Att 1 - RFI Amended SWMP

Our Ref: 23098/WB
Your Ref: MCU21/0117.01
Monday, 18 March 2024
Noosa Council
PO Box 141
TEWANTIN QLD              4565
Attention: Andrew Gaffney
RE:         Information Request Response
            Proposed Townhouse Development at No 5 Pearl Street, Cooroy

In reply to the information request issued by Noosa Council on 11 March 2024, we provide the
following information and response:

Item 1:        Provide a revised SMP that incorporates a rainfall intensity increase of 20% and sea
               level rise of 800mm to allow for climate change impacts in accordance with AO2.4 and
               corresponding Performance Outcome 2 of the Water Quality and Drainage Code.

Response: Refer to the updated Site Based Stormwater Management Plan (23098 – SBSMP – Rev
          3) which incorporates a detention tank volume increase of 20% from 27.5kL to a
          maximum storage volume of 33.0kL to account for the provision of climate change in
          accordance with Noosa Shire Council’s Water Quality and Drainage Code, as
          requested.

               As the subject site and proposed infrastructure is not in a tidal/flood risk area, it is
               expected that the 800mm to allow for sea level rise is irrelevant in this instance.

Item 2:        Provide a revised SMP that analyses a more appropriate rainfall data source for the
               development site. It is noted that the previous SMP prepared by RECOR used station
               40059 Cooroy Composite.

Response: Refer to the updated Site Based Stormwater Management Plan (23098 – SBSMP – Rev
          3) incorporating the rainfall station 40059 Cooroy Composite, as requested.

Please contact me if you have any further queries on (07) 3369 8411.


Yours faithfully,
MORGAN CONSULTING ENGINEERS PTY LTD




Henry Morgan          MIEAust CPEng RPEQ 11950
Enclosed:             23098 – SBSMP – Rev 3




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