SUPERSEDED Compiled Reference Document - MCU24 0153 & OPW24 0202 (As Published)

        4.5             Groundwater
        No signs of groundwater seepage (‘springs’) were observed during our walk-over. Groundwater was not
        encountered in the boreholes at the time of investigation.
        Groundwater conditions are expected to be reflective of prevailing weather conditions and seepage may
        develop particularly following periods of prolonged or heavy rainfall.


        4.6             Surface Drainage
        Surface drainage would be expected to follow natural surface contours to the east, draining into
        stormwater infrastructure at the east of the property and towards the Henderson Street roadside
        drainage system. It is noted that the site has a relatively large catchment; however, most runoff from
        upslope of the property is anticipated to be intercepted by the existing stormwater infrastructure
        associated with the neighbouring structures and roadside drainage systems along Elanda Street.
        Given the sandy nature of the site, rainfall would normally be anticipated to infiltrate the ground surface.
        However, as the proposed development will occupy a large part of the block, significant run-off from
        hard surfaces will occur. Nevertheless, where directed into swales rather than pipes, such run-off would
        be expected to infiltrate into the natural sands relatively rapidly.
        No significant surface run-off features were noted during our assessment (e.g. deep rilling or scour/wash
        out scars). This indicates that significant overland flow is generally absent during rainfall events.
        Recommendations to improve surface drainage as part of the development works are provided in
        Section 6.5.




        Proposed Unit Development
        30 September 2024 | 24265-001-Rev0                                                                         7
Document Set ID: 23376055
Version: 1, Version Date: 28/11/2024