Huntly & Ngaruawahia Wastewater Treatment Plant Upgrades
This project is being constructed under an NEC3: Engineering & Construction Contract, cost reimbursable with a target outturn cost arrangement.
This project involves the upgrades of two wastewater treatment oxidation pond sites. The works primarily include the desludging of existing pond sludges, driving of piles and the installation of baffle curtain walls within the ponds, 17,000m3 of earthworks construction, and the construction of numerous pump stations, inlet screen structures and drainage lines. A new pond for collecting septic tanker refuse and a septage unloading facility were also constructed.
A combined total of 27,000m3 of waste sludge was removed from the two ponds using our dredge and flocculation plant. This material was pumped into a temporary drying pond at the Ngaruawahia site and into geobags at the Huntly Site where it was dewatered for removal at a later date.