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Main Road - Scott Park to McCormacks Bay - Sumner - Replacement of damaged culverts - construction of a new seawall - road reconstruction and three laning - as well as installation of this section of the Coastal Pathway

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Two-way traffic and cycle lanes will be maintained | In construction November 2013 – mid 2015.

In this notice:

Where we are working

Map. Sourced from LINZ data, Crown Copyright reserved. SCIRT work area (red): Main Road eastwards from Scott Park and through the intersection with Mt Pleasant Road; Ferrymead Bridge project: Council and HEB Construction (bright green): Main Road (between Scott Park and the western end of the Ferrymead Bridge, including through the intersection with St Andrews Hill Road).

What we are doing

Main Road between the end of the Ferrymead Bridge project and McCormacks Bay Road will rebuilt to include a second city-bound lane; The earthquake damaged stormwater culverts under Main Road will be replaced and extended; The earthquake damaged seawall will be replaced. This will be rebuilt further into the estuary which will allow the carriageway to be reconstructed wider; The 4 metre wide Coastal Pathway will be constructed between Scott Park and McCormacks Bay to meet up with the section over the causeway; Sections of earthquake damaged wastewater pipes will be repaired and/or replaced and a new wastewater lift station installed.

About this project

The section of Main Road between Scott Park and McCormacks Bay Road suffered significant damage to the road and seawall in the earthquakes.

SCIRT will undertake a full replacement of the existing seawall and reconstruction of the road along the length of this project. Together with the reconstruction of the road, the seawall will be raised to repair the vertical alignment and carriageway width will be extended to include the Coastal Pathway.

To minimise cost and disruption to the community, Fulton Hogan, as part of SCIRT, will carry out the earthquake repairs together with the planned Council's Main Road three laning project. SCIRT works will include the addition of a second city-bound lane on Main Road from the intersection of McCormacks Bay Road through to the Ferrymead Bridge project as well as the planned improvements to intersections, cycle, pedestrian and public transport facilities.

The Main Road three laning project was included in the Council's 2011/2012 Annual Plan and extensive community consultation was carried out by the Council in November/December 2010 at which time changes were made to the plan in response to the community feedback.

SCIRT's project will also include the construction of this section of the 4 metre wide Coastal Pathway.

This project has been timed to coincide with the Ferrymead Bridge reconstruction and with the completion of the Main Road causeway reconstruction. These essential projects will have the potential to cause frustration for drivers and residents and your patience is requested. The end result will be well worth the wait.

Where we are working

Map. Sourced from LINZ data, Crown Copyright reserved. Road reconstruction and/or intersection improvements (light blue): Main Road (between Scott Park and McCormacks Bay Road, including inetrsections with Mt Pleasant Road and The Brae); Seawall reconstruction (dark blue): the estuary side of Main Road (between McCormacks Bay Road towards Ferrymead); Culvert repairs/replacement (black): four locations on Main Road, including near Scott Park, near The Brae, near Mt Pleasant Road, and a location between Scott Park and The Brae; Wastewater repairs/replacement (red line segments): along Main Road (one between Scott Park and The Brae, and another near Mt Pleasant Road); Lift station (red disc): a location on Main Road between Scott Park and The Brae.

Seawall reconstruction

  • The new seawall will be constructed from Scott Park towards the causeway.
  • Two lanes of traffic will be maintained on Main Road by shifting the traffic lanes towards Mt Pleasant when the seawall is being built.
Constructing the new seawall on the causeway.

The seawall

Cross-section of the seawall with Estuary of the Heathcote and Avon Rivers / Ihutai to the left. Three layers: Under layer, Geotextile (fabric) layer, and Cover layer. Then on top of compacted aggregate are from left-to-right Coastal pathway, Cycle lane, 3 traffic lanes, cycle lane. Then to the right is Footpath. the right-hand direction is towards Mt Pleasant. Please note: This drawing is for illustration purposes only.

Culvert and wastewater pipes repairs

Replacing pipes on McCormacks Bay Road.
  • Earthquake damaged stormwater culverts will be replaced with new plastic pipes. Undamaged culverts will be extended to align with the new seawall.
  • Damaged sections of wastewater pipes will be replaced and a new wastewater lift station will be built near Scott Park.
  • As the culverts and the wastewater pipes run under the width of the road, this work will be carried out in night shifts to minimise the impact on traffic.

Road reconstruction and resurfacing

  • Following the completion of areas of the seawall and pipe work the road will be constructed on the seawall side. The base layer of the road seal will be applied.
  • Two lanes of traffic will be then diverted onto Estuary side of the road, while the road on the Mt Pleasant side is reconstructed.
  • An asphalt top layer will be applied.
Grading the road on the causeway.

Traffic Impact

Vehicle access:
Main Road will be open to two-way with lane shifts and lane width reductions throughout the construction period. There will be a 30km/h speed limit in place, which will cause some delays. Please allow extra time for your journeys.
Pedestrian/cyclist access:
Separate cycleways will be maintained in both directions along Main Road. A safe walkway will be maintained for pedestrians.
Water users:
It will not be safe for waterway recreationalists near the culverts and along the seawall while we are working in this area. For your own safety please keep well away from the work sites.

During this and other rebuild work we encourage you to help keep Christchurch moving by:

  • Allow extra time for your journey to account for the temporary speed reduction
  • Combine activities in one trip
  • Walk or cycle for shorter trips
  • Use the bus visit or phone 366 88 55 for more information.

General Information

Night works will be required as part of this project.

Please contact Fulton Hogan on 0800 277 3434 if you have planned works on your property or any specific access requirements that we need to consider e.g. nurse/doctor visits, Meals on Wheels.

There will be increased noise, dust and vibration levels associated with this work.

To enable us to carry out wastewater repair work we may need to have over-pumping and dewatering pumps in certain areas, close to the work site. Pumps need to run 24 hours a day if required and will cause low volume noise for nearby residents.

Works will have no planned impact on current power, telecommunication, water or gas services. However, the network is still fragile so please be prepared in case there is an unexpected service cut off.

Safety is our number one priority. Safety is your responsibility too. Stay clear and stay alert—keep children and pets at a safe distance from the work site.

All works are subject to favourable weather and on-site construction conditions.

Updates about this project will be distributed throughout the year. If you would like to receive updates about this project via email sign up by emailing [email protected] with Main Road causeway in the subject line.

Need more information?

Phone: 0800 277 34 34 (8.30am–5.00pm Monday–Friday)
Email: [email protected]
Website: Visit
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Sign up to receive email updates on this project by emailing
[email protected] with Main Road in the subject line.

Main Road renewal plan: Permanent changes to road layout

Plan of Main Road.
Plan of Main Road.

Main Road

  • Main Road will be rebuilt to include a second city-bound lane.
  • The entrance to the Scott Park complex will be relocated approximately 20 metres west to provide more space for the right turn bay into the complex and to provide better visibility for vehicles entering and exiting the site.
  • A flush median will be provided for right turning traffic into Te Awakura Terrace.
  • Raised pedestrian refuges will be installed along Main Road just east of Te Awakura Terrace, and just south of The Brae.


  • Due to the realignment of intersections and paths some existing trees will need to be removed.
  • Landscape planting will be added on completion of the project.

Cross Sections

Sections A, B, and C.
Plan of Main Road at the intersections with Mount Pleasnt Road and McCormacks Bay Road.

Mt Pleasant Road intersection

  • The Mt Pleasant Road intersection will be narrowed and realigned to slow down traffic coming down the hill entering Main Road.
  • The existing give way sign on Mt Pleasant Road intersection will be replaced by a stop sign to improve safety.
  • A raised centre island will be installed on Mt Pleasant Road to reduce the crossing distance for pedestrians.
  • Two short turning lanes on Mt Pleasant Road will provide space for two vehicles to queue to turn either left or right.
  • A short cycle lane will be provided on Mt Pleasant Road turning onto Main Road.

McCormacks Bay intersection

  • The McCormacks Bay Road intersection will be relocated and realigned approximately 80 metres east of the current intersection to provide better separation between McCormacks Bay Road and Mt Pleasant Road.
  • The existing give-way sign on McCormacks Bay Road intersection will be replaced by a stop sign to improve safety for cyclists on Main Road.
  • McCormacks Bay Road traffic turning west onto Main Road will have a new separate lane to turn into—after stopping at the stop sign. A 'no overtaking' yellow line will prevent through-traffic from crossing into the new lane until further downstream.
  • A raised centre island will be installed on McCormacks Bay Road to reduce the crossing distance for pedestrians.
  • Two turning lanes will be provided on McCormacks Bay Road to enable left and right turners to queue independently.
Start date: 
Fri, 01/11/2013
End date: 
Fri, 03/07/2015
Project numbers: