CON 24/46 - Manapouri Wastewater Treatment Plant (WWTP) - design, construct and operate - priced attributes only for Tenderers

2026-11-03

This tender is now an Extension of Time for the submission of Price Attributes only for Tenderers who have submitted the Non-Priced Attributes on the 6 June 2025 at 4.00pm as per the previous issued NTT no. 5 and NTT no. 9. Price Attributes close on Thursday, 19 June 2025, 4.00pm.Southland District Council (hereinafter“the Principal”), invites proposals to design and install a new Manapouri Wastewater Treatment Plant (WWTP) and all associated civil, building and pond storage worksat the Kepler North Block located at 701 Manapouri Te Anau Highway. The new plant will replace the existing Manapouri wastewater oxidation pond at 65 View Street, Manapouri.The new Manapouri WWTP will receive wastewater influent via a new 8.1km wastewater rising main from Manapouri’s Terminus Pump Station (PS) located on View Street. The Contractor shall provide requiredupgrades to the View Street Wastewater PS to facilitate the pumping of raw sewage to the new Manapouri WWTP site. These upgrades include installing new submersible and booster pumps as well as providingadditional storage at the PS. The construction of the new wastewater rising main will be carried out under a separate contract and be completed prior to commissioning the new Manapouri WWTP.The new Manapouri WWTP will treat raw sewage from Manapouri township and feed treated wastewater into the existing Kepler Sub-surface Drip Irrigation (SDI) scheme for application to land. The Kepler SDIscheme currently receives treated wastewater from the Te Anau WWTP which is irrigated to land via a network of drip emitters over a 28-hectare field. Appropriate treatment of wastewater is required to ensurethe final product from the new Manapouri WWTP achieves a quality appropriate for discharge to the SDI irrigation fields and ensures SDC can meet their discharge consent standards.To limit the impacts on groundwater and soil quality and minimise nitrogen loading and nitrogen leaching, all of the wastewater must first pass through effective primary, secondary and tertiary treatment. Successful removal of solids and algae is also necessary to prevent fouling and clogging of the irrigation emitters.

New Zealand

2025-12-15