Wastewater

Army Bay Ocean Outfall Replacement

The longest pipeline drive ever installed with the Direct Pipe system at the time of completion.

Trenchless design and construction management for a record-setting outfall replacement.

A single unbroken drive from landfall to the diffuser head pushed Direct Pipe technology to a new limit, avoiding dredging entirely.

Scope of work

  • Trenchless Engineering
  • Pipeline Engineering
  • Construction Management
Army Bay Ocean Outfall Replacement — Auckland, New Zealand
Army Bay Ocean Outfall Replacement, Auckland, New Zealand. Hoffman Tunnels provided tunnel and underground design, engineering and construction-phase support.

Project facts

Record
Longest Direct Pipe
Dredging
Avoided
System
Outfall
Completion
2019
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