Central Landfill Enabling Works

Client:  New Plymouth District Council, South Taranaki District Council, Stratford District Council

Completion: March 2020

This project was for the new Taranaki landfill at Eltham. It held a significant public profile and interest.

Stringent environmental management planning was required due to potential contaminated soil issues and disposal controls. Environmental controls and considerations included dust suppression; disposal management plans including prescribed journey management planning; protection of the liners; liaising with neighbouring landowners.

Decanting Earth Bunds (DEBs) were constructed to control stormwater runoff. Dust suppressants were utilised by damping down; grassing, hay mulching (80,000m2 area) and use of hydroseed spraying. Silt fencing was used to maintain surface water runoff and diversion to the DEBs and silt retention ponds.

Enabling Works:

•        Protection of the existing monitoring wells and services.
•        Construction and maintenance of erosion and sediment control measures including two sediment retention ponds.
•        Employing dust control measures.
•        Site drainage.
•        Site clearance and stripping (42,918 m²).
•        Supplying and installing farm gates and farm fences.
•        Formation of farm access roads.
•        Excavation of material to stockpiles including operation and maintenance of the stockpile area (47,108m³).

Reinstatement Works:

• Respreading stockpiles, removing environmental controls and reinstatement of the farmland.