Geotechnical Support
Trusted Support from Investigation to Construction
SSGS provides professional geotechnical support services to engineers, consultants, developers, councils, and contractors throughout Nelson and the wider Top of the South region.
From early investigation through to construction and reporting, our geotechnical support services are grounded in technical accuracy, field experience, and local knowledge.
Why Choose Subsurface for Geotechnical Support?
We work as an extension of your project team, delivering reliable field support, monitoring, assessments, and documentation that help projects move forward with confidence and compliance.
We understand the realities of construction environments and provide practical, solutions-focused geotechnical support that adds real value to projects. We provide:
Experienced geotechnical field professionals
Strong understanding of local Nelson geology and hazards
Clear communication with engineers and contractors
Efficient, well-documented site investigations
Support aligned with New Zealand standards and consent requirements
We work where it matters most - on site. SSGS provides practical geotechnical support during investigation and construction, ensuring ground conditions are well understood, communicated, and risks are managed early..
Our Geotechnical Support Services
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We provide on-site support for geotechnical investigations, including:
Test pit logging,
Sampling support, including environmental sampling,
Observation and documentation of ground conditions,
Coordination with drilling and excavation works.
Our field support ensures accurate, well-recorded subsurface information that underpins robust geotechnical assessments.
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SSGS acts as a key point of contact between engineers and drilling or earthworks contractors. This includes:
On-site supervision and coordination,
Communication of investigation requirements,
Ensuring drilling and testing align with project scope.
Effective liaison improves efficiency, data quality, and project outcomes.
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Clear documentation is critical to project success and compliance. SSGS provides:
Field logs and investigation records,
Photographic documentation & factual reports,
Data summaries suitable for geotechnical reports,
Support material for consent and design documentation.
We deliver information in a format that integrates seamlessly into professional reporting.
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Our geotechnical inspection services support construction and development works, including:
Earthworks inspections,
Foundation subgrade inspections,
Verification of ground conditions against design assumptions.
Inspections are carried out with a focus on risk identification, compliance, and constructability.
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SSGS assists with site investigations and assessments related to liquefaction susceptibility, particularly for residential and commercial developments.
Our services support:
Data collection for liquefaction analysis,
Site observations and documentation.
This is especially relevant in areas with known or potential seismic risk.
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We support investigations related to natural hazards, including:
Slope stability and landslip risk,
Erosion and coastal hazards,
Flooding and groundwater considerations.
Our local knowledge of Nelson and surrounding environments enables informed, site-specific hazard assessments.
Frequently Asked Questions
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Geotechnical support involves field investigations, monitoring, inspections, and documentation that help engineers understand ground conditions and manage geotechnical risks throughout a project’s lifecycle.
SSGS provides practical, on-site geotechnical support aligned with engineering design and construction requirements.
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SSGS provides geotechnical support services, not engineering design or sign-off. We work closely with geotechnical engineers and consultants, providing accurate field data, observations, and documentation to support their assessments and reporting.
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Geotechnical support can be engaged at various stages, including:
Early site investigation and feasibility
Pre-construction planning
During drilling, test pitting, or earthworks
Construction monitoring and inspections
Post-construction verification
Early engagement often reduces risk and avoids delays later in the project.
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We support liquefaction and natural hazard assessments through site investigations, field observations, and data collection. These services are typically carried out in coordination with geotechnical engineers who complete the formal assessment and reporting.
Reliable Geotechnical Support When It Matters
SSGS provides dependable geotechnical support that helps projects progress smoothly — from investigation through to construction and compliance. Get in touch today to discuss how our geotechnical support services can add value to your project.