20120709 Tomago 1 WWPS

Project Description

Client:  Hunter Land, on behalf of Hunter Water Corporation & Various Stakeholders
Principal Contractor:  Bolte Civil
Location:  Williamtown, Tomago, Raymond Terrace (NSW)
Date: 2010 – 2014
Value: $20M

GCA were engaged as specialist project managers, responsible for delivery of the investigation, design, and construction of the Williamtown Wastewater Transfer Scheme (WWTS). Key stakeholders included Hunter Water Corporation, Hunter Land (property developer), and Newcastle Airport Limited.

The Williamtown WWTS comprised a new regionally significant municipal sewerage transfer scheme that will receive sewage from existing and future major developments and pump it through to Hunter Water’s Wastewater Treatment Works at Raymond Terrace.

The scheme involved:

  • Two new regional wastewater pumping stations with cast-on site pump wells and supplementary concrete storage structures.
  • 4km of new trunk sewerage pipelines in a variety of materials and installation conditions.
  • Over 40 pipeline valves, drainage structures, and air release structures.
  • Major pipeline crossings including under roads controlled by the NSW Roads and Maritime Services and under environmentally sensitive areas.
  • Extensive Dewatering and Acid Groundwater Management and Treatment
  • Extensive Acid Sulphate Soil Management and treatment
  • Extensive Community and Key Stakeholder Management Consultation

The scheme will initially support the Newcastle Airport, Williamtown RAAF Base extension, Williamtown Aerospace Centre, and the Northbank Enterprise Hub at Tomago, incorporating the Westrac facility. The system was designed and constructed with the vision to support major regional growth in the Williamtown and Tomago areas for many years to come.

GCA's Involvement

As project managers, GCA’s core role was to procure all project elements with the key aim of delivering value for money for all stakeholders. We worked very closely with Hunter Water representatives to ensure

Our key tasks included:

  • Preparation of the brief for design consultants
  • Assessment of consultant tenders
  • Engagement of the design consultant
  • Management of the route options assessment, concept design and detail design
  • Liaison with Hunter Water Corporation’s operations, environment, asset management and property sections
  • Agency and stakeholder consultation including :
    NSW Office of Water
    NSW Department of Environment and Climate Change
    NSW National Parks
    NSW Roads and Traffic Authority Energy Australia
  • Preparation of construction tender and contract documentation
  • Assessment of construction tenders
  • Engagement of the successful Contractor
  • Contract management (Superintendency) throughout Construction phase
  • Resolving requests for information and resolving site issues during construction particularly in very challenging parts of the project site
  • Attaining final completion certificate from Hunter Water Corporation
  • Ongoing management of budget, timeline, and quality throughout the project
  • Ongoing regular status reporting to Hunter Water Corporation