Park Ridge Planning Report Part B

Environmental issues
5.2.1. Climate change
Climate change is acknowledged as the most serious and
wide spread environmental challenge to be dealt with on
the global agenda. Climate change is characterised by the
rapid and persistent alteration of climatic conditions such
as increasing atmospheric and sea temperatures, rising sea
levels and destabilising weather patterns. Specific impacts
of climate change that have been recently witnessed in SEQ
include prolonged drought conditions as summer rainfalls have
markedly decreased in frequency and duration. In response to
the emerging climate change challenge the land use plan will
need to implement a range of sustainable planning practices,
for example:
• Compact urban form that minimises impacts on natural
resources and environmental values and reduces the
need for travel by private vehicles;
• Buildings that are designed and oriented to take
advantage of the region’s climate and reduce the use of
energy, especially for cooling and heating;
• Low levels of water, energy and material consumption
and high levels of recycling and reuse of natural
resources, materials and waste products;
• Generation and distribution of energy from renewable
• Total water cycle management to minimise impacts on
the natural water cycle, including aquatic ecosystems;
• Protection from climate hazards, such as the recognition
at the strategic level of the problems caused by flooding
and the location of new development to ensure
development does not exacerbate flood risk.
5.2.3. Wildlife corridors
An objective of the land use plan is to enhance the
remaining core ecological values through the introduction
of environmental planning and management principles
and practises that focus on buffering and linking intact
habitats and rehabilitating degraded areas. The areas of
ecological value which remain in the Park Ridge SAA will
be subject to new pressures associated with the future
urbanisation of the Park Ridge SAA, including further
clearing and fragmentation, interface impacts, edge effects
and increased accessibility and human interference. Where
possible, the ecological areas will become public land
in order to ensure that their pressures can be effectively
managed for a variety of environmental, scenic and
recreational purposes.
A number of district wildlife corridors have been
identified within the Park Ridge SAA in a general northsouth orientation. They contain isolated and linked
nodes of woodland and wetland habitats as well as
disturbed woodlands that are generally suitable for
rehabilitation. These wildlife movement corridors share a
strong relationship with the broader regional landscape,
consolidating links with Karawatha Forest and the Berrinba
Wetlands to the north, the Munruben wetlands to the
south, and dispersed nodes of remnant vegetation of
Greenbank to the west.
The identification and protection of suitable wildlife
corridors is essential for the survival of the diverse fauna
species that inhabit the Park Ridge SAA and surrounding
areas. Failure to include wildlife corridors will force native
fauna to travel though urbanised areas, greatly increasing
the probability of vehicle strike or conflict with domestic
5.2.2. Natural values
The Park Ridge SAA covers 2548ha of semi rural and low
density residential uses. There are many areas within the
Park Ridge SAA which, according to the Logan Planning
Scheme and the Vegetation Management Act 1999 have
natural values that will constrain future development. Key
natural values include wetlands, waterways and associated
buffers, vegetation management areas, and the flood plain
management areas. Details on these constraints are provided
in the following sections.
Vegetation communities
Figure 18 Remnant Vegetation (VMA)
Source: Logan City Council
The Park Ridge SAA is recognised as containing a variety of
habitats and vegetation communities which, as a result of
historical land uses, are fragmented and mostly in poor to
medium condition. The existing vegetation is protected by the
Vegetation Management Act 1999 (VMA) and the Logan Planning
Scheme, Vegetation Management Area Overlay (Figure 18 and
Figure 19). As a consequence of Logan City Council undertaking
a remapping exercise of the Remnant Vegetation for the Park
Ridge SAA prior to the commencement of the structure planning
process, the remnant vegetation map is considered accurate. The
Logan Planning Scheme protects additional vegetation which
does not meet current state remnant vegetation criteria.
The Queensland Herbarium data, which is the basis of the VMA
mapping, identifies 493 ha of remnant vegetation within the Park
Ridge SAA as well as an additional 11,962ha within a 10km radius
surrounding the Park Ridge SAA. This includes National Parks,
conservation reserves and large quantities of land in private
Regional ecosystems
Eight Remnant Ecosystems (RE) communities, including subgroups, have been confirmed as occurring within the Park Ridge
SAA. The VMA lists the status of the eight RE’s confirmed as
occurring in the SAA as follows:
• Endangered Regional Ecosystem - 12.9-10.12 – Woodland
• Of Concern Regional Ecosystem - 12.3.11 – Open Forest
• Of Concern Regional Ecosystem - 12.9-10.7 – Woodland
• Not of Concern Regional Ecosystem - 12.3.5 – Open Forest
• Not of Concern Regional Ecosystem - 12.3.6 – Woodland
• Not of Concern Regional Ecosystem - 12.9-10.2 – Open
Forest (7ha);
• Not of Concern Regional Ecosystem - 12.9-10.4 – Woodland
(251ha); and
• Not of Concern Regional Ecosystem - 12.9-10.17 – Open
Forest (14ha).
Park Ridge Scheme Amendment Area (SAA)
Endangered (Dominant)
Endangered (Sub Dominant)
Of Concern (Dominant)
Of Concern (Sub Dominant)
Not of Concern
Figure 19 Vegetation Management Area - Logan Planning Scheme 2005
Source: Logan City Council
Park Ridge Scheme Amendment Area (SAA)
Districts 1-17 in the Vegetation Management Area
Balance Area District 18 in the Vegetation Management Area
District 19 in the Vegetation Management Area
(Endangered and Of Concern Remnant Vegetation)
Category 1 Land Sub District (All Plants)
Category 2 Land Sub District (All Significant Trees)
Mount Lindesay Highway District (Category 1 - All Plants & Category 2 - All Significant Trees)
Park Ridge District (Category 1 - All Plants & Category 2 - All Significant Trees)
Heritage Park District (All Plants)
Essential habitats
Most of the regional ecosystems mapped for the Park Ridge
SAA are recorded as providing essential habitat for endangered,
vulnerable or rare (EVR) wildlife species. However, this mapping
status is derived from EVR species being recorded within those
ecosystem types elsewhere in Queensland and as such must only
be considered as potential habitat. Tables 1 and 2 list the fauna
and flora that may utilise these ecosystems but EPA data shows
that only two species, the spotted-tail quoll and the koala have
been recorded within the Park Ridge SAA.
The Park Ridge Structure Plan will need to address the issue of
the potential to provide habitat for EVR species.
General habitats
Five key habitat types have been identified within the Park Ridge
SAA, including:
• Riparian woodland / wetland;
• Spotted gum – iron bark open forest;
• Gum – bloodwood open forest / woodland;
• Open forest complex with stringybarks, gums and
ironbarks; and
• Largely rural land and non-remnant vegetation.
This landscape matrix of woodlands, wetlands, open forests and
grasslands present within the Park Ridge SAA is a key component
of the broader regional landscape, providing visual relief and a
number of significant north-south wildlife corridors supporting
the movement of local fauna species.
The Scheme Amendments will need to protect core areas and
ensure that effective corridor linkages are established and
Table 1: Floral Species Listed by the Nature Conservation Act 1992 as Rare or Threatened.
Scientific Name
Common Name
NCA status
Arthaxon hispidus
Hairy-joint grass
Marsdenia coronata
Slender milkvine
Marsdenia longiloba
Clear milkvine
Choricarpia subargentea
Giant Ironwood
Corchorus cunninghamii
Native jute
Cupaniopsis shirleyana
Wedge-leaf tuckeroo
Cupaniopsis tomentella
Boonah tuckeroo
Eucalyptus curtisii
Plunket Mallee
Haloragis exalata subspecies venutina
Tall velevet sea-berry
Hydrocharis dubia
Leucopogon recurvisepalus
Persicaria elatior
Picris conyzoides
Prasophyllum exilis
Ricinocarpos speciosus
Sophora fraseri
Source: EPA 2008
5.2.5. Sensitive flora species
A review of online databases identifies a total of 64 EVR native
floral species that may occur within the broader regional
landscape. Of this total, 16 EVR native flora species are known
to occur within the Regional Ecosystems identified in the Park
Ridge SAA (Table 1). However, an EPA wildlife online search has
indicated that none of the EVR flora species have been recorded
within the Park Ridge SAA. This would primarily be due to the
fragmented and disturbed nature of the remnant vegetation and
other adjacent land management practices.
The Scheme Amendments identify and protect the most
important remnant vegetation and address the issue of corridors.
In so doing it will protect the ecosystems where sensitive flora
may occur as the ecosystems recover.
5.2.6. Sensitive fauna species
The Environment Protection Agency’s Wildlife Online database
was interrogated to provide an account of the terrestrial and
aquatic vertebrate species that may potentially utilise habitat
within the Park Ridge SAA and surrounding landscape. Of this
total, 30 EVR native fauna species have been recorded elsewhere
in the regional ecosystems which are identified for the Park Ridge
SAA and consequently may possibly occur within the area (Table
2). However, the EPA wildlife online system has official sightings
of only two species - Spotted-tail Quoll and the Koala. Given the
fragmented nature of the remnant vegetation and only a few
records of sightings it is expected that only individual animals of
both species would sporadically use the area. Whilst no records
exist for the other EVR species, it is reasonable to assume that the
more mobile species, such as the Powerful Owl, Grey Goshawk
and Glossy Black Cockatoo, would utilise the area occasionally.
Table 2: Fauna Species Listed by the Nature Conservation Act 1992 as Rare or Threatened
Scientific Name
Common Name
NCA Status
Crinia tinnula
Wallum Froglet
Litoria brevipalmata
Green-thighed Frog
Adelotus brevis
Tusked Frog
Litoria pearsoniana
Cascade Tree frog
Lophoictinia isura
Square Tailed Kite
Accipiter novaehollandiae
Grey Goshawk
Collocalia spodiopygius
White-rumped swiftlet
Stictonetta naevosa
Freckled Duck
Calyptorhynchus lathami
Glossy Black-Cockatoo
Ephippiorhynchus asiaticus
Black Necked Stork
Melithreptus gularis
Black-chinned honeyeater
Nettapus coromandelianus
Cotton pygmy-goose
Ninix strenua
Powerful owl
Lewinia pectoralis
Lewin's Rail
Rostratula australis
Australian painted snipe
Lathamus discolour
Swift parrot
Protecting a diverse representation of habitats within the SAA
and establishing wildlife corridors will assist with the long term
availability of habitat refuge, feeding, and breeding areas for some
of these EVR species.
Stipurus malachurus
Southern emu-wren
Dasyurus maculatus
Spotted-tail quoll
Phascolarctos cinereus
Pteropus policephalus
Grey-headed flying-fox
Potorous tridactylus
Long-nose potoroo
Chalinolobus dwyeri
Large-eared pied bat
Acanthophis antarcticus
Common Death Adder
The Wildlife Online database identifies 63 individual species as
EVR listed under the Environmental Protection and Biodiversity
Conservation Act 1999 (EPBC) and / or the Nature Conservation Act
1992. Of this total only 30 EVR native fauna species are known to
occur in the ecosystems present within the Park Ridge SAA (Table
New Koala planning provisions are planned to be introduced
in December 2009. The draft South East Queensland Koala
Conservation State Planning Regulatory Provisions (draft SPRP)
and proposed Koala habitat mapping are anticipated to regulate
new development in Koala areas.
Source: EPA 2008
Under the proposed SPRP approximately 75% of the site is
mapped as “Koala Protection Area 2” (KPA2) and 22% of the area
is mapped as “Koala Protection Area 3” (KPA3). Altogether, 97% of
the area is mapped.
been developed to deal with conflicts between remnant
environmental values and the pragmatic placement of certain
uses. The result is a consolidation of the small remnants into a
core area and corridor system, and the final network is funded
through offset provisions in the structure plan.
The new Koala provisions will therefore apply to Park Ridge.
However, the implementation of the Koala provisions will need
to take account of the planned Koala conservation for the area.
For Park Ridge, under the structure plan, an offset system has
A Draft Koala Conservation State Planning Policy, which will
assist local government to plan strategically for growth and
mange the impacts of growth on koala habitats is also planned
to take effect in mid 2010.
5.2.8. Waterways and wetlands
Figure 20 Waterways, Wetlands and Floodplains
Source: Logan City Council
The Park Ridge SAA contains eleven waterways which provide
key habitat refuges to both aquatic and terrestrial fauna and play
an important role in the natural water cycle (Figure 20).
The quality of urban runoff entering these waterways from
development of the Park Ridge SAA is of specific concern.
Urban runoff is potentially a major source of pollution that will
ultimately affect the health of the Park Ridge SAA’s waterways
and the Logan River. Future urban development in the Park
Ridge SAA will greatly increase the amount of impermeable
surfaces, effectively reducing opportunity for rainwater
The ecosystem health of waterways is monitored throughout
the region through the Ecosystem Health Monitoring Program
(EHMP). The program provides a comprehensive regional
assessment of waterway health in SEQ. This reporting on the
health of SEQ’s rivers, estuaries and Moreton Bay helps to inform
and shape management actions aimed at reducing pressures
on our catchments and waterways. The EHMP results provide
an assessment of the responses of aquatic ecosystems to both
natural pressures and human activities, including catchment
alterations, pollutant loads and management actions aimed
at improving and protecting aquatic ecosystems. Results of
the EHMP are reported annually via a scorecard for each major
waterway. Report Card grades are derived using a process that
includes the comparison of results with regional Ecosystem
Health Guidelines, and ranking of the resultant scores. The
impact of non-urban diffuse pollution on waterways varies in
intensity across South East Queensland. With the Logan River
score at D, it is essential the Park Ridge development does not
compound the problem further and where possible, improves
water quality.
In response, the scheme amendments incorporate Water
Sensitive Urban Design Principles for new development to
manage the quality, quantity and velocity of urban runoff
entering local waterways.
Maintaining riparian vegetation and vegetated buffers between
urban development and the Park Ridge SAA’s waterways will
ensure bank stability, maintain valuable wildlife habitats and
movement corridors and could potentially provide space for
passive recreational pursuits.
I 0.5
Scale: 1:30,000 @ A3
Park Ridge Scheme Amendment Area (SAA)
Flood Plain and Overland Management Area
5.2.9. Flood affected land
Land east of Chambers Flat Road is identified as forming part
of the Logan River flood plain and as such is subject to periodic
inundation during significant rainfall and tidal events (Figure
20). Similarly, lands adjacent to the many waterways through
the Park Ridge SAA are affected by Q100 overland flow flooding.
To minimise exposure to this flooding hazard, the scheme
amendments consolidate future urban development in areas that
have been determined free of Q100 flooding events.
5.2.10. Topography
Figure 21 Topography and Contours
Source: Logan City Council
The Logan Planning Scheme Steep Slope Overlay identifies areas
of land within Logan which contain a slope greater than 15%.
However, this overlay does not identify any areas within the
Park Ridge SAA. Hence, the Park Ridge SAA is topographically
unconstrained for urbanisation.
Figure 21 shows the topography and contours which clearly
shows the high ground and major ridge line.
Park Ridge Scheme Amendment Area (SAA)
Existing Roads
5m Contours
2.0581m AHD
AHD (metres)
83.4038 AHD
5.2.11. Views and visual character
The Park Ridge SAA has prominent views to the Scenic Rim in the
south as well as to Brisbane in the north (Figure 22). Similarly,
some elevated parts of the Park Ridge SAA form key views from
external locations (Figure 23). The land use plan will need to
• Protect and enhance existing desirable views;
• Maximise views from the Park Ridge SAA to the Scenic
Rim while maintaining the wooded character of the site’s
• Utilise a number of higher locations as key viewing points
/ nodes within the greenspace network by avoiding tree
removal where possible;
• Consider the visual “fit” and character of the southern part
of the Park Ridge SAA with the broader rural landscape
context to the south. For example maintain the mature
wooded character of the landscape where possible; and
Consider the areas of highest visibility in the site planning,
for example minimise visual intrusion of built form on high
ground by locating lower built form at a lower density in
visually prominent locations and maintain the tree cover to
retain the wooded ridgeline character. This is particularly
relevant to the southern flanks of the ridges where the
urban edge is transitioning to a semi rural character.
Figure 23 Inbound Views and Visual Character
Figure 22 Outbound Views and Visual Character
Park Ridge Scheme Amendment Area (SAA)
High Ground (above 65m+)
Key Views (Outbound)
Secondary Views (Outbound)
Internal Views
View Point
Major Ridgelines
Minor Ridgelines
Source: EDAW on behalf of Logan City Council
Park Ridge Scheme Amendment Area (SAA)
Potential Areas of High Visibility
Future Integrated Urban Edge
Future Exposed Urban Edge
Key Open Views into the Site
Filtered Views into the Site
View Points
Source: EDAW on behalf of Logan City Council
5.2.12. Bushfire hazard
Figure 24 Bushfire Hazard Areas
Source: Logan City Council
The Logan Planning Scheme identifies a number of lots as a
containing moderate risk of bushfire hazard (Figure 24). The
scheme amendments will need to ensure:
• The personal health and safety and property of the
community is protected from bushfire hazard in the
bushfire hazard area;
• The bushfire hazard area provides for a safe, efficient and
legible road network which mitigates against a bushfire
hazard; and
• Ecosystems and nature conservation values are protected
from bushfire hazard.
Park Ridge Scheme Amendment Area (SAA)
High Bushfire Hazard
Medium Bushfire Hazard
5.2.13. Potential acid sulfate soils
Figure 25 Acid Sulfate Soils
Source: Logan City Council
The eastern side of the Park Ridge SAA area contains an area
below 20m AHD and is potential acid sulfate soil (Figure 25).
These potential acid sulfate soils generally align with flooded
land and the planning outcomes have ensured that most of the
subject lands are not identified for development. If development
occurs within the remaining small areas of potential acid sulfate
soils, such development will need to ensure that infrastructure
is protected from the adverse impacts of development activities
that may disturb acid sulfate soils. Development will also need
to ensure that ecosystems, personal health and safety and
property are protected from the adverse effects associated with
the release of acid and metal contaminants from potential acid
sulfate soils, if disturbed.
Park Ridge Scheme Amendment Area (SAA)
Land above 5m and below 20m AHD
Land at 5m AHD and below
5.2.14. Noise
Figure 26 Noise Affected Areas
Source: Logan City Council
The Logan Planning Scheme identifies noise affected areas which
are generally located along the major road and rail areas within
and near the Park Ridge SAA (Figure 26). The Noise Affected Area
Code of the Planning Scheme is designed to protect and enhance
the personal health and safety of the community from noise
related to road transport activity and rail transport activity. The
Code provides noise attenuation measures which development
must address to prevent existing identified noise generating
areas causing negative amenity impacts on new development.
The issue of noise is considered in the Scheme Amendments. In
addition, the Noise Affected Areas will need to be amended to
accommodate proposed major roads.
Park Ridge Scheme Amendment Area (SAA)
Noise Affected Areas