Whenuapai and Redhills wastewater project
Wastewater upgrades are required to cater for development.
Duration
Early 2024 - late 2027
Location
Whenuapai, Redhills and Hobsonville
Status
Construction
Project overview
The project involves new wastewater infrastructure to service growth in the northwest future urban zones. The main project works will take place in the Whenuapai and Redhills areas, and along SH18.
The proposal
- Gravity pipelines in southern Redhills
- A new pump station, rising main and gravity pipeline located in Whenuapai
- Two rising main diversions in Whenuapai
- A new tunnel from Westgate to Hobsonville. The new wastewater tunnel will be constructed using micro-tunnel boring and will be at a depth of approximately 20 meters underground
Timeline
Package 1: Dates to be confirmed
Package 2: Dates to be confirmed
Package 3: Late November 2024 - mid 2026
Project map
Current works
Update about Package 3 – Pipeline B works
Our pipeline B works started in early September 2025.
In some good news, the pipeline for our package 3 – pipeline B works have now been completed.
We are just reinstating the farm fencing around our package 3 pipeline B works. We estimate these works will be completed in the next two weeks.
Once the pipeline B works including reinstatement are completed, there are some additional connection works to redirect flows to the new pipeline. Once these works are complete, the current temporary wastewater tankering solution will stop.
Package 3 – pipeline A and pipeline D works
We have finished laying the new wastewater pipes A and D.
Consent documents
Consent documents
Consent decisions and approved plans
Package 1 s92 Response – 9 November 2023
S92 Attachment 1: Updated AEE – 9 November 2023
S92 Attachment 2: Borehole 117
S92 Attachment 3: Cut / Fill Plan for the Pump Station
S92 Attachment 4: Regionwide Wastewater Network Discharge Consent
Appendix B1 – Records of Title
Appendix C – Ecological Impact Assessment
Appendix D – Groundwater and Settlement Effects Report
Appendix E – Detailed Site Investigation
Appendix F – Erosion and Sediment Control Plan
Appendix G – Permitted Activity Assessment
Appendix H – Network Discharge Consent
Appendix I – Records of Engagement
Appendix J – Sinton Stream Culvert Compensation Plan
Appendix K – Wetland Monitoring and Reinstatement Plan
Appendix L – Arboricultural Assessment
Appendix M – Groundwater and Settlement Monitoring and Contingency Plan
Appendix N – Functional Needs Assessment
Appendix O – Pumpstation Dewatering Discharge Water Quality Assessment
Package 1 Revised Notice of Requirement Documentation
Revised NoR Package 1 – AEE – 4 October 2023
Appendix B –Designation Boundary
Appendix D – Ecological Impact Assessment
Appendix E – Landscape and Visual Assessment
Appendix F – Geotechnical Interpretive Report
Appendix G – Detailed Site Investigation
Appendix H – Erosion and Sediment Control Plan
Appendix I – Assessment of Alternatives
Appendix L – District Matters and Permitted Activities
Appendix M – Arboricultural Assessment
Appendix N – Noise & Vibration Assessment
Appendix O – Traffic Impact Assessment
Appendix P – Records of Engagement
Appendix Q – Functional Needs Assessment
Package 2 Lodged Consent Application Documents
Package 2 AEE – 30 August 2023
Appendix B – Arboricultural Assessment
Appendix C – Ecological Impact Assessment
Appendix D1 – Groundwater and Settlement Effects Assessment
Appendix E – Ground Contamination Detailed Site Investigation
Appendix F – Erosion and Sediment Control Plan
Appendix G – Noise and Vibration Assessment
Appendix H – Groundwater and Settlement Monitoring and Contingency Plan
Appendix I – Contaminated Site Management Plan
Appendix J – Traffic Assessment
Appendix K – Records of Engagement