Geotechnical drilling for the southeast section of Green Line

Prior to main construction of the Green Line LRT, due diligence geotechnical borehole drilling will be completed to test ground conditions at key structure locations.

Contract status
A Request for Proposals was posted on December 12, 2024. The submission deadline was January 23, 2025. When the contract is awarded, this page will be updated with the supplier.

Scope of work
This work will comprise geotechnical drilling of approximately 160 boreholes along the southeast alignment and will provide valuable data on ground conditions that Green Line’s design team will use to optimize the civil design.

Location(s)
Drilling will take place in the southeast at key structural locations, such as stations, bridges and retaining walls. 

Timeline
Geotechnical drilling is anticipated to begin in late February 2025 and be complete by June 30, 2025. This may be extended if further borehole investigation is identified.

More information
Over the past ten years, Green Line has drilled over 800 boreholes and test pits, providing critical information on soil conditions, bedrock and ground water before main construction begins.

Now that the designs for Green Line structures have reached 60% completion, the exact locations of stations, bridges, retaining walls and guideways are known. More data is required on the ground conditions to support detailed designs, which can allow construction to begin. The data provided from this drilling will support the final designs of all stations and structures on the Green Line.

Anticipated Start Date: Late February 2025
Anticipated Completion Date: June 30, 2025