Greymouth WWTP, West Coast

Date: January – June 2013

Client: Grey District Council

Consultant: MWH

Main Contractor: Hawkins Infrastructure

PT Subcontractor: BBR Contech

The Grey District Council’s new wastewater treatment plant in Greymouth is designed to receive, treat and manage wastewater from Greymouth, Cobden, Karoro and surrounding areas.

As part of this upgrade a new Biological Trickling Filter tank was constructed by Hawkins Infrastructure being 27 metres diameter. BBR Contech were subcontracted for the post-tensioning of horizontal tendons in wall panels being 11 rings of 5 strands stressed through four pilaster panels.

BBR Contech supplied the Drossbach duct and the BBR CMI anchorages to the precaster then installed, stressed and grouted the tendons.