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Timber Bridge Replacement Program

Project overview

In 2014, Council commissioned a specialist bridge consultant to review and test all timber road bridges in Yass Valley. Of the 18 timber road bridges in the Local Government Area (LGA) it was identified that 17 of the bridges required either urgent works or load limits.

Since the review, resulting in the implementation of load limits in 2014, Council has replaced two timber road bridges with concrete bridges on Gums Lane (project cost - $200,000) and Dicks Creek Road (project cost - $1.4M). $185,000 has also been spent on upgrades and rehabilitation for four bridges (Bango Lane, Burrinjuck Road x 2 and Garryowen Road).

In late 2017, Yass Valley Council was successful in obtaining significant funding under round 3 of the NSW Government's Fixing Country Roads Program for its Timber Bridge Renewal Program. Under this program, Council will address 11 load limited timber bridge structures, with the project due for completion 2020. These will be replaced by new structures in either concrete or steel. Delivery of this program will address the need to have load limits, thereby providing significant economic benefit to the region's agricultural sector.

Road Name Creek / Bridge Name Current Load Limit
Black Range Road - COMPLETE Derringullen Creek No limit
Burrinjuck Road - COMPLETE Barrenjack Creek No limit
Childowla Road (north of Talmo Road) - COMPLETE Jugiong Creek No limit
Childowla Road (north of Narrangroe Road) - COMPLETE Oak Creek No limit
Childowla Road (south of Narrangroe Road) - COMPLETE Limestone Creek No limit
Graces Flat Road - COMPLETE Two Mile Creek No limit
Horseshoe Road - COMPLETE Mullion Creek No limit
Leake Street - COMPLETE Bowning Creek No limit
Nottingham Road - COMPLETE Micalong Creek No limit
Nottingham Road (south of Micalong Creek) - COMPLETE Nottingham Creek No limit
Yass River Road - COMPLETE Walmsleys Crossing No limit

Key project dates

  • Yass River Road (Walmsleys Crossing) - February - July 2019
  • Black Range Road (Derringullen Creek) - February - July 2019
  • Leake Street (Bowning Creek) - May - July 2019*
  • Graces Flat Road (Two Mile Creek) - July - October 2019*
  • Nottingham Road (Micalong Creek) - July - October 2019
  • Childowla Road (Jugiong Creek) - July - December 2019*
  • Childowla Road (Oak Creek) - September - December 2019*
  • Childowla Road (Limestone Creek) - October - December 2019
  • Burrinjuck Road (Barrenjack Creek) - October 2019 - February 2020*
  • Horseshoe Road (Mullion Creek) - October 2019 - February 2020*
  • Nottingham Road (Nottingham Creek) - November 2019 - February 2020*

*Completion dates for some of the concrete bridges have been revised due to delays from the contractor Tobco.

This works program is dependent on a number of variables (eg. weather) and should act as a guide only.


Project updates & community information

Thursday, 23 January 2020

Steel Bridge Update

The final stage of the steel bridges replacement program is almost completed! Complete Civil have been finalising the road approaches over the last couple of weeks on all four sites in preparation for sealing late next week or early the following.

The installation of guardrail for the bridge over Micalong Creek in Wee Jasper is underway, followed closely by the guardrail on the Childowla Road bridge. Once this is complete, signage installation and sealing works will be undertaken followed by a final inspection prior to the official openings.

Council have arranged official openings for the remaining two steel bridges with our Local Member, Hon Wendy Tuckerman to be officiating. The first for the Childowla Road bridge will be held in conjunction with the two new concrete bridges on Childowla Road on Wednesday 19 February – time to be confirmed.

The second opening for the bridge over Micalong Creek in Wee Jasper will be held in conjunction with the new concrete bridge on Nottingham Road on Wednesday 11 March – time to be confirmed. 

Concrete Bridge Update

The final stage of our concrete bridge replacement project is nearly complete! Tobco have made excellent progress on the final bridge on Nottingham Road in Wee Jasper. The piling and abutment works for this bridge are now completed and the contractors are currently working on scour protection before moving onto laying the bridge planks. We are hopeful this bridge will be opened in the next 2-3 weeks.

The bridge on Horseshoe Road has now also been completed with the bypass demolished.

Council have arranged two official openings for the remaining six concrete bridges with our Local Member, Hon Wendy Tuckerman to officiate. The first opening will be for the two bridges on Childowla Road, as well as the Burrinjuck Road bridge and the Graces Flat Road bridge. This will be held on Wednesday, 19 February  – time to be confirmed.

The second opening for the Horseshoe Road bridge and Nottingham Road bridge in Wee Jasper will be held on Wednesday, 11 March – time to be confirmed.

Friday, 20 December 2019

Steel Bridge Update

The second stage of the steel bridges replacement program is nearly completed, the team from Complete Civil have really pushed to get the majority of this work done prior to the Christmas break.

The bridge over Micalong Creek in Wee Jasper is now open! There are still some minor works to be undertaken including guardrail installation, signage and the sealing of the approaches which will all occur in early 2020.

The Childowa Road bridge over Limestone Creek is also nearly finished. The bulk of the bridge and abutments works are completed and once the Yass side abutment wall has cured the remaining earthworks can be undertaken and the last of the bridge decking placed. Once this work is finalised we can open the bridge up to the public, this will be first thing in January 2020.

There are still minor works to be done on Derringullen Bridge on Black Range Road and Walmsley Bridge on Yass River Road, including finalisation of the road and sealing the approaches. It has been noted that the Yass side of Derringullen Creek bridge has a reasonable bump on the approach, this will be temporarily repaired before the break and reworked in preparation for sealing in January 2020.

We are very pleased with the outcome this year with 3 large bridges completed and the last one very close. All outstanding works including tidying up, sealing of approaches and re-vegetation will be completed by January 2020.

Concrete Bridge Update

We have had a very busy last month of 2019 and seen our contractors Tobco working hard to finalise as much as possible prior to the holidays. We have recently opened the new bridge on Horseshoe Road this week and are still working on demolishing the bypass track, tidying up batters and sealing the approaches.

The final bridge in the program is the Nottingham Road bridge. Tobco have almost completed the piling which has had quite a few delays due to unforeseen ground conditions however we have pushed on and now are allowing them to cure over the break. The team will be back in early January to complete this last bridge.

We are very pleased with the outcome this year with 6 bridges completed and the last one very close. All outstanding works including general tidying up and re-vegetation will be completed by January 2020.

Monday, 28 November 2019

Steel Bridge Update

The second stage of the steel bridges replacement program is coming along well, the team from Complete Civil have pushed to get the bulk of this work done prior to the Christmas break.

The bridge over Micalong Creek in Wee Jasper has now been “launched”! The team are currently working on building the road approaches and we are still hopeful this will be traffic-able prior to the Christmas holidays. As previously mentioned no work will be undertaken over the break at this site.

Works are also progressing well on the Childowa Road bridge over Limestone Creek. This bridge has also been launched and works commenced on the retaining walls and decking panels. We are still aiming to have this final bridge open to traffic late January, early February 2020.

As mentioned previously there are still minor works to be done on Derringullen Bridge on Black Range Road and Walmsley Bridge on Yass River Road, including finalisation of the road and sealing the approaches. This is expected to be completed early in the new year in line with the sealing of the other two bridges.

We are very happy with the progress of these 4 large steel bridges, as mentioned all works including tidying up, sealing and re-vegetation should be completed by February 2020. 

Concrete Bridge Update

Tobco have opened to traffic, the two bridges on Childowla Road and one on Burrinjuck Road. There are still minor outstanding works to happen on these sites including the removal of the existing side track at Burrinjuck, re-vegetation and general tidying up which will all be happening over the next month.

The next bridge in the program is the Horseshoe Road bridge. Currently the team have completed the headstocks and are getting ready to place the planks early next month. With all things going to plan Horseshoe Road bridge should be open to traffic prior to the Christmas break.

The final bridge in this replacement program is the Nottingham Road bridge. The team have completed all the preliminary works but there were a couple of issues which ha delayed the progress and in conjunction with the total fire ban, the demolition of the timber bridge was pushed back. We have carried on and the piling is now due to begin the first week of December. We are hoping to have the headstocks poured prior to the Christmas break with all remaining works to occur early January 2020.

All works including tidying up and re-vegetation will be completed by January 2020.

Monday, 28 October 2019

Steel Bridge Update

The second stage of the steel bridges replacement program is well underway with the Micalong Creek Bridge in Wee Jasper really taking shape. All the piles are completed and the abutments have been poured. The team from Complete Civil have and continue to make excellent progress with this site. Council are hopeful to have this open to traffic in time for the start of the school holidays. No works will be commencing on site during this break.

Works are also progressing well on the Childowa Road bridge over Limestone Creek. The piling is also completed here and abutment works are commencing early November. Council are aiming to have this final bridge open to traffic late January, early February 2020.

There are still minor works to be done on Derringullen Bridge on Black Range Road and Walmsley Bridge on Yass River Road, including finalisation of the road and sealing the approaches. This is expected to be completed early in the new year in line with the sealing of the other two bridges.

Concrete Bridge Update

Council have recently opened to traffic the second of our seven concrete bridges, the Graces Flat Road bridge earlier this month. There are still outstanding works to happen on this site including the removal of the existing side track, some fencing, re vegetation and tidying up which will all be happening over the next month or so.

The next bridges to be open will be the Childowla Road bridges which are really taking shape. The deck planks have now been placed on Childowla Road bridge 1 with earthworks and guardrail installation occurring in the coming weeks. At Childowla Road bridge 2 the team are working on the final pavement trim followed by the guardrail installation. We hope to see both of these bridges open to traffic by mid-November.

The team at Tobco have also made good progress on the Burrinjuck Road bridge with all piles now poured and the head-stocks underway. Works have also commenced on Horseshoe Road bridge with the piling now underway. The final remaining bridge on Nottingham Road is programmed to commence works in the next couple of weeks.

We are still on track to have all seven bridges open to traffic before Christmas with tidy up works planned in the new year all things going well. 

Monday, 2 September 2019

Steel Bridge Update

Derringullen Bridge on Black Range Road and Walmsley Bridge on Yass River Road were officially opened at the end of July. Over the last couple of weeks the team at Complete Civil have been removing the existing timber bridges. There are still minor works to be done on these two sites, including finalisation of the road and sealing the approaches. This is expected to be completed by the end of November.

The second stage of the steel bridge replacement program includes the Micalong Creek Bridge in Wee Jasper and the third Bridge on Childowa Road over Limestone Creek. Works are expected to commence at Micalong Creek the first week of September and will include the construction of an access track, earthworks and demolition of the existing bridge. Shortly after this Complete Civil will begin works at the Childowla site and will work concurrently between both bridges.

It is expected the bridge at Micalong Creek will be completed by mid-December at the latest and the final bridge on Childowla Road by January/February.

Concrete Bridge Update

Leake Street Bridge was officially opened at the end of July, it is now completely finished with the hand rails installed and rock scour protection finalised.

The second bridge in our program is Graces Flat Road. This bridge is really starting to take shape now, the planks have been placed on the abutments with the grouting and sealing to occur in the next week. Once this is complete, works will continue on the road, the scour protection and the removal of the low level bypass. The bridge should be open by end of September at the latest, weather permitting.

The team at Tobco have also made good progress on bridges three and four both on Childowla Road. The piling is completed for both sites and the abutment works are well underway. It is expected that these two bridges should be open by the end of October/mid- November, weather permitting.

The remaining three bridges, Burrinjuck Road, Horseshoe Road and Nottingham Road are also proceeding well. All designs are now finalised and works will commence at Burrinjuck early September, Horseshoe and Nottingham in October/November. 

Thursday, 1 August 2019

Overall Project Update

The first 3 of the 11 timber bridges to be replaced as part of Councils Timber Bridge Replacement Program are now officially open. Derringullen Bridge on Black Range Road, Walmlsey’s Bridge on Yass River Road and the Leake Street Bridge in Bowning are now open to traffic and no longer have a load limit.

The remaining 6 concrete Bridges are all currently underway in some part. The Graces Flat Road Bridge is taking shape with both abutments now poured and currently curing. Childowla Road Bridge 1 and 2 have both been demolished with the piling complete on Bridge 1 and preparing to begin on Bridge 2.

For Burrinjuck Road, Horseshoe Road and Nottingham Road (Seg 28) Bridges, we are currently working through the final design stages with the contractor. Works will commence on the Burrinjuck Road Bridge after the Childowla Road 2 Bridge is finalised - this is expected to be toward the end of September at this stage.

There are 2 remaining steel bridges to be constructed, the first will be at Micalong Creek in Wee Jasper. It is anticipated the works will commence on site early September with the final steel bridge on Childowla Road (Seg 18) to commence toward the end of the year.

Monday, 1 July 2019

Childowla Road - Jugiong Creek bridge and Oak Creek bridge

Tobco have advised that preliminary works will begin on the first two bridges on Childowla Road this week. This will include the demolition of the existing timber bridges and the setup of traffic and environmental controls.

Thursday, 27 June 2019

Childowla Road - Jugiong Creek bridge and Oak Creek bridge

Tobco have advised that they will be commencing at the two Childowla bridge sites in August, if not sooner. Once demolition of these bridges has been completed, piling and abutment works will follow.

Leake Street Bridge (Bowning) & Graces Flat Road Bridge

The Leake Street bridge is starting to take shape. The planks have now been placed on the abutments with the grouting and sealing to occur in the next week. Once this is complete works will begin on the drainage, walkway and road works. We are hopeful this bridge will be open by the end of July, weather permitting.

The team at Tobco have also commenced works on the second bridge on our replacement program – Graces Flat Road. The existing bridge has been demolished and the piling has now commenced. At this stage we expect to have Graces Flat completed by the end of August, beginning of September.

Derringullen Bridge (Black Range Road) & Walmsley Bridge (Yass River Road)

Derringullen Bridge (Black Range Road) has been launched, which means the bridge is in place on the abutments. The team at Complete Civil are currently completing the concrete retaining walls, which will then require several days of curing time. Once these structures are complete the placing of the decking panels and the earthworks/roadworks shall continue. We are hopeful that the bridge will be completed by mid-July, weather permitting.

Walmsleys Crossing (Yass River Road) has also been launched. Complete Civil are working concurrently with the Derringullen site to get the retaining walls formed up and poured. Once the team finishes at Derringullen they will be finalising the Walmsley site. We hope to be completed by the end of July at the latest, weather permitting.

Thursday, 23 May 2019

Graces Flat Road bridge

Council’s contractor Tobco will be starting works at the Graces Flat Road bridge site this week. It is planned that the closure of the existing bridge will be undertaken at the end of the week, with signage in place to direct all traffic to use the bypass track and give way whilst doing so. Demolition of the existing timber bridge is scheduled for next week. Council anticipates that the works to be completed by the end of July but as always this is weather dependent.

Thursday, 16 May 2019

Derringullen Bridge (Black Range Road) & Walmsley Bridge (Yass River Road)

Council's contractor plans to commence assembly of the new Derringullen Bridge (Black Range Road) on Monday, 27 May. All works should be undertaken off the road with no additional impacts expected to motorists.

The majority of the componentry has also now been delivered to the Walmsleys Bridge site (Yass River Road). The contractor will commence assembling this bridge as soon as work is completed at Derringullen Bridge, which will be approximately June.

Tuesday, 30 April 2019

Derringullen Bridge (Black Range Road) & Walmsley Bridge (Yass River Road)

The abutments at Derringullen are now complete and fully cured, as well as the bulk earthworks to improve the site distance of the bridge approach. Complete Civil have now started to move the bridge componentry to the site so the construction of the actual bridge can begin prior to the ‘launching’ of the bridge towards the end of the project.

The abutments at Walmsleys are underway at present and it is expected they will be completed by mid-May. Whilst the abutment work is undertaken the steel componentry will also be delivered to the site.

It is expected that the bridge ‘launchings’ shall occur one after the other with Derringullen scheduled for early June and Walmsleys for mid/end of June. Once this has occurred the final processes of demolition of the existing structures, road works and reestablishment shall be carried out. We anticipate both bridges to be completed by the end of July, mid-August at the latest.

Leake Street Bridge (Bowning) & Graces Flat Road Bridge

The Leake Street bridge replacement is well underway. Tobco (contractor) are making good progress on the site with the existing bridge demolished and the piles set to be poured over the next couple of weeks. Once these are cured the bearing strips will be installed followed by the bridge planks. Tobco are expecting to open the new bridge by mid-June.

The next bridge to be replaced will be on Graces Flat Road. Works shall commence on site over the next couple of weeks, this will then be followed by the first bridge on Childowla Road (Jugiong Creek) commencing around mid-June.

Wednesday, 27 March 2019

Derringullen Bridge (Black Range Road) & Walmsley Bridge (Yass River Road)

Complete Civil are proceeding as per the agreed schedule for both the Derringullen Bridge (Black Range Road) and Walmsley Bridge (Yass River Road) replacements. The first of the two abutments for the Derringullen Bridge site are almost constructed and the concrete should be poured later in the week, once this occurs the first abutment will be left to cure whilst work begins on the second.

Complete Civil will be moving to the Walmsley site mid-April to cut off and prepare the piles and begin constructing the abutments. It is expected the concrete for these two abutments will be poured around the end of April.

Once the abutments have cured at the Derringullen Bridge site the steel bridge components will be transferred to site and earthworks will begin, it is at this stage that traffic control may be put in place to allow some works to take place on the existing road – further information will be provided as this stage of the works approaches.

Complete Civil will also be working on the Walmsley Bridge site concurrently to transport the steel bridge components and prepare the earthworks.

This project is going well with completion expected towards the end of June.

Leake Street Bridge (Bowning) & Graces Flat Road Bridge

The design work for the first of Council’s seven concrete bridges is now complete. The contractor, Tobco, are planning the establish the Leake Street Bridge site during early-mid April. During establishment Tobco will be setting up a site compound, implementing the bridge closure and detour, setting up their work zone and commencing with the existing bridge removal. Leake Street will be a ‘no through road’ during the construction of the new bridge.

It is expected that the replacement of the Leake Street Bridge will take approximately 8 weeks – with updates to be provided once works are underway.

The second bridge to be replaced will be Graces Flat Road Bridge with works expected to commence at the end of April – early May, subject to design approvals. Council will provide an update as design works progress.

Friday, 22 February 2019

Complete Civil are making good progress with the Derringullen (Black Range Road) and Walmsleys (Yass River Road) bridge sites, with all works generally on schedule. The piling will be the next stage in the construction process. Piling works will be starting on Derringullen Bridge on Tuesday 26th February 2019 and should be completed by early March 2019. At this stage Walmsleys will be commencing on the 4th of March 2019 and is expected to take approximately 1 week. Piling can be a noisy part of the construction process as the contractors will be drilling into rock to create the supporting structures for the bridges. Council apologise if this causes any inconvenience. It is not anticipated that these works will impact on current traffic conditions. Once the piling is completed works will commence on the bridge abutments.

Wednesday, 30 January 2019

Complete Civil have commenced preliminary works for the replacement of Walmsleys Bridge (Yass River Road), with preliminary works on the Derringullen Bridge (Black Range Road) site to commence next week. These two bridges will continue throughout the project, to be built concurrently.

Tobco have been engaged by Council to undertake the design and construction of the seven (7) concrete bridges. The design component of this project is well underway with the first of these bridges – Leake Street (Bowning) set to begin at the end of March.

Childowla Road (Limestone Creek) & Nottingham Road (Micalong Creek) are still currently going through the tender process. It is anticipated that the contract will be awarded after the March Council Meeting.

Friday, 18 January 2019

Complete Civil has been engaged by Council to undertake the replacement of Walmsleys Bridge (Yass River Road) and Derringullen Bridge (Black Range Road). The preliminary works for Walmsleys Bridge will commence on Monday, 21 January 2019.
 
This initial work should not impact road users but there will be traffic control measures in place, for the safety of contractors working on the site. After the preliminary works are completed at the Walmsleys Bridge location Complete Civil will move onto the Derringullen Bridge site. While the Derringullen Bridge is scheduled to be the first bridge to be replaced, works will occur simultaneously on both.

Note: Council has established a communication database to liaise directly with community members interested in receiving updates on Council's Timber Bridge Replacement Program. If you would like to be included, please call (6226 1477) or email (Council@yass.nsw.gov.au) and ask to be included on the Timber Bridge Replacement Program email database.


Frequently Asked Questions - FAQs

What standards will the replacement timber road bridges be?

There are number of factors which determines the standard of the replacement bridge, including how far the bridge needs to span and the number and type of vehicles that might use the bridge in the future. For the current bridges proposed to be replaced:

  • Yass River, Black Range, Nottingham Road (at Micalong Creek) and Childowla Road (south of Narrangroe Road) will be two-lane (one in each direction) steel bridges. Due to the span required for these particular bridges (over 11 metres) Council will use 4 ex-military prefabricated modular steel bridges, which were purchased in 2015, as a permanent, well priced solution to replace the longer spanned load limited timber bridges.
  • Graces Flat Road and Leake Street bridges will be replaced with two-lane concrete bridges. Concrete has been chosen for these bridges as they are both under 10 metres in length. They will be two lanes because of their higher vehicle movements.
  • Childowla Road (north of Talmo Road and north of Narrangroe Road), Nottingham Road (south of Micalong Creek), Horseshoe Road and Burrinjuck Road (just before Burrinjuck Dam) bridges will be replaced, at this stage, with single-lane concrete bridges. The span of these bridges range between 8-11m, are located on roads that are only 3.5 - 4.5m in width and generate minimal traffic.
  • For each of these bridges Council will review the width of the proposed bridge in each location to see if funds are available to construct a two-lane bridge once actual individual bridge construction costs are known.

Will vehicle access be impacted by this bridge construction program?

During the construction period the access arrangements detailed below will be implemented/maintained, with the potential of temporary delays for short periods during specific construction activities:

  • Yass River Road and Black Range Road will continue to use the existing timber bridges while the new bridges are built beside them. Possible disruptions to this arrangement may occur during particular construction activities.
  • Childowla Road (all 3 bridges), Nottingham Road (south of Micalong Creek), Graces Flat Road, Horseshoe Road and Burrinjuck Road all have suitable side track bypasses that will be utilised by all vehicles during the construction of the new bridges.
  • Leake Street has an easily accessable alternate route which is to be used by all traffic during construction.
  • Nottingham Road (at Micalong Creek) currently has a ‘sub-standard’ bypass track. Upgrades to this bypass will be carried out prior to any bridge works commencing.

How will Council communicate with the community during the replacement of the 11 timber road bridges?

Residents directly impacted by this Program have been invited (in writing) to request direct communication about the program. This will enable Council to contact impacted residents directly with major program milestones, monthly updates, as well as unscheduled disruptions or impacts due to weather events.

In addition to this, Council will keep the community informed through our website, social media platforms and Council and community newsletters.

How many road bridges does Council manage?

79

What type of road bridges are they?

61 concrete and 18 timber.

There are still 5 timber road bridges not currently being addressed in this Program. What is the future for the remaining 5 timber bridges in Yass Valley?

One bridge on Mulligans Flat Road will be replaced with a two lane concrete bridge in 2019 as part of the final upgrade and sealing of this road.

The remaining 4 timber bridges (Bango Lane, Garryowen Road and the 2 on Burrinjuck Road) are not load-limited at present and will be subject to annual monitoring and expected to be progressively replaced over the next 10 -15 years, as funding becomes available.

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