and welcome to the February edition of “Keep Things Flowing”, the
monthly newsletter presented by Storm Water Consulting.
In this month’s
newsletter we review Gold Coast City Council’s recent policy updates
and new releases and we review some of the reports that we can
prepare to help with your development.
Gold Coast City
On the 2nd
of February Gold Coast City Council adopted the City Plan Version 2
document. The City Plan Version 2 document has two new additions which
affect the stormwater related aspects of development.
addition of a Flood Overlay Code;
Stormwater Quality Management Triggers;
Flood Overlay Code affects land with flooding or the potential to
flood. The purpose of the Flood Overlay Code is to ensure
development does not adversely impact flooding conditions and to
ensure safe and sustainable development. The new Flood Overlay Code
assessment criteria can be viewed at the link presented below:
Planning Policy (SPP) requires water quality objectives to be met
if a development was at least 2500m2. The new triggers
(in the City Plan document) for water quality treatment are based
on various factors including area, development type and development
layout. This potentially increases the number of developments that
are subject to meet water quality objectives.
Stormwater Quality Management Triggers can be viewed at the link
As well as
releasing a new City Plan, Gold Coast City Council also released a
new interactive mapping tool. The new interactive mapping tool features
updated aerial imagery, zoning and overlays on a larger display
than the previous mapping tool. The new interactive mapping system
can be viewed at: http://cityplanmaps.goldcoast.qld.gov.au/CityPlan/index.html
Consulting prepare many different types of stormwater reports to
support development. Some of the more common reports are summarized
is typically used to determine whether the stormwater or flooding
constraints associated with a property could prevent development.
If there is development potential then the approximate design
constraints will be identified. This type of report is useful for:
seeking information on properties with significant flooding issues
purchasers of flood affected properties
of flood affected properties
Flow Assessment Report
is typically used to identify the extent of overland flow
inundation across a property. The proposed development is modelled
to demonstrate that no adverse impact is created and finished
floor/lot levels are set. This type of report is useful for:
subject to overland flow inundation
experiencing frequent runoff from external areas
in low lying areas
Stormwater Management Plan Report
assesses flooding extent, stormwater quantity and stormwater quality
requirements, minimum finished floor level requirements and impacts
of development. This type of report is generally used for larger
projects. This type of report is useful for developments including:
Quality Assessment Report
is typically used to select a treatment train to meet water quality
objectives for a development. This type of report is useful for:
with a land area greater than 2500m2
with a use classed as "High Risk"
is typically used to determine the impact of development on a range
of flooding sources. Often properties are subject to several
sources of inundation and it must be demonstrated that development
would not create an adverse impact on neighbouring properties.
Sources of flood water include:
Overlay Code Assessment Report
is typically required when using a private certifier to approve a
development. This type of report is used when:
development is being approved by a private certifier
a Risk Smart Application
is a reasonably low level of flooding affecting the property
We hope you
enjoyed this edition of Keep Things Flowing. Feedback on articles
presented is always welcomed and for further information on any of
the articles presented please don’t hesitate to contact our office.
Keep Things Flowing!
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