271117 Techtonic GeoTech Cooroy Mtn Rd

Mr Ken Freeman                                                                                  17385-001-Rev0
                                                                                              27 November 2017




Text Figure 6: View of platform formed for car port west of house, looking east


3.4    Groundwater
Groundwater was not encountered in the Bowler boreholes, or Tectonic test pits. No groundwater seepage
(‘springs’) was observed during the walk-over.

3.5    Surface Drainage
Natural surface drainage paths may be variable in the immediate vicinity of the proposed building envelope,
but natural drainage would be expected to follow ground surface contours to the north. The site is located
midslope on Mount Cooroy and is susceptible to surface runoff entering the site from the upslope
catchment. Surface water is expected to drain from the site considering the moderate to steep gradients and
relatively low permeability of the clayey soils and rock. No visible signs of soil erosion were observed during
the walkover.

3.6    Vegetation
In the vicinity of the house, and proposed areas for extensions, there were landscaped gardens present.
Vegetation included grass, plants, shrubs, and small trees. The garden at the rear (north) of the house
consisted of a level terrace (consisting of fill around 1.4 m deep) with a batter (26°) below. This batter did
not show any signs of slope instability at the time of the walk-over.

3.7    Buildings and Other Structures
The existing house comprised a split-level home over two storeys, with the upper level on the upslope side
forming the entrance. To the south-east of the main house was a garage, and east of the house in the
garden area was an office. At the rear (north) of the house was an existing swimming pool. On the southern
side of the driveway a two-tiered rock boulder retaining wall had been recently constructed, and was around
3.5 m high.

None of these existing structures showed signs of visible distress (i.e. cracking) at the time of the walk-over
which would indicate possible slope instability.




                                                          6/13