CREATING GREAT PLACESSupporting our people

Kerikeri Wastewater Project December 2019

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APRIL 2020

Treatment plant completed

MARCH 2014

Council go-ahead for project

APRIL 2016

Treatment plant land bought

MAY 2018

Treatment plant tender awarded

MAY 2018

Earthworks start at treatment plant site

MARCH 2017

Sewerage network contractor chosen

OCTOBER 2016

Resource consent for plant issued

MAY 2017

Network expansion begins

SEPTEMBER 2020 Plant and sewerage

network fully operational

OCTOBER 2020Old plant

decommissioned

NORTHLAND ENGINEERS IMPRESSED WITH NEW WASTEWATER TREATMENT PLANT Members of the Northland branch of Engineering NZ gathered last month to tour the site of the new Kerikeri wastewater treatment plant. Twenty engineers viewed the main structures of the plant and heard about the technological advances it will utilise. Mike Hayes, Broadspectrum’s Project Manager for construction of the new plant, and Simon Ruddenklau, Broadspectrum’s Site Engineer, led the tour.

The visitors welcomed the opportunity to see the extent of a major Council project for themselves. They were struck by the large capacity of the new plant and its innovative treatment methods, especially how high the

quality of wastewater discharged from its system will be.

Construction of the new plant has been moving ahead at a good pace over winter and spring. The drier than usual winter in the Far North has meant good working conditions and most of the plant’s main structures are now in place.

The new plant replaces the ageing Shepherd Road plant and will be able to treat three times the amount of wastewater the old plant was designed for. The new plant will serve all properties already connected to Kerikeri‘s wastewater system, plus 350 properties currently reliant on septic tanks. It will also have

capacity to serve up to 400 additional properties. The plant is designed for expansion to provide extra capacity for further growth.

The Kerikeri Wastewater Project is the Council’s biggest infrastructure project. When completed and connected, it will extend service to more than 1400 Kerikeri properties. A series of important amendments, including a rigorous review of compliance and health and safety in the plant design, have resulted in an extended timeline and increased budget for the project. The plant itself is now intended to be completed by April 2020 and fully operational by September 2020. The old plant will be decommissioned by October 2020.

PROJECT TIMELINEKOPAPA RARANGI WA

You should never flush wipes, nappies and sanitary items. They reduce the longevity and efficiency of the pipe network and can form solid blockages that disrupt treatment systems.

After being screened for solid objects, wastewater goes to aeration tanks where tiny sludge particles and compounds are removed through settlement and biological processes.

Wastewater is micro-filtered and ultra-sterilised under ultraviolet light before it leaves the treatment system.

As it leaves the plant, filtered and sterilised wastewater is clear in appearance and of a quality that won’t impact on the surrounding habitat.

Treatment plants operate under rules that state discharged wastewater must not change the look of any wetlands, release any odour, or have any adverse effect on local aquatic life.

Did you know?

Mill Ln

Hall Rd

Access Rd

WAIPAPA RD

10

Fairwa y Dr

Greenway Dr

King St

Kerikeri

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WAIPAPA RD

KERIKERI IN LET ROAD

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Taking a tour: A group of Northland engineers recently took a close look at the main structures of the new Kerikeri wastewater treatment plant.

Neweffluentmain Newoutflowmain New wastewater treatment plant Existingtreatmentplant /

new pump station New sewerage network area Current sewerage network area

Waitangi Forest