Recent Projects

Katikati MBBR

Water treatment plant with large rectangular tanks and pipes, surrounded by green fields and trees, under a cloudy sky.

ETA completed the automation portion of this wastewater treatment plant upgrade project, developing PLC logic and the SCADA system for the new MBBR plant as well as the existing aeration system and a new standby generator with automatic changeover.

Project Highlights

  • Complex aeration & feed flow control modes to provide operator flexibility in various failure scenarios.

  • Full WBOPDC SCADA Integration allowing the site to be operated from any SCADA terminal in the district.

  • Plant commissioned while keeping existing systems fully operational.

  • Worked along-side Electro (Electrical Contractor) to deliver a cohesive Electrical & Automation offer.

An industrial wastewater treatment facility with black and gray tanks, metal walkways, and vehicles parked beside the equipment, set outdoors with a hedge and trees in the background under a cloudy sky.
Worker in safety vest operating a digital control panel on a wall.

Athenree & Wharawhara WTPS

Two workers in yellow safety shirts working on industrial equipment with large pipes and control panels in a utility room.

ETA completed the both the electrical & automation work for these two plant upgrades which ran in parallel. This required careful management of resources to ensure project milestones were met.

Project Highlights

  • Wharawhara required a temporary containerized plant be built at short notice to allow the existing plant to be demolished. ETA delivered a cost effective solution using existing WBOPDC assets, in only a few days.

  • New plant able to be run whilst still maintaining operability of existing plant, allowing risk-free performance testing and change-back.

  • Three containerized WTP’s added as a variation to scope. These were designed, built and commissioned without affecting main project milestones.

Multiple cables connected to a metal panel with yellow labels, mounted on a wooden background, in an electrical or networking setup.
Two men operating industrial machinery with large pipes in a mechanical room.

Youngson Rd WTP

A technician in a yellow and black jacket working with equipment from a service truck parked outdoors, near a large Kohler generator on a concrete slab, with trees and a cloudy sky in the background.

ETA completed the electrical installation work on this project, with NZ Controls as the nominated Automation Contractor. Together we delivered a functional plant despite challenging site and process conditions.

Project Highlights

  • Existing plant with very limited shut-down windows available, was migrated over to new switchboard and controls with only a few hours downtime per day. Original plan developed by others required a 2-3 day outage, which was not practical.

  • Project completed on time and on-budget for the electrical scope.

  • WBOPDC Central Zone was able to operate with no water restrictions for the 2025/26 summer.

A technician adjusts a control panel on a water treatment system, with water sample testing devices mounted on a white panel labeled for post UV treated water sample, inside a utility room with concrete walls and an exit sign.
Industrial UV equipment with a sign labeled 'UV 1' in the foreground, including various electronic devices and control panels mounted on a wall in a utility room.