Appendix B - Global Stability Assessment Report

                                                      -4-
                                                                                          Job No: ME21/032

          3.1 Cut Batter

  The cut batter exposed highly to extremely weathered granodiorite with evidence of corestone
  weathering. Corestone weathering typically results in rounded boulders in an extremely weathered
  (XW) rock profile. This suggests the cut batter will most likely have soil like properties throughout.

  The geometry of the cut batter was measured to have a height of 5m to 6m, and an average slope angle
  of approximately 36°. Areas of the batter were observed to be failing particularly at the contact point
  where the weathered rock profile met with the overlaying residual layer.

  The slope angle above the cut batter measured at approximately 20°, sloping down to the crest. The
  vegetation above the cut batter was generally well grassed with the occasional tree. One tree was
  located at the crest of the batter and it is understood the preference is for this tree to stay. It should be
  noted that tree roots can cause root jacking of material and this may pose erosion problems, however
  the removal of the tree would also create instabilities that would also need to be addressed. The batter
  itself was free from vegetation. A cover of erosion protection polymer (refer green coating in site photos
  below) had recently been placed over the batter.

  The following site photos were taken at the time of the investigation on the 4th of November, 2021:




     Site Photo 1: Cut batter conditions                           Site Photo 2: Cut batter conditions




Site Photo 3: Cut batter geometry looking west                Site Photo 4: Erosion patterns in the batter
               across the batter




  Ref: 27222-rev 1                                                              MORRISON GEOTECHNIC
  Mr Geoff Hussin