RFI - Engineering Report

    5. Earthworks
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.



    6. Water and Sewer
There is an existing sewer main traversing the site aligned with the rear of existing
dwellings/properties along Pavilion Street. Noosa A H & I Society Inc (Pomona Show Grounds)
have given their in-principal support to permit the extension of the existing gravity sewer main
within their property to allow the new lots to be fully serviced by a gravity sewer main. Unity Water
have confirmed that if the agreement between JNE Developments Pty Ltd and Noosa A H & I
Society Inc cannot be concluded then Unity Water will permit low-pressure sewer system as an
alternative system. As such we have revised our preliminary engineering drawings to show the
proposed gravity sewer. It should be noted that this sewer line can be extended in the future to
service the development of lots to the north the subject site.

There is an existing 100mm diameter water main along the eastern side of Pavilion Street and a
road crossing to an existing fire hydrant immediately in front on the northern boundary of the site.
A new 100mm diameter main servicing the development will be provided along the new road from
this point. Refer extract from Unitywater infrastructure mapping in Appendix B

Unitywater’s network planning for this site allows for up to 18 dwellings to be established so the
scale of the development is within Unitywater’s network planning forecast. Refer screen shot in
Appendix C.



    7. Conclusions and Recommendations

The preliminary plans along with this report demonstrate that the proposed development can be
serviced and designed to meet Council engineering design standards


Prepared by



Doug Reynolds
RPEQ 9072
TOD Consulting Pty Ltd
18 November 2021




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