HEB Construction Ltd and Auckland Council have worked together to improve the drainage network in the Takanini area by constructing a new box culvert from 91 Grove Road to McLennan Park Pond to help drain the land more easily.


The project encompassed the construction of an in-situ reinforced concrete box culvert 3.5m x 2.5m in cross-section and 420 metres long in challenging peat ground conditions.


The culvert was constructed in a sheet piled trench via a cut and cover approach with the base of the excavation ranging between 5 metres and 8 metres below ground level.


The scope also included the construction of inlet and outlet structures, road crossing and an outlet channel into the existing McLennan Park Pond with both hard and soft landscaping.