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Response to Further advice - 2023-01-11 RFI response · MCU22/0144
13th January 2023
Ref: MCU22/0144 OPW22/0207
Ms N Gorton
PO Box 141
Tewantin, QLD 4565
Attention: Nadine Gorton
Dear Ms Gorton,
Re: Information Request
At: 9 Kauri St, Cooroy QLD, 4563
With reference to the abovementioned development application and the subsequent
information request from Council, we have prepared a response to the engineering matters
raised as follows.
Retaining Walls & Footings
1. Provide additional comment by the designing engineering demonstrating that
the proposed Retaining Walls & Footings can be constructed wholly within the
subject site without adversely affecting the structural integrity of the
neighbouring properties (Lots 7 & 11 Kauri Street). The additional comment
must be certified by a suitably qualified person (RPEQ – Registered Professional
Engineer of Queensland).
The proposed retaining wall, subsoil drainage and footings, including any temporary and
permanent systems required during construction of the retaining wall are to be designed
and certified by the geotechnical and structural RPEQ engineer as part of the detailed
structural design. These systems – temporary and/or permanent – will be wholly contained
within the subject site’s property boundaries and will not adversely affect the structural
integrity neighbouring properties during installation (and/or removal, in the case of
temporary systems) as is typical for constrained infill developments.
Fall Prevention on Retaining Walls
2. Provide additional detail demonstrating what fall prevention, if any, is
being proposed for atop of the proposed retaining walls.
The driveway adjacent the southern retaining walls will be fitted with an integrated
barrier kerb built into the driveway slab to prevent vehicles falling of the elevated
driveway. A detail for the integrated kerb has been provided on drawing 51. In
addition, the landscaping along the southern boundary will act as a further deterrent.
The driveway drains to the central pits therefore drainage paths will not be impact
along the southern boundary. To the east of the southern visitor parking, a 200mm
gap in the barrier kerb will allow run-off from the driveway to drain to the bioretention
garden for treatment.
P +61 7 5211 1003 A 75 Noosa Dr, Noosa Heads Qld 4567 E [email protected] recorconsulting.com
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Vehicle Swept Paths
3. Provide additional Vehicle Swept Path Plans that demonstrate a B99 vehicle is
capable of entering the above Visitor Bays and Unit Carparks in a forward gear,
exit the space in a reverse gear and exit the site in a forward gear in a total of
3 movements without entering proposed landscaped areas or colliding with
features of the development (i.e. retaining walls). The additional plans must be
prepared by a suitably qualified person (RPEQ – Registered Professional
Engineer of Queensland).
The swept paths have been updated to ensure that the vehicle body does not pass
over landscaping areas nor retaining walls. Please refer to plans C60, C61 and C62.
Sustainable Building Design Code
4. Provide updated plans which incorporate rainwater collection and reuse at the
site, sufficient to supply external non-potable fixtures such as communal
landscape irrigation and bin washdown. The rainwater tanks should collect
roofwater only (not surface runoff) and be located within communal open
space areas of the site.
In accordance with the accepted outcome for the Sustainable Building Code, 3,000L
of rainwater reuse storage has been provided as a below ground storage tank,
nominally a Humes Rainvault RV3000-01-00 or equivalent. The maximum possible roof
area is to be directed to the tank, with downpipes fitted with first flush capture devices
to minimise pollutants being washed into the tank. The SWMP and design plans have
been updated to reflect this addition.
The rainwater reuse tank is to be plumbed to internal and external non-potable water
fixtures including external irrigation fixtures, internal toilets and laundry areas, and is
to be fitted with an automatic switching device to supply water when tank storage is
exhausted. Design of the roof drainage system and reuse pump and supply is to be
undertaken by the hydraulic consultant.
For further details on the other items of the information request, please refer to the town
planning response.
We believe that the above satisfactorily addresses the engineering matters raised in the
information request however, should additional information be required, please contact
our office directly.
Yours faithfully,
RECOR Pty Ltd
Prepared by
Ben Parry
Civil Engineer
BEng (Hons), MIEAust CPEng NER
RPEQ: 28084
P +61 7 5211 1003 A 75 Noosa Dr, Noosa Heads Qld 4567 E [email protected] recorconsulting.com
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