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Preliminary Closure Study

On 7 April 2022 NZAS released the findings of its Preliminary Closure Study, which outline the work that will take place to remediate the site as part of any future closure.

The following has been taken from the NZAS Press Release from the same date:

The Preliminary Closure Study provides an initial overview of key work programmes that would be undertaken, including:

  • Removing all Spent Cell Lining (SCL) material to be recycled for alternative use. This will be achieved through a combination of export and on-site processing, and NZAS is seeking to accelerate this process irrespective of the closure date.

  • Relocating the current landfill to a new lined and capped landfill at a higher elevation on the Tiwai Site.

  • Demolishing existing assets and removing foundations to a depth of 1.5 metres.

  • Remediating contaminated soil to an industrial standard, noting any future alternative land use will be identified in due course.

Progressive remediation activities to remove waste and improve our environmental performance will take place where possible while operations continue.

The Preliminary Closure Study’s central case has been developed based on a closure date of December 2024, with closure activities estimated to take place over a ten-year period after the end of operations. An extension to operations beyond 2024 would see some activities take place in advance of closure and reduce the timeframe for the successful remediation of the site.

Closure Documents

  • NZAS Preliminary Closure Study Document (PDF, 749.19 kB)

  • Infographic - April 2022 Remediation Update (PDF, 149.76 kB)

  • Ecology Environmental Study Report (PDF, 5.19 MB)

  • Geology Report (PDF, 7.55 MB)

  • Sea Level Rise Impact Assessment (PDF, 14.82 MB)

  • Closure Socio-economic Impact Assessment Report (PDF, 14.95 MB)

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© 2022 Murihiku Regeneration • Website by RS

  • Home
  • About Us
    • Meet the team
    • Structure and Context
    • Office of Upoko
    • Te Rūnaka o Awarua
    • Waihōpai Rūnaka Inc.
    • Ōraka Aparima Rūnaka
    • Hokonui Rūnanga
    • Our Partners
      • MSD Community Connection Service
    • Job vacancies
  • Events
    • Energy and Innovation Expo 2023
      • He Ao Hou - New Futures Murihiku 22 May
      • Live Streaming of Wānanga 23 and 24 May
      • Hosts and Key Speakers 23-24 May
      • Energy and Innovation programme - 23 May
      • Energy and Innovation programme - 24 May
    • Science and Innovation Wānanga 2021
  • Our Mahi
    • Te Ara Aukati Kore - Education, Training, and Capability
      • Anamata Māia: Brave, Bold & Confident Futures Service
        • Core Service Values
        • Our Kaimahi - Staff
      • Have your say!
    • Southern Ocean - Murihiku ki te Tonga
      • Subantarctic Islands
      • The Ross Sea Sector
      • Research and Monitoring
    • Green Energy
      • He Honoka Hauwai - German-NZ Green Hydrogen Centre
      • Clean Energy Workstream
        • Working Group - Meet the Team
        • Renewable Energy Strategy
        • Documents - Key Reading
        • Have your say
      • Hydrogen and Green Energy
      • Hydrogen and Climate Change
      • Bell Bay Hydrogen Cluster
      • Lake Onslow Hydro Scheme
    • Tiwai Future
      • Preliminary Closure Study
      • Cultural Significance of Tiwai Point
      • Environmental significance of Tiwai Point and surrounds
      • Tiwai Point - a contaminated site
      • Key documents and further reading
      • Have your say
    • Te Ao Tūroa - Environment
      • Hokonui Rūnanga Kaupapa Taiao
      • Te Tapu o Tāne Ltd
      • Climate change
      • Have your say
    • Building Sustainable and Resilient Communities
    • Regional System Leadership
      • Building leadership across the takiwā
    • Just Transition
      • Have your say!
  • Latest News
  • Contact