Waiouru Wastewater Treatment Plant Upgrade

New Zealand Defence Force
Pattle Delamore Partners

Project Scope

This project took place whilst the plant continued to operate 24-7, without holdup.

Works included the construction of.

  • Reinforced concrete twin SBR tank system with sludge pumps, decants, diffusers, Mixers and valves.

  • SBR Feed and Trickling Filter recirculation pumpstations and new splitter manhole.

  • Two MCC rooms and three boards

  • Generator Site

  • UV Pit and new UV unit

  • Flow meter chambers

  • Blower room

  • Access roading to the site

And the refurbishment or upgrade of

  • Primary and secondary clarifiers

  • Trickling filters

  • Sludge digester & drying beds (to geobag sites)

  • Electrical works throughout the entire plant


  • The use of DOKA formwork to construct the reinforced concrete tank insitu to speed up the construction process

  • Re-using all of the existing plant arms and structures to save on costs

  • Rebuilding the Trickling Filter arms like for like as an unpowered item

  • Removal of the existing unsafe Digester lid and replace with a new more easily accessible lid.