RFI - Traffic Engineering Report

      •    Explain what structures will be present over the 600mm dia emergency relief pipe
           and how this pipe will be able to be accessed should maintenance or upgrade be
           required in the future
      •    Explain why a more conventional solution (eg conventional drainage and pipeless
           bioretention) could not be adopted for the site and would not present a lower-risk and
           lower-maintenance solution


Issue – Stormwater quality
Stormwater quality is not directly addressed in the SWMP - presumably on the basis that all
flows are infiltrated and hence ‘lost’. This does not recognise that groundwater is a receiving
environment and treatment is required prior to infiltration
Information Required
15. Provide an updated SWMP and preliminary engineering and layout plans which
    demonstrate that stormwater quality objectives are achieved prior to discharge to
    groundwater (i.e. prior to infiltration).


Issue – Grant/Banksia Roundabout Upgrade
Page 18 of TTM’s Traffic Engineering Report (22135916) dated 07 October 2022 details
design modifications of the existing Grant/Banksia roundabout and “Driveway Entry” into the
Resort. The submitted documentation does not contain sufficient information for Council to
assess the proposed Grant/Banksia roundabout upgrade and “Driveway Entry”.
Information Required
22.       Provide additional detail demonstrating the extent of the Grant/Banksia roundabout
          upgrade and proposed ‘Driveway Entry’ into the Resort. The detail must be prepared by
          a suitably qualified person (RPEQ – Registered Professional Engineer of Queensland)
          and include, but not be limited to:
          a. Demonstrate the extent of roadworks, including:
                 i.   design alterations to the roadway, traffic islands and roundabout island;
                 ii. signage; and
                 iii. line-marking.
          b. Demonstrate the extent of entrance works, including:
                 i.   demonstrate the design of the proposed “Driveway Entry” complies with
                      Noosa Council’s standard drawing RS-051;
                 ii. provide a longitudinal section extending from the centreline of the road
                     formation about the Grant/Banksia roundabout to the “Driveway/Setdown”
                     area;
                 iii. demonstrate B99 vehicle will not scrape or bottom out while entering and
                      exiting the proposed “Driveway Entry”;
                 iv. demonstrate additional stormwater runoff generated by the downward slope
                     of the proposed “Driveway Entry” will create a worsening of drainage
                     conditions within the road reserve and road network; and
                 v. demonstrate the required vegetation clearing.




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