2008/0169 Response to information request - 71 Seaview Tce Sunshine Beach · 132008.169

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3.   Please provide the following additional sections:
     3.1.    an east west (approx.) section through spa/sauna, bed 2/ensuite and northern end of
             bed 1
     3.2.    a north west to south east, long section through the bedrooms to the northern pavilion
             and the living areas to the southern pavilion. This section should include the roof terrace.

Response:
The revised proposal plans in Attachment 1 include additional sections G and H through the requested
areas. These sections confirm that no part of the building will exceed a height of 8m from natural
ground level.

4.   The plans indicate structures such as retaining walls; contiguous piles and Uretek grout injection
     within the 3m western boundary setback. Pursuant to the Schedule to the Planning Scheme 8.10
     Building Setbacks all structures should be removed from the setback.

Response:
Section 8.10 requires buildings and structures in the Non-Urban Zone to be setback 3m from
boundaries other than road frontages. The proposal complies with this requirement. It is considered
that retaining walls do not fall under this provision, as evidenced by the numerous examples of
retaining walls throughout Noosa that are constructed within boundary setback areas. We note that a
retaining wall currently exists on the boundary line within the adjoining western property (Lot 5), with
a pool deck, about 3m above ground level, also built to the boundary. In any event the retaining wall
is predominantly setback 3m from the western boundary with the exception of a small tapered section
at the entry driveway in the south-western corner of the site. This is necessary due to site access
restrictions. The contiguous piles are below ground and are also setback a minimum 3m. While the
Uretek grout injection is within the 3m setback it is not a building or structure required to be setback
3m. The Uretek grout injection is below ground and will not be visible. It is used for the purpose of
land stabilisation and is not attached to any building or structure. The proposal complies with the
provisions of section 8.10 (and which even if they did not are relaxable under section 8.10.3) and
Councils application of these provisions with other developments.

Operational Works Assessment Branch

5.   The storm water plan proposes for the outflow from the storm water storage tanks to d&.harge via pipes
     kxated at a grade of approximately 1:2. There is concem that concentration of water will effectively increase
     flow volumes in the storm water outlet areas and may affect vegetation structure in these areas, in
     addition there is concern that insufficient scour protection and dissipation is provided at the outlets to
     ensure scour and erosion will not occur. Therefore, please advise the likely velocity of discharge from
     each outlet in a Q100 event, assess the impact of the likely velocity of storm water exiting the storm
     water systems on the stability of the site in a Q100 event and assess whether the proposed dissipation
     devices at the storm water outlets are appropriate to prevent scour.

Response:
A revised Site Based Stormwater Management Plan prepared by JF&P is included in Attachment 2.
This report assesses the likely velocity of discharge from each outlet in a Q100 event, assesses the
impact of the likely velocity of storm water exiting the storm water systems on the stability of the site
in a Q100 event and confirms that the proposed dissipation devices at the storm water outlets are
appropriate to prevent scour. Refer in particular to sections 3.7 (Management of Flows) and 4.8
(Flows Mitigated) and Figure 7.