FAQs
Project Overview
- What work is being carried out?
The existing 450mm pipe culvert is being upgraded to a 2.5 x 1m box culvert to reduce flood risk and to improve drainage.
- Why is this work necessary?
The limited capacity in the existing culvert is not sufficient, contributing to flooding and road closures. The upgrade will mean more water can flow through the culvert, reducing flooding for major storm events.
- What size will the new culvert be?
Approximately 2.5m wide by 1m high and will be in place around 2.5m below road level.
- Will water, power or telecommunications services be affected?
No. There are no expected impacts to any other services.
Timing and length of works
- Why does the work take several weeks?
The works involve large-scale excavation, installation, and reinstatement, requiring specialised equipment and sequencing. Favourable weather conditions may allow work to be completed quicker allowing the road to reopen earlier.
- Why is it being done now?
Timing balances weather conditions, flood risk, and minimising disruption to agricultural and road users. There is no ideal period that avoids all impacts. Additionally, the sooner this work is completed then the sooner the benefits of reduced flooding risk can be realized.
- Why was the start date changed?
The programme was initially adjusted to allow for additional communication and align with school holidays to reduce disruption. The more recent delay is the result of recent inclement weather.
- What will the working hours be?
Typically work will run from 7.30am-5.30pm Monday to Friday with occasional extended hours if required.
Traffic and Access
- What are the traffic impacts?
There will be a road closure between Goulds Road and East Maddisons Road with detours via Goulds Road and Ellesmere Junction Road.
- Will property access be maintained?
Yes, access for residents will be maintained during the works.
Construction Approach
- What will happen to the existing culvert?
The existing culvert will remain.
- Why is a full road closure required?
Due to the depth and size of excavation and limited road width, maintaining traffic is unsafe and not practicable. Full closure reduces duration and improves safety.
- Were alternative construction options considered?
Yes. Staged construction, temporary roads, and traffic management options were assessed but were not feasible due to safety constraints, ground conditions, site geometry, and overhead services. Options to maintain one traffic lane are impractical, photos above show the scale of similar work recently completed, highlighting the need for a road closure.
Community and stakeholders
- Have schools and bus services been consulted?
Yes. The project team has engaged with schools and bus operators to coordinate arrangements and minimise disruption.
- How has community feedback influenced the project?
Feedback has resulted in a deferring the start date to reduce disruption and allow additional stakeholder engagement.
Construction Impacts
- What activities will occur?
Excavation, culvert installation, and road reconstruction using heavy machinery (see above photos).
- Will there be noise or disruption?
Yes, during working hours, with efforts made to minimise impacts.
- Will services be affected?
No expected impacts to water, power, or telecommunications.
Future Works
- Will other culverts be upgraded?
Further upgrades may be considered as part of wider network planning, subject to assessment and funding.
General
- What are the working hours?
Typically, 7.30am to 5.30pm Monday to Friday, with some extended hours.
Contact
- Who should I contact if I have questions?
Residents can contact the contractor or Selwyn District Council using project contact details.