Nelson North Wastewater Treatment Plant Operations and Maintenance

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Nelmac operates and maintains the two treatment plants in the Nelson region, one of which is the Nelson North Wastewater Treatment Plant (NNWTP). The Plant has primary screening, a primary clarifier, a trickling filter, one 26ha baffled oxidation pond, two 7ha planted wetlands and a sea outfall.

Nelmac manages the treatment plant to perform within resource consent conditions. We undertake routine maintenance of all plant and equipment including SCADA and are responsible for all operations 24/7, including emergency response. Our team conducts routine maintenance, minor repairs and upgrade projects. Outside the facility, we also manage vegetation control, vermin or pest control, and general exterior building maintenance.

This treatment plant has had a problematic history with respect to odour complaints. Since Nelmac has taken on the full operational contract, we have managed the plant essentially odour free and well within consent requirements. 

Nelmac’s commitment to improve the operation and perception of this treatment plant by working closely with the Client's representatives, the public, and other affected parties to understand the situation was a major contributing factor to the reduction in odour events.  

Project Title
Nelson North Wastewater Treatment Plant Operations and Maintenance
Client
Nelson City Council

Location
Nelson

Services
Ongoing operations and maintenance contract for a regional wastewater treatment plant

Project Budget
$650,000 pa

Year
2008 – present, with sole contract responsibility from 2011

Nelson Utilities Operations and Maintenance Contract

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Nelmac is responsible for ongoing maintenance of this network, including network inspections, operational checks and sampling, interface between customers and the client, reactive maintenance, monitoring and maintaining the electrical / SCADA network, minor repairs, water compliance testing and monitoring, and various projects.

Our team is on-call 24/7 including a duty officer roster system and emergency response services.

Over the last five years, Nelmac has achieved full compliance to the target performance levels of 95% or above.  As a result we have achieved full compliance with NZ Drinking Water Standards and have had no financial deductions from the Client (as allowed for in the contract).

Project Title
Nelson Utilities Operations and Maintenance Contract

Client
Nelson City Council

Location
Nelson

Services
Routine, pro-active and reactive maintenance of Nelson City Council's wastewater and stormwater networks

Project Budget
Approx $4.2m pa

Year
2005 - Ongoing