Flood recovery works

  

Last updated 20 March 2023

Work to repair the significant landslip on Tyalgum Road is set to progress, with a $16 million contract awarded to local construction company SEE Civil Pty Ltd.

The contract was awarded following an extensive tendering process, supported by a Letter of Agreement from Transport for NSW, and will allow the contractor to progress design work from 30% to 100%.

A further $4 million will go towards additional costs on the project, such as land acquisition and site work, bringing the total cost of the Tyalgum Road landslip repair to $20 million.

SEE Civil is also the preferred contractor for the $2.3 million project to restore the two slips on Limpinwood Road – the main alternative access route to Tyalgum village. Transport for NSW is currently assessing the proposed works prior to Council awarding of the contract.

Design work for Tyalgum Road is expected to take until late May to complete, with work expected to start on site around the same time.

The contractor’s design work will include the provision of temporary access through the Tyalgum Road site, with the aim for this to be in place by the latter quarter of this year.

Limpinwood Road will remain open to one lane as per the current situation while reconstruction work takes place, which is also expected to start at the end of May.

Mayor of Tweed Shire Chris Cherry said it was great to finally see progress on restoration of the Tyalgum Road landslip.

“This is the biggest and most complex of the Tweed’s landslips caused by the devastating flood of February-March last year and today’s announcement represents a significant milestone in the Shire’s recovery,” Cr Cherry said.

The major landslip on Tyalgum Road is about 950 metres east of Van Den Broek Road. There is another slip about 1 km west of this major landslip.

The damage site is more than 100 metres in width, some 60 metres in length and appears to comprise of some 6-10 metres depth of material which has slipped.

One-way traffic arrangements at the secondary landslip site, about 1 km west of the main slip, will remain in place.

The process of rebuilding

The list below summarises the high level processes we need to follow to fix the landslips at Tyalgum Road. Given our current knowledge of the sites, it’s difficult to provide accurate dates for each part of the process. There may be opportunities to run some of those in parallel however, we won’t know until we start to confirm the preferred solution. The outline below will give you an idea of why the works will take at least 12 months.

• Geotechnical procurement (completed)

Fixing landslips is a complex engineering task. It is crucial that the foundation of the slip is properly stabilised to prevent a similar failure occurring in the future. Specialist geotechnical engineers are used by Council to investigate the best option suited to Tyalgum Road’s specific site conditions. Only then can the missing piece of road be constructed over this new foundation.

The geotechnical assessment is broken up into 2 stages:

• Stage 1 is a preliminary assessment to make recommendations about the short term safety of the site.
• Stage 2 involves boring holes to investigate the soil in and around the slip including scientific testing, this information is used to determine options to fix the slip.

• Design and construction tender (awarded)

We draft a design and construction document in preparation for the tender process. We then advertise the tender, evaluate all submissions then select the preferred tenderer based on the NSW legislation and our Procurement Policy which define specific processes and minimum timeframes. The tenderer then develops the design for approval by Council and Transport for NSW.

• Environmental assessment (ongoing)

All work Council undertakes, including the repairs required on Tyalgum Road, requires approval under the Environmental Planning and Assessment Act – in much the same way as residents need a Development Approval to carry out renovations on their homes. This is to ensure there is minimal environmental impact during the construction of the work and that the final construction won’t cause any additional impacts to residents or the environment.

• Consultation with the community (ongoing)

We will consult with residents and businesses who will be directly impacted by the works to ensure they are not adversely affected by our activities. If they are, we will put in place measures to minimise these impacts.

There are several properties through which we are likely to require access to carry out the work.

• Construction

At high level, a typical construction process to fix significant damage such as those sustained along Tyalgum Road would involve site establishment, excavation of slip areas, foundation works, wall construction or stabilisation structural works as well as earthworks, drainage, road subbase, pavement, line marking and safety barrier works.

  

Last updated 20 March 2023

Civil Mining & Construction Pty Ltd has been selected for three contracts worth more than $28 million to restore three sites on Kyogle Road.

At its meeting on 2 March, Council selected Civil Mining & Construction Pty Ltd  to commence on completing designs and construction of the landslips on Kyogle Road.

Transport for NSW is currently assessing the proposed works prior to Council’s awarding of the contract.

Guardrail installation has been completed between Palmers Road and Clarrie Hall Dam Road.

Motorists are advised to watch for changed traffic conditions and to follow workplace signage.

Speed zones are enforceable and are designed to keep both road crews and motorists safe.

Major landslips on Kyogle Road are located 500 m to 1.6 km west of Byangum Bridge.

Other slips along Kyogle Road allow 2 way traffic to pass but heavily constrict traffic. We ask motorists to proceed with caution.

The process of rebuilding

The list below summarises the high level processes we need to follow to fix the landslips at Kyogle Road. Given our current knowledge of the sites, it’s difficult to provide accurate dates for each part of the process. The outline below will give you an idea of the works involved.

• Geotechnical procurement (completed)

Fixing landslips is a complex engineering task. It is crucial that the foundation of the slip is properly stabilised to prevent a similar failure occurring in the future. Specialist geotechnical engineers are used by Council to investigate the best option suited to Kyogle Road’s specific site conditions. Only then can the missing piece of road be constructed over this new foundation.

The geotechnical assessment is broken up into 2 stages:

• Stage 1 is a preliminary assessment to make recommendations about the short term safety of the site.
• Stage 2 involves boring holes to investigate the soil in and around the slip including scientific testing, this information is used to determine options to fix the slip.

• Design and construction tender (underway)

We draft a design and construction document in preparation for the tender process. We then advertise the tender, evaluate all submissions then select the preferred tenderer based on the NSW legislation and our Procurement Policy which define specific processes and minimum timeframes. The tenderer then develops the design for approval by Council and Transport for NSW.

• Environmental assessment

All work Council undertakes, including the repairs required on Kyogle Road, requires approval under the Environmental Planning and Assessment Act – in much the same way as residents need a Development Approval to carry out renovations on their homes. This is to ensure there is minimal environmental impact during the construction of the work and that the final construction won’t cause any additional impacts to residents or the environment.

• Consultation with the community

We will consult with residents and businesses who will be directly impacted by the works to ensure they are not adversely affected by our activities. If they are, we will put in place measures to minimise these impacts.

There are several properties through which we are likely to require access to carry out the work.

• Construction

At high level, a typical construction process to fix significant damage such as those sustained along Kyogle Road would involve site establishment, excavation of slip areas, foundation works, wall construction or stabilisation structural works as well as earthworks, drainage, road subbase, pavement, line marking and safety barrier works.

At this stage, it is difficult to estimate the time required by the contractor to complete the works as it is dependent on the geotechnical solution as well as the expertise and resources of the contractor.

  

Last updated 6 March 2023

A significant step forward in the repair of Reserve Creek Road has been achieved with the Transport for NSW confirmation to award the contract to SEE Civil Pty Ltd.

The contract, worth $5,978,367, will allow SEE Civil Pty Ltd to progress design work from 30 percent to 100 percent completion with initial work expected to start after Easter.

Work on site can then commence with the aim of having a temporary access part way through construction roughly 7 weeks after site work begins.

The Reserve Creek Road landslip presents a major design and engineering challenge, with the road significantly undermined by a 15-metre high, near-vertical landslip which occurred during the February-March flood.

Transport for NSW has confirmed funding approval to cover the cost of repairs.

Council is aware of the issues facing the local community and the significant connectivity impacts associated with the road closure and has therefore prioritised the possibility of providing a one lane temporary access with the contractor which will be confirmed during the remaining design period.

The process of rebuilding

The list below summarises the high level processes we need to follow to fix the landslip at Reserve Creek Road. Given our current knowledge of the sites, it’s difficult to provide accurate dates for each part of the process. There may be opportunities to run some of those in parallel however, we won’t know until we start to confirm the preferred solution. The outline below will give you an idea of why the works will take at least 12 months.

• Geotechnical procurement (completed)

Fixing landslips is a complex engineering task. It is crucial that the foundation of the slip is properly stabilised to prevent a similar failure occurring in the future. Specialist geotechnical engineers are used by Council to investigate the best option suited to Reserve Creek Road’s specific site conditions. Only then can the missing piece of road be constructed over this new foundation.

The geotechnical assessment is broken up into 2 stages:

• Stage 1 is a preliminary assessment to make recommendations about the short term safety of the site.
• Stage 2 involves boring holes to investigate the soil in and around the slip including scientific testing, this information is used to determine options to fix the slip.

• Design and construction tender (underway)

We draft a design and construction document in preparation for the tender process. We then advertise the tender, evaluate all submissions then select the preferred tenderer based on the NSW legislation and our Procurement Policy which define specific processes and minimum timeframes. The tenderer then develops the design for approval by Council and Transport for NSW.

• Environmental assessment

All work Council undertakes, including the repairs required on Reserve Creek Road, requires approval under the Environmental Planning and Assessment Act – in much the same way as residents need a Development Approval to carry out renovations on their homes. This is to ensure there is minimal environmental impact during the construction of the work and that the final construction won’t cause any additional impacts to residents or the environment.

• Consultation with the community

We will consult with residents and businesses who will be directly impacted by the works to ensure they are not adversely affected by our activities. If they are, we will put in place measures to minimise these impacts.

There are several properties through which we are likely to require access to carry out the work.

• Construction

At high level, a typical construction process to fix significant damage such as those sustained along Reserve Creek Road would involve site establishment, excavation of slip areas, foundation works, wall construction or stabilisation structural works as well as earthworks, drainage, road subbase, pavement, line marking and safety barrier works.

At this stage, it is difficult to estimate the time required by the contractor to complete the works as it is dependent on the geotechnical solution as well as the expertise and resources of the contractor.

  

Last updated 20 March 2023

SEE Civil Pty Ltd has been named as the preferred contractor for the $2.3 million project to restore the two slips on Limpinwood Road – the main alternative access route to Tyalgum village.

This includes the slips near Boxsell Road and Charbray Place.

Limpinwood Road will remain open to one lane as per the current situation while reconstruction work takes place, which is also expected to start at the end of May.

Transport for NSW is currently assessing the proposed works prior to Council awarding of the contract.

The process of rebuilding

Listed below summarises the high level processes we need to follow to fix the landslips at Limpinwood Road. Given our current knowledge of the site, it’s difficult to provide accurate dates for each part of the process. There may be opportunities to run some of those in parallel however, we won’t know until we start to confirm the preferred solution. The outline below will give you an idea of the works involved.

• Geotechnical assessment (completed)

Fixing landslips is a complex engineering task. It is crucial that the foundation of the slip is properly stabilised to prevent a similar failure occurring in the future. Specialist geotechnical engineers are used by Council to investigate the best option suited to Limpinwood Road’s specific site conditions. Only then can the missing piece of road be constructed over this new foundation.

The geotechnical assessment is broken up into 2 stages:

• Stage 1 is a preliminary assessment to make recommendations about the short term safety of the site.
• Stage 2 involves boring holes to investigate the soil in and around the slip including scientific testing, this information is used to determine options to fix the slip.

• Funding submissions (underway)

To secure funding, we will need to seek approval for the preferred solution from Transport for NSW, which includes cost estimates based on the geotechnical investigations.

• Design and construction tender (awarded)

We draft a design and construction document in preparation for the tender process. We then advertise the tender, evaluate all submissions then select the preferred tenderer based on the NSW legislation and our Procurement Policy which define specific processes and minimum timeframes. The tenderer then develops the design for approval by Council and Transport for NSW.

• Environmental assessment

All work Council undertakes, including the repairs required on Limpinwood Road, requires approval under the Environmental Planning and Assessment Act – in much the same way as residents need a Development Approval to carry out renovations on their homes. This is to ensure there is minimal environmental impact during the construction of the work and that the final construction won’t cause any additional impacts to residents or the environment.

• Consultation with the community

We will consult with residents and businesses who will be directly impacted by the works to ensure they are not adversely affected by our activities. If they are, we will put in place measures to minimise these impacts.

There are several properties through which we are likely to require access to carry out the work.

• Construction

At high level, a typical construction process to fix significant damage such as those sustained along Limpinwood Road would involve site establishment, excavation of slip areas, foundation works, wall construction or stabilisation structural works as well as earthworks, drainage, road subbase, pavement, line marking and safety barrier works.

At this stage, it is difficult to estimate the time required by the contractor to complete the works as it is dependent on the geotechnical solution as well as the expertise and resources of the contractor.

 

Last updated 20 March 2023

Civil Mining & Construction Pty Ltd has been selected to restore Mt Warning Road worth more than $11 million.

The contractor can now proceed with Concept designs which have been 30 percent completed and prepare them for 100% completion.

Transport for NSW is currently assessing the proposed works prior to Council’s awarding of the contract.

The temporary sealed side-track was installed to provide access past a landslip that destroyed a length of road. 

The process of rebuilding

The list below summarises the high level processes we need to follow to fix the landslip at Mount Warning Road. Given our current knowledge of the sites, it’s difficult to provide accurate dates for each part of the process. There may be opportunities to run some of those in parallel however, we won’t know until we start to confirm the preferred solution. The outline below will give you an idea of why the works will take at least 12 months.

• Geotechnical procurement (completed)

Fixing landslips is a complex engineering task. It is crucial that the foundation of the slip is properly stabilised to prevent a similar failure occurring in the future. Specialist geotechnical engineers are used by Council to investigate the best option suited to Mount Warning Road’s specific site conditions. Only then can the missing piece of road be constructed over this new foundation.

The geotechnical assessment is broken up into 2 stages:

• Stage 1 is a preliminary assessment to make recommendations about the short term safety of the site.
• Stage 2 involves boring holes to investigate the soil in and around the slip including scientific testing, this information is used to determine options to fix the slip.

• Funding submissions (underway)

To secure funding, we will need to seek approval for the preferred solution from Transport for NSW, which includes cost estimates based on the geotechnical investigations.

• Design and construction tender

We draft a design and construction document in preparation for the tender process. We then advertise the tender, evaluate all submissions then select the preferred tenderer based on the NSW legislation and our Procurement Policy which define specific processes and minimum timeframes. The tenderer then develops the design for approval by Council and Transport for NSW.

• Environmental assessment

All work Council undertakes, including the repairs required on Mount Warning Road, requires approval under the Environmental Planning and Assessment Act – in much the same way as residents need a Development Approval to carry out renovations on their homes. This is to ensure there is minimal environmental impact during the construction of the work and that the final construction won’t cause any additional impacts to residents or the environment.

• Consultation with the community

We will consult with residents and businesses who will be directly impacted by the works to ensure they are not adversely affected by our activities. If they are, we will put in place measures to minimise these impacts.

There are several properties through which we are likely to require access to carry out the work.

• Construction

At high level, a typical construction process to fix significant damage such as those sustained along Mount Warning Road would involve site establishment, excavation of slip areas, foundation works, wall construction or stabilisation structural works as well as earthworks, drainage, road subbase, pavement, line marking and safety barrier works.

At this stage, it is difficult to estimate the time required by the contractor to complete the works as it is dependent on the geotechnical solution as well as the expertise and resources of the contractor.

  

Last updated 3 March 2023

A section of Beltana Drive remains closed following advice from geotechnical consultants about the road’s safety.

The damage, caused by the heavy rains of February and March in 2022, resulted in the collapse of the scarp.

To ensure the ongoing safety of road users, the road has been closed at the landslip site.

Beltana Drive is a loop road therefore access to all residents can be maintained. Although some residents will be inconvenienced due to slightly longer travel times.

Bus and rubbish collection services have been advised of this and arrangements have been made for these services.

Roads are closed to keep motorists safe. Please don’t remove or tamper with road closure signs or barriers – it is a serious offence and could result in someone getting hurt or killed.

Geotechnical assessment updates

Borehole drilling works have been completed. Awaiting  geotechnical report.

This is a complex and long process and given the wide extent of damage throughout the Tweed, it is difficult to give an accurate timeline at this stage however it is anticipated the road will be closed for at least 12 months.

The process of rebuilding

Listed below summarises the high level processes we need to follow to fix the landslip at Beltana Drive. Given our current knowledge of the site, it’s difficult to provide accurate dates for each part of the process. There may be opportunities to run some of those in parallel however, we won’t know until we start to confirm the preferred solution. The outline below will give you an idea of why the works will take at least 12 months.

• Geotechnical procurement (underway)

Fixing landslips is a complex engineering task. It is crucial that the foundation of the slip is properly stabilised to prevent a similar failure occurring in the future. Specialist geotechnical engineers are used by Council to investigate the best option suited to Beltana Drive’s specific site conditions. Only then can the missing piece of road be constructed over this new foundation.

The geotechnical assessment is broken up into 2 stages:

• Stage 1 is a preliminary assessment to make recommendations about the short term safety of the site.
• Stage 2 involves boring holes to investigate the soil in and around the slip including scientific testing, this information is used to determine options to fix the slip.

• Funding submissions (underway)

To secure funding, we will need to seek approval for the preferred solution from Transport for NSW, which includes cost estimates based on the geotechnical investigations.

• Design and construction tender

We draft a design and construction document in preparation for the tender process. We then advertise the tender, evaluate all submissions then select the preferred tenderer based on the NSW legislation and our Procurement Policy which define specific processes and minimum timeframes. The tenderer then develops the design for approval by Council and Transport for NSW.

• Environmental assessment

All work Council undertakes, including the repairs required on Beltana Drive, requires approval under the Environmental Planning and Assessment Act – in much the same way as residents need a Development Approval to carry out renovations on their homes. This is to ensure there is minimal environmental impact during the construction of the work and that the final construction won’t cause any additional impacts to residents or the environment.

• Consultation with the community

We will consult with residents and businesses who will be directly impacted by the works to ensure they are not adversely affected by our activities. If they are, we will put in place measures to minimise these impacts.

There are several properties through which we are likely to require access to carry out the work.

• Construction

At high level, a typical construction process to fix significant damage such as those sustained along Beltana Drive would involve site establishment, excavation of slip areas, foundation works, wall construction or stabilisation structural works as well as earthworks, drainage, road subbase, pavement, line marking and safety barrier works.

At this stage, it is difficult to estimate the time required by the contractor to complete the works as it is dependent on the geotechnical solution as well as the expertise and resources of the contractor.

Last updated 15 March 2023

Geotechnical borehole drilling is being carried out to provide information for future works on site.

Temporary repairs have restored 2-lane access on Tweed Valley Way.

This section of Tweed Valley Way is both a roadway and a hydraulic structure. It also provides a crossing for water, sewer, power and telecommunications. It will require various investigations, consultations with local stakeholders, environmental assessment and approvals, engineering design and planning approvals.

Council has applied for funding through the NSW Government Infrastructure Betterment Fund to carry out the work and is waiting from a response to the application. 

A specialist contractor will then be engaged to carry out the works. Given the site’s complexity and other pressing priorities across the Tweed, the permanent works may take up to 2 years to complete.

Read the media release for more information.