Resource Recovery Facility
Turning waste into reusable resources while reducing volumes to landfill, cost and carbon impact.
Our purpose-built and award‑winning facility transforms hydro‑excavation, street sweeping and other wet waste into reusable materials – maximising recovery and minimising volume to landfill.
InterGroup operates New Zealand’s leading wet‑waste Resource Recovery Facility – purpose‑built to separate, clean and repurpose materials that would otherwise go to landfill.
Using world‑leading dewatering and wet‑processing technology, our plant extracts clean aggregates, sand, organics and reusable water from mixed waste streams. This enables valuable material to be returned to infrastructure and construction projects, reducing disposal costs and supporting circular economy outcomes.
By diverting waste from landfill and recycling process water on site, we deliver measurable environmental gains for our customers – supported by sustainability reporting that quantifies diversion rates, carbon impact reduction and recovered resource volumes.
What we do
Designed for slurry waste from hydro-excavation, street sweeping and civil works, our facility processes and recovers materials from wet waste streams, which supports:
- Separation, cleaning, grading and reuse of aggregate and sand
- Up to 90% process water recycling within the plant
- Waste volume and disposal cost reduction
- Sustainability reporting: landfill diversion, carbon savings, and recovery metrics
Measured environmental performance
A first-of-its-kind facility in New Zealand, our Resource Recovery plant processesses approximately 60,000 tonnes of material annually, achieving 64% landfill diversion. Key benefits include:
- Water recovery: Of the silt-laden water received, 6,000 tonnes has been recovered for reuse, with the balance (22,200 tonnes) treated and responsibly disposed of, ensuring compliance with regulatory standards and minimising environmental risk.
- Recovered construction aggregates: We have recovered and repurposed 13,000 tonnes of sand, 9,000 tonnes of 0–7 mm aggregate chip, 5,400 tonnes of 7–15 mm aggregate chip, 3,000 tonnes of 19–32 mm oversize aggregate. These recovered materials have been used in construction and civil work.
- Organic waste: 2,100 tonnes of organic material has been diverted from landfill and reused in environmentally beneficial applications.
Our industry-leading facility not only supports our sustainability objectives but also provides our clients with demonstrable environmental value and cost reductions through a significant reduction in waste sent to landfill and maximised resource recovery.