Construction update

• Progress through MayApril 2017
• Work being undertaken in JuneMay 2017

Progress through MayApril 2017

Early inOn Saturday 1 April, the month, a major project milestone was achieved when the additional 3 ^rdnew southbound laneoff-ramp at Takanini was connected to the motorway by stitching the new and existing bridges over Papakura Stream together with concrete. The off-ramp was opened to motoriststraffic on the 20 April. Following this, the third southbound lane from Hill Road to the Takanini off-ramp; and from the Takanini on-rampwas opened to the Pahurehure Inlet. The lane has improved southbound traffic flow during peak hours. Narrowedon Sunday 23 April. Reduced speed limits and narrowed lanes and a reduced speed limit will remain in place while improvements continue in other areas ofwe complete works between Orams Road and Hill road, along the project.southbound shoulder and at the Takanini Interchange.

 Later in the month, demolition of the Orams Road Bridge was completed when large deck sections were removed. Construction ofclosed to all traffic starting on Saturday 22 April until October 2017. Signposted traffic detour routes are in place along Everglade Drive, Redoubt Road and Great South Road, while the new bridge abutment began withpedestrian and cyclist path can be accessed via the installation of 20 piles that will provide support forPuhinui Stream Bridge underpass (off Everglade Drive from inside the extended bridge structure.

More detail about works completedBelow is a summary of our activities in May include:April.

Orams Road Bridge:to Takanini Interchange:

• The eastern span of Orams Road Bridge was demolished. Concreteclosed and wire saws were used to cut sectionsdemolition of the deck,eastern span commenced. The road surface was removed and a large crane lifted each section onto trucks for site removal.the eastern side of the bridge was excavated by two metres.
• Flat platforms were constructed to improve access for workers to build the new bridge pier. 
• Piling work for the new eastern abutment was completed. Steel pipes and concrete were inserted in 20 pre-drilled holes to form support structures for the bridge foundation.
• South ofRetaining wall and noise wall construction was completed along the Oramssouthbound shoulder from Hill Road to the Takanini Interchange.
• Under the Alfriston Road Bridge, vegetation clearancethe motorway continued to preparebe lowered to increase the areaoverhead clearance height for alarge vehicles. In the median pavements were compacted and asphalting was completed.
• At Fergusson Reserve, soil has been stockpiled and compacted to prepare for construction of the new wetland pond which will help filter motorway run-off.Takanini northbound on-ramp. This work continues through May.
• Sheet piling was completed in the northbound shoulder at Papakura Stream Bridge. Following this, work on the abutments began with steel being placed and concrete poured.

Takanini Interchange

Takanini Interchange to the Papakura Interchange:Pahurehure Inlet:

• Asphalting was completed inIn the southbound shoulder fromshoulder, pavement works are ongoing. Granular layers were compacted between the new Takanini Interchangesouthbound on-ramp through to the Pahurehure Inlet. Lanes were marked and temporary barriers were shifted to allow motorists access to the new additional southbound lane.
• Haul road construction and vegetation clearance continued along the northbound shoulder.
• NoiseRetaining wall installationand noise wall construction continued along the northbound and southbound shoulders from the Pahurehure Inlet to Takanini Interchange.shoulders. This work will continue throughout 2017.
• Pavement works were completed in the median between the Pahurehure bridge and Pahurehure culvert. This work involved compaction of granular materials and asphalt layers. 

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Work being undertaken in JuneMay 2017

Work overThroughout May, the next monthproject will continue to focus on constructing the new abutment, span and deck atadditional third lane southbound from the Orams Road Bridge. The new abutment piles will be capped priorTakanini on-ramp to installing the beams. Once the bridge beams are installed, construction on the new bridge deck will begin.Pahurehure Inlet. This lane is scheduled to open to traffic later this month.

To add an additional northbound lane and lengthenWith safe work zones in place at the northbound on-ramp at Takanini Interchange, six northbound bridgespiling for multiple structures will be constructed. Two bridges will guide traffic acrossbegin to upgrade the overpass over Great South Road,Road and the railway line,northbound on-ramp and Papakura Stream. Piling works will continue and will provide a safe work area for further road construction.off-ramp.

Orams Road Bridge: to Takanini Interchange:

• SubstructureAt Orams Road Bridge, survey work will continue. Installation of steel reinforcement barsbegin and formworkaccess pads will allow a concrete capping beam to be poured on top of the piles.constructed to provide a level surface for heavy machinery. The concreteeastern wall and beams will be poured first inremoved from the mid-section, followed by the north side,bridge and finally the south sideconstruction of the bridge.  new abutment will begin once piling works have been completed.
• When the capping beam has cured, bearing padsWork continues under Alfriston Road Bridge. With permanent asphalt in place, new median barriers will be installed to supportconstructed in late May.
• Along the southbound shoulder, final landscaping and drainage works continue. The motorway side of the noise walls will be painted with a design similar to the existing noise walls at Takanini.
• New median slipform barriers and lighting between Hill Road and the steel beams of the bridge deck which willTakanini Interchange continue to be installed late June.installed.

Takanini Interchange Interchange:

• In the northbound shoulder at Papakura Stream, hollow core concrete beamsPiling pads will be installedconstructed along Great South Road to support heavy machinery working on the bridge decknorthbound and will beginsouthbound sides of the motorway. This is in preparation for piling work to formwiden both sides of the new northbound on-ramp and additional 3 ^rd traffic lane.
• Along the northbound shoulder betweenmotorway over Great South Road and the railway line, sheet piling will be completed. Following sheet piling, soil nailsRoad.
• Piling work will be installedbegin to reinforcesupport the bank prior to the constructionwidening of a retaining wall.the southbound bridge over the rail way.
• InWork begins to construct the eastbound and westbound shoulders along Great South Road, service relocationsupporting abutments of the new Papakura Stream bridge which will beginbecome part of the northbound on-ramp. This includes pouring blinding concrete for each abutment, installing reinforcement steel and formwork to move services deeper underground.shape the concrete which will be poured on each abutment.

Takanini Interchange to the Papakura InterchangePahurehure Inlet:

• Noise wall constructionAsphalting will continue in the northbound shoulder from the Pahurehure Inlet to Takanini Interchange. Inalong the southbound shoulder, permanent guardrails will be installed and the temporary barriers will be removed.shoulder.
• Between the Pahurehure bridge and Pahurehure culvert, southbound motorway trafficVegetation clearance will shift towardscontinue along the median, allowing a safe work zone to be establishednorthbound shoulder in the southbound shoulder. Following the traffic switch, earthworks will commencepreparation for drainage works and noise wall construction, which is also underway in the shoulder to construct the additional southbound lane.some areas.
• At the Pahurehure culvert, a new safe work zone will be established in the median (location shown in pictures below). This will allow crews to begin widening the culvert. The existing median abutment will be demolished and removed before being replaced. 

With the lanes narrowed, there is less time to react to other vehicles and it is important that motorists keep to the 80 km/h speed limit past our work areas. There will be ongoing truck and project vehicle movements accessing the shoulder and the median work sites. Keeping both motorists and our team members as safe as possible is imperative and we need everyone's help to do this.

As always, we will be doing our best to minimise effects of these works on motorists and the community as much as we can. We thank you for your patience as we work to improve journey reliability and safety along the Southern Corridor.

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