CRL has adopted and adapted the Infrastructure Sustainability Council of Australia's (ISCA) IS rating framework as a basis to evaluate and improve sustainability performance.
The IS framework is a comprehensive rating and certification tool for evaluating sustainability across project design, construction and operation.
The CRL project will need to meet criteria across the framework's six themes:
Management and Governance
• Management Systems
• Procurement and Purchasing
• Climate Change Adaptation
• Energy and Carbon
Emissions, Pollution and Waste
• Discharges to Air, Land and Water
People and Place
• Community Health, Well-being and Safety
• Stakeholder Participation
• Urban and Landscape Design
CRL is a pilot project for the use of the IS rating framework in NZ and is targeting an ‘Excellent’ rating for both the design and construction phases.
The IS rating tool focuses the project to:
- Model and measure resource consumption
- Identify and implement feasible opportunities to reduce consumption
- Achieve significant reductions in resource use across the infrastructure lifecycle.
Mahi Rauora Aratohu
CRL has worked with Mana Whenua to identify opportunities to respond to New Zealand's cultural context within this framework, ensuring the sustainability criteria are compatible with te Aro Māori. This work, embedding cultural values across the IS framework, has led to the creation of a custom-made CRL Technical Manual, titled Mahi Rauora Aratohu.
Mahi rauora translates directly to 'work on the health of all things' and aratohu translates as 'pathway marker' but can be interpreted as guidance, meaning this is 'the guidance for our work on the health of all things.' This technical guidance will be used for the remaining contracts.
Progress to date
The CRL has been awarded a "Leading Infrastructure Sustainability (IS) Design Rating for Contract 1 (Britomart Works) by ISCA. leading is the highest possible rating achievement within the IS scheme.
This award follows on from the 'Leading' rating achieved by Contract 2 (Albert St works).
Key initiatives for Britomart
Key sustainability initiatives planned for the Britomart works include:
- Water-efficient fittings specified for the refurbished Britomart Station, which are projected to reduce water usage by more than 50 per cent, with associated reductions in utility bills
- The protection and enhancement of the Category 1 heritage-listed station building
- Smart controls on esclators and other equipment to be installed in the station to reduce electricity use
- Collaborating with Mana Whenua to embed cultural values across the IS framework; this is a first globally
- Replacing diesel generators with grid electricity during construction.
Key initiatives for Albert Street
Key sustainability initiatives planned for the Albert Street works include:
- Switching from diesel generators to grid electricity during construction
- The use of LED street-lighting for the Albert Street reinstatement
- Collaborating with the Energy Efficiency and Conservation Authority (EECA) to promote efficient driving and monitor machinery during construction to reduce fuel use
- Changing excavation methods to reduce diesel and water use
- Installing tree pits in the street to collect and filter stormwater runoff.