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As part of our Cyclone Recovery Response efforts, we identified and programmed 12 cyclone-damaged sites for simple repair work. All of these were completed during the first half of 2024 and were fully funded by NZ Transport Agency Waka Kotahi.
Our simple roading repairs included medium-sized structural projects that required minimal engineering design and construction work, costing less than $200,000 per site. The cyclone-damaged sites were low risk to repair and involved installing small or simple retaining walls, culvert replacement and landslides. Those simple repairs did not require resource consent to complete and limited geotechnical input.
Crews built a 2 metre x 76 metre retaining wall to repair the landslide and installed an earth bund to prevent water flow over the slope.
Crews repaired the broken culvert that triggered a landslide and filled in the slope, using rock armouring to hardfill the drainage channel beneath the culvert.
Crews constructed an MSE wall to repair the landslide and loss of carriageway, and installed an earth bund to prevent water flow over the face of the slip.
A 40-metre MSE wall was constructed to repair this medium-sized landslide, caused by poor drainage, and an earth bund installed to capture surface water to a new sump.
An 18-metre MSE wall was constructed to repair this landslide and MacMat was installed to prevent erosion.
Crews repaired a large undercut extending to the carriageway by building a 45-metre MSE wall with Terramesh across rock face.
Poor drainage triggered slope instability and the loss of one road lane. Crews installed an 8.5-metre MSE wall and cleared the adjacent culvert.
The first simple landslide repaired in early 2024, crews built a 20-metre MSE retaining wall with Terramesh face across gabion rock.
To repair the slipped road edge and restore two-lane access, crews built a 16-metre MSE wall with Terramesh face across gabion rock and installed an earth bund to capture surface water to a new sump.
Crews repaired the landslide with an 8 metre MSE Wall and made improvements to the culvert that will protect the site against future erosion.
Crews fixed this downhill landslide by building a 6-metre MSE wall with Terramesh face across gabion rock and replacing the existing culvert.
Crews repaired the landslide by constructing a 15 metre x 1.8 metre MSE retaining wall and reinstated the road above.
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