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Values being used to assess alternatives

27 September, 2019

As the current stage of the Southern Landfill only has four years capacity remaining, we are looking at what we do with waste next. We think extending the Landfill is the best way forward, but we need to check out what alternatives are around for Wellington's waste and rubbish. Alternatives like closing the Landfill, building a waste-to-energy plant or using biological processes.

All alternatives will be checked against a set of values including environmental impact, costs, track records in similar locations to Wellington and the time taken from decision to getting the technology fully up and running.

We want to know what values are important to you to help us with our decision making.


  • Community impacts/values
  • Traffic volumes.
  • Dust, noise, litter, odour, visual impacts
  • Cultural concerns.
  • Community image.
  • Resilience implications for Wellington City – ability to manage waste within the boundaries of Wellington City in an emergency.
  • Impacts on public health.
  • Environmental
  • Impacts on the surrounding environment, including fauna (fish, birds, reptiles etc) and flora (plants, trees).
  • Groundwater pollution risk.
  • Carbon emissions.
  • Recreational use of land upon completion.
  • Residual risks upon Landfill closure.
  • Risk of technology in a seismically active environment
  • Technology risk
  • Availability of experts and equipment to maintain, operate and fix equipment.
  • Is the technology future-proof – risk of obsolescence?
  • Refer to existing applications/examples at a similar scale.
  • Scalability of the technology – can it be scaled up or down easily if waste quantities change?
  • Financial
  • Capital cost of option from decision to operation.
  • Operational costs.
  • Funding option.
  • Legislative/Resource Management Act risks
  • Relevant policy direction and political environment for process.
  • Risk of securing consents.
  • Product risks
  • Products produced by the alternative (e.g. compost from a composting plant or electricity from a waste-to-energy plant)?
  • How much product is produced as a proportion of the initial input tonnage?
  • Are there established and enough markets for the final product and how will it be distributed? (e.g Would we produce so much compost that we just end up disposing of it in a landfill?)?
  • What would the residual waste be and how do we manage this safely.

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