response to information request updated letter - pomona subdivision 19.11.2021

   13. Noting that all retaining structures must be within the lot they support, or
       otherwise be covered under an easement, provide additional detail on the
       proposed retaining walls. The detail must be prepared by a Registered
       Professional Engineer of Queensland and include but not be limited to:

           a. cross sections at the highest point of each of the proposed retaining
              structures indicating the location of the walls and foundations in
              relation to the property boundaries, the proposed building pad and
              finished ground levels;
           b. the type of wall construction (material, foundations, etc.);
           c. the structures required to collect and convey existing overland flows
              that are impacted on by the construction of the walls;
           d. any fencing to be installed on top of or beside the walls;
           e. the location of any services, above or below ground, adjacent to the
              proposed walls.

The retaining wall details are included as part of the updated TOD engineering plans and
specific comment below:

       The preliminary drawings show proposed earthworks for the site that includes
       providing level house pads for future owners to build on. We have shown indicative
       locations and heights for retaining walls on the preliminary drawings; however it is
       planned to minimise the extent of retaining walls for aesthetic and costs reasons.

       Full extent of retaining walls will be determined during the detailed
       design/Operational Works phase. A typical detail for a concrete sleeper wall has
       been included in the preliminary engineering drawings, however it should be noted
       that as these are proprietary items they are designed and certified by the
       supplier/contractors RPEQ.

       In order to construct the bio retention basin, it will be necessary to import fill to the
       site to lift the blocks and road level above the basin levels. The amount of fill will
       be refined during the detail design.




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