Three Waters Engineering

Engineering Solutions for New
Zealand’s Water Infrastructure

At GDC Group, we provide practical, sustainable and cost-effective engineering solutions for New Zealand’s three waters infrastructure.

Three Waters Engineering

Our Services

Our Three Waters Capabilities

  • Stormwater planning, modelling and design
  • Wastewater network analysis and design
  • Water supply planning and design
  • Catchment and network assessments
  • Hydraulic modelling
  • Infrastructure capacity assessments
  • Infrastructure renewal and upgrades
  • Development servicing
  • Technical design and documentation
  • Strategy and master planning
  • Construction support and technical advice

Multidisciplinary Expertise

Engineering, surveying and planning expertise within one coordinated team.

Practical Solutions

Practical, cost-effective advice tailored to each project and site.

Integrated Approach

Disciplines coordinated early to reduce conflicts and improve outcomes.

Built for New Zealand

Aligned with New Zealand standards, conditions and communities.

About this service

Three Waters Engineering

Our team works across stormwater, wastewater and water supply, supporting councils, developers, infrastructure providers and private clients with planning, assessment, modelling, design and project delivery.

With ageing infrastructure, population growth, changing environmental requirements and increasing pressure from extreme weather events, well-planned and resilient water infrastructure is more important than ever.

We combine technical expertise with practical project experience to deliver solutions that are fit for purpose, cost-effective and designed for the long term.

Three Waters Engineering
GDCGDC Group · Three Waters Engineering
Contaminated Land
GDCGDC Group · Three Waters Engineering

Contaminated Land

Understanding and Managing Environmental Risk

Contaminated land can create significant environmental, health, planning and financial risks for property owners and developers.

GDC Group provides practical contaminated land assessments and environmental engineering services to help clients understand these risks and make informed decisions.

Our approach is tailored to each site and project, providing clear technical advice from initial investigation through to remediation and project delivery.

Our Services Include

  • Preliminary site investigations
  • Detailed site investigations
  • Contaminated land assessments
  • Soil and groundwater investigations
  • Groundwater analysis
  • Contaminated land auditing
  • Remediation planning
  • Remediation design and project support
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  • Human health risk assessments
  • Ecological risk assessments
  • Environmental risk analysis
  • Due diligence investigations
  • Contamination liability and cost assessments
  • Property portfolio risk assessments

Our multidisciplinary capability draws on expertise across environmental science, soil science, hydrogeology, geotechnical engineering, toxicology, risk assessment and remediation.

This enables us to provide practical, coordinated solutions for complex contaminated land and environmental challenges.

What we do

Three Waters Engineering

Stormwater

Effective stormwater management is essential to resilient communities, safe developments and sustainable infrastructure.

GDC Group provides stormwater engineering services from catchment planning and hydraulic modelling through to detailed design and project delivery.

We consider existing infrastructure, site constraints, future development, flood risk and environmental requirements to develop practical and effective solutions.

Stormwater Services

  • Stormwater modelling
  • Catchment assessments
  • Hydraulic assessments
  • Network analysis
  • Detention and attenuation design
  • Stormwater infrastructure design
  • Development servicing
  • Overland flow assessments
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  • Flood risk assessments
  • Detailed engineering design

Wastewater

Reliable wastewater infrastructure is fundamental to the health, wellbeing and long-term sustainability of New Zealand communities.

GDC Group provides wastewater engineering services for new developments, network upgrades, infrastructure renewals and improvement programmes.

We assess existing network performance, identify capacity constraints and develop practical solutions that balance performance, constructability and cost.

Wastewater Services

  • Wastewater network assessments
  • Hydraulic modelling
  • Capacity assessments
  • Network performance analysis
  • Infrastructure upgrade planning
  • Development servicing
  • Network extension design
  • Pump station assessments
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  • Rising main assessments
  • Detailed engineering design
  • Renewal and improvement planning

Water Supply

A reliable and resilient water supply is critical to communities, businesses and new developments.

GDC Group provides professional engineering services for water supply infrastructure, network planning and site-specific water systems, including surface water and groundwater supplies.

We develop solutions that consider capacity, reliability, future demand, site conditions and the specific requirements of each project.

Water Supply Services

  • Water supply assessments
  • Network planning
  • Hydraulic modelling
  • Capacity assessments
  • Development servicing
  • Water infrastructure design
  • Surface water assessments
  • Groundwater assessments
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  • Water storage design
  • Reticulation design
  • Infrastructure upgrade planning

GDC Group

Practical Engineering. Designed for the Future.

At GDC Group, we believe good engineering is about more than technical design. It is about understanding the project, the people and the environment in which it operates.

From strategic planning and investigation through to detailed design and delivery, we work alongside our clients to develop practical, resilient and cost-effective solutions for New Zealand.

Whether you are developing a new site, upgrading existing infrastructure or addressing a complex environmental challenge, GDC Group is here to help.

Talk to our team about your next project.

Contact GDC Group