Landsliding and localised road embankment instability had been a regular occurrence on the Bulli Pass Road near Wollongong for many years. In the mid 1970's the Roads & Traffic Authority of NSW sought advice from SCE as to:
- The causes of the landsliding.
- The necessary remedial measures to be implemented on a progressive basis.
The project involved the investigation of four  major landslides and 20 minor landslides, with the prime cause of the landsliding being identified as changes to the groundwater regime as a result of mine subsidence.
SCE then prepared 'concept' designs for the stabilisation works to the roadway and the surrounding natural drainage systems and then assisted with the implementation of many of the recommended works.