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Gore WTP Upgrade - Plant Construction

This tender is using the new split file responses feature on GETS. The agency has indicated that they would like to receive responses separated by price and non price components, please keep this mind when preparing your response for submission via GETS.


Tender Closed
RFx ID : 21762823
Tender Name : Gore WTP Upgrade - Plant Construction
Reference # : GDC2019/01
Open Date : Friday, 11 October 2019 8:00 AM (Pacific/Auckland UTC+13:00)
Close Date  : Wednesday, 18 December 2019 4:00 PM (Pacific/Auckland UTC+13:00)
Tender Type : Request for Tenders (RFT)
Tender Coverage : Sole Agency  [?]
Categories :
  • 83101500 - Water and sewer utilities
  • Southland
Exemption Reason : None
Required Pre-qualifications : None
Contact : Matt Bayliss
027 405 8411
Alternate Physical Delivery Address  : N/A
Alternate Physical Fax Number  : N/A
Agency Address :

The Gore District Council is consolidating its water treatment sites in Gore from two existing treatment sites to one, being an upgraded water treatment plant (WTP) in Wentworth St in east Gore. Their existing Hilbre Avenue WTP will be decommissioned, retaining only reservoir storage and reticulation pumping on this west Gore site.

As part of this project, the West Gore/Wentworth Street WTP will be upgraded to meet the Drinking Water Standards for New Zealand 2005 (DWSNZ) and the capacity will be increased.
The new WTP will be sized for 6,000 m³/d with provision to expand to 8,000 m³/d in the future.

The Contract Works include the following:
1. Preliminaries and general
2. A new aeration tower and blower, replacing the existing tower.
3. Chlorine dosing equipment, upgrading existing process equipment, and installation in a new drum store.
4. Caustic soda dosing equipment, replacing the existing caustic dosing system.
5. Coagulant dosing equipment, a new dosing and storage system.
6. A flocculation tank and baffles.
7. Media filtration with three filters, constructed in concrete tankage.
8. A concrete backwash water tank.
9. An FRP wastewater buffering tank, to buffer the discharge rate to the sewer.
10. UV disinfection.
11. A new booster pump station, to supply the local high-level reticulation, replacing the existing system.
12. Compressed air supply, supplying instrument air for valve actuation.
13. Process, waste and stormwater pipework.
14. Associated civil and earthworks including access road upgrade.
15. Associated buildings and structures.
16. Electrical, instrumentation and control, including replacing the existing MCC and supplying a road trailer mounted diesel generator.
17. Testing, commissioning.
18. Three-day trial operation and operator training.

The plant has been designed to facilitate additional treatment steps in the future including:
 Polyelectrolyte dosing
 Fluoridation
The scope of this contract includes the construction of concrete water retaining structures, supply and installation of pipework and mechanical equipment, electrical installation supply and installation. The scope includes pre-commissioning of the installed plant.

Alternative tenders will be considered using membrane-based filtration.

Awarded Status

This tender has been awarded.

  • Marshall Industries Limited - 189, Bond St, Invercargill, 9810, NEW ZEALAND
    Value $ 5,275,500

Further Award Information:
The contract has been awarded to Pall Marshall Water Consortium (PMWC) based on their alternative proposal for the sum of $5,275,500 excluding GST and daywork.

Award Date: Wednesday, 15 July 2020 12:27 PM (Pacific/Auckland UTC+12:00)