Ports Authority general manager Nooroa Tou said they were unable to confirm the size of the rupture until the fuel company’s specialist welders arrived to assess the damaged pipeline.
It was also too early to confirm who was to blame.
After repairs were completed, Pacific Energy said they would run a pressure test while the pipeline was empty.
The digging works have proven difficult due to several infrastructure services such as the water, electricity and telecommunication lines, running parallel above the underground fuel pipeline.
Safety measures will remain in place from the excavation barricaded area, oil spill boom equipment and the installation of additional road hazard lights until the pipeline repairs completed.
The reduced traffic lane will function during the hours from 8am to 5pm Monday to Saturday until the damaged pipeline is repaired.