The carpark suffers from major cracking and lifting of the surfacing, due to poor ground water drainage which has weakened the subgrade. Ground water needs diverting or stormwater management as part of extending the longevity of the new assets. The carpark design requires a long-term asset improvement not just a repair. The design needs to allow for differential heights, water surface run off, working within confined area, and approvals from the Heritage NZ.
The existing concrete retaining wall has been structurally analysed to be a high risk to the car parking works, therefore, to be counted as part of the carparking package of works.
January 2024 - To manage the uncovered natural hydrology of the site, a beefed-up drainage system has been installed along with a strengthened retaining shotcrete wall. The first concrete pour has been completed with the second stage finishing 13th December 2023. The plan is to have the carpark saw cuts, road markings and carpark stops completed by the end of 15th December 2023.