Otahuhu Statcomm Building


  • Location: SOUTH AUCKLAND
  • Year: 2024

Connell Contractors was selected by both Transpower and Hitachi to provide civil and structural works for the static synchronous compensator (STATCOMM), to be delivered at Transpower’s Otahuhu substation.

A STATCOMM is a fast-acting device that improves voltage management and power quality. The project is part of Transpower’s ongoing work to strengthen the electricity network across the North Island. Connell delivered the civil and structural works for Hamilton STATCOMM project in 2023.

The Otahuhu STATCOMM project commenced in 2024 and includes foundations, earthworks, construction of a faraday cage, underground utilities and building and cable trenching.

The skilled team at Connell delivered 40 concrete bored piles, each 27m deep and 750mm in diameter, to support the STATCOMM building and transformer, with 150m3 of pile caps on top for additional reinforcement. We also excavated 2,500m3 of ground and backfilled with 2,000m3 of imported fill.

Core to this project was a 330m2 building, designed to house the STATCOMM, complete with a Faraday cage to block electromagnetic fields from leaving the valve room, which was formed out of conductive material.

The team also delivered equipment foundations for Hitachi, and directional drilling for underground utilities, drainage and concrete cable trenching.

“Piling works presents risks and challenges, however our team has the experience and expertise to plan for and minimise risks,” said Connell Estimator/Quantity Surveyor TJ Sandhar.

“Our team exceeded expectations by completing the piling in 15 days, taking underground utilities into consideration and mitigating potentially difficult ground conditions. This approach means the project stayed ahead of schedule which was a great outcome for the client.”

The new STATCOMM building project showcases Connell Contracting’s commitment to providing exceptional civil construction and structural services. Our proactive approach, skilled workforce, and focus on risk mitigation ensured a successful project outcome for Hitachi and Transpower.


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