John Forrest NP, Mogumber, Mundaring, Serpentine
In granitic soils, occasionally on laterite
Chidlow, east of Sawyers Valley, Mundaring
In grey-brown sand or lateritic gravel
Mundaring Weir, Dandalup, John Forrest NP
On sandy or loamy soils, around granite outcrops
Red Hill, Helena Valley, Gidgegannup, Jarrahdale
In peaty soils, swampy areas
Red Hill, Gosnells, Boyagin Rock
Skeletal gravel soils, granite outcrops & rocks, hillsides
Beechina, Wooroloo, Toodyay, Gingin
John Forrest NP, Walyunga, Darlington
Loam & sandy loam over granite, granite outcrops
Swan View, Wooroloo Brook, John Forrest NP
Gidgegannup, Bindoon, Julimar
Red-brown sand with laterite & gravel, sand over granite,
ridgetop plateau & assoc. breakaways
Gosnells to Gidgegannup, Crossman, Wandering
John Forrest NP, Bindoon, Wongamine
Red Hill, Lesmurdie NP, Helena Valley
Gravelly or sandy loam amongst granite outcrops
Two Rocks Chidlow, John Forrest NP
Gravelly loam-clay soils, among granite rocks
Thelymitra sp. Crystal Brook
Red Hill, Darling Range.
John Forrest NP, Brookton Hwy, Mt Lesuer
Gravelly loam or sand, low-lying damp areas, swamps
Preliminary Environmental Impact Assessment - Update
None of the Declared Rare or Priority species which were listed in 2002 were found
1 to 4 or the Truck Bay (GHD, 2002). Apart from at Passing lane 1, much of the road
reserve area has been previously cleared of its original native vegetation and is now
vegetated with opportunistic native species, species used in rehabilitation and/or
Habitat likely to support significant species listed in 2002 was thoroughly checked for
the presence of any individuals in these genera. Appendix D gives flora species
recorded during GHD’s site visit in 2002. The search included areas in the road
reserve likely to be impacted by the proposed passing lanes, and their immediate
A detailed field search for newly listed Declared Rare or Priority species was not
undertaken in 2005.
The majority of the road reserve impacted by the proposed works contains a significant
amount of introduced annual and perennial pasture species, due to past agricultural
practices. Some of these species are particularly invasive.
ATA Environmental conducted a weed survey of Passing Lane 1, and found a total of
28 weed species within the survey area (2004). One of the weeds identified was
Paterson’s Curse (Echium plantagineum), which is classified with a P1 category
throughout the state (Department of Agriculture, 2005). P1 prohibits the movement of
the plant and its seeds throughout the state. Four other weeds identified are weeds of
high environmental significance as defined in the Environmental Weed Strategy for
Freesia (Freesia sp). Weeds with a high rating:
Have a high level of invasiveness;
Are widely distributed or have a potentially wide distribution; and
Their presence results in environmental impacts including changing the structure
Passing Lane 2 has a high level of weed invasion as it has been previously cleared
and replanted with tree species. The understorey layer is predominantly pasture and
weed species. No Declared plants were recorded in the area of Passing Lane 2 but
environmental weeds such as African Lovegrass are present.
Passing Lane 4 also has weed species in some sections, with African Lovegrass
present within the roadside table drain. No Declared plants or other significant
environmental weeds were observed. Some of the area to be impacted is a gravely-
clay cut embankment, which has been rehabilitated with a range of native species and
which does not support any herbaceous weed species. However, two non-native
species have become naturalised in a limited area: Eucalyptus leucoxylon ssp. rosea,
a South Australian species which appears to have been accidentally introduced in the
drain area, and Hakea laurina, from the south coast of WA, which was possibly
Dieback disease (caused by the fungal pathogen Phytophthora cinnamomi) may be
present along parts of the road alignment.
Glevan Consulting undertook a dieback assessment of Passing Lane 1 and the Truck
Bay (2004). No visual evidence of dieback was recorded. One soil and tissue sample
was taken to assist in the assessment process, and returned a negative result.
Despite this result, the majority of vegetation on the verges of Toodyay Road in this
area is at risk of being infected with dieback.
The vegetation on Passing Lane 2 is almost entirely planted trees, some of which have
a low susceptibility to the disease. There is no evidence of dieback presence but the
area must be considered as uninterpretable, due to long-term disturbance.
One section of revegetation within the area of Passing Lane 4 has a number of young,
planted and seeded, individuals of Banksia grandis, which are particularly susceptible
to the disease. Some individuals of Banksia grandis were recorded as dead or dying
during the recent site visit on 7
July 2005 but it is believed that the deaths are more
number of other potentially susceptible plant species in the revegetation area are
healthy. Despite this, it is still possible that dieback is present along sections of
Passing Lane 4 as the area has been significantly altered and some sections are
A short visit to the Lilydale Road pit was undertaken by GHD in 2005, in order to
consider the risk of dieback spread from gravels in the pit area. Again, most of the
area of the pit is uninterpretable due to extensive disturbance and the lack of indicator
native plant species. The area above the pit still retains some native vegetation
although much of the understorey species have been removed by grazing. Any soil
from the pit area would be considered uninterpretable for Phytophthora infestation, due
to the disturbance and lack of hygiene controls for earthmoving over many years.
The fauna in the area near the western end of Toodyay Road was reviewed in Dell
(1983), and considerable work has been carried out in the John Forrest National Park
including a trapping survey in 1990/91 (CALM 1991). Trapping surveys have not
extended as far north as Passing Lanes 2 and 4 but the habitat along Toodyay Road is
similar. CALM’s rare fauna database was searched by GHD in 2005, the rare species
listed for the general area are given in Appendix A.
The conservation status of fauna species is assessed under State and Commonwealth
Acts; in particular the Western Australian Wildlife Conservation Act 1950; Wildlife
Conservation (Specially Protected Fauna) Notice 2003; and the Commonwealth
Environmental Protection and Biodiversity Conservation (EPBC) Act 1999. In addition,
to species with a formal gazetted conservation status, CALM also maintains a Priority
list of species that are restricted, vulnerable or too poorly known to be considered for
be considered. The taxon needs further survey and evaluation of conservation status
before consideration can be given to declaration as threatened fauna. These may be
trigger species in the Federal Environmental Protection and Biodiversity Conservation
From this specific information and other general information, the following species with
a classified conservation status may be present:
Schedule 1 (Fauna which is Rare or likely to become Extinct)
the northern and eastern parts of its range and tends to move south and to the coastal
belt when not breeding, where it feeds on native shrubs and trees (particularly
proteaceous species) as well as pine trees. It is threatened primarily by loss of tree
hollows for breeding, particularly in the wheatbelt area. This species is present as a
regular seasonal visitor, but there is only a small chance that it might breed in the
larger trees (Johnstone and Storr 1998). Recent studies on Carnaby’s Cockatoo have
indicated that it is known to breed in limited areas on the Swan Coastal Plain and,
potentially, in any trees with suitable hollows. It’s feeding habits have also developed
to include a number of garden species (John Dell, pers. comm. 2005).
dwelling species which feeds on the seeds of marri and other eucalypts. It is not
common and has declined due to destruction as a pest in orchards and possibly due to
competition for nest hollows, but appears to be secure since much of its forest habitat
is still available as native vegetation. This species is a regular seasonal visitor but
probably does not breed this far north (Storr, 1991).
the scarp but has declined greatly. It has increased with fox control but is still scarce
and present at low densities because individuals occupy very large areas. It would be
a resident species, but at a low density.
Species gazetted under the Wildlife Act in Schedule 4, which means "Other specially
Western Australia, but rare or threatened in some areas such as the wheatbelt, and is
partly gazetted to protect it from illegal capture and unnecessary killing. This is an
attractive python which is usually found under logs or rocks and may even be found
around human settlements (Wilson and Knowles 1988). It is often killed around human
settlements because it is mistaken for a large venomous snake. It is widespread but
scarce regionally, and would most likely be found on the granite or in logs. It is
probably a resident species but at a low density.
although uncommon species. It is seen occasionally throughout the South-West, but
prefers hills, cliffs, river edges and tall trees. This species was previously regarded as
threatened by egg-shell thinning due to pesticides, illegal hunting as a pest, and
been deleted from the latest national Action Plan for Australian Birds (Garnett and
Crowley 2000). In Western Australia this species is regarded as uncommon but
secure, and it is mainly gazetted to protect it from illegal capture. It would be present
as occasional birds hunting other birds from the taller trees, but there is only a low
chance that it would breed in the largest trees.
In addition to these species that have a formal gazetted conservation status, CALM
also maintains a Priority list of species that are restricted, vulnerable or too poorly
known to be considered for gazetting. These species have no special protection, but
their presence is normally considered.
Priority species, which could be expected to occur, are:
Brush-tailed Phascogale (Phascogale tapoatafa). This is a Priority 3 species. It is
a forest and woodland species that is still widespread but has declined greatly. It is
widespread in the scarp and forest area regionally. It is probably a resident species at
a low density.
defined as “Taxa in need of monitoring. Taxa which are considered to have been
adequately surveyed, or for which sufficient knowledge is available, and which are
considered not currently threatened or in need of special protection, but could be if
present circumstances change. These taxa are usually represented on conservation
lands”. This species is scarce regionally, and favours woodlands further east, and
particularly Wandoo. It is very scarce along the scarp and probably not resident, but
could be found in the Wandoo.
widespread in the forest as well as other areas including heath on the coastal plain,
woodlands and mallee in the south-east. It has declined in total but has recently
increased with fox control. It would be a resident species, but at low densities.
Priority 5 species. This species is common regionally but is now largely restricted to
dense vegetation in wet areas. It has declined in range and numbers, but still occurs
over a large area from north of Perth to Esperance. Its decline is mainly due to habitat
loss and predation by foxes, and many populations may now be isolated. It is now
found mainly in wetter areas because only these provide the dense vegetation, which it
requires for shelter from foxes. It is a prolific breeder and has probably been able to
survive because of the high production of juvenile animals. It is still relatively common
in the scarp valleys, but is rare in John Forrest National Park and probably does not
occur in the area of Passing Lanes 1, 2 and 4 because there is little suitable dense
Western False Pipistrelle (Falsistrellus mckenziei). This is a Priority 4 species. It is
primarily a forest bat but it does occur on the coastal plain as well. It is poorly known
but probably common and secure in forest areas. It is probably resident throughout the
Two bird species (Rainbow Bee-eater and Fork-tailed Swift) are protected under
Australia and require no specific management in Australia. There would be no impact
on these species regionally as they disperse widely.
John Forrest National Park in the vicinity of Red Hill is immediately adjacent to the
works area associated with Passing Lane 1 and the Truck Bay. This national park may
be indirectly impacted by proposed construction works. Direct construction impacts will
not occur as all proposed works are within the road reserve, which has mostly re-
established native and introduced species, and some remnant native species. Indirect
impacts include soil erosion, impacts to a tributary of Strelley Brook, introduction of
weeds, and spread of dieback. These aspects will need to be managed.
The vegetation corridor along Toodyay Road is part of a recommended Greenway
linking the lower Jane Brook-Whiteman Park with the Avon Valley National Park (Alan
Tingay and Associates, 1998). Greenways have been proposed to provide vegetated
corridors linking remnant bushland throughout the metropolitan area.
Greenways have no legislative status at present, however it is expected that efforts
should be made to consider their importance. Green corridors are not inconsistent with
vegetated road reserves and the two can easily be accommodated together.
A search of the Department of Indigenous Affairs database in 2005 indicates that no
archaeological or ethnographic sites have been recorded within the project area.
However, it is possible that sites do exist within the proposed work areas and detailed
field investigation would be required to verify their presence or absence.
Native Title Issues
A search was conducted by the National Native Title Tribunal in 2005 and the results
are presented in Table 2.
Table 2: Native Title Claims Covering Toodyay Road.
These claims both cover the entire area of the proposed works. These claims have not
regard to proposed works within the claim area.
Native Title is generally extinguished in areas where governments have built roads,
schools and undertaken other public works. Therefore, it is likely that Native Title has
been extinguished in this area. However, this is a legal issue and as such final
confirmation should be sought from a suitably qualified legal practitioner.
A search was conducted for European heritage sites utilising the databases of the
Commonwealth Department of the Environment and Heritage, the Western Australian
Heritage Council, the City of Swan and the Shire of Mundaring. The search indicated
only one European heritage site in the vicinity of the proposed roadworks. The Redhill
Convict Station is registered on the City of Swan heritage register and is in close
proximity to Passing Lane 1. The heritage database record for this site is shown at
The Convict Station is located on the northern side of the existing Toodyay Road,
adjacent to the John Forrest National Park, between Red Hill and the entrance to the
The Redhill Convict Station has been the subject of an Archaeological and
Architectural Report and Conservation Plan (undertaken by Bush et al (1996); and
Heritage and Conservation Professionals (1998). The Heritage Council of Western
Australia endorsed these documents.
The site remains extant only as a ruin. The Conservation Plan indicates that the area
adjacent to the northern side of Toodyay Road is regarded as having considerable
conservation significance. However, Passing Lane 1 will have no direct impact on this
Archaeological research indicates that the sites of the former oven and soak are
unable to provide exact locations. According to the diagrams included in the
Conservation Plan, Passing Lane 1 is likely to directly impact the area where the oven
is potentially located. It was recommended in the Conservation Plan that MRWA
should commission an archaeological investigation of the oven and well sites prior to
construction works. This is probably best done while the roadworks are being carried
out in case any evidence of the oven or well becomes apparent.
GHD consulted the Heritage Council of Western Australia, and despite endorsement
from the council in 1998, the proposed works will require the submission of a
Development Referral. The Referral should include a summary of the project, an
outline of the potential impacts and any research that has already been undertaken. A
representative of the Heritage Council indicated that, as the previous Conservation
Plan had been endorsed, the approval to develop would be relatively straightforward.