220328 - Edwards Street - Slope Stability Assessment

Bev Jenner Const.                                                                               22073-001-Rev0
C/- Westera Partners                                                                             25 March 2022

2.2   Topography
During the site walk-over, topographic features specific to the site were noted, and ground slopes were
recorded using a hand-held clinometer.
As illustrated in Text Figure 4, on a wider scale, the site was located within an undulating dune area, around
650 m inland of Sunshine Beach (present to the east). The site was positioned on a south-westward facing
lee side dune face. The dune crested on a rounded knob on Weyba Street to the east, sloping down to
Heathland Drive in the west. Edwards Street and David Low Way were both formed sidelong to the
predominant slope.

An overall ground slope of about 8° to 9° was present towards the site frontage with Edwards Street, which
was inferred as the natural slope. The natural surface profile had however been interrupted by historic
landscaping features, with a timber retaining wall around 1 m high along the rear boundary (north-east); and
a dug out area to the southern corner. The sideslopes of the dug out area were in the order of about 25°,
with the base being around 5°.




                                                    Localised knob


                                                Subject site




                                                                                        Sunshine Beach


Text Figure 4: Ground surface contours, 1 m spacing (courtesy NC interactive mapping)

Site conditions at the time of our investigation are shown in Text Figures 5 and 6 below.




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