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Cobar Reticulation Replacement

Cobar Reticulation Replacement

Client: Cootamundra-Gundagai Regional Council

Asset Owners: CGRC & Goldenfields Water

Project description

Cootamundra has endured water quality problems with the old cast and ductile pipes being well beyond their use by date. Not only were there issues with discoloured water, pipe burst events also caused disruption to supply for the local community.

Killard Infrastructure was engaged to undertake the water main replacement project. This included the alignment selection and construct of 20km of water main infrastructure through conventional open cut and lay and trenchless HDD under boring, slip lining methods of renewal over a 24 week delivery program for stage 1.

The project funding was sourced from the Stronger Communities Fund, an initiative of the NSW Government and administered by Cootamundra-Gundagai Regional Council.

Plant type

5-13t Excavators, Non Destructive Digging trucks, Combination Vacuum truck, skid steer.

Pipe size & length

19.6 km of water main construction. Pipe size ranging from DN100 to DN250. Pipe material OPVC.

Project was completed in 4 phases
  • Phase 1- 10,428 m
  • Phase 2- 2,507 m
  • Phase 3- 6,685 m
  • House service transfers
Design and build dates

Oct 2018- Mar 2020

Project value

$6.3 million

Roles and responsibilities

Killard – Construct water pipeline

Stakeholder liaison

By Project Management Personnel

Safety and environment

Safety incidents – nil

Environmental incidents – nil

Client referees

Mr. Bill Moore

Cootamundra Gundagai Regional Council


This project demonstrates our ability to successfully deliver water main replacement projects.

Innovative solutions included HDD beneath Muttama Creek and the railway line. Grundomat for soil displacement & pipe pulling beneath residential driveways (a no dig solution).

Furthermore, complex coring of a reservoir and associated pipe and pit work meant a successful balance and transition connection between Council and Goldenfields Water assets.

Our experience and efficiency meant a high level of stakeholder engagement and good collaboration with both Council and GWCC to achieve project timelines.

Project Info