Rfi - Scg 0469(L1)

                                                                                               SCG Consulting Engineers
                                                                                               ABN 68 669 675 790
27 June 2025
SCG Ref: 0469(L1)
                                                                                               Unit 1/11 Project Avenue,
By email: [email protected]                                                       Noosaville QLD 4566

                                                                                               P: 07 5455 5604
                                                                                               E: [email protected]
20 Williams St Developments P/L
C/- Pivotal Perspective Pty Ltd



Dear Sir

                               Re: MCU25/0057, OPW25/0078 and RAL25/0010
                              Lot 8 on RP72243, No. 9 George Street, Noosaville

We have reviewed Noosa Council’s request for information dated 20 June 2025 and provide our response to the
Engineering related items.

Issue 1 - Additional Ponding on Adjoining Properties:
    Provide additional detail to demonstrate compliance with Performance Outcome 10 (c) and (e) of the Flood
    Hazard Overlay Code. The additional detail must be prepared by a suitably qualified person (RPEQ).

Response:

In response to Council’s request for additional information regarding potential flooding and stormwater impacts
to the adjacent property at 7 George Street, we provide the following clarifications:

    •   The adjacent property at 7 George Street maintains positive surface grades towards its street frontage,
        ensuring that stormwater runoff from this site continues to drain to the lawful point of discharge (refer to
        the enclosed survey plan for confirmation).

    •   The subject development site at 9 George Street, Noosaville is not a lawful point of discharge for
        stormwater from 7 George Street. As such, there is no obligation for 9 George Street to receive or
        manage runoff originating from the neighbouring property.


    •   Any stormwater that may temporarily pond against the proposed retaining wall originates solely from the
        7 George Street property itself and is not redirected from, or impacting, any third party. As outlined in
        Section 3.03 of the Queensland Urban Drainage Manual (QUDM), the temporary ponding or retention of
        stormwater within a single property boundary does not constitute an adverse impact under the Code.

    •   The proposed retaining wall and associated filling works on 9 George Street have been designed to
        ensure no redirection, concentration or discharge of stormwater onto adjoining properties, thereby
        complying with PO10(c) and (e) of the Flood Hazard Overlay Code.

    •   From a legal standpoint, property owners are not obliged to accept overland flow or stormwater runoff
        from upslope neighbours, unless a lawful point of discharge exists. The proposed earthworks respect
        this principle and have been prepared accordingly to ensure there is no legal liability or drainage burden
        placed upon 9 George Street from adjoining lots.


Based on the above, we consider the proposed development at 9 George Street satisfies the relevant
performance outcomes of the Flood Hazard Overlay Code, and no adverse flooding or drainage impacts are
expected on adjoining properties.