Frequently Asked Questions - processes
The infrastructure rebuild will restore horizontal infrastructure throughout Christchurch.
SCIRT has prioritised the repair of retaining walls that have impacts on roads, underground services, such as wastewater and water supply, or have a risk of failure that could cause public safety or access issues. Nearby residents and property owners will be advised well in advance of any work to rebuild a wall. You can also keep an eye on the SCIRT website for SCIRT’s schedule of works, which will set out the broad timeframes for the rebuilding of infrastructure throughout the city.
Each wall is unique and construction times will vary depending on a number of factors such as access to the site, ground conditions, the height of the wall and services behind the wall e.g. water, wastewater, utilities. Some complex walls may take up to one year to rebuild, while others will be finished in a few months.
It is important that SCIRT consistently follows the prioritisation process put in place for the rebuild as this is in the best interests of the people of Christchurch. If a wall is deteriorating and poses a safety risk, please contact Christchurch City Council who will organise for temporary stabilisation until the permanent repair can occur.
Higher priority will be given to those walls that pose risk to public safety, access, protection of services and properties.
If the wall is deteriorating and poses a safety risk, please contact Christchurch City Council who will organise for temporary stabilisation under its maintenance contracts until the permanent repair can occur.
To undertake the design of the wall SCIRT first needs to determine the ground conditions around and beneath the proposed wall through geotechnical investigations. These investigations along with information on the location and condition of adjacent services are used to determine the extent of the design and possible rebuild solutions.
The construction methodology for repairing the retaining wall requires us to build the retaining wall from the bottom up along the entire length of the wall, so all easements must be in place.
This will be influenced by the length of time it takes to secure all the necessary agreements. We have allowed approximately 2 months for this to occur. If it takes substantially longer to gain the necessary easements, construction may be delayed due to work crews and resources being diverted to other high priority projects.
Each wall is unique and construction times will vary depending on a number of factors such as access to the site, ground conditions, the height of the wall, services behind the wall e.g. water, wastewater, utilities. Some walls may take close to one year to rebuild, while others will be finished in a few months.
If you know when the rebuild of your property is scheduled for, please let us know when we move into your area to rebuild a retaining wall. We will try to accommodate your construction works as much as we can.
Fixing a broken piece of infrastructure (an asset) is an important task that involves a number of key steps. First the asset is identified, surveyed, and the damage assessed. Then, the rebuild works are prioritised with priority given to fixing the worst damaged areas that affect the highest number of people. The rebuild work then enters the design phase, and consultation with the community is undertaken if needed. The rebuild works are then packaged together, and the delivery teams go out and do the physical construction work on site. Once the works are completed the infrastructure is handed over to the asset owner (e.g. Christchurch City Council or NZTA).