LDE three waters engineers on a stormwater and reticulation project in Napier, Hawke’s Bay

Three Waters in Napier

Napier’s three-waters networks have to perform on demanding, low-lying ground. The Heretaunga Plains alluvium, the reclaimed flats around Ahuriri and the port, and an extensive system of stopbanks, pump stations and managed drainage all shape how drinking water, wastewater and stormwater are designed here. Hawke’s Bay also carries the lesson of recent flooding, which keeps stormwater and resilience high on the agenda.

LDE provides three-waters engineering across the region, covering network and reticulation design, treatment, pump stations, capacity and renewals, and stormwater management and consenting. We size and lay out water and wastewater servicing for development near Ahuriri and across the plains, design stormwater that works with the flood-protection network, and plan renewals for ageing assets. On low-lying ground, stormwater frequently has to be pumped and discharged in step with the river and drainage levels, so pump stations and outfalls are designed with the wider flood system in mind.

For Napier clients, that means three-waters engineering grounded in how this coastline and its drainage actually behave. Talk to our Napier team about your next project.

How our Napier team delivers three waters

Three-waters work in Hawke’s Bay starts with the water and the ground. Soft plains alluvium, reclaimed coastal flats and an extensive flood-protection and drainage network mean stormwater, levels and pump stations have to be designed for the conditions rather than off a standard detail. Our Napier engineers design drinking-water and wastewater reticulation, pump stations and stormwater systems that work with the plains and the managed drainage around them.

The work sits alongside our national three waters capability and our water experience across the region, on land shaped by stopbanks, pump stations and managed drainage.

Drinking-water and wastewater reticulation for development on the plains
Pump station design for low-lying and reclaimed ground
Stormwater management that works with the flood-protection network
Capacity assessment and renewals planning for ageing assets

Water services regulation and consenting in Hawke’s Bay

Three-waters projects around Napier are consented through Napier City Council for local infrastructure, with discharge and stormwater consents and flood information from Hawke's Bay Regional Council. Drinking-water supplies are regulated nationally, so we design networks and stormwater to recognised standards and good practice.

Taumata Arowai, the Water Services Authority drinking-water standards and rules
Water New Zealand good-practice guidance for three-waters infrastructure

LDE three waters in Hawke’s Bay

LDE delivers three-waters engineering across Hawke’s Bay, from drinking-water and wastewater servicing for development near Ahuriri and across the plains to stormwater management that works with the region’s flood-protection network. With recent flooding still shaping local thinking, much of our work is about resilience and renewals as well as servicing growth. You can see more of our regional water delivery on the projects page.

Common questions about three waters in Hawke’s Bay

What three-waters servicing does a Napier development need?

Most developments need drinking-water and wastewater reticulation, connections into the council networks, and stormwater management. On the plains and reclaimed flats we pay particular attention to stormwater and levels, so the servicing performs and is consentable through Napier City Council.

How does flood and stormwater management affect three waters here?

The Heretaunga Plains rely on stopbanks, pump stations and managed drainage, so we set stormwater design and finished levels to suit flood information from the regional council. Getting this right keeps development dry and protects the wider drainage network.

Who carries out LDE’s three-waters work in Napier?

Our Napier projects are led by Chartered Professional Engineers from our team, backed by the wider LDE water network across New Zealand and Australia.

Can LDE help with stormwater and pump station design on low-lying land?

Yes. On low-lying and reclaimed ground, stormwater often has to be pumped and discharged carefully, so we design pump stations, conveyance and detention to suit the flood and groundwater levels. Coordinating this with the regional council’s flood-protection network keeps a Hawke’s Bay development serviceable and protects what sits around it.