The purpose of this project was to increase sewer capacity in the Albany area, through the installation of a new sewer line from Oteha Valley Road, east of State highway 1, through to pump station 18 on Albany highway south of the senior high school.
The first 1000m of the pipeline was installed by pipe jacking method, by both TBM through softer ground conditions, and hand excavation through harder Albany Conglomerate ground conditions.
The remaining 1200m of the pipeline was installed by open cut method in depths of up to 5m, through varying ground conditions of soft clays and harder rock.
Seven shafts were constructed at depths of up to 16m and 16 manholes were installed at depths of up to 16m and diameters of up to 3m.
The project involved working with multiple stakeholders such as Massey University, Auckland Transport, Auckland Council Parks Division, local residents, businesses and other stakeholders.
Despite encountering challenging ground conditions that forced a change in proposed methodology the project was successfully completed.