling for Snowy 2.0 commencing

28/06/2017

The Prime Minister, Malcolm Turnbull, Deputy Premier John Barilaro and Parliamentary Secretary Bronnie Taylor visited Cooma today ahead of investigative drilling commencing for Snowy 2.0.

Snowy Hydro Limited CEO Paul Broad and Snowy Mountains Engineering Corporation (SMEC) CEO Andy Goodwin provided a Snowy 2.0 update and showcased one of the drill rigs.

Mr Broad said the investigative drilling, which is expected to commence next month after all approvals, is a critical milestone for the Snowy 2.0 feasibility study.

“The drilling will provide us with detailed geotechnical information about the rock formations, strength and structure of the area where the tunnels between the Tantangara and Talbingo reservoirs and underground power station will be located.”

“The core holes will be drilled in key locations so that we have a very clear picture of the geology and can better plan and cost the project.” Mr Broad said.

The geotechnical information collected through this process will be shared with research and education institutions for science and research purposes.

The Prime Minister, Deputy Premier and Parliamentary Secretary’s visit was also an opportunity for Snowy Hydro and SMEC to bring together their local project teams to celebrate the reopening of the SMEC office in Cooma.

SMEC’s CEO Andy Goodwin said the reopening of their Cooma office and work on the Snowy 2.0 feasibility study will continue to generate economic activity in the region.

“It’s great to be working on such a iconic hydropower project with Snowy Hydro that reflects on our namesake and history. For SMEC this is an opportunity to bring back our local people with global experience to contribute to the legacy for the next generation.

“The Feasibility Study will generate more than 250 jobs across professional services, construction and administrative support and if Snowy 2.0 goes ahead we expect to create about 5000 jobs over the life of the build,” Mr Goodwin said.

The Snowy 2.0 Feasibility Study will be completed by the end of this year.

Snowy Hydro is proud to provide secure, stable and reliable renewable energy to households and businesses. If built, Snowy 2.0 would increase the generation capacity by up to 50 per cent, making up to 2000 megawatts available to the National Electricity Market.

News

Snowy Hydro briefs industry on Snowy 2.0

15/06/2017

Snowy Hydro Limited (SHL) held an industry briefing in Sydney today for a large group of representatives of leading construction and engineering firms on the Snowy 2.0 pumped hydro project.

The industry briefing was told that SHL’s feasibility study was in full swing, with plans in place for geotechnical tests to begin shortly. While it was still early days, the company felt optimistic about the viability of the project and all going well, construction could begin in 2018, subject to the outcomes of the feasibility study.

SHL CEO Paul Broad told the briefing that the Finkel Review’s recommendations of a new Clean Energy Target and Regional Security Obligation offered major opportunities for the Snowy 2.0 pumped hydro project.

Mr Broad said there would be a strong increase in the use of intermittent power in the market – wind and solar – that would require reliable and rapid back-up supply of renewable energy. Snowy 2.0 would help further strengthen the critical role that SHL currently plays in ensuring system security and reliability.

“We are already the largest and most reliable battery storage option for the National Electricity Market. With Snowy 2.0, we will be able to provide an extra 2,000 MW of new renewable capacity and provide increased energy security and stability. This will be crucial as Australia transitions to a low-emissions economy over the next 20 to 30 years,” Mr Broad said.

Mr Broad said the importance of the Snowy 2.0 project was apparent from the participation today by key representatives of leading global and local civil engineering, tunnelling and electrical experts.

“There was strong support for the project from the leading industry players who attended the briefing today, and who are keen to partner with us to deliver this exciting project.There has been nothing like this in Australia since Snowy was completed in the 1970s and we want the best people available to assist us,” Mr Broad said.

Snowy Hydro advised industry that it would be undertaking a three-stage process to procure two packages of services, with one covering civil works and the other electrical/mechanical works.
Expressions of Interest would be called for shortly, with selected suppliers to be shortlisted for an Early Contractor Consultation Phase by late July.

Snowy Hydro Media Enquiries:
Simon Troeth

0439 300 335

e: Simon.Troeth@newgatecomms.com.au

News

Snowy Hydro welcomes Finkel Review

09/06/2017

Snowy Hydro Limited welcomes the support of the Finkel Review of pumped hydro as a key to energy security as it focuses on recommendations aimed at strengthening reliability in the National Electricity Market.

Snowy Hydro CEO Paul Broad said the Snowy 2.0 project would play a key role in both ensuring security of supply and backing up the expected big increase in intermittent supplies – wind and power – in the market.

The report states on p33 that “Battery and pumped hydro storage will be able to support a reliable and secure NEM, as and when they are deployed at scale.”

Mr Broad said the Finkel Review had identified the need to guarantee back-up to any new intermittent power supply projects.

“Snowy 2.0 fulfils the objectives of the Finkel Review on energy security, in that it can uniquely provide the largest scale and affordable storage of renewable energy to support the reliable and secure power supply that is needed for Australia to move safely to a low emissions economy”, Mr Broad said.

“The Finkel review rightly points to the importance of pumped hydro as an essential back-up to intermittent wind and power to protect consumers and business, and ensure we don’t face the catastrophic supply failures that we have seen in South Australia.”

Snowy Hydro also supports market-based mechanisms to achieve the Government’s commitment to climate change targets, as well as stable and long term policy certainty. We will be actively engaging with relevant bodies to implement policies which best meet the energy trilemma of market efficiency, energy security and emission reductions.

Snowy Hydro Media Enquiries:

Simon Troeth

0439 300 335

e: Simon.Troeth@newgatecomms.com.au

www.snowyhydro.com.au

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