RFI - Stormwater Management Plan

1.0    INTRODUCTION

This report was lodged in support of a Change application to Noosa Council
by Calile Malouf Investments seeking to develop a hotel at Lots 10 and 11
SP195871, Serenity Close, Noosa Heads.

This Revision B proposes significant changes to management of external
catchment flows. Such changes address Council’s RFI dated 2nd December
2022 and subsequent discussions with Council officers.

The proposed development follows four stages of residential unit buildings
developed by Cape Bouvard over the greater Settlers Cove site with Alta
Projects’ Engineers having completed stormwater design, inspection and
certification for all previous stages.

Design solutions presented in this report are consistent with those previously
adopted with minor refinements borne of experience.



2.0    EXISTING CONDITIONS

The subject site is currently undeveloped and supports vegetation subject to
assessment and recommendations by the Ecological Consultant.

The site falls at moderate grades away from Serenity Close towards an
existing concrete pedestrian path with informal natural wetlands areas to the
south.

The entire site consists of loose, poorly graded dune sand and as such
contains no defined overland drainage paths since rainwater infiltrates
directly through the permeable surface.

Stormwater and sewer lines within Easements R, S and F roughly bisect the
site adjacent the existing boundary between lots 10 and 11.

In order to make way for the proposed building footprint, the existing sewer
will need to be relocated to the Serenity Close Road Reserve as per Unity
Water’s SAN Notice at Appendix H.

Architectural changes made in response to planning matters now provide a
viable alignment for a relocated stormwater line and emergency overland
flow path westward along the northern face of the proposed building and
discharging to the Serenity Close cul-de-sac head.
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A6769/22/SWMP/RevB – June
2023                                                                         Page 1 of 9
SH/PL
                       Brah101 Pty Ltd t/as ALTA PROJECTS