Reference Documents - 5 School Street, Pomona - MCU24/0165 & OPW24/0222

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                 4         Earthworks
                 The existing site grades away from School Street sloping towards the drainage channel towards the
                 rear of the lot. The internal site levels range between 89.2m AHD to 91.1m AHD, with the high point
                 located in the north-western corner of the site.
                 The site is predominantly nominated for filling works to achieve compliance with flood levels, therefore
                 retaining walls have been proposed along the site boundary as detailed on the design drawings.
                 All cutting and filling are to be carried out in accordance with AS3798 Guidelines on Earthworks for
                 Commercial and Residential Developments. Any site filling required will be from site spoil (subject to
                 Geotechnical Investigation), provided it meets the requirements of AS3798 and is placed with controlled
                 compaction.
                 Impacts of proposed earthworks on overland flow conditions will not adversely affect adjacent or
                 downstream properties. Proposed earthworks will not encroach on adjacent properties or affect the
                 function of stormwater catchments external to the site.
                 All construction activities, including Erosion and Sediment Control (ESC) methods, would be managed
                 under the control measures of a Construction Environmental Management Plan (CEMP) for the
                 development site. The CEMP and ESC plans would be prepared for submission with the future
                 application for Operational Works Approval.



                 5         Stormwater Management
                 5.1       Existing Catchment
                 The existing site catchment drains to the rear into the environment management and conservation lot
                 (22 Rifle Street). A drainage channel is located south of this lot along Rifle Street which conveys flows
                 from the west to a culvert structure east of the development site. The subject do not directly drain to
                 this channel due to a high bund on the development side of the channel, however, flows generally head
                 easter towards Creek Street and other environmental management and conservation lots. The wider
                 catchment conditions are shown in Figure 3.




                 FIGURE 3: EXISTING STORMWATER NETWORK (SOURCE: NSC MAPPING)




                  15 November 2024                                                                                          Page 6
Document Set ID: 23679130
Version: 1, Version Date: 08/04/2025