Porirua Wastewater Retention Tank

⁠⁠⁠The Porirua City Centre Wastewater Retention Project involves construction of a new 7 Megalitre wastewater retention asset and associated infrastructure for Porirua City Council (PCC) on land adjacent to the current SH1 north of Porirua Rail Station.

The retention tank will provide wastewater network storage during wet weather events to temporarily reduce the demand on the wastewater conveyance and treatment system. This will reduce the frequency and volume of overflows from the wastewater network into the environment and facilitate projected population growth in Porirua.

The project includes construction of a new single lane access bridge, but this is being procured and constructed separately to this contract in order to minimise consent delays.

It is expected that these contract works will commence following completion of the bridge.
https://www.wellingtonwater.co.nz/pwp/storage-tank/