Geophysical investigations commence at Borumba, marking the start of exploratory works.

It’s been an exciting year for the Queensland Hydro team with exploratory works officially kicking off in early March. In partnership with our Technical Services Manager, WSP, teams have commenced works undertaking geophysical investigations across the Borumba Project site.  

Surface-based geophysical investigations are used to collect data about underground conditions without the need for extensive drilling. These surveys help us build a detailed picture of subsurface geology, including rock mass characteristics and potential faulting.

The data we collect will be used to pinpoint where more targeted investigations, such as drilling or exploratory tunnelling, may be required across the site.

The geophysical program forms part of a broader exploratory works package for Borumba and is a proven, low impact method commonly used on large infrastructure projects.

Why are exploratory works important and what’s involved?

Exploratory works are critical activities that help us to confirm geotechnical conditions and characteristics of the Borumba Project site, building on the knowledge we have gathered throughout the investigations stage.

The data collected through these works will play a critical role in refining the project’s final design and development of the revised business case, pending state approvals.

Queensland Hydro secured regulatory approval under the Commonwealth Environment Protection and Biodiversity Conservation Act (EPBC Act) to undertake exploratory works for Borumba in December 2025, following a detailed public consultation period.

The approval includes a series of conditions specific to the scope of the exploratory works. Some conditions must be met before works commence while others will be complied with throughout the exploratory works phase. These conditions include disturbance limits, implementing management plans, securing and restoring land in line with the Offset Area Management Plan, and meeting a range of additional requirements.

We’ll be required to report on its compliance with any management plans or conditions imposed on approvals. 

Planned exploratory works we’ll be undertaking over this period include:

• geotechnical investigations
• minor road improvements
• constructing new access tracks
• constructing supporting infrastructure
• establishing spoil stockpile areas
• exploratory tunnel drilling

Download our factsheet for more information.

What does this mean for my community?

Locals who reside near the Project may notice increased truck movements along public roads and temporary changes to traffic conditions. You’ll also see members of our team out and about undertaking surveying and gathering data as part of exploratory works activities.

We know these changes can cause disruption and we’re taking steps to minimise impacts wherever possible. You can view our current works notifications in detail here.

For more information contact our Borumba team by phoning 1800 433 939 during business hours or by emailing borumba@qldhydro.com.au.

First published 2 April 2026.