220508.2 - Response to Information Request OPW

DME Projects Pty Ltd
P.O. Box 7481
Sippy Downs, QLD, 4556
Tel 0438 157 612
ABN 79 224 274 637

                         Response to Information Request (OPW23/0179) – 128 Gympie Tce Noosaville
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Notwithstanding the above, we acknowledge Councils concerns regarding the impact to the projects
ability to provide dense deep planting and offer that the reduction is not significant enough to justify
a change to driven sheet piles for the full extent of the excavation. As per the advice above, driven
sheet piling by its nature introduces vibrations into the ground that have a significantly higher
likelihood of impacting adjoining structures. The adjacent lot to the west is developed and has an
appreciable dwelling constructed close to the boundary. The contractor has considered this and is
proposing the best method of ground support accordingly based on the advice of specialist ground
support engineers. It is our opinion that best practice engineering methods should be considered
and implemented as a project priority.

We also offer that the proposed boundary fencing is to be core filled block wall that typically has
strip footing similar to the width of the proposed pile wall (in sand) and that the pile wall may only
project >100mm further into the site depending on the alignment/location within the site. The pile
wall cap will also be at a depth below finished surface allowing for potential planting closer to the
wall without preventing root establishment into deeper ground.

Further to this, the structural engineering drawings were provided in the original submission to
demonstrate the extents of the temporary and permanent works with the information that was
available at the time. It is expected the design iterations and plan amendments will be required
following award of the contract and we propose that these can be submitted to Council for
information prior to the prestart meeting. It was not the intention that the structural engineering
plans be included in the Operational Works approval approved documents.

Issue
     Flooding and access to the basement. The driveway ramp to the basement does not
     incorporate the required 300mm freeboard above the defined flood level (DFE).
     Information Required
          3. Amend the driveway and access design to ensure that 300mm freeboard above the DFE
          is achieved for all openings to the basement or provide a passive flood barrier system
          which will achieve the equivalent level of protect and flood immunity for the basement.