Snells and Algies Bay Saline Intrusion Rehabilitation Project

Project overview

The Snells/Algies Saline Intrusion Rehabilitation Project involves replacing 48 manholes and relining over 2kms of wastewater pipeline that runs along the foreshore of Algies Bay and Snells Beach to the Snells Wastewater Treatment Plant (currently in construction).

This project is needed to prevent seawater from entering the wastewater network particularly during high and spring high tides. Seawater is highly corrosive and can lead to significant damage of pipes, pumps, and other critical components within the wastewater treatment plant.

The project will ensure the local network continues conveys and treats wastewater while reducing the likelihood of leaks into the marine environment, safeguarding both public health and marine ecosystems.

Maps

How will these works impact you?

Timing: Works will take place from late - August 2025 to early 2026, between 7am and 5pm, Monday to Friday. Please note that activities are tide-dependent. Any changes to the schedule will be communicated in advance.

Access: The pipeline will be accessed via manholes located in public reserves, roadways, and private properties. Due to the nature of the work, crews may operate across multiple sites simultaneously during the project period.

Worksites

• A section of the Algies Bay Reserve Carpark and berm off Heron Lane will be occupied for the duration of the project; however, we will make every effort to minimise disruption to pedestrian access and pathways.

Private Property

• If access to your property is required, you will be notified ahead of time.

Safety

• Work will occur near sewer manholes. Safety controls such as fencing and signage will be in place to protect both the public and our workers.

Noise

• Some noise is expected during the works, but it will be kept to a minimum and within levels approved by Auckland Council.