HBC Wastewater Strategy

Objective of the strategy

The objective of the Hibiscus Coast Wastewater Strategy was to identify a long-term option for collecting, treating, and disposing of sewage from the Hibiscus Coast Communities.

Decisions made after review process

After a comprehensive review of the options available, the decision was made to to integrate and upgrade the Orewa and Whangaparaoa Wastewater/Sewerage systems. 

The following Index of Papers provides a summary of that review process.

Review Process - Index of Papers
1	Strategy Review Process Overview
2	Wastewater Basics
3	Wastewater Management	Flow Chart Diagram
4	Existing System	Flow Chart Diagram
5	Design Considerations
6	Performance of Existing System	Flow Chart Diagram
7	Issues and Outcomes
8	Long Listed Options	List of Appendices
9	Short Listed Options	Flow Chart Diagram

 
Overview of projects

The Strategy will be undertaken in three projects:

1. The Hibiscus Coast Trunk Pipeline Upgrade
2. The Army Bay Wastewater/Sewage Treatment Plant Upgrade
3.  The Orewa Oxidation Ponds Redevelopment

• Installation of underground storage tanks at the Stanmore and Tindalls Wastewater Pump Stations is now complete.
•  These tanks will be used in emergencies (such as high rainfall and power outages) to store wastewater that cannot be pumped by the pump station.
• They enable system operators to sort out problems before wastewater overflows into the environment.
• The Stanmore tank will offer a minimum of four hours storage in the worse conditions (wet weather with a power cut) while the Tindalls tank will provide seven hours storage.
• The Strategy also involves installing a new trunk pipeline from Silverdale North to the end of the Whangaparaoa Peninsula.
• This pipeline will provide the backbone to a system that will enable the community flows to be pumped to the Army Bay Sewage Treatment Plant for treatment and disposal.
• It is designed to be able to service the community growth until at least 2051.