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As part of our Cyclone Recovery Response efforts, we identified and programmed 13 cyclone-damaged sites for complex repair work. All of these were completed during the first half of 2024 and were fully funded by NZ Transport Agency Waka Kotahi.
Our complex roading repairs required significant planning, investigation and design work and cost in excess of $200,000 per site to complete. The work involved major structural repairs to landslides, river protection work and bridge armouring, with some sites requiring resource consent and community engagement on best design solutions.
Of the district's 116 cyclone-damaged sites requiring complex repairs, 34 have received funding to restore to pre-cyclone levels of service. We continue to advocate for more government funding to restore a roading network our community can rely on.
This bridge was washed out entirely and required a complete bridge rebuild. The six-month construction rebuild project involved rock armouring around the structure to protect against future erosion.
After the cyclone washed out the bridge's left abutment, the bridge was cut off from road approach. A new extension was required to close the gap and rock armouring installed to protect from future erosion.
Repairs to a landslip at the bridge's base involved placing Enkamat over 100 mm of topsoil before grass seeding on the true left abutment. This will protect the structure from future erosion and possible bridge failure.
Trees were cleared and significant scour to the bank beneath the bridge repaired with the placement of Enkamat over 100 mm of topsoil and then grass seeding.
Scour and slips around the bridge's abutment and piles were repaired by planting 800 metres of flax and sedge to reduce the risk of erosion and assist with sediment control.
Crews cleared flood debris caught upstream of the bridge and repaired resulting scour using Rip Rap rock revetment either side of the bridge and Enkamat on the bridge’s berm.
Crews used limestone rock Rip Rap to repair significant scouring to the bridge's piers, and shaped and covered the bank with Enkamat, topsoil and grass seed to help prevent erosion and assist with sediment control.
Crews installed three metres of soil-anchored sheet pile wall and a concrete wall to repair the bridge's abutment, and reinstated the pavement and new guardrail.
To repair the severe erosion to its true left abutment, crews jacked the bridge to level and reinstated the existing retaining wall. They also completed rock protection works and increased the height of the gabion wall next to the river.
Crews repaired damaged drainage that caused the landslide and installed a 1.2 metre diameter culvert and new rock bag drop structure. They also carried out trenching at the site and reinstated the gabion wall to protect against future erosion or possible slips.
To repair the landslide and restore two-lane access to the road, crews cut back into the hill side to achieve a 30-metre retreat and constructed 200 metres of new road. A 0.9-metre diameter culvert was installed to protect the site against future flood damage and erosion.
Significant scour damaged the base of 10 of the bridge's 23 piers. Crews used rock bags to repair the scour damage and reduce the likelihood further degradation.
An over slip resulted in the surface of the road being pushed up by the landslide, subsequently reducing the traffic to one lane.
The effects of Cyclone Gabrielle caused the road and true right abutment at Fletchers Crossing to be washed out, resulting in a complete road closure until repairs can be made. The bridge will remain closed until the most resilient solution for the bridge can be determined.
An under slip and over slip at this site caused significant damage to the road surface and left it uneven, reducing the roading corridor to one lane. A priority give way will remain in place until the most resilient solution for the road can be determined.
Severe river scouring to the road occurred at this site, reducing the roading corridor to one lane and restricting the line of site around the corner. Traffic lights are currently in place until the most resilient solution for the road can be determined.
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