Hydropower and Dam Protective Coatings

Specialist protective coatings to extend the life of hydropower and dam assets

Surface preparation, corrosion protection and refurbishment for New Zealand’s hydropower infrastructure

InterGroup delivers hydropower protective coatings and refurbishment services for power stations and dams across New Zealand. From penstocks and head gates to turbine pits and draft tubes, we provide specialist surface preparation and corrosion protection to extend asset life. Our teams combine coatings expertise with specialist equipment and confined-space controls to work in challenging environments.

What we do

Our expertise includes:
– Protective coating application and refurbishment
– High-pressure and ultra-high-pressure water blasting
– Abrasive blasting, surface preparation and existing coating removal
– Penstock, head gate, spiral and scroll case, turbine pit and draft tube refurbishment
– Dust extraction, ventilation and containment
– Vacuum recovery of spent abrasive and responsible waste handling
– Confined-space management and emergency recovery systems
– Coating quality controls and inspections

Proven project experience

Our experience includes refurbishment projects at Arapuni Hydro Dam, Maraetai Hydro Power Station and Matahina Dam, supporting assets operated by Mercury and Contact Energy.
These projects have involved specialist blasting, coating removal and protective coating application, with staged delivery across internal hydropower components.