geotech report · 132003.220660.5

4.3.1 Topography
The site is located on a hillside that slopes down to the north and north-east at typically between about 10o
and 25o. A gully feature orientated approximately north-south was located along the eastern side of the
property and the side slopes ranged between about 23o and 33o.

The site was accessed via an asphaltic concrete surfaced access road that curved round to the east and south-
east from Bayview Road and a concrete driveway which curved and sloped down to the north-east from the
access road. The adjacent section of Bayview Road to the north-west appeared to have been formed by
placing fill on the slope; the adjoining tree covered bushland below the road sloped steeply down to the east
at a maximum of 41o.

The site surface levels had been terraced to form a building platform for the existing house and the
surrounding yard areas. The flat terraces had been excavated back (to the west) into the hillside and also
formed by placing fill on the downslope sides of the property, with the fill in some areas supported by
retaining walls. The flat to gently sloping terraces in the area of the proposed lift were supported by stacked
boulder retaining walls (see Plate 2).




    Plate 2: Looking west; boulder retaining wall yard area to the east of the house in the area of the
                                              proposed lift

The fill batter below the pool sloped down to the east at a maximum of 33o and the was supported by a series
of ad hoc timber log retaining walls (0.2m to 1m height).

For further details of the retaining walls refer to Section 4.3.3 below.

32032URrpt                                          5