Three waters

Reliable drinking water systems designed for changing demand.

We support drinking water projects from source and capacity assessment through to detailed design and construction. Our team undertakes demand forecasting, network modelling and options assessment, then design treatment, pumping, storage and reticulation solutions.

By considering water quality, pressure, resilience, growth, ground conditions, consenting and whole-of-life operation together, we help councils, developers and communities make informed decisions and deliver safe, reliable networks that can adapt as needs change.

Wastewater solutions - from collection to treatment.

We plan and design wastewater systems that respond to capacity, growth, site conditions and the receiving environment. Our experience includes gravity and pressure networks, low-pressure sewer systems, pump stations, treatment upgrades and onsite treatment and disposal. We assess existing constraints, test options and coordinate civil, geotechnical, environmental, planning and surveying input. This produces buildable solutions that reduce operational risk, support compliance and allow assets to be staged or expanded as demand changes.

Managing stormwater risk while protecting receiving environments.

Our stormwater work combines hydrology, hydraulic and flood modelling with practical design and environmental insight. We assess catchments, overland flow paths, network capacity and climate risk, then develop solutions for conveyance, attenuation, treatment and safe discharge. These may include reticulation, swales, wetlands, first-flush systems, detention basins and erosion and sediment controls. We work with clients, councils and mana whenua to create resilient, site-responsive outcomes that protect people, property, waterways and downstream environments.

Evidence-led planning for smarter long-term water investment.

Good investment decisions start with a clear picture of how a network performs now and under future demand. We use hydraulic pipe network and 2D flood modelling to identify capacity constraints, test growth and climate scenarios, and compare upgrade or adaptation options. Our analysis supports feasibility studies, business cases, asset planning and staged capital programmes. We translate technical findings into practical recommendations so decision-makers can understand trade-offs, prioritise investment and plan infrastructure with greater confidence.

Buildable infrastructure that performs in real-world conditions.

We design pump stations, treatment systems and pressure and gravity networks as coordinated assets, not isolated components. Our teams consider hydraulics, ground conditions, structures, access, maintenance, safety, construction sequencing and future capacity from the outset. We can support options assessment, detailed design, procurement, construction monitoring, commissioning and handover. Close collaboration with operators, clients and contractors helps resolve issues early and delivers infrastructure that is practical to build, operate, maintain and adapt.

Investigation, assessment, monitoring and risk management to help clients make sound decisions.

Our environmental scientists and planners work alongside engineers to understand water quality, groundwater, surface water, discharge effects and receiving environments. We provide investigations, monitoring programmes, effects assessments, consenting strategy, consent applications, compliance reporting and environmental management advice. Bringing this expertise into a project early helps identify risks, shape better options and avoid late redesign. We work constructively with clients, regulators, mana whenua and other stakeholders to achieve solutions that are technically robust, realistic and environmentally responsible.