New Zealand Awards Kerepehi Sewer Renewal Contract to Cambridge Excavators Limited

The Hauraki District Council has awarded the contract for the Kerepehi Sewer Renewal Project (1258_001) to Cambridge Excavators Limited, marking a significant investment in wastewater infrastructure within the Waikato region.

The contract award, finalized on 18 May 2026, will support the modernization of critical sewer assets in Kerepēhi, helping improve the reliability and long-term performance of the community’s wastewater network.

Contract Details and Scope

The awarded tender (RFx ID: 33554097, Reference No: 1258_001, TOT Ref No: 26261371) was procured through a Request for Proposals (RFP) process managed by Hauraki District Council’s Service Delivery division.

The project focuses on replacing an aging sewer rising main that has reached the end of its operational life. According to the procurement documentation, the council identified an opportunity not only to renew the asset but also to increase its capacity to meet future service requirements.

Key Project Components

The scope of works includes:

• Construction of a new DN140 polyethylene (PE) sewer pipeline

• Replacement of the existing sewer rising main

• Upsizing wastewater conveyance capacity

• Associated civil and utility infrastructure works

• Integration of the new pipeline into the existing wastewater network

The project extends from the Kaikahu Road North Pump Station discharge point to the Rata Street manhole, as detailed in the engineering design documentation.

Entities Involved

The procuring authority, Hauraki District Council, owns and operates the wastewater network serving Kerepēhi and surrounding communities. The council is responsible for ensuring the long-term reliability and sustainability of essential water and wastewater infrastructure throughout the district.

The successful contractor, Cambridge Excavators Limited, is a well-established civil construction company based in Cambridge, Waikato. The company specializes in infrastructure development, earthworks, underground utilities, drainage systems, and public works projects across New Zealand.

Strategic Importance for Kerepēhi

Wastewater infrastructure is a critical component of public health and environmental management. The sewer renewal project will strengthen the resilience of Kerepēhi’s wastewater system while reducing the risks associated with aging infrastructure.

Expected benefits include:

• Improved wastewater network reliability

• Reduced risk of pipe failures and service disruptions

• Increased capacity to accommodate future growth

• Enhanced environmental protection through modern infrastructure

• Lower long-term maintenance requirements

The project aligns with broader municipal objectives to upgrade aging public assets and improve essential service delivery for residents.

Economic and Community Impact

Infrastructure renewal projects such as this generate multiple community benefits beyond the immediate construction activity. Local investment in wastewater systems helps protect waterways, support residential development, and maintain public confidence in municipal services.

The contract will also contribute to employment opportunities and economic activity within the Waikato construction sector during the delivery phase.

Technical and Procurement Insights

The new DN140 PE pipeline has been selected to provide improved durability, corrosion resistance, and operational efficiency compared with older infrastructure. Polyethylene pipe systems are widely used in modern wastewater projects due to their flexibility, reliability, and long service life.

The Request for Proposals procurement method enabled Hauraki District Council to evaluate contractors based on technical capability, experience, project methodology, and overall value.

Conclusion

The award of the Kerepehi Sewer Renewal contract to Cambridge Excavators Limited represents an important infrastructure upgrade for the Hauraki District. By replacing aging wastewater assets and increasing network capacity, the project will enhance service reliability, support future community growth, and strengthen environmental outcomes across the region.

As construction progresses, the renewed sewer system is expected to provide long-term operational benefits for residents and businesses throughout Kerepēhi.

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