Good progress has continued to be made across the site.
At the southern end of the project, road markings and verge finishes were completed in advance of the traffic being switched onto the new A9 southbound carriageway in early March, while earthworks to the west side of the new Stanley/Tullybelton Junction were completed.
The project team began installing drainage on the side road to the west of the junction during April and commenced construction of Tullybelton Road, which connects the east and west via the new A9 overbridge at the new Stanley/Tullybelton Junction.
Topsoiling works progressed at pace and were completed in April. The new road sub-base and surfacing works continued throughout May, in anticipation of the junction becoming operational.
Works also got underway near Pitlandie at Ordie access track, to the south of the site, which involved realigning and kerbing the new side road as it passes beneath the railway viaduct.
At Pitlandie overbridge, kerbing and pavement was laid across the new bridge and barrier installed allowing the overbridge to be used by local traffic. Meanwhile, the installation of Intelligent Transport System (ITS) equipment, which includes closed-circuit TV cameras (CCTV) and variable message signage (VMS) commenced on the west side of Pitlandie. This equipment provides road users with real-time journey information.
At Bankfoot South Junction, works continued on a sewer diversion on the project which concluded in May and surfacing continued on the new slip roads at Bankfoot South Junction.
The final section of the existing A9 carriageway was planed out on the northern section of the project in early Spring, allowing the remaining sections of drainage works on the new northbound A9 carriageway to get underway.
Following this drainage installation, the carriageway construction on the new A9 northbound carriageway continued with the various layers of road pavement being laid to the north of Hunter’s Lodge underpass at Bankfoot North Junction.
Alongside the construction of the new carriageway, works to fill the verge and central reservation with gravel and general finishing works continued. These works will allow the construction of the final layer of surfacing to commence on the A9 northbound carriageway. The installation of the central reserve barrier also commenced in the period.
At Coltrannie overbridge, works continued to surface the approach roads to the bridge and construction of a drystone wall in the area recommenced into May.
At Gelly overbridge, the installation of drainage was completed allowing surfacing works to progress. Works also commenced on the SuDS feature to be provided, south of Gelly overbridge.
Good progress was made with construction of the new southbound carriageway continuing at the southern end of the project which included laying the various layers of cement bound and asphalt material required to create the new road surface.
Work also progressed in this area to create a new footpath/cycleway in parallel with the A9 carriageway, forming part of the new link for non-motorised users, connecting Luncarty and Bankfoot. More information on Active Travel and the new route being constructed as part of the project can be found here.
At the new Stanley/Tullybelton Junction, operations focused on the northbound slip roads with drainage and foundation layers being installed ahead of asphalt surfacing on the diverge slip-road.
Between the new Stanley/Tullybelton Junction and Bankfoot North Junction, drainage works continued to progress in the period and were installed for the new northbound carriageway.
Preparation work was able to get underway to construct the new Bankfoot South Junction in December, with traffic switched onto a temporary diversion at this location prior to the Christmas period. Moving the traffic away from the main junction has allowed several operations to commence here including drainage works for the A9 carriageway, slip road drainage and essential utility diversion works including BT, Scottish Water and National Grid.
At Hunter’s Lodge in Bankfoot, surfacing work was completed to the northern footpath on the C408 following the installation of utilities and the final structural concrete pours to upgrade Hunter’s Lodge overbridge were completed in December, with finishing work being undertaken in parallel.
To the north of Bankfoot, drainage work progressed alongside planing of the existing old northbound A9 carriageway to remove the old surfacing in advance of the road being upgraded. In order to upgrade the existing A9 between Bankfoot North Junction and the northern extent of the project, widening of existing foundation layers was required in advance of the main carriageway construction. Good progress was also made to divert utilities with new cabling and ducting being installed in this area.
The construction team also progressed several side roads and access tracks throughout winter. Road pavement layers were constructed to the side road and access track to the east of Pitlandie overbridge along with the access track to Newmill farm, adjacent to the Stanley/Tullybelton Junction.
December saw the final structural concrete pours on the project at the Gelly overbridge in the north of the project. Operations on the structures across the project, such as waterproofing and finishing work, recommenced in late February alongside the sand-carpet layer to the Stanley/Tullybelton overbridge, which is placed above the concrete bridge deck in advance of the asphalt surfacing.
Progress continued on landscaping to the embankments adjacent to the Stanley/Tullybelton Junction through the winter months, where the weather conditions allowed.
Road surfacing works progressed at pace along the mainline A9 with significant progress noticeable at various locations throughout the site.
Works continued to construct the slip roads at the new Stanley/Tullybelton Junction and the Luncarty Link Road throughout September, and by the end of the month, the new Luncarty Link Road was opened to traffic for the first time.
Surfacing of the new southbound A9 carriageway continued between Bankfoot North Junction and Luncarty North Junction ahead of a new phase of traffic management. As part of this new traffic management arrangement, A9 traffic was successfully switched onto this new section of carriageway between the two junctions on 17 November, meaning road users are able to drive on new A9 carriageway for the entire journey through the works area.
This traffic switch allowed works to progress on several other key areas of the project. The contractor was able to commence works to upgrade Bankfoot South Junction and the now unlocked existing A9 carriageway between Luncarty and Bankfoot North Junction.
During the period, access from the A9 Northbound to the Bankfoot South Junction moved approximately 40 metres south to a temporary junction to facilitate the construction of upgrades to Bankfoot South Junction.
In addition, the slip roads on the east side of the new Stanley/Tullybelton Junction came into operation, providing access to the U38 Stanley Road and the new Luncarty Link Road, while the existing at grade junction to the north of Luncarty closed permanently.
Works on the old A9 carriageway included planing off the old road surfacing. This is being re-used elsewhere on the project in the foundation layers of some of the access tracks being constructed as part of the works. Carriageway drainage and cross carriageway culvert installations were also progressed in recent months along the alignment of the old A9.
With the bulk of the works to the structures completed earlier in 2020, some finishing works were carried out in the period, including waterproofing of some of the bridge decks. Waterproofing and backfilling also continued on the BEBO arch structure which forms the new Ordie Burn overbridge to the West of Newmill Farm.
Landscaping has also continued throughout Autumn with new planting areas being completed on the large eastern cut slopes between Bankfoot and the new Stanley/Tullybelton Junction.
The construction site remained closed, to ensure the safety of the workforce, due to the Coronavirus Pandemic throughout late Spring and into early Summer 2020. During this time, our contractor Balfour Beatty, provided a skeleton team to oversee essential services such as site safety and security, and to monitor the traffic management to ensure the safe operation of the A9.
By early June 2020, our contractor was able to proceed with planning and pre-start preparations on site, following the Scottish Government’s up-date to the construction sector guidance. This enabled the project team to undertake works to site offices and welfare facilities in preparation for construction restarting.
These preparatory works involved significant alterations to the site offices and welfare facilities to comply with Scottish Government guidelines on hygiene and physical distancing, and the development of a robust series of new operating procedures to monitor and control every aspect of the working day to keep site staff safe.
The project team welcomed the news that work could gradually recommence on site from 22nd June 2020, and with the new operating procedures firmly in place, construction began the very next day. Works commenced on plaNning out the existing carriageway surface between Luncarty North and South Junctions and new surfacing operations got underway at the northern end of the project, between the new Coltrannie overbridge and Bankfoot North Junction.
A new access track adjacent to the Pitlandie overbridge near Luncarty was completed and permanent fencing was erected at this location to de-lineate the highway boundary and keep animals away from the road corridor.
The structures team restarted works to the wing walls at Pitlandie and Coltrannie overbridges and poured concrete for the retaining wall at the Ordie burn culvert on the east of the A9 and south of Luncarty North Junction.
The earthworks teams prepared the foundation layer of approximately 4km of new southbound carriageway between Pitlandie overbridge and Bankfoot South Junction, with sub-base material also being laid in preparation for road construction. The slip roads on the new Stanley/Tullybelton Junction also began to take shape to the east of the A9 carriageway.
The project team took advantage of favourable weather conditions over the summer months to progress the surfacing of the A9 southbound carriageway. Significant progress was clearly visible to road users on the adjacent carriageway, as the new southbound carriageway extended over the top of the new Hunter’s Lodge underbridge extension at Bankfoot North Junction. Road users will soon see the completion of the entire southbound carriageway, with the exception of a short section around the Luncarty North Junction, required to maintain temporary access onto the A9 from Luncarty and Stanley.
Work continued to progress the construction of the slip roads at the new Stanley/Tullybelton Junction and the Luncarty Link Road in anticipation of them opening to traffic for the first time in Autumn when the U38 Stanley Road will also re-open to traffic.
The project achieved an important construction milestone at the end of August as the traffic management team worked through the night to transfer traffic onto a new 3km section of the southbound carriageway from Gelly to Bankfoot North Junction. This key stage in the construction programme enabled work to begin on the existing carriageway, which will be removed and reconstructed to form the new northbound dual carriageway.
Work continued on the construction of the BEBO™ arch structure on the U32 over Ordie Burn which will replace the old stone bridge to the west of Newmill Farm.
The pre-cast concrete arch structure was completed and earthworks operations to backfill the area and create the approach embankments around the bridge commenced. The image below shows the impressive structure of the arch prior to it being covered with earth.
Spring 2020 will be remembered for decades to come – when 'normal' life stopped to fight the spread of the coronavirus global pandemic.
Following the Scottish Government announcement at the end of March, our contractor Balfour Beatty implemented a managed shutdown of the site, in line with the Government guidelines including physical distancing.
The safe and secure shutdown of the site ensured that partially built structures and operations were made safe, associated equipment and plant were properly stored and security measures were put in place at site compounds for the duration of the site closure.
During this time only essential services were permitted, such as monitoring the traffic management to ensure the ongoing safe operation of the A9 as a key part of the national trunk road network.
Despite the interruption to this major infrastructure project, significant progress had been achieved by mid-March when the final sets of beams were lifted into placed at Bankfoot North Junction. These beams completed the extension to Hunters Lodge underbridge to accommodate the new A9 southbound carriageway.
Following the successful traffic switch at the southern end of the project in February 2020, the roadworks focus then shifted to the northern section, with 3,500m3 (8,000 tonnes) of Cement Bound Granular Material (CBGM) laid as the base of the new road, and more than 1,600m3 (4,300 tonnes) of new surfacing placed to create more than 1km of the new A9 southbound carriageway.
Drainage operations continued to progress between the Stanley/Tullybelton junction and Bankfoot, with the excavated material from the creation of drainage channels being reused as fill elsewhere on site. This sustainable method of working has resulted in 99.9% of the materials required for the likes of earthworks operations, being recycled and re-used on site as of the end of March.
Similarly, Balfour Beatty’s initiative to locate a borrow pit on site at Newmill Farm has dramatically reduced the number of vehicle movements on the road network that would have been necessary to transport thousands of tonnes of materials including gravel and sand to site. This has resulted in a more environmentally sustainable method of constructing major infrastructure of this scale. The excavated materials from the borrow pit have been used to construct the road embankments around the Stanley/Tullybelton Junction.
Works on the structures progressed well with concrete for the bridge decks being poured at several structures. With all the concrete beams now installed as planned on the project, completing the bridge decks will allow our contractor to begin to undertake waterproofing and surfacing, in preparation for them opening to traffic.
Preparatory works also began on the new Ordie Burn underbridge which will replace the existing stone bridge to the west of the A9 near Newmill Farm and the new Stanley/Tullybelton Junction, with a BEBO Arch bridge. This unusual structure, will comprise 50 precast concrete sections, to form an arched bridge over the Ordie Burn.
An example of a BEBO® Arch constructed over Limpet Burn as part of the Aberdeen Western Peripheral Route
Despite adverse weather creating challenging working conditions in February, bridge beam lifting operations at Gelly overbridge were successfully completed during two overnight closures of the A9 on 18 and 19 February, rather than the three nights originally planned. The project team were able to carry out the finishing works to the beam lift operation on the third night under temporary traffic lights, which minimised disruption to road users allowing the road to remain open overnight on the 20 February.
In addition, the project achieved a significant milestone during February with traffic being switched on to the new section of northbound carriageway at Luncarty Junction for approximately 2.4km. The focus will now shift to the new southbound carriageway at the northern end of the project.
During Winter 2019/20, the project team have been busy laying cement bound granular material (CBGM) as the base of the new southbound carriageway.
Work also continued on the installation of the drainage network, tying in new road drainage to the network of Sustainable Drainage System Ponds (SuDS) that have been constructed throughout the project, some of which are now visible to passing road users.
Earth moving operations continued at Bankfoot North Junction during January and February with some 27,000m3 of earth placed in the vicinity of the new Hunters Lodge Underbridge extension. This material is being excavated from other areas within the site to fill the area surrounding the structure.
The construction of the concrete bridge decks at the Pitlandie and Coltrannie overbridges, following their beam installation in late 2019, has also progressed within the period. The concrete deck at the new Stanley/Tullybelton overbridge was completed allowing site traffic to transport material over the A9 without affecting road users.
Landscaping works also got underway and road users and residents will have noticed that several hundred trees have now been planted on the verges and slopes adjacent to the newly constructed carriageway.
During Autumn 2019, the project moved into another exciting phase with the first layers of the new road being laid at the southern section of the site, between the Luncarty and Stanley junctions. Road users can now see the new northbound carriageway as they travel north of Luncarty.
Once the southern section of the pavement operations are complete, surfacing operations will move to the north of the project to commence forming the new southbound carriageway working south towards Bankfoot.
Culvert extensions and head walls have now been completed including two large culverts at the Shochie and Ordie burns. The drainage adjacent to the carriageway was also progressed ahead of the new road construction which includes connections below the existing road. These connections allow the surface water run-off to flow to the SuDS (Sustainable Drainage Systems) ponds. In addition to the drainage, kerbing for the new carriageway has also commenced and road users will see this in place at the new carriageway north of Luncarty and also at the north end of the site, ahead of the new road being laid.
Earthworks for the project this period focused on embankment construction at the new Stanley/Tullybelton junction. The structures were also backfilled as the construction of the concrete supports and decks progressed.
The Tullybelton overbridge deck is now complete and now that the temporary supports above the carriageway have been removed, the final profile of the bridge deck is now visible to road users.
Good progress was made on two more structures, with the successful installation of precast concrete beams at both Pitlandie and Coltrannie overbridges during full overnight closures of the A9 at the end of November. These two important structures will provide new safer access for residents and farmers who live and work adjacent to the A9. These new accesses will also allow the existing accesses off the A9 to be closed to help improve road safety along this section of the A9. See a timelapse video of the beams being installed.
During the overnight closures works at drainage crossings and general maintenance of the traffic management were also undertaken along with refreshing temporary white lines at junctions throughout the site.
The earthworks stage of the project continued throughout Summer 2019 with the majority of earthworks to the south of the new Stanley/Tullybelton junction nearing completion.
North of the Stanley/Tullybelton junction, earthworks continued with the excavated material from Bankfoot being used as fill material for the construction of the Tullybelton East junction. The earthworks around this structure included the shaping of the approach embankments on either side of the junction which will form the new slip roads to tie into the existing Stanley road. In total, approximately 610,000 m3 of material had been excavated by the end of August 2019, enough to fill 244 Olympic size swimming pools.
The traffic management for the site underwent a change in June 2019 as a temporary mini-roundabout was installed south of Bankfoot. The temporary mini-roundabout helps to manage the safe flow of traffic during construction of the new A9 dual carriageway.
The temporary roundabout allows site vehicles direct access from the A9 to the quarry located at Loak Farm which provides the materials essential for the construction of the project and reduces the volume of construction vehicles on the local road network, which would otherwise need to come from quarries further afield.
Carriageway drainage on the southern end of the project commenced in July which involved laying pipes along the length of the new carriageway. Drainage is a key part of any road network as it allows surface water to run off the new carriageway to designated collection basins, ensuring the safe operation of the road for road users.
Works continued at Shochie and Ordie Burns to extend these culverts to allow for the wider A9 dual carriageway.
The project reached a significant milestone at the end of July following three overnight closures of the A9 to allow the installation of bridge beams to construct the new Stanley/Tullybelton junction. A total of 15 beams weighing 765 tonnes - the equivalent of 60 double decker buses – were installed to form the new structure over the carriageway. During the month of August, work began on the construction of the deck of this structure.
Construction of the concrete columns at Pitlandie, Coltrannie and Gelly overbridges progressed during August.
At Bankfoot North Junction, works to extend Hunters Lodge underpass progressed with the southern abutment cast.
The steep embankment at Broompark was cut to make way for the new dual carriageway. Soil nails were used to stabilise the steepened slope. Soil nailing involves drilling holes into the slope and fixing long steel bars into the holes with grout.
Further north of Bankfoot, site clearance and boundary fencing works continued, with earthworks commencing in the area to prepare for the construction of the two new overbridges at Coltrannie and Gelly.
The traffic management to the south of Luncarty junction was altered at the end of August to allow the first 2.4km of new carriageway to be constructed and tied into the existing dual carriageway. In advance of the new carriageway being constructed, drainage and foundation layers for the road were completed in preparation for the Cement Bound Granular Material (CBGM) being laid on this stretch.
The CBGM material is produced at the onsite batching plant adjacent to the project office at Loak Farm, along with some of the raw materials for the concrete and road pavement.
Since the construction contract was awarded in September 2018, preparatory works including design, and construction works have progressed well during the initial months to June 2019. The project moved into the earthworks phase, where approximately 700,000m3 of earth is expected to be moved during summer 2019 season. That equates to approximately 280 Olympic sized swimming pools! The earthworks form the foundation of what will become the new widened A9.
The design of the dual carriageway has continued to progress, with more than 100 design packages delivered. Design packages are made up of many drawings and specifications which detail how each individual element of the project will be constructed.
To reach this crucial stage, our contractor consulted widely with a range of key stakeholders including Perth and Kinross Council, BEAR Scotland, Scottish Natural Heritage (SNH) and Scottish Environment Protection Agency (SEPA), to ensure that the needs of our stakeholders have been considered and included during design development.
Construction activity increased during the period and road users will have noticed a significant step-up in activity. This included:
- The new Stanley/Tullybelton Junction begun to take shape with hundreds of tonnes of earthworks placed to create the verges on both the east and west sides of the new A9. The overbridge also began to take shape in May, with both abutments formed and column construction underway ready for the pre-cast concrete beams to be lifted into place during overnight closures of the A9 in late July.
- Site clearance and boundary fencing works were nearing completion in all key areas of the site.
- Culvert extensions north of Bankfoot (which allow water to flow under the road) were completed to facilitate the widening of the A9.
- Public utility diversions such as BT cables were also well progressed.
- The temporary Bailey bridges installed earlier in the year crossing the Shochie an Ordie Burns became operational in April 2019. These Bailey bridges enabled our contractor to move tonnes of material to areas where fill is required, without having to use the existing A9. This has dramatically reduced the number of site vehicles using the A9, minimising delays to road users.
- To the north of Bankfoot, soil nailing works commenced on a slope in early May to retain the ground adjacent to a private property.
- At the northern extent of the project, construction also commenced at both Coltrannie and Gelly overbridges.