RFI - Appendix C Traffic Engineering Report · MCU22/0038

Issue – Stormwater
The submitted documentation indicates that biobasin treated stormwater will “connect to the
basement drainage system for pump out to the external drainage system” and that “this is
required due to the high invert levels of the existing external stormwater network.”
The submitted documentation is unclear on:
     - how the water will be pumped from the basement into the lawful points of discharge;
     - the details of the proposed pump system (size, pipes, tanks, power supply, power
       redundancy, etc.);
     - the location of the proposed pumping system and the effect on carparking layout,
       including the proposed turn around area.
Information Required
5.      Provide amended plans detailing the proposed stormwater management system,
        including but not limited to:
        5.1. Location and dimensions of the proposed basement pump out system, including
             any required tanks, pipe sizes, etc.;
        5.2. How the basement pump out system will affect the proposed carparking
             arrangement and vehicle manoeuvring areas; and
        5.3. How the basement pump out system will be powered and what redundancy power
             arrangement/system will be put in place to ensure the basements won’t flood in
             case the principal system fails.
Issue
Technical review of Stormwater Management Plan
Contact has been made with several external hydraulic engineers seeking a review of the
submitted Stormwater Management Plan (SWMP). Due to the holiday period and existing
workloads, it has not been possible to engage a hydraulic engineer and the review of the
SWMP has not been completed. This will be resolved after the Easter break.
Information Required
6.      Information request items regarding the SWMP are to be provided shortly.
Issue
The submitted documentation (drawing “Stormwater Treatment Plan”, CP.1.01, Rev A,
prepared by MPN Consulting) indicates that the existing footpath, to the frontage of the subject
property, is to be removed and replaced with a new 1.8m wide one. The existing footpath is
2m wide.
Information Required
7.      Submit amended plans showing all proposed footpaths to be 2m wide.
Issue
Clause 5.3 HEADROOM of AS/NZS 2890.1:2004 requires that “the height between the floor
and an overhead obstruction shall be a minimum of 2200mm.”
The submitted Traffic Assessment Report indicates that the minimum height between the floor
and an overhead obstruction is approximately 1.7m (refer to snippet below).




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