An independent assessment by Tonkin + Taylor identified three intersecting issues – landfill stability, leachate resilience and airspace management. In December 2021 the NTRLBU approved a $5.9m upgrade of the landfill to increase airspace, help extend its life, and reduce environmental risks. The objective of the works is to ensure the resource consent conditions regarding landfill stability are satisfied and there is low residual risk associated with landfill slope stability, both during the operational and closed phases of landfill life. In addition, the works include a degree of resilience that is reasonably practicable to achieve with good landfill stability in the closed phase of landfill life. The works are being undertaken over two years. 

In September 2023 construction began on a significant leachate system upgrade and stability project at York Valley Landfill. This project was competitively tendered on the open market and was successfully won and awarded to Mike Edridge Contracting.

The project was undertaken to increase the stability of the landfill and the resilience of the leachate system long into the future.  The project was completed on programme and on budget with no significant health & safety or environmental incidents.

Quick Facts  

-New access road realignment and construction

-228m of new leachate wells

-5 new ground water monitoring wells

-820m of new leachate pipe work

-72,000m3 of compacted site won fill into the lower buttress construction

-376m of new stormwater channels