In the aftermath of Cyclone Gabrielle, the Tairāwhiti region faced major infrastructure challenges — particularly across key bridge sites impacted by flooding and ground movement.

As part of the regional recovery programme, we were engaged by Gisborne District Council to carry out a suite of critical geotechnical investigations. Our role focused on assessing ground conditions beneath seven damaged bridges to inform the design and reconstruction of more resilient structures.

The investigation involved:
- Machine-drilled boreholes to depths of up to 60 metres
- Cone Penetration Testing (CPTs)
- Standard Penetration Testing (SPTs)
- Laboratory analysis of soil samples to determine strength, composition, and behaviour
- Piezometer installation for ongoing groundwater level monitoring

Project delivery followed a disciplined, collaborative structure including weekly updates, internal reviews, and regular meetings with council stakeholders, keeping the programme aligned with recovery priorities. Oversight from both the Project Manager and Division Manager ensured technical quality, safety, and adherence to the schedule.

This project showcased Onsite's ability to respond rapidly with technical rigour, precision fieldwork, and a strong governance model in the face of post-disaster urgency.