4. 220148 - Slope Stability Report (2) · 132006.2554.01

Seachange Builders                                                                            22134-001-Rev0
                                                                                                 26 April 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, the site is located on the easterly
facing flank of a relict dune, located to the west of the primary Marcus Beach foredune. The crest of the
relict dune was located about 30 m west of the subject site, with the toe of the dune running along the
eastern boundary.
The natural surface profile at the site had been interrupted by historic landscaping and residential
construction. Based on a visual inspection it appeared that cut and fill earthworks in the order of about 2 m
depth/height had been previously undertaken, most of which were supported by retaining walls or structural
residential walls. Surrounding ground slopes measured at the time of our assessment and ranged between
about 8° and 12° to the east. A yard area retained at the front of the house sloped at about 1° to the east.




                                                     Subject Site




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

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




Text Figure 5: View of the rear yard, looking west




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