MCU10/2083 Information Request Response 37 Gibson Rd Noosaville

     SUNSHINE COAST
                                                                                                                  URBANC 0 N S U L T ANTS
     Monday, 20 December 2010
     M 2383-001

     Sunshine Coast Regional Council
     Locked Bag 72
     Sunshine Coast Mail Centre Q 4560




     Att:      Mr Denis Wallace
     Re:       MCU10/2083
               Marquette Bowen Pty Ltd
               37 Gibson Street, Noosaville




     Dear Denis,


     Reference is made to the Material Change of Use application noted above.

     We acknowledge receipt of Council's correspondence dated 8 December 2010 and provide additional information
     requested for Items 14 & 15 as follows:


     14. The Site Based Stormwater Management Plan has been amended to ensure that the order of water
            treatments is consistent i.e. roofwater to raingardens first, then pass to rainwater tanks. Refer to Revision E of
            the plan attached to this response for details.


            As the roofwater system operates under approximately 3m of head (effectively operating as a pressure
            system) the raingardens can be elevated above finished ground level (if required). The flexibility of being able
            to elevate the raingardens (if required) will ensure adequate grade for drainage to the underground rainwater
            tanks. The location of the raingardens has also been rationalised to assist with draining to the underground
            rainwater tanks.

            The central car park area will have a finished surface pavement level of approximately RL 2.40 AHD (subject to
            detail design). The bio-retention systems have an invert level 1.00m below the pavement level. The existing
            Council stormwater system in Gibson Road has an upstream invert level of RL 0.48 AHD and approximately RL
            0.00 AHD in Skipper Place. The level difference of between 0.90m to 1.40m is sufficient to ensure adequate
            grade for drainage of the proposed bio-retention devices.

            A drainage plan detailing proposed invert levels of pipes required to ensure adequate grade for drainage from
            stormwater treatment devices will be prepared and forwarded to Council as part the civil operational works
            application.

     15. The five shade trees proposed within the central bio-retention basin trench have now been excluded from the
         bio-retention system and provided with a suitable footprint for root establishment - refer to JFP Sketch
         Drawing M2383 SW.1 Revision F for details.




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