Bulk_20240820151717 (1).pdf

Noosa Council documents




                 Information Required
                 3.     Amend the design to reduce the appearance of bulk to more successfully respond to
                        PO8 of the Low Density Residential zone code (below).

                 PO8 Development:
                 a) is of a scale compatible with surrounding development and the particular circumstances
                    of the site;
                 b) has a low site impact to maximise the opportunity to retain site characteristics,
                    such as native vegetation and natural landforms;
                 c) allows the opportunity to provide soft landscaping between buildings;
                 d) does not present an appearance of bulk to adjacent properties, roads or other areas in
                    the vicinity of the site.


                 Issue – Location of Infiltration Trenches
                 Section 6.4 of Tectonic’s Geotechnical Investigation (24096-001-Rev0) dated 18 June 2024
                 recommends that roof water is discharged along Ross Crescent where physically possible
                 otherwise any infiltration occur at least 10m upslope of the rear boundary.
                 It is unclear from Westera Partners’ Stormwater Management Report if:
                        a.      the location of the two proposed infiltration trenches complies with the above
                                recommendation; or
                        b.      any roof water can be discharged into Council’s existing stormwater system along
                                Ross Crescent.
                 Information Required
                 4.     Provide confirmation by a suitably qualified representative of Westera Partners’ that:
                        a.      The location of the proposed infiltration trenches aligns with the recommendations
                                contained in Tectonic’s Geotechnical Investigation (24096-001-Rev0) dated 18
                                June 2024; and
                        b.      A meaningful area of roof water cannot reasonably be discharged into Council’s
                                existing stormwater system along Ross Crescent.


                 Issue – Increase in Fraction Impervious & Stormwater Capacity
                 Section 3 of Westera Partners’ Stormwater Management Report details that detention of
                 stormwater is not required despite the proposed increase in fraction impervious from ~16% to
                 ~37%. Insufficient detail has been provided to demonstrate that the proposed infiltration
                 trenches have sufficient capacity and the necessary infiltration rate to limit the post-
                 development peak flow from exceeding the pre-development peak flow during events up to
                 and including the DFE.
                 Council is concerned that the development may adversely alter the existing drainage regime
                 of the site and cause downstream nuisance by failing to disperse flow back to sheet flow if the
                 infiltration pit surcharges during events up to and including the DFE.
                 Information Required
                 5.     Provide additional detail by a suitably qualified representative of Westera Partners’ that
                        demonstrates:




                                                                                                           Page 3 of 5
Document Set ID: 23198100
Version: 3, Version Date: 20/08/2024                                                               Print Date: 20 August 2024, 3:17 PM


[OCR of page images]
Noosa Council documents

Information Required

3. | Amend the design to reduce the appearance of bulk to more successfully respond to
PO8 of the Low Density Residential zone code (below).

PO8 Development:
a) is ofascale compatible with surrounding development and the particular circumstances
of the site;

b) has alow site impact to maximise the opportunity to retain site characteristics,
such as native vegetation and natural landforms;

c) allows the opportunity to provide soft landscaping between buildings;

d) does not present an appearance of bulk to adjacent properties, roads or other areas in
the vicinity of the site.

Issue — Location of Infiltration Trenches

Section 6.4 of Tectonic’s Geotechnical Investigation (24096-001-Rev0O) dated 18 June 2024
recommends that roof water is discharged along Ross Crescent where physically possible
otherwise any infiltration occur at least 10m upslope of the rear boundary.

 

It is unclear from Westera Partners’ Stormwater Management Report if:

a. the location of the two proposed infiltration trenches complies with the above
recommendation; or

b. any roof water can be discharged into Council’s existing stormwater system along
Ross Crescent.

Information Required
4. Provide confirmation by a suitably qualified representative of Westera Partners’ that:

a. The location of the proposed infiltration trenches aligns with the recommendations
contained in Tectonic’s Geotechnical Investigation (24096-001-RevO) dated 18
June 2024; and

b. A meaningful area of roof water cannot reasonably be discharged into Council's
existing stormwater system along Ross Crescent.

Issue — Increase in Fraction Impervious & Stormwater Capacity

Section 3 of Westera Partners’ Stormwater Management Report details that detention of
stormwater is not required despite the proposed increase in fraction impervious from ~16% to
~37%. Insufficient detail has been provided to demonstrate that the proposed infiltration
trenches have sufficient capacity and the necessary infiltration rate to limit the post-
development peak flow from exceeding the pre-development peak flow during events up to
and including the DFE.

Council is concerned that the development may adversely alter the existing drainage regime
of the site and cause downstream nuisance by failing to disperse flow back to sheet flow if the
infiltration pit surcharges during events up to and including the DFE.

Information Required

5. Provide additional detail by a suitably qualified representative of Westera Partners’ that
demonstrates:

Document Set ID: 23198100 Page 3 of 5

Version: 3, Version Date: 20/08/2024 Print Date: 20 August 2024, 3:17 PM