Wellington City Council

Bank Stabilization Works: 13A Koromiko Road, Aro Valley

The bank in front of 13A Koromiko Rd, Aro Valley has slipped due to a combination of water service leaks in 2021 and persistent heavy rainfall during storm events in 2022. The bank is vegetated but is still susceptible to further slipping in future storm events.
Due to its susceptibility to further slipping, there is a risk of undermining the concrete foundation wall supporting 13A Koromiko Road, and also inundation of the pedestrian footpath and road carriageway below the bank. Permanent stabilisation is required to eliminate these risks and provide safe passage for public using Koromiko Road.
WCC seeks to install bank stabilization works in front of 13A Koromiko Road, Aro Valley, whilst also providing concrete underpinning to the dwelling foundation wall at risk of being undermined. The bank stabilizing system is comprised of a geocomposite mesh with erosion control mat behind and soil nails into rock throughout and also a timber pole wall at the base which has timber planking installed down to the rock layer.