Otahuhu East Branch Sewer

Location: Auckland, New Zealand

Value: $1M +

Completed: 2011

Description

The project involved the installation by directional drilling of a twin siphon (250OD & 200OD HDPE) pipelines under the Tamaki Estuary, construction by microtunnelling of a 300NB pipeline and associated precast and insitu concrete chambers.

A new pipe bridge spanning 60m across the Tamaki Estuary required construction of a temporary working platform across the mangroves to provide access for piling rigs and pipe installation.

Expertise

• Insitu concrete chamber construction
• directional drilling (siphon)
• microtunnelling
• HDPE welding
• piling
• drainage