Response to Council IR PLAYGROUND

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Item 3: Update all flood mapping figures to show the extent of the car parking works on all
figures.

Applicant’s Response to Item 3: The carpark proposed under MCU20/0012 has been relocated to be totally
contained within Lot 5 on SP213104. This carpark is above the DFE and has been excluded from the flood
assessment.


Item 4: Provide a topographic differences plot so the extent of earthworks for the park and the
car parking can be clearly understood

Applicant’s Response to Item 4: Please refer to Attachment A which provides a Flood Assessment for the
proposal. A topography difference map is provided on Image 4-2 of the report and there are no
differences associated with the carpark because it is situated on land currently above the DFE.


Item 5: Clarify the level of flood immunity achieved for proposed facilities and infrastructure
such as toilets, shelters, bbqs.

Applicant’s Response to Item 5: Please refer to Attachment A which provides a Flood Assessment for the
proposal prepared by Hydrology and Water Management Consulting. The report indicates that cross sections
through the site are shown on Image 7-4 which show proposed case ground levels along with design
flood levels. Design flood levels are shown on Image 7-3 at key locations.


Item 6: Provide further advice on the consequences of the predicted flood impacts to the
Council-owned land at 4-8 Lower Mill Rd. Although owned by Council, this land contains tenants
which may be affected by the predicted flood impacts. Either eliminate the flood impacts from
this parcel or justify why the consequences of these impacts should be acceptable. In the
response, provide surveyed floor levels for each of the tenancies and specifically comments on
the existing flood immunity of the tenancies and whether the development will increase over-
floor flooding (either frequency of occurrence or depths).

Applicant’s Response to Item 6: Please refer to Attachment A which provides a Flood Assessment for the
proposal prepared by Hydrology and Water Management Consulting. The report indicates that there is no
over-floor flooding of the buildings.


Item 7: Demonstrate that the development is resilient to natural hazard events by ensuring siting
and design accounts for and minimises potential risks of natural hazards to people and property.
In this regard, clearly demonstrate how the proposed design and materials minimise potential
risks of natural hazards to people and property.

Applicant’s Response to Item 7: Please refer to Attachment B and C which provide a summary of design
changes proposed. The changes include:

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               Garden beds mulched with rock around flood prone areas of the site
               Floor levels of toilet blocks are above flood level
               Buildings to be constructed out of materials that will not be damaged by flood water and
                can be easily washed down including concrete walks, stainless steel elements,
                galvanised iron features and oversized hardwood.
               Elevated accessible bridge
               Removal of mounding along Maple Street
               Removal of lookouts to creek
               Reduced surface levels along creek.


Item 8: Provide flood inundation and flood impact mapping for the local flood event associated
with the external urban catchment which flows through the site.

Applicant’s Response to Item 8: Please refer to Attachment A which provides a Flood Assessment for the
proposal prepared by Hydrology and Water Management Consulting.


Item 9: Provide plans/information to indicate the relevant levels of proposed plumbing works
associated with toilet block and clearly specify the measures to prevent any potential of sewer
surcharge during major storm events (1% AEP and over).

Applicant’s Response to Item 9: Please refer to Attachment A which provides a Flood Assessment for the
proposal prepared by Hydrology and Water Management Consulting. The report indicates that Design flood
levels at each of the shelter areas and amenities are provided on Image 7-3. These can be placed onto
relevant plans to describe the immunity of these structures.




Item 10:        Update plan where required.

Applicant’s Response to Item 10: Please refer to Attachment B and C which provides plans
summarising the changes to the design.

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Item 11: Demonstrate the suitability of the pedestrian path across the creek to the car park in the
event of a flood event.

Applicant’s Response to Item 11: Please refer to Attachment A which provides a Flood Assessment for
the proposal prepared by Hydrology and Water Management Consulting. The report details that the
pedestrian path across the creek to the northern carpark will not be safe to use during times of flooding
and that signage on both sides of the creek should be used to warn people against crossing the creek
during times of flooding. The report details that signage should also direct persons to the alternative
access which is via the pedestrian bridge on Maple Street.

The applicant advises that the playground will be fully fences to minimise accidental access to the area
by children and reducing risks and use during flood events.


Item 12: Demonstrate that the access path over the creek meets the relevant Australian
Standards.

Applicant’s Response to Item 12: Please refer to Attachment A which provides a Flood Assessment for
the proposal prepared by Hydrology and Water Management Consulting. The report advises that the existing
pedestrian access path across the creek will not be safe to use during times of flooding and that signage
on both sides of the creek should be used to warn people against crossing the creek during times of
flooding. Signage should also direct persons to the alternative access which is via the pedestrian bridge
on Maple Street.


Item 13: Update the park design sections to include design flood levels on each section.
Specifically identify the proposed level of flood immunity for facilities and infrastructure such as
toilets, shelters, bbqs etc.

Applicant’s Response to Item 13: Please refer to Attachment A which provides a Flood Assessment for
the proposal prepared by Hydrology and Water Management Consulting. The report indicates that flood levels
provided in this report can be used to update architectural plans as required. Attachment B and C
provide plans of the recommended changes.


Item 14: Demonstrate how proposed installations and furniture in the park (eg wooden
structures, logs, trash/garbage bins) will not be dislodged in a flood event and cause blockage
or impede flows through downstream culvert/s and or floodway.

Applicant’s Response to Item 14: Please refer to Attachment A which provides a Flood Assessment for
the proposal prepared by Hydrology and Water Management Consulting.

The applicant adviser that the design theme of the park is ‘overgrown industry vs. nature’ and includes
oversized and over strength materials. These oversized members will be founded with structurally designed
footings, resistant to the predicted floodwater velocities. This applies to the play structures (which are naturally
robust due to the high lateral loads placed on them), shelters, seats / tables and bins. Other considerations
include:
       • Where possible bins will be located in elevated locations to avoid rubbish loss.
       • Much of the seating located in low laying areas are large placed rocks, which will have no
       • The planting of the park is has considered the possibility of flooding and replicates may of the
         plant species found in riparian zones. It is anticipated that the landscaped areas from this park
         would create less obstructions than natural riparian landscapes as dead trees and fallen limbs
         will be maintained.
       • Perimeter “pool style” fencing adjacent to the riparian zone will require a release hinge to
         ensure the fencing does not get knocked over in a major event.

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Item 15: Revise the design for the management of the external urban catchment which flows
through the site so that recreation and access is consistent with the anticipated water quality. It
is suggested that a densely vegetated ephemeral swale (which restricts access and is free-
draining) is a more appropriate outcome.

Applicant’s Response to Item 15: Please refer to Attachment D which provides correspondence from
Callaghan and Toth in response to the above item.


Item 16: Provide traffic assessment prepared by suitably qualified RPEQ to address the impact
of the development on the traffic in Maple Street, Mary River Road and Cooroy CBD. Update
plans where required.

Applicant’s Response to Item 16: Please refer to Attachment G which provides a traffic assessment of the
proposal.


Item 17: Clearly demonstrate how the proposed playground meets the Biodiversity Overlay Code
for the Riparian Buffer Area, in particular Specific Outcome 5.

Applicant’s Response to Item 17: Please refer to Attachment D and E which provides correspondence
from Callaghan and Toth in response to the above item.


Item 18: Demonstrate that there is an overall improvement to the water quality outcomes
associated with the site by conserving, managing, enhancing and rehabilitating the ecosystem
health and quality of stormwater entering receiving waters. In this regard, it is noted that water
quality outcomes for the car parking within the Maple Street road reserve has not been
addressed.

Applicant’s Response to Item 18: Please refer to Attachment D and Attachment F which provides
correspondence from Callaghan and Toth in response to the above item.


Item 19: Clarify if and where viewing platforms are proposed. Where they are proposed
demonstrate no adverse impacts on the environmental values of the riparian buffer area.

Applicant’s Response to Item 19: Please refer to Attachment D which provides correspondence from
Callaghan and Toth in response to the above item. Viewing platforms are to be removed.


Item 20: Demonstrate how the values of the riparian buffer area will be maintained and enhanced
through the remediation process.

Applicant’s Response to Item 20: Please refer to Attachment D and Attachment H which provides
correspondence from Callaghan and Toth in response to the above item. No clearing of riparian vegetation
proposed.


Item 21: Provide information from a suitably qualified health professional about the suitability of
the site for a playground with respect to the proposed usage of the site as a children’s
playground and the historic use of the land. Consideration of site excavations, soil loading and
long term usage by children and other vulnerable users should be presented. In this regard, the
qualified health professional’s response should make reference to the two reports prepared by
Core Consultant’s (March and December 2019).

Applicant’s Response to Item 21: Please refer to Attachment D which provides correspondence from
Callaghan and Toth in response to the above item. Attachment H provides a copy of Core Consultants report
on the proposal and site conditions. Attachment I and J include copies of the previous Core reports as
requested

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Item 22: Provide copies of the two reports prepared by Core Consultant’s (March and December
2019) referenced in the Stormwater Management Plan.

Applicant’s Response to Item 22: Please refer to Attachment I and J.


Item 23: Provide information regarding the likelihood of the Maple Street road reserve containing
traces of chemicals associated with previous uses of the site.

Applicant’s Response to Item 23: Please refer to Attachment D which provides correspondence from
Callaghan and Toth in response to the above item. Attachment H provides a copy of Core Consultants report.


The applicant considers that they have now responded to Council’s information request. The decision period
has now commenced and we request that Council continues with assessment of the application.

Please contact our Sunshine Coast office if you require any further information and/or clarification.




Yours faithfully,




Nadine Gorton
Senior Planner
martoo consulting pty ltd


CC:
SARA at DILGP