The Service
Managing Slope Risk
Before It Manages You
North Queensland's terrain — from the steep Wet Tropics ranges and Paluma escarpment to the dissected inland tablelands of the Atherton and Charters Towers districts — presents significant slope instability challenges. Intense seasonal rainfall, deeply weathered profiles and expansive clay soils create conditions where slope failures can occur without warning, threatening lives, infrastructure and development assets. PGI Geotechnical Group provides rigorous slope stability assessments that quantify hazard risk and define practical, cost-effective engineering solutions.
Our assessments integrate detailed field mapping of slope geometry, drainage patterns, seepage features and distress indicators with targeted subsurface investigation to characterise the materials controlling potential failure mechanisms. We then perform limit equilibrium stability analyses to determine factors of safety under static, seismic and critical rainfall-induced groundwater conditions — giving you a defensible, quantitative basis for design decisions.
We provide landslide hazard and risk assessments for development applications, infrastructure corridor studies and post-event investigations, delivering reports that satisfy Townsville City Council and other NQ local authority planning requirements, Queensland State Government guidelines and Australian Geomechanics Society (AGS) standards for hazard risk communication.
Key Deliverables
- Slope mapping & hazard identification
- Limit equilibrium stability analysis
- Rainfall-triggered failure assessment
- Seismic stability evaluation
- Remediation design options
- Landslide hazard & risk rating
- Planning authority compliance reports
- Monitoring recommendations
When You Need It
Slope Stability When
the Ground Is at Risk
Development Application Compliance
Your council or state government has requested a landslide hazard assessment or slope stability report as a condition of your development application — and the report must meet planning authority standards to proceed.
Slope Failure Investigation
A landslide or slope failure has occurred on or near your site. You need an independent engineering assessment of the failure mechanism, risk to structures and people, and practical remediation options.
Cut Slopes & Retaining Structures
You're planning a significant excavation, engineered cut slope or retaining wall and need stability analysis to confirm the earthworks are safe under all design load cases, including seismic and long-term groundwater conditions.