Bluegums Landfill Development

Overview:

The Marlborough District Council engaged Simcox to complete the development of stages 8 & 9 of the Bluegums Landfill in Blenheim.

Stage 8 scope:
The project involved the excavation and placement of over 80,000m3 of rock. The majority of the excavation was completed via ripping with a bulldozer and 48T digger and then carting away with dump trucks. We also completed our own drilling and blasting in the lower layers when the rock got particularly hard. As we were working in an active landfill, we had to manage the haul roads and access points so as not to interfere with the normal landfill traffic.

We also completed all of the associated impermeable clay capping, lining, sediment ponds, leachate drains, gas lines and surface drains for this project.

Stage 9 scope:
Largely the same as Stage 8, although Stage 9 involved a lot more cut-to-fill, making it more cost-effective than the cut-to-onsite-cleanfill approach used in Stage 8. Complex four-layer liner installation and roading upgrades were also completed.

Key quantities include:
• 23,000 m³ of cut-to-fill
• 17,000 m³ of cut-to-cleanfill
• 6,500 m² of clay capping
• 8,000 m³ of leachate drainage chip