In 2022 the New Zealand Geotechnical Society started development of a series of Slope Stability Guidance documents for use in New Zealand. Unit 1 – General Guidance is intended as an overarching document with a series of units (Unit 2 – 7) currently in development. Unit 1 provides overview recommendations on Slope Movement Types and Processes, Landslide Recognition and Identification, Landslide Investigation Methods, The Engineering Geological Model, Risk Assessment, Slope Stability Modelling, Rockfall, Debris Flow, Mitigation and Design Principles and Emergency Response.
Richard Justice from ENGEO will be presenting on the recently published (October 2025) NZGS Unit 1 General Guidance on Slope Stability.
Richard Justice is Principal Engineering Geologist and based in Christchurch. He is also Project Led on the Slope Stability Guidance.
