Garden Street road extension, Huntingdale EPBC Act ... · the impacts to the Banksia woodland...

Garden Street road extension, Huntingdale EPBC Act reference: 2016/7735

Further information provided by the City of Gosnells to the

Department of the Environment and Energy in relation to the

EPBC referral documents

Sent 8 December 2016

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ATTACHMENT 1

Table of Comments and Responses


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No. Comment from the Department of the Environment and Energy Response

Listed threatened species and ecological communities

1 The Department is aware that previous records of the King spider-orchid (Caladenia huegelii) and Glossy-leafed Hammer-orchid (Drakaea elastica) occur within the Holmes Street Bushland Site No. 125. The Department also notes that Population 44 (Huntingdale) listed in the summary of population information and threats table of the Grand spider orchid (Caladenia huegelii) recovery plan (http://www.environment.gov.au/cgi-bin/sprat/public/publicspecies.pl?taxon id=73 09), may occur in proximity to the proposed site.

It is noted that these species may not flower yearly and that the unprecedented low rainfall in 2015 may have impacted the flowering pattern of the orchid resulting in these species not being detected during surveying. Recent climatic records indicate this year has received higher rainfall and it is therefore more likely that orchids will be detected during this (2016) spring flowering season.

Please provide the results of additional surveys demonstrating the presence/absence of King spider-orchid (Caladenia huegelii) and Glossy-leafed Hammer-orchid (Drakaea elastica) and additional information regarding whether direct/indirect impacts on these populations will occur as a result of the proposed action. This should include a discussion of the following potential impacts:

weed invasion

habitat degradation

land clearing

disturbance from construction and/or maintenance

changes in hydrology and salinity

The City of Gosnells commissioned PGV Environmental to undertake a targeted survey for these species of orchids in 2016. The Survey was conducted at an appropriate time of year to identify King Spider Orchids (Caladenia huegelii) (Attachment 2, Appendix 1) and Glossy-leafed Hammer Orchids (Drakaea elastica). The results of the survey are Attachment 2. Population 44 is listed in the Recovery Plan as a significant population and is located on 103 Gray Street, which is not within the site. Population 37B is also listed in the Recovery Plan and has been recorded in the vicinity of the site. The Recovery Plan states the population had 15 plants in 1997 and none in 2003 or 2004.

PGV Environmental has a reference site of King Spider Orchid (Caladenia huegelii) which is surveyed every year recording the number of known plants that re-emerge and the timing of flowering. In 2015 90% of known individuals were recorded as flowering 2015 (Attachment 3) indicating that flowering did occur in that season. In 2016 flowering occurred between 12 September and 11 October 2016 (Attachment 2, Appendix 1) indicating the timing in 2016 for the survey was appropriate.

No populations of listed flora have been recorded in the three spring surveys in 2014 (Attachment 4), 2015 (provided in Referral documentation) or 2016 (Attachment 2) in the road reserve. As a result there will be no direct impacts on these species. Indirect impacts on adjacent native vegetation are addressed below:

The proposed road will have a planted verge that will be managed by the City of Gosnells (Attachment 5 and 6).

The planted verge will utilise species that are non-invasive and will be maintained to minimise weed vectors into the surrounding bushland.


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The surrounding habitat is already protected in a Bush Forever Site and will not be cleared.

The construction of the road will be managed to ensure that there is no clearing outside of the road reserve

The hydrological management is outlined in Attachment 6.

2 The Department considers that previous records of the Purdie's Donkey-

orchid (Diuris purdiei) exist in close proximity to the proposed action. The

referral documentation states that fire occurred some years ago on the

proposed site, the Department therefore considers that it was unlikely that

the Purdie's Donkey-orchid was flowering during the October 2015 flora

survey as fire triggers flowering in this species.

Given the above please provide detailed information on the previous

records of this species in proximity to the proposed site and the likelihood

that the proposed action would result in direct/indirect impacts to any

population of this species that may occur on or in the vicinity of the

proposed action. This should include a discussion of the following potential

impacts:

weed invasion

habitat degradation

land clearing

disturbance from construction and/or maintenance

The 2016 Targeted Survey did not record any Diuris purdiei in the road reserve (Attachment 2), however the vegetation remains unburnt over a number of years. A thorough search of database records shows a record in the Bush Forever site located to the north-west of the road alignment with a separation distance of approximately 600m.

The proposed road is highly unlikely to impact on this population Diuris purdiei, either directly or indirectly.

The proposed road will have a planted edge that will be managed by the City of Gosnells (Attachment 5 and 6). The planted edge will utilise species that are non-invasive and the edge will be maintained to minimise weed vectors into the surrounding bushland. The habitat for Diuris purdiei is already protected in a Bush Forever Site and there will be no clearing within 600m of the recorded location of the population. The construction of the road will be managed to ensure that there is no clearing outside of the road reserve.


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3 Please clarify whether targeted surveys for the following species were

carried out within and immediately surrounding the proposal site to

determine their likely presence or absence, and if so, please provide

further information demonstrating that the surveys were consistent with

the Department's relevant survey guidelines and the survey guidance

provided for the species in the Department's Species Profile and Threats

Database (SPRAT).

Dwarf Bee-orchid (Diuris micrantha) — vulnerable

Dwarf Hammer-orchid (Drakaea micrantha) — vulnerable

Beaked Lepidosperma (Lepidosperma rostratum) — endangered

Australasian Bittern (Botaurus poiciloptilus) — endangered

If the surveys conducted were not consistent with the Department's

guidelines and the survey guidance in SPRAT you will need to conduct and

provide the results of additional surveys to confirm the presence/absence

of the above species.

Targeted surveys for species on this list have been conducted (Attachment 2) and no species listed was located on the site.

The surveys are consistent with DotEE advice and guidelines where available, and in the case of the orchids exceeded the coverage required. Please note the Interim Recovery Plan for the Beaked Lepidosperma is not available.

4 All survey's should be conducted in accordance with the Departments

relevant survey guidelines and the survey guidance in SPRAT for each

species, including but not limited to the:

Draft Survey Guidelines for Australia's Threatened Orchids

available at http://www.environmentspv.au/resource/

draft-survey-guidelines-australias-threatened-orchids

Survey guidelines for Australia's threatened birds available at

http://www.environment.qov.au/resource/survey-guidelines-

australias-threatened-birds-quidelines-detecting-birds-listed-

threatened

Species Profile and Threats Database available at

http://www.environment.gov.au/cqi-bin/sprat/public/sprat.pl

As outlined in Attachment 2 the surveys were conducted in accordance with the designated guidance material.

http://www.environmentspv.au/resource/draft-survey-guidelines-australias-threatened-orchids

http://www.environmentspv.au/resource/draft-survey-guidelines-australias-threatened-orchids

http://www.environment.qov.au/resource/survey-guidelines-australias-threatened-birds-quidelines-detecting-birds-listed-threatened



http://www.environment.gov.au/cqi-bin/sprat/public/sprat.pl


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5 After all avoidance measures have been established, please provide further

details on any mitigation measures that the City of Gosnells propose to

implement prior to, during and post construction to manage the potential

direct and indirect impacts on the above EPBC Act listed species.

Specifically consider:

potential hydrological changes (e.g. modified runoff, soil erosion,

salinity, increased sedimentation) and spread of weeds in

particular considering any potential impacts to the conservation

wetland and consequently threatened orchids which have the

potential to be located onsite.

spread of Phytophthora cinnamomi (dieback) in particular consider

the impacts to the Banksia woodland located on the proposed site

and the potential mitigation of the indirect impacts highlighted in

the referral documentation. In providing this response you should

consider the potential impact to habitat for the Carnaby's Black-

Cockatoo (Calyptorhynchus latirostris).

The mitigation measures proposed by the City of Gosnells are outlined in Attachment 6.

6 In the event that impacts cannot be avoided or mitigated, please provide

further details on any offset/s to compensate for any residual significant

impacts on EPBC Act listed species, including:

the type of offset/s proposed

extent to which the proposed offset actions correlate to, and adequately compensate for, EPBC Act listed species

suitability of the location of any proposed offset site for EPBC Act listed species

conservation gain to be achieved by the offset i.e. positive management strategies that improve the site or averting the future loss, degradation or damage of the protected matter

time it will take to achieve the proposed conservation gain

The impact of the proposed road will not be significant on any Matter of National Environmental Significance. The clearing of one potential breeding tree will be mitigated by the installation of three cockatubes in an appropriate location in the City of Gosnells.


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level of certainty that the proposed offset will be successful

current land tenure of any proposed offset and the method of securing and managing the offset for the life of the impact.

7 Demonstrate how the proposed action is consistent with the Environment Protection and Biodiversity Conservation Act 1999 Environmental Offsets Policy (October 2012).

The proposed mitigation is in proportion with the low level of impact.


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8 Demonstrate that the action is not inconsistent with any relevant recovery plan or threat abatement plan including but not limited to:

Grand Spider Orchid (Caladenia huegelii) Recovery Plan, Western Australia Department of Environment and Conservation, 2009

National recovery plan for the Glossy-leafed Hammer Orchid (Drakaea elastica), Department of Environment and Conservation, 2009

Carnaby's Cockatoo (Calyptorhynchus latirostris) Recovery Plan, Western Australia Department of Parks and Wildlife, 2013

Australian Government Department of the Environment (2014), Threat abatement plan for disease in natural ecosystems caused by Phytophthora cinnamomi

Threat abatement plan for competition and land degradation by rabbits, Department of the Environment, Water, Heritage and the Arts, 2008

Threat abatement plan for predation by feral cats, Department of the Environment, 2015

Threat Abatement Plan for Predation by the European Red Fox, Department of the Environment, Water, Heritage and the Arts, 2008

It is highly unlikely that Caladenia huegelii or Drakaea elastica are present within the road reserve and therefore the proposed construction of the road will not be at variance to the Recovery Plans.

The proposed road will result in the clearing of 4.58ha of vegetation containing foraging habitat and one potential breeding tree. Under the Significant Impact guidelines this is not considered to be a significant impact at variance to the recovery plan.

The Dieback survey by Glevan Consulting shows most of the surrounding bushland as infested with Dieback with small areas that are not. A Dieback Management Plan will be prepared outlining appropriate hygiene protocols during construction and management of stormwater to ensure the disease is not transmitted through run-off. This will minimise the risk of spread, in alignment with the Threat Abatement Plan (TAP).

The road will not provide habitat for rabbits and the control of rabbits in the surrounding Bush Forever site will be undertaken by the City of Gosnells if required therefore in accordance with the TAP the proposed road will not increase land degradation by increasing the population of rabbits in the surrounding area. The current release in Western Australia of the Calicivirus is likely to keep numbers down.

The construction of the road will not increase the risk of feral cats in the area and is not considered to be at variance with the TAP.

The area surrounding the site is urbanised and the European fox is not likely to increase due to the construction of the proposed road. The control of foxes in the surrounding Bush Forever site if required will be undertaken by the City of Gosnells.


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Economic and Social Factors

9 Please provide further detail on the social and economic costs and/or benefits of undertaking the proposed action, including:

basis for any estimations of costs and/or benefits

potential employment opportunities expected to be generated at each phase of the proposed action

details of any public and stakeholder consultation activities, including the outcomes.

The proposed Garden Street extension between Harpenden Street and Southern River Road will be a key arterial road serving both regional and local traffic in the Southern River area. The proposed road reservation for Garden Street was endorsed by a Metropolitan Regional Scheme (MRS) Amendment in 2000 administered by the Western Australian Planning Commission. The section of the road corridor between Harpenden Street and Balfour Street is located within the Holmes Street bush land area. It is proposed that Garden Street will eventually be extended up to the Tonkin Highway aligned with the programmed transport planning for the Southern River development area.

Traffic: Main Roads Western Australia’s traffic model forecasts anticipate a traffic volume of 20,000 between Warton Road and Balfour Street by 2031. It is expected that Garden Street will progressively be extended from Harpenden Street to Tonkin Highway making a significant 4-lane arterial road link between the Roe and Tonkin Highways. Land developments around the proposed stage of works, between Harpenden and Balfour Streets, have already been completed/ commenced so that neighbourhood connector roads such as Harpenden Street and Holmes Street, the section between Harpenden and Balfour, are not capable of taking such a huge volume of traffic through residential areas. So the proposed road will effectively take traffic away from neighbourhood connectors in addition to through regional traffic (Attachment 7).

Benefits:

General transportation benefits by construction of a new arterial road link.


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Travel time cost savings: It has been assessed that there will be $21 million PV (Present Value) travel time cost savings over a 30 year time period. Relevant pages from analysis based on Metropolitan Regional Road Group Guidelines for the Submission of Road Improvement Projects attached.

Reduce vehicle operating costs lowering CO2 costs. It has been assessed that there will be $8 million vehicle operation cost savings over a 30 year period.

Reduce traffic crash costs – The proposed dual carriageway, with two lanes in each direction, separated by a median strip, will significantly reduce head-on crashes and also minimise rear end and side swipe crashes.

Benefits to pedestrians and cyclists- the proposed carriageway design provides on-road cycle lanes and shared paths on either directions. This will also improve the safety of cyclists and pedestrians.

Employment opportunities:

It is expected that the proposed section of road will cost $ 4 Million to construct with potential employment in following categories during a 1 year construction period:

Direct employment of 15 full time people, includes plant operators, truck drivers, work crew, supervisors and survey crew, for earthworks, road pavement and drainage works.

Indirect employment for supplying and laying 650 m3 of concrete paving and kerbing, 2000 tonnes of asphalt and street light installations.

Indirect employment involving supplying, laying and compaction of 8500 m3 of pavement materials


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Also the employment of five part time personnel for investigation, design and project management.

Details of any public consultation:

Amendments to the planning schemes in 2000, when the Metropolitan Region Scheme that designated the site as a road, with the appropriate zoning, by the Department of Planning, WA, underwent public consultation and submission periods at that time. As stated in the referral, the Clearing Permit Application will also have a public submission period. Before any construction commences, the City will conduct local public consultation.

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ATTACHMENT 2

Targeted Survey Report 2016

GARDEN STREET, SOUTH ERN RIVER

TARGETED CONSERVATION SIGNIFICANT SPECIES SURVEY

Prepared for: City of Gosnells

Report Date: 28 November 2016

Version: 3

Report No. 2016-290

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Contents

Contents ............................................................................................................................................................. i

List of Attachments ........................................................................................................................................... ii

1 INTRODUCTION ......................................................................................................................................... 1

1.1 Background ........................................................................................................................................ 1

1.2 Scope of Works .................................................................................................................................. 1

2 TARGETED SPECIES .................................................................................................................................... 3

2.1 Grand Spider Orchid .......................................................................................................................... 3

2.2 Purdie’s Donkey Orchid ..................................................................................................................... 3

2.3 Dwarf Bee Orchid .............................................................................................................................. 3

2.4 Glossy-leafed Hammer Orchid .......................................................................................................... 3

2.5 Dwarf Hammer Orchid ...................................................................................................................... 3

2.6 Beaked Lepidosperma ....................................................................................................................... 4

2.7 Australasian Bittern ........................................................................................................................... 4

3 METHODOLOGY ......................................................................................................................................... 5

3.1 Review of Previous Studies ............................................................................................................... 5

3.2 Targeted Flora Species Survey........................................................................................................... 5

Site Survey ................................................................................................................................. 5

Timing ........................................................................................................................................ 5

3.3 Targeted Search for the Australasian Bittern .................................................................................... 6

4 RESULTS ..................................................................................................................................................... 7

4.1 Previous Surveys ................................................................................................................................ 7

4.2 Seasonal Conditions .......................................................................................................................... 7

4.3 Flora Species ...................................................................................................................................... 8

4.4 Australasian Bittern ........................................................................................................................... 9

5 CONCLUSION ........................................................................................................................................... 10

6 REFERENCES ............................................................................................................................................ 11

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List of Attachments

Tables

Table 1: Relevant Timing and Guidance

Table 2: Flowering Period and Recognisability

Appendices

Appendix 1: Caladenia huegelii File Note

Appendix 2: Australasian Bittern Survey

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1 INTRODUCTION

1.1 Background

The City of Gosnells has proposed to extend Garden Street 0.8km from Harpenden Street to the

intersection of Balfour and Holmes Streets (the site). The proposed construction will require the

clearing of 4.35ha of native vegetation.

The proposed extension of the street was referred on 3 July 2016 under the Environment Protection

and Biodiversity Conservation Act 1999 (EPBC Act) (EPBC 2016/7735) and was determined to be a

‘Controlled Action’ on 11 August 2016. The Department of the Environment and Energy (DotEE)

determined eight matters listed under Section 18 and 18A of the Act that could be significantly

impacted by the action which were:

Grand spider orchid (Caladenia huegelii);

Purdie’s Donkey Orchid (Diuris purdiei);

Dwarf Bee Orchid (Diuris micrantha);

Glossy-leafed Hammer Orchid (Drakaea elastica).

Dwarf Hammer Orchid (Drakaea micrantha);

Beaked Lepidosperma (Lepidosperma rostratum);

Australasian Bittern (Botaurus poiciloptilus);

Carnaby’s Black Cockatoo (Calyptorhynchus latirostris); and

Carnaby’s Black Cockatoos are the only species identified by DotEE that have been recorded on the

site. The remainder of the species listed by DotEE as likely to, or may be, impacted by the construction

of the proposed road have not been previously recorded on the site.

1.2 Scope of Works

The City of Gosnells has commissioned Targeted Surveys for the species listed above that have not

previously been recorded on the site. The recommended timing and guidelines for each for the

species identified by DotEE as being potentially impacted by the proposed street are outlined below.

Table 1: Relevant Timing and Guidance

Species Survey Timing DotEE Guidelines on Survey Techniques

Grand spider orchid (Caladenia huegelii)

Survey in peak flowering period September to early November

Draft Orchid Guidelines - 2013

Purdie’s Donkey Orchid (Diuris purdiei)

Survey in peak flowering period: late September to mid-October but flowers only after a summer fire


Dwarf Bee Orchid (Diuris micrantha)

Survey in peak flowering period early September to October.


Dwarf Hammer Orchid (Drakaea micrantha)

Survey in peak flowering period early September to October.


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Species Survey Timing DotEE Guidelines on Survey Techniques

Beaked Lepidosperma (Lepidosperma rostratum)

Peak flowering is from May to June and the distinctive fruits are beaked toward the base of the style, and generally appear between late June and August so survey from May to August.

None – will be as per the Draft Orchid Guidelines - 2013

Australasian Bittern (Botaurus poiciloptilus)

Broadcast surveys in suitable habitat, observation of targeted foraging habitat and area searches in suitable habitat for sightings, nests, indicative footprints and feathers.

A2.5 Australian Birds Survey Guidelines

Glossy-leafed Hammer Orchid (Drakaea elastica)

Peak flowering period is from late September to early November; however, the leaf is very distinctive and visible from April to December and can be surveyed within these months.


The targeted search for all species identified was undertaken in alignment with the guidelines as

recommended by DotEE and outlined in Section 3 of this report.

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2 TARGETED SPECIES

2.1 Grand Spider Orchid

The Grand Spider Orchid (Caladenia huegelii) is a large spider orchid that grows in sandy soils of the

Swan Coastal Plain. It has distinctive large flowers with a long fringe on the labellum (Brown et al.,

2013).

The Grand Spider Orchid is listed as flowering between September and October, according to

Florabase (DPaW, 2016) however PGV Environmental has significant experience with this species and

have observed that the peak flowering period is usually shorter than this and whether it is earlier or

later being dependent on seasonal conditions. A reference site is monitored each year by PGV

Environmental, containing a number of Grand Spider Orchids in the southern Perth Region to

determine when the peak flowering period is. In 2016 the peak flowering period commenced from

around 12 September 2016 until 11 October 2016 (Appendix 1).

2.2 Purdie’s Donkey Orchid

Purdie’s Donkey Orchid (Diuris purdiei) is a bright yellow donkey orchid that is flattened in appearance

(Brown et al., 2013). Purdie’s Donkey Orchid is a fire ephemeral and is not likely to be identified

without the bushland recently being burnt. Typically, this species is associated with Melaleuca

preissiana and Pericalymma elliptica in wetland environments (Williams et al., 2001).

2.3 Dwarf Bee Orchid

The Dwarf Bee Orchid (Diuris micrantha) is a small flowering Bee Orchid that grows in seasonally wet

flats (Brown et al., 2013). It is known from seven populations between east of Kwinana (DotEE, 2008)

and Boyup Brook (Brown et al., 2013). It is found in small populations, on dark, grey to blackish, sandy

clay-loam substrates in winter wet depressions or swamp (DotEE, 2008). This species flowers in

September to October with bright yellow flowers (Brown et al., 2013).

2.4 Glossy-leafed Hammer Orchid

Glossy-leafed Hammer Orchid (Drakaea elastica) is a hammer orchid that grows in sandy soils

associated with Banksia Woodlands (Brown et al., 2013), often with Kunzea ericifolia (Williams et al.,

2001). The leaf is very distinctive and visible being a heart shaped, bright green when fresh, glossy

leaf flat on the ground, being generally more visible than the flower. The Glossy-leafed Hammer

Orchid flowers in October and November (Brown et al., 2013), which means that the leaf is most visible

from August through to November.

2.5 Dwarf Hammer Orchid

The Dwarf Hammer Orchid (Drakaea micrantha) is, as the name suggests a small Hammer Orchid. The

species grows in open sandy patches in forests and woodland (Brown et al., 2013). The flower is

inconspicuous and is more recognisable by its silver veined leaf. This species like the Glossy-leafed

Hammer Orchid grows often in association with Kunzea ericifolia (Williams et al., 2001).

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2.6 Beaked Lepidosperma

The Beaked Lepidosperma (Lepidosperma rostratum) flowers from May to June and sets fruit from

July to August. It is a small tufted herb that has distinctive circular, deeply ribbed stems. This species

of lepidosperma is recorded from the Brixton Street wetlands in association with Meeboldina cana,

Calytrix aristatus, Meeboldina coangustata, Tremulina tremula, Cyathochaeta avenacea (DotEE,

2016).

2.7 Australasian Bittern

The Australasian Bittern (Botaurus poiciloptilus) is a thick-set heron that is generally dark brown, buff

and black on top and white chested (Birdlife Australia, 2016). This species prefers wetlands with tall

dense vegetation, where it forages in still, shallow water up to 0.3 m deep, often at the edges of pools

or waterways, or from platforms or mats of vegetation over deep water (DotEE, 2011). The species

has a distinctive call during calling season in September to December in the south-west of Western

Australia (Appendix 2).

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3 METHODOLOGY

3.1 Review of Previous Studies

Previous surveys specific to the site have been reviewed to determine if the species in question have

been recorded. In 2014 the site was surveyed in August and September 2014 by 360 Environmental

(360, 2014). The site was surveyed between 12 and 16 October 2015 by Natural Area Consulting (NAC,

2016a).

Surveys of surrounding sites have also been reviewed. The Holmes Street Bushland North, to the west

of the Garden Street Road Reserve, was surveyed in 2015 by Natural Area Consulting (NAC, 2016b).

The Sutherland Bushland, to the east of the site was surveyed in October 2009 by ENV Australia (ENV,

2010).

A review of the Department of Parks and Wildlife Databases including:

Naturemap;

The Department's Threatened (Declared Rare) and Priority Flora database;

The Western Australian Herbarium Specimen database for Threatened and Priority flora

species opportunistically collected in the area of interest;

The Department’s Threatened and Priority Flora List [this list is searched using ‘place names’.];

and

Threatened and Priority Fauna database.

3.2 Targeted Flora Species Survey

Site Survey

The entire site was surveyed on 14 September 2016 by Dr Paul van der Moezel, a highly experienced

botanist who is familiar with all of the species included in the Targeted Survey. The area of bushland

was traversed on foot along parallel transects 10m apart. The coverage was very high due to the open

nature of most of the bushland. The wetland areas containing Regelia ciliata were more difficult to

survey in straight lines so the areas were surveyed using the meander technique. A small section of

the bushland was inundated with up to 0.3m of water and was not walked, however the water would

be too deep to have any of the targeted species present. The time spent on site was six hours. Areas

that were in the vicinity of previously recorded populations were examined more closely.

Timing

The timing of the survey for the species identified for the Targeted Search was during the period at

which all species could be identified (Table 2).

Table 2: Flowering Period and Recognisability.

Species Name Common Name Status under EPBC Act

Flowering Period

Recognisability

Caladenia huegelii Grand Spider Orchid

Endangered Sept-Oct Surveyed at peak flowering period (Attachment 1)

Diuris purdiei Purdie’s Donkey Orchid

Endangered Sept-Oct Surveyed in flowering period

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Species Name Common Name Status under EPBC Act

Flowering Period

Recognisability

Diuris micrantha Dwarf Bee Orchid Vulnerable Sept-Oct Surveyed in flowering period

Drakaea elastica Glossy-leaved Hammer Orchid

Endangered Oct-Nov

Surveyed outside of flowering period but very identifiable when not flowering by the distinctive leaf that is present May-Sept

Drakaea micrantha Dwarf Hammer Orchid

Endangered Sept-Oct

Surveyed in flowering period and identifiable by veined leaf present from when not flowering

Lepidosperma rostratum

Beaked Lepidosperma

Endangered May-June

Surveyed outside of flowering period but identifiable when not flowering by curcular, deeply ribbed stems

The timing was in the flowering season for most of the species identified by DotEE and those that were

outside of the flowering period would still be recognisable. Therefore, the timing of the survey was

appropriate.

3.3 Targeted Search for the Australasian Bittern

The Australasian Bittern Survey was undertaken in accordance with methods developed by Birdlife

Australia and DPaW for conducting surveys for Australian Bittern in southwest Australia and the

Commonwealth Government’s ‘Survey Guidelines for Australia’s Threatened Birds’ (Department of

Environment Water Heritage and the Arts 2010). The survey was conducted over two nights by highly

experienced Ornithologist Dr Margot Oorbeek from Terrestrial Ecosystems. Full details of the survey

methodology are in Appendix 2.

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4 RESULTS

4.1 Previous Surveys

Surveys on the site have been undertaken for three consecutive years, 2014, 2015 and 2016. The

surrounding areas were undertaken in different years and seasonal conditions. The Targeted flora

species were not recorded on or near the site in any of these surveys.

The Database search for historical records shows that:

There are 132 records for Grand Spider Orchids in Naturemap and a population was recorded

in the vicinity of the southern part of the road alignment in 2004 (DPaW’s description was

Northern corner of Holmes St and Balfour St, Huntingdale. The block is north of the intersection

of Balfour St and Holmes St.).

The Population 44 (Huntingdale) as indicated by DotEE as possibly being present on the site is

located on Lot 103 Gray Street. It is likely that the population referred to was actually 37B,

located in the vicinity of the southern part of the site.

Purdie’s Donkey Orchid has 42 records and was last recorded in 2004 in the north-western

part of Bush Forever site approximately 520m west of the closest part of the proposed road.

There are 14 records of the Dwarf Bee Orchid in Naturemap and no records listed in the

Herbarium or Rare Flora databases. Naturemap shows three records greater than 10km to

the west and south-west.

There are 93 records of the Glossy-leafed Hammer Orchid in Naturemap. The nearest record

was 3.5km to the north-west of the site however this population is now listed as extinct due

to housing development.

The Dwarf Hammer Orchid has 93 records in Naturemap. The nearest record was located with

the Glossy-leafed Hammer Orchid and is also no longer present.

There are 42 records of the Beaked Lepidosperma with the closest record to the proposed

road greater than 6km to the south.

There are 209 records of the Australasian Bittern in the Naturemap Database, of which the

nearest is greater than 5km away to the south at Forrestdale Lake.

Therefore, the only species previously recorded in the DPaW Databases is the Grand Spider Orchid.

4.2 Seasonal Conditions

Climate statistics from the Bureau of Meteorology (BOM, 2016) can be used to compare seasonal

conditions for surveys (Graph 1). The statistics have been collected from Gosnells City (BOM Site

Number 009106) which has been collecting data from 1961.

The climate statistics show that 2015 had rainfall in July far less than the average and was a dry year

(Graph 1).

There was a less than average rainfall in June 2016, however July and August, 2016 had higher than

average rainfall and September is slightly less than average. The maximum and minimum

temperatures in September 2016 have been lower than the average. The season in 2016 has been

particularly good for orchid species (Graph 1).

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Graph 1: Mean climate statistics compared to 2015 and 2016.

4.3 Flora Species

The targeted search did not identify any of the species identified by DotEE and potentially being

impacted by the construction of the proposed Garden Street alignment as occurring on the site. No

additional species listed under the EPBC Act were recorded on the site.

The survey identified eight Orchidaceae species, six more than surveys undertaken in 2015. The

species identified on the site were:

Caladenia flava (Cow-slips);

Diuris corymbosa (Donkey Orchid);

Elythranthera brunonis (Purple Enamel Orchid);

Prasophyllum parvifolium (Autumn Leek Orchid);

Pterostylis glebosa (Clubbed Snail Orchid);

Pterostylis recurva (Jug Orchid);

Pterostylis vittata (Banded Greenhood); and

Pyrorchis nigricans (Red Beak Orchid).

The list of additional species confirms the statement in Section 4.2 that the 2016 orchid season was a

particularly good one.

0

20

40

60

80

100

120

140

160

180

0

5

10

15

20

25

30

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Rai

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Climate Statistics

Mean Monthly Rainfall (mm)

2015 Monthly Rainfall (mm)

2016 Monthly Rainfall (mm)

Mean Maximum Temperature (°C)

2015 Mean Maximum Temperature (°C)

2016 Mean Maximum Temperature (°C)

Mean Minimum Temperature (°C)

2015 Mean Minimum Temperature (°C)

2016 Mean Minimum Temperature (°C)

10266_002_jc V3 9

The location of the Grand Spider Orchid previously recorded in the vicinity of the southern end of the

road reserve was thoroughly searched. No Grand Spider Orchids were recorded in this area.

4.4 Australasian Bittern

The survey conducted by Terrestrial Ecosystems did not record the Australasian Bittern (Appendix 2).

10266_002_jc V3 10

5 CONCLUSION

A search of previous records shows that only the Grand Spider Orchid has been recorded in the vicinity

of the site previously. The 2014 targeted search and October 2015 Flora Survey did not record any

flora species listed under the EPBC Act on the site.

The targeted search undertaken in 2016 by PGV Environmental was undertaken in accordance with

the Draft Orchid Survey Guidelines. The Targeted Flora Survey had the following characteristics:

Undertaken in peak flowering conditions for five of the species;

All species would be identifiable if they are present on the site;

Seasonal conditions in 2016 have been favourable to flowering orchid species;

The survey was undertaken by Dr Paul van Der Moezel, a highly experienced botanist; and

The site coverage was high due to the time spent on the site and the trafficable nature of the

vegetation.

The Targeted Flora Survey did not identify any conservation significant flora species occurring on the

site. There have not been previous surveys identifying any flora listed under the EPBC Act as occurring

in the Garden Street Road Reserve, in three consecutive years. A previous record of the Grand Spider

Orchid in the vicinity of the southern end of the road reserve was not recorded on the site in surveys

undertaken in the three years. Therefore, the proposed road construction will not impact on any

populations of conservation significant flora species.

The Australasian Bittern Survey was undertaken in accordance with methods developed by Birdlife

Australia and DPaW for conducting surveys for Australian Bittern in southwest Australia and the

Commonwealth Government’s ‘Survey Guidelines for Australia’s Threatened Birds’ (Department of

Environment Water Heritage and the Arts 2010). The survey had the following characteristics:

Within the calling period of Australasian Bitterns;

Over two nights as recommended; and

Undertaken by Dr Margot Oorebeek, a highly experienced ornithologist.

No Australasian Bitterns were recorded on the site. Therefore, the proposed road construction is

highly unlikely to impact on this species. Prior to clearing it is recommended that the area is checked

for this migratory species and if it is present await clearing until it has moved off the site.

10266_002_jc V3 11

6 REFERENCES

360 Environmental (360) (2014) Targeted Flora Survey - Garden St Extension and Widening, Southern

River letter Report Ref 590AB Prepared for City of Gosnells Perth, Western Australia

Birdlife Australia (n.d) BirdLife Australia’s Bittern Survey Guide; Guidelines for surveying Australasian

and Australian Little Bitterns. Perth, Western Australia.

Birdlife Australia (2016) Species Profile Australasian Bittern - Botaurus poiciloptilus Accessed

November 2016 http://birdlife.org.au/bird-profile/australasian-bittern Australia

Brown, A., Dixon, K., French, C. and Brockman, G. (2013) Field Guide to the Orchids of Western

Australia. Simon Nevill Publications Perth, Western Australia.

Bureau of Meteorology (BOM) (2016) Climate Data online Accessed October 2016

http://www.bom.gov.au/climate/data/ Government of Western Australia, Perth.

Department of Environment Water Heritage and the Arts (2010) Survey Guidelines for Australia's

Threatened Birds. Canberra, Australia

Department of Parks and Wildlife (DPaW) (2016) The Western Australian Herbarium. FloraBase.

Accessed September 2016 http://florabase.dpaw.wa.gov.au/ Government of Western

Australia, Perth.

Department of the Environment and Energy (DotEE) (2008) Approved Conservation Advice for Diuris

micrantha (Dwarf Bee Orchid) Approved Conservation Advice Australia

Department of the Environment and Energy (DotEE) (2011) Approved Conservation Advice for

Botaurus poiciloptilus (Australasian Bittern) Approved Conservation Advice Australia

Department of the Environment and Energy (DotEE) (2013) Draft – Survey Guidelines for Australia’s

Threatened Orchids Guidelines for Detecting Orchids Listed as ‘Threatened’ Under the

Environment Protection and Biodiversity Conservation Act 1999 Australia

Department of the Environment and Energy (DotEE) (2016) Species Profile and Threats Database

(SPRAT) Lepidosperma rostratum — Beaked Lepidosperma Accessed November 2016

http://www.environment.gov.au/cgi-bin/sprat/public/publicspecies.pl?taxon_id=14152

Australia

ENV Australia (2010) Ecological Assessment of Sutherlands Park Bushland Report 09.190-001 Final

3-5-2010 Prepared for City of Gosnells Perth, Western Australia

Natural Area Consulting (NAC) (2016a) Report – Garden Street Road Reserve Environmental

Assessment Report 2015 9 16 NAC Prepared for City of Gosnells Perth, Western Australia

Natural Area Consulting (NAC) (2016b) Holmes Street Bushland North: Revegetation and Weed

Management Plan Report 2016 02 03 NAC Prepared for City of Gosnells Perth, Western

Australia

http://birdlife.org.au/bird-profile/australasian-bittern

http://www.bom.gov.au/climate/data/

http://florabase.dpaw.wa.gov.au/

http://www.environment.gov.au/cgi-bin/sprat/public/publicspecies.pl?taxon_id=14152

10266_002_jc V3 12

Williams, K., Horan, A., Wood, S. and Webb, A. (2001) Declared Rare and Poorly Known Flora in the

Central Forest Region. Western Australian Wildlife Management Program No. 33 Department

of Conservation and Land Management Perth, Western Australia

APPENDIX 1

Caladenia huegelii File Note

Caladenia hueglii File Note 2016 1

File Note 30 September 2016

Caladenia huegelii – Reference Location – Banjup

To verify the timing for targeted surveys for Caladenia huegelii a reference site in Banjup in the City

of Armadale was inspected in regular intervals during Spring 2016 by PGV Environmental to ensure

the timing of the surveys were appropriate for the identification of this species.

17 July 2016

Leaves on 90% of the known plants in the area were present

18 August 2016

Two leaves had been damaged by grazing, presumably rabbits. The remainder of the plants that were

recorded on the site as emerging with leaves were in bud with most in the early stages with buds

emerging at the base and two in full bud.


6 September 2016

Most individuals were still in bud with approximately 20% in flower


12 September 2016

All individuals that produced a flower spike are in full flower except one which has a prominent bud.


22 September 2016

All orchids that produced spikes are in full flower and additional individuals were recorded in an area

just to the west.

10 October 2016

Most flowers present but some starting to curl – considered to be the end of the peak period.

APPENDIX 2

Australasian Bittern Survey

10 Houston Place, Mt Claremont, Western Australia, Australia 6010 mob: 0407 385 239, email: [email protected]

www.terrestrialecosystems.com

Ref: 2016-0073-001-st

21 October 2016 Jackie Cabot Environmental Consultant PGV Environmental Unit 1, 61 Guthrie Street Osborne Park WA 6017 Re: Australasian Bittern survey

Dear Jackie

As requested, Terrestrial Ecosystems has undertaken a survey for Australasian Bitterns (Botaurus poiciloptilus) in the Garden Street project area in the City of Gosnells.

Dr Margot Oorebeek, a very experienced ornithologist, undertook a two night survey for the Australasian Bittern.

Methods

The surveys were undertaken in line with the method developed by Birdlife Australia (n.d.) and DPaW for conducting surveys for Australian Bittern in southwest Australia and the Commonwealth Government’s ‘Survey Guidelines for Australia’s Threatened Birds (Australian Government n.d.).

In southwest of Western Australia, the peak calling period of the Australasian Bittern is between September and December. The evening peak calling period is from 15 to 75 minutes after sunset and the morning peak calling period ends 30 minutes before sunrise. The surveys have been conducted in the evening for ease of access to the wetlands.

Due to the small size of the survey area the listening surveys were conducted from a fixed listening point located on the edge of the wetland. The southern section was surveyed on 17/10/2016 from 18:00-20:00pm and on 18/10/2016 from 18:20-20:00pm. Sunset was at 18:30pm which ensured that there was approximately an hour of daylight for a potential visual confirmation of the presence of bitterns while also covering the evening peak calling period. The survey was conducted at UTM 50 401580E, 6448943N on 17/10/2016 and at 50 401534E, 6449038N on 18/10/2016.

The northern wetland section is currently dry except for a drainage pond of approximately 10x10m. The northern section was physically surveyed on foot on 18/10/2016 from 18:00-18:20pm. Australasian Bittern calls can be heard up to 800m away, so any potential bittern calls should have been audible as the survey location on 18/10/2016 was located 90m from the northern section.

No Australasian Bitterns were recorded during these two surveys.

2

Please do not hesitate to contact the undersigned (0407 385 239), if you require any further information about this report.

Yours sincerely

Dr Scott Thompson Partner and Principal Zoologist Reference Australian Government. n.d. Survey guidelines for Australia's threatened birds. Canberra. Birdlife Australia. n.d. BirdLife Australia’s Bittern Survey Guide; Guidelines for surveying Australasian and

Australian Little Bitterns. Western Australia.

10266_005_jc V3 4

ATTACHMENT 3

2015 Caladenia huegelii File Note


File Note 30 September 2015

Caladenia huegelii – Reference Location

The reference location was inspected on 2 September 2015 and it was noted Caladenia huegelii buds

were present (Plate 1) and some individuals were in flower (Plate 2).

To verify the timing for spring flora surveys for which Caladenia huegelii was possibly present on the

site a reconnaissance survey was undertaken on 9 September 2015 by PGV Environmental to ensure

the timing of the surveys were appropriate for the identification of this species.

Caladenia huegelii was flowering throughout the site with all individuals in full bloom except one in

bud (Plate 4).

Plates – 2 September 2015


Plates: 9 September 2015




In the reference site 9 out of 10 orchids produced flowers. The site was checked on 23 September

2015 and flowers were still present.

Plate: 23 September

10266_005_jc V3 5

ATTACHMENT 4

Targeted Flora Survey – 360

Environmental 2014

Our Ref: 590AB 7 November 2014 Glenda Lawrence Engineering Project Officer City of Gosnells Telephone: 9397 3255 Via Email: [email protected]

Dear Glenda

Targeted Flora Survey - Garden St Extension and Widening, Southern River

1. Introduction

360 Environmental Pty Ltd (360 Environmental) was commissioned by City of Gosnells (CoG) to undertake a targeted flora survey of the proposed extension of Garden Street from Harpenden Street through to Holmes Street (which is located in Bush Forever site 125) along Holmes Street ending at Southern River Road (the project area). The project area is approximately 6.8 ha (Figure 1) which included the area proposed to be cleared and a 10 m buffer beyond the extent of the proposed clearing. The aim of the survey was to undertake a targeted search for Drakaea elastica and Caladenia huegelii and any other species of conservation significance likely to occur in the project area based on database searches and habitat present.

360 Environmental understands that the CoG had discussions with the Department of Environment Regulation (DER) and the Department of Parks and Wildlife’s (DPaW) Species and Communities Branch. These departments identified the need for a targeted flora survey to provide information on threatened and priority species within, and in close proximity to the area of proposed vegetation clearing. This information is required to precede and inform a future application for a vegetation clearing permit.

360 Environmental Pty Ltd 1

mailto:[email protected]

590AB Targeted Flora Survey Garden Street

City of Gosnells

2. Methods

The desktop assessment provided background information on the flora of the project area. Searches of the DPaW DRF and Priority Flora databases and EPBC Protected Matters Search Tool were undertaken to identify the potential for Threatened/DRF and Priority species to occur within 5 km of the central point of the project area (DPaW 2014). These were used to compile a list of expected Threatened or Priority species that may occur in the project area.

The flora survey was undertaken, where practical and relevant, in accordance with the requirements set by the EPA for environmental surveying and reporting for flora and vegetation in Western Australia, as set out in the following documents:

EPA Guidance for the Assessment of Environmental Factors: Terrestrial Flora and Vegetation Surveys for Environmental Impact Assessment in Western Australia No. 51 (EPA 2004a); and

EPA Guidance for the Level of Assessment for Proposals affecting Natural Areas within the System 6 Region and Swan Coastal Plain Portion of the System 1 region. Guidance Statement No. 10 (EPA 2006).

The field survey was conducted on two separate occasions to allow for the different growth stages of some species that could potentially occur on site. These searches took place on 5 August and 23 September 2014. The survey involved traversing the project area on foot, by systematically walking a series of transects spaced equidistantly apart to search for species of conservation significance, particularly Drakaea elastica, Caladenia huegelii and other species identified during the desktop assessment.

The initial survey was undertaken in August to target Drakaea elastica which is more easily identifiable during the leaf stage of growth (July to August). The second survey was undertaken during spring to target Caladenia huegelii, Diuris purdiei and other significant species that had been identified during the desktop assessment as possibly occurring in the project area. For each population of suspected significant flora located in the project area the following was recorded:

Co-ordinate locations (using handheld GPS units);

Photograph; and

Estimation of population size.



City of Gosnells

3. Results

3.1. Vegetation Description

There were a number of different vegetation associations along the length of the project area and these included: Banksia Woodland, Regelia ciliata and Banksia ilicifolia Shrubland, Kunzea glabrescens Thicket, Sedgelands and Herblands of Phlebocarya ciliata and Dasypogon bromeliifolius and Melaleuca preissiana woodlands.

3.2. Vegetation Condition

The uncleared areas of vegetation were in Excellent condition with some localised disturbance, such as weeds, tracks and dumped rubbish. Vegetation condition was assessed based on Bush Forever (Government of Western Australia 2000).

The project area also included parkland areas consisting of a mix of both endemic and planted non-endemic trees. The alignment also included the road verge which was comprised of occasional native trees and common weed species such as Briza maxima, Ehrharta calycina, Cenchrus clandestinus and Hypochaeris glabra.

3.3. Flora of Conservation Significance

The aim of this survey was to undertake a targeted search for Threatened or Priority flora species which were identified in the database searches as potentially occurring in the project area, particularly Drakaea elastica and Caladenia huegelii. However, no Threatened species pursuant to the EPBC Act and/or gazetted as Declared Rare Flora (Threatened) pursuant to the WC Act were recorded during the survey.

One Priority 3 species, Jacksonia gracillima (Plate 1 and 2), as listed by DPaW was recorded during the survey from two locations (Table 1).

Plates 1 and 2: Jacksonia gracillima



City of Gosnells

Table 1: Locations of Jacksonia gracillima (P3) and number of plants

TAXA EASTING NORTHING NUMBER OF PLANTS

Jacksonia gracillima

401525

6449116

2

Jacksonia gracillima

401533

6449082

2

The review of the database searches identified 37 conservation significant flora potentially occurring in the vicinity of the project area. The likelihood of these 37 conservation significant taxa occurring in the project area is outlined in Table 2.



City of Gosnells

Table 2: Likelihood of Occurrence for Conservation Significant Species Identified During the Desktop Assessment

DRF/T = Declared Rare Flora/Threatened P1/2/3/4 = Priority Flora DPaW = Department of Parks and Wildlife EPBC = Environment Protection and Biodiversity Conservation Act

CONSERVATION

STATUS SPECIES SOURCE HABITAT INFORMATION (WAH 2014) SUITABLE

HABITAT

PRESENT

LIKELIHOOD OF

OCCURRENCE IN THE

PROJECT AREA

P2 Acacia benthamii DPaW Sand, Typically on limestone breakaways. No Unlikely

P1 Acacia lasiocarpa var. bracteolata long peduncle variant (G.J.Keighery 5026)

DPaW Grey or black sand over clay. Swampy areas, winter wet lowlands.

Yes Likely

P4 Acacia oncinophylla subsp. patulifolia DPaW Granitic soils, occasionally on laterite. No Unlikely

P2 Andersonia sp. blepharifolia (F. & J. Hort 1919) DPaW Information Unavailable N/A Unknown

P4 Aponogeton hexatepalus DPaW Mud, freshwater: ponds, rivers, claypans. Yes Possible

P3 Asteridea gracilis DPaW Sand, clay, gravelly soils. Yes Possible

P1 Austrostipa jacobsiana DPaW Information Unavailable N/A Likely

DRF/T Banksia mimica EPBC, DPaW

White or grey sand over laterite, sandy loam. No Unlikely

P4 Boronia tenuis DPaW Laterite, stony soils, granite. No Unlikely

P3 Byblis gigantea DPaW Sandy-peaty swamps, seasonally wet areas. Yes Likely

DRF/T Caladenia huegelii EPBC, DPaW

Grey or brown sand, clay loam. Yes Likely

DRF/T Calytrix breviseta subsp. breviseta EPBC, DPaW

Sandy clay. Swampy flats. Yes Possible

DRF/T Conospermum undulatum EPBC, Grey or yellow-orange clayey sand. No Unlikely


590AB Targeted Flora Survey

Garden Street City of Gosnells

DPaW

DRF/T Diuris purdiei EPBC, DPaW

Grey-black sand, moist. Winter-wet swamps. Yes Likely

DRF/T Drakaea elastica EPBC, DPaW

White or grey sand, low lying situations adjoining winter-wet swamps.

Yes Likely

DRF/T Drakaea micrantha EPBC, DPaW

White-grey sand. Yes Likely

DRF/T Eleocharis keigheryi EPBC, DPaW

Clay, sandy loam. Emergent in fresh water: creeks, claypans.

Yes Possible

P1 Eremaea asterocarpa subsp. brachyclada DPaW Deep grey sand. yes Likely

DRF/T Eremophila glabra subsp. chlorella EPBC, DPaW

Sandy clay. Winter-wet depressions. Yes Possible

P3 Eryngium pinnatifidum subsp. palustre (G.J. Keighery 13459) PN

DPaW Information Unavailable N/A Unknown

P4 Grevillea thelemanniana subsp. thelemanniana DPaW Information Unavailable N/A Unknown

P3 Halgania corymbosa DPaW Gravelly soils, soils over granite. No Unlikely

P1 Hemigenia rigida DPaW Sandy soils, lateritic gravelly soils. Hill slopes, granite outcrops, flat, ironstone ridges.

Yes Possible

P3 Jacksonia gracillima DPaW Information Unavailable N/A Found on site

P2 Johnsonia pubescens subsp. cygnorum DPaW Grey-white-yellow sand. Flats, seasonally-wet sites.

Yes Likely

DRF/T Lepidosperma rostratum EPBC, DPaW

Brown. Peaty sand, clay. No Unlikely

P3 Meeboldina decipiens subsp. decipiens DPaW Sand and sandy peat. Swamps. Yes Likely

P4 Ornduffia submersa DPaW Information unavailable N/A Unknown

P3 Schoenus benthamii DPaW White, grey sand, sandy clay. Winter-wet flats, Yes Likely




swamps.

P3 Schoenus capillifolius DPaW Brown mud. Claypans. No Unlikely

P1 Schoenus pennisetis DPaW Grey or peaty sand, sandy clay. Swamps, winter wet depressions

Yes Likely

P2 Stenanthemum sublineare DPaW Littered white sand. Coastal plain. No Unlikely

P3 Tetratheca sp. Granite (S. Patrick SP1224) DPaW Clay, moist loam, clayey sand. Granite boulders. No Unlikely

DRF/T Thelymitra stellata EPBC, DPaW

Sand, gravel, Lateritic loam. No Unlikely

P4 Thysanotus glaucus DPaW White, grey or yellow sand, sandy gravel. Yes Likely

P4 Tripterococcus paniculatus DPaW Grey, black or peaty sand. Winter-wet flats. Yes Possible

P4 Verticordia lindleyi subsp. lindleyi DPaW Sand, sandy clay. Winter-wet depressions. Yes Likely


590AB Targeted Flora Survey Garden street

City of Gosnells

4. Discussion

No threatened species pursuant to the EPBC Act or to the WC Act were recorded in the project area during the field survey. Eleven species listed as Threatened by the EPBC Act, and also listed under the WC Act, were identified as potentially occurring in the project area. Of these, four are considered likely to occur, three are considered possible and four are considered unlikely to occur due to a lack of suitable habitat i.e. soil type and density of understory species is not suitable for these species (Table 2).

The surveys were undertaken at times considered most appropriate to maximise the likelihood of recording each of the threatened or DRF species, based on their growth patterns and times that each species is considered more detectible.

A further 26 priority taxa were identified as potentially occurring in the project area based on database searches. Of these, ten are considered likely to occur, four as possibly occurring, seven as unlikely to occur and four which are not known due to lack of information on their preferred habitat. One priority species (Jacksonia gracilima P3), was located in the project area.

Four specimens of Jacksonia gracillima (P3) were located within the project area (Table 1). Jacksonia gracillima (P3) is a shrub that produces orange to yellow flowers and is known to occur on winter-wet sites (WAH 2014).

The presence of Jacksonia gracillima (P3) does not form a statutory constraint for the project area. There is no written policy on how to respond to the presence of Priority Flora species within proposed development sites. The presence of these species is dealt with by DER on a case by case basis.

5. Conclusions

The targeted flora survey was undertaken at the times considered to be most appropriate for the species of conservation significance considered likely to occur, and within the recommended season and flowering period for the south west botanical province. The project area was sufficiently surveyed and as such the following conclusions can be drawn:

No Threatened species are present on site;

One Priority 3 species, Jacksonia gracillima, as listed by DPaW was recorded during the survey.




We trust this meets your requirements at this time. Should you have any questions or require further action please do not hesitate to contact Narelle Whittington on (08) 9388 8360. We look forward to hearing from you.

For and on behalf of

360 Environmental Pty Ltd

Narelle Whittington - Principal Botanist

Enc: Attachment 1.0 – Figure 1Site Location Attachment 2.0 – Figure 2Jacksonia gracillima locations




6. References

Department of Parks and Conservation [DPaW] (2013b). Request for Rare Flora Information (custom search). Western Australian Herbarium [WAH] (2014).

Government of Western Australia (2000). Bush Forever: Volume 1: Policies, Principles and Processes. Perth: Department of Environmental Protection.

Western Australian Herbarium [WAH] (2014). Florabase - Information on the Western Australian Flora. Accessed from http://florabase.dpaw.wa.gov.au


http://florabase.dpaw.wa.gov.au/



FIGURES


10266_005_jc V3 6

ATTACHMENT 5

Proposed Road Cross-Section

10266_005_jc V3 7

ATTACHMENT 6

City of Gosnells Management

Commitments

Mitigation measures - Management, Monitoring and Contingency Actions & Reporting The mitigation measures proposed by the City outlined below are designed to assist all parties involved in the project to manage the identified potential impacts that may result from the project actions, particularly during the construction phase of the project. The mitigation measures will be used by the City of Gosnells as minimum requirements for the construction team and any other project personnel, to prepare and submit their own construction environment management plan (CEMP) for the project. The mitigation measures expand on the avoidance measures to further reduce the impact.

Surface Water and Groundwater Management Actions Management Action Timing Responsibility

1

Prepare a Spill Response Procedure for oil, chemical or hazardous material spill events to ensure any spill is contained effectively and cleaned up appropriately and efficiently with approved materials.

Pre- construction

Contractor/City of Gosnells Engineering Operations

2

Assess the need for and implement, if required, Acid Sulfate Soil (ASS) site investigations and prepare an ASS Management Plan.

Pre- construction Project Manager

3

Drainage is designed to ensure there is no direct discharge of road run-off to environmental areas, other than controlled discharge as designed.

Design Designer

4 Design drainage to include erosion control and scour protection measures. Design Designer

5

Prepare the Rehabilitation and Landscape Plan so that best practice revegetation of disturbed areas (namely the road batters and median strips) would involve the application of mulch derived from vegetation cleared from the project footprint, with direct seeding and/or tubestock grown from locally collected seed to complement. The revegetation would be managed, including weed control, for a period of three years to ensure good establishment and achievement of predetermined completion criteria.

Design Project Manager

6 Erosion control will be applied at drainage discharge points. Design Designer

7

The workforce induction will include information on surface water and groundwater protection during construction.

Workforce induction


8 Construct the road drainage as designed. Construction Contractor/City of Gosnells Engineering Operations

9 Comply with any approved ASS Management Plan as applicable to the project

Construction Contractor/City of Gosnells Engineering Operations

Surface Water and Groundwater Management Actions Management Action Timing Responsibility

10 No runoff from construction areas will be directed into adjacent wetlands or watercourses, other than as per design.


11 Install temporary erosion and sediment control measures during construction Construction


12

Revegetate disturbed areas of the site as per the Rehabilitation and Landscape Plan with the application of mulch derived from vegetation cleared from the project footprint, with direct seeding and/or tubestock grown from locally collected seed to complement. The revegetation would be managed, including weed control, for a period of three years to ensure good establishment and achievement of predetermined completion criteria.

Construction & post construction

City of Gosnells Parks & Environmental Operations

13 Hydrocarbon storage will not be permitted within 200 m of a watercourse or wetland. Construction


14

No re-fuelling of equipment, with the exception of stationary plant, will be conducted within 50 m of a watercourse or wetland.


15

All chemicals on site will be stored in purpose built containers/tanks in accordance with their Material Safety Data Sheet.


16 Refuelling on site will be undertaken on a sealed/bunded surface or using a catch tray.


17 Vehicles will not be left unattended when filling. Construction


18

The transfer of chemicals, for example, pouring from one container to another, on site will be undertaken on a sealed/bunded surface or using a catch tray.


19 All hydrocarbon spills will be recorded as environmental incidents. Construction


20 Appropriate permits/approvals will be acquired for the taking of surface and/or groundwater.

Construction Project Manager/Contractor

21 Comply with conditions detailed on any ground or surface water use licenses. Construction


Surface Water and Groundwater Monitoring Parameter Frequency Location Responsibility Evidence of physical disturbance to watercourses or wetlands beyond the approved clearing area.

Weekly during construction. Wetlands and watercourses crossings


Evidence of erosion on embankments. Opportunistic and weekly site inspections during construction.

Entire site Contractor/City of Gosnells Engineering Operations

Run off from construction areas into wetlands and watercourses.

Opportunistic and weekly site inspections during construction.

Entire site Contractor/City of Gosnells Engineering Operations

Monitoring as per individual ground and/or surface water abstraction and dewatering licence conditions. If required.

As per permit conditions.

Groundwater bores, surface water abstraction and dewatering sites. Where available.


Surface and Groundwater Reporting Parameter Frequency Responsibility Report to Occurrences of erosion on the site and runoff into wetlands/watercourses and contingency actions implemented

Monthly Contractor/City of Gosnells Engineering Operations

Project Manager

Contingency actions including the implementation of any contingency actions and any new contingencies recommended.

Monthly Contractor/City of Gosnells Engineering Operations

Project Manager

Surface and Groundwater Contingency Actions Trigger Action

Non-compliance of management measures

1. The likely cause of the non-compliance will be immediately investigated. 2. Remedial action will be undertaken immediately to repair damage if required. 3. Preventative actions will be taken to prevent further non- compliance. 4. A review will be conducted of management measures and/or further education of staff/contractors to ensure that all possible steps are taken to prevent any reoccurrence.

Occurrence of erosion

1. Investigate the cause 2. If the occurrence is a result of the construction of the road preventative actions will be undertaken to prevent further erosion. These may include: Application of fill/mulch, Installation of gabion cages, Installation of jute matting to secure embankments. 3. Monitor the effectiveness of the remedy.

Spill or leak of hazardous materials during construction

1. The cause of spills will be investigated. 2. An appropriate remedy will be implemented, possibly, including: * repairing defective equipment * revising handling procedures. 3. The effectiveness of the remedy will be monitored.

10266_005_jc V3 8

ATTACHMENT 7

Traffic Volumes

Worksheet 4 - Travel Time Cost Savings

1

2

3

4

Time Zero

(veh/hr)Year 2 Year 8 Year 15 Year 30

Time Zero

(veh/hr)Year 2 Year 8 Year 15 Year 30

AM Peak 1130 1218 1524 1980 1980 1130 1218 1524 1980 1980

Interpeak 565 609 762 990 990 565 609 762 990 990

PM Peak 1130 1218 1524 1980 1980 1130 1218 1524 1980 1980

AADT All periods 0 0 0 0 0 0 0 0

5

TTC

Time Period Flow Factor hours/day days/year $/HR Year 2 Year 8 Year 15 Year 30 Year 2 Year 8 Year 15 Year 30 Year 2 Year 8 Year 15 Year 30

Weekday AM Peak 1 2 245 $22.54 0.00 38.49 48.21 62.74 62.74 $425,109.01 $532,429.04 $692,918.01 $692,918.01 (a)

Weekday Interpeak 1 8 245 $27.01 0.00 38.45 48.13 62.56 62.56 $2,035,607.01 $2,548,118.42 $3,311,694.20 $3,311,694.20 (b)

Weekday PM Peak 1 2 245 $22.30 0.00 38.49 48.21 62.74 62.74 $420,582.56 $526,759.87 $685,540.00 $685,540.00 (c)

Weekday Off Peak 0.25 12 245 $22.91 0.00 0.00 0.00 0.00 4.80 6.01 7.81 7.81 $323,575.24 $404,972.99 $526,168.11 $526,168.11 (d)

Weekend Peak 0.45 8 120 $25.55 0.00 0.00 0.00 0.00 8.65 10.82 14.06 14.06 $212,124.09 $265,494.94 $344,968.77 $344,968.77 (e)

Weekend Off Peak 0.15 16 120 $24.80 0.00 0.00 0.00 0.00 2.88 3.61 4.69 4.69 $137,240.48 $171,761.64 $223,158.79 $223,158.79 (f)

5E All periods N/A 24 365 $25.70 0 0.00 0.00 0.00 0.00 $0.00 $0.00 $0.00 $0.00 (g)

(Q) (R) (S) (T) (U) (V) (W) (X) (Y) (V) (W) (X) (Y) $3,554,238.38 $4,449,536.90 $5,784,447.88 $5,784,447.88 Total for All Day Periods

$0.00 $0.00 $0.00 $0.00 Total for Day Long

6

TTC

Time Period Flow Factor hours/day days/year $/HR Year 2 Year 8 Year 15 Year 30 Year 2 Year 8 Year 15 Year 30 Year 2 Year 8 Year 15 Year 30

Weekday AM Peak 1 2 245 $22.54 0.00 22.77 28.52 37.11 37.11 $251,472.93 $314,958.02 $409,895.16 $409,895.16 (a)

Weekday Interpeak 1 8 245 $27.01 0.00 22.75 28.47 37.01 37.01 $1,204,161.89 $1,507,337.66 $1,959,030.37 $1,959,030.37 (b)

Weekday PM Peak 1 2 245 $22.30 0.00 22.77 28.52 37.11 37.11 $248,795.32 $311,604.43 $405,530.71 $405,530.71 (c)

Weekday Off Peak 0.25 12 245 $22.91 0.00 0.00 0.00 0.00 2.84 3.56 4.62 4.62 $191,410.70 $239,561.49 $311,254.38 $311,254.38 (d)

Weekend Peak 0.45 8 120 $25.55 0.00 0.00 0.00 0.00 5.12 6.40 8.32 8.32 $125,481.86 $157,053.35 $204,066.03 $204,066.03 (e)

Weekend Off Peak 0.15 16 120 $24.80 0.00 0.00 0.00 0.00 1.70 2.13 2.77 2.77 $81,184.51 $101,605.47 $132,009.42 $132,009.42 (f)

6E All periods N/A 24 365 $25.70 0 0.00 0.00 0.00 0.00 $0.00 $0.00 $0.00 $0.00 (g)

(Q) (R) (S) (T) (U) (V) (W) (X) (Y) (V) (W) (X) (Y) $2,102,507.21 $2,632,120.42 $3,421,786.07 $3,421,786.07 Total for All Day Periods

$0.00 $0.00 $0.00 $0.00 Total for Day Long

7

Start Year 2 End Year 7 Start Year 8 End Year 14 Start Year 15 End Year 30

Travel Time Cost

Do-minimum$3,554,238.38 $4,449,536.90 $4,449,536.90 $5,784,447.88 $5,784,447.88 $5,784,447.88

Travel Time Cost

Option$2,102,507.21 $2,632,120.42 $2,632,120.42 $3,421,786.07 $3,421,786.07 $3,421,786.07

Midpoint

Duration Years

Do-minimum TTC at midpoint

Option TTC at midpoint

8 Midpoint Benefits

9

[ ( m1 x 6 x 0.7416 ) + ( m2 x 7 x 0.4511 ) + ( m3 x 16 x 0.1958 ) ] C

m1 m2

$3,026,953.24 $3,421,786.07

$1,634,573.83 $2,090,039.14 $2,362,661.81

$21,274,663.21

Time Periods

Time Periods

16

$4,001,887.64 $5,116,992.39 $5,784,447.88

Year 4 Year 11.5 Year 22

6A Project Timings from Annualisation Factors

m3

Annual Travel Time Cost ($/year) for modelled years

$2,367,313.82

6 7

AM / Inter / PM peak periods

DO MINIMUM OPTION

Midblock Assessment - Traffic Volumes

6D Annual Travel Time Cost ($/year)

5D Annual Travel Time Cost ($/year)Modelling Results Inputs (veh.hr/hr)

5B Isolated Intersection 5C Road Midblock Improvement

Modelling Results Inputs (veh.hr/hr)

6B Isolated Intersection


6C Road Midblock Improvement

PV Travel Time Cost Savings

Annual Travel Time Cost for Modelled Years

Option Modelling

Do-minimum Modelling

Road Type

Project Type

Modelling Period Type

Mid-block/mid-block as part of route improvement

District Distributor A

5A Project Timings from Annualisation Factors


atennakoon

Text Box

Garden Street extension project - Travel time cost savings and vehicle operation cost savings

Worksheet 5 - VOC and CO2 Cost Savings

1

2

3

4 Do-minimum Traffic Flow

Time Period Flow FactorTime periods

(hrs/day)Days/year Year 2 Year 8 Year 15 Year 30

Weekday AM Peak 1 2 245 1218 1524 1980 1980 (a)

Weekday Interpeak 1 8 245 609 762 990 990 (b)

Weekday PM Peak 1 2 245 1218 1524 1980 1980 (c)

Weekday Off Peak 0.25 12 245 152 191 248 248 (d)

Weekend Peak 0.45 8 120 274 343 446 446 (e)

Weekend Off Peak 0.15 16 120 91 114 149 149 (f)

All periods N/A 24 365 0 0 0 0 (g)

(Q) (R) (S) (T) (U) (V) (W) (X)

5

Time Period Flow FactorTime periods

(hrs/day)Days/year Year 2 Year 8 Year 15 Year 30

Weekday AM Peak 1 2 245 1218 1524 1980 1980 (a)

Weekday Interpeak 1 8 245 609 762 990 990 (b)

Weekday PM Peak 1 2 245 1218 1524 1980 1980 (c)

Weekday Off Peak 0.25 12 245 152 191 248 248 (d)

Weekend Peak 0.45 8 120 274 343 446 446 (e)

Weekend Off Peak 0.15 16 120 91 114 149 149 (f)

All periods N/A 24 365 0 0 0 0 (g)

(Q) (R) (S) (T) (U) (V) (W) (X)

6 & 7

# of Lanes Interval Hr t0 Speed Q JA tf (min/km) rf 0.25*rf

Akcelik Link Parameters 2 10.00 60.00 1.33 45 1700 6.72 1.33 45.00 11.25

Year

Time period

Weekday AM Peak 0 44.93 44.89 44.81 44.81 29.2 29.2 29.2 29.2 (a)

Weekday Interpeak 0 44.97 44.96 44.95 44.95 29.2 29.2 29.2 29.2 (b)

Weekday PM Peak 0 44.93 44.89 44.81 44.81 29.2 29.2 29.2 29.2 (c)

Weekday Off Peak 0 0 0 0 44.99 44.99 44.99 44.99 29.2 29.2 29.2 29.2 (d)

Weekend Peak 0 0 0 0 44.99 44.99 44.98 44.98 29.2 29.2 29.2 29.2 (e)

Weekend Off Peak 0 0 0 0 45.00 45.00 44.99 44.99 29.2 29.2 29.2 29.2 (f)

All periods 47 47 47 47 45.00 45.00 45.00 45.00 29.2 29.2 29.2 29.2 (g)

Year

Time period

Weekday AM Peak 0 1729 2164 2812 2812 $247,413.82 $309,641.14 $402,283.73 $402,283.73 (a)

Weekday Interpeak 0 865 1082 1406 1406 $494,827.64 $619,282.27 $804,567.46 $804,567.46 (b)

Weekday PM Peak 0 1729 2164 2812 2812 $247,413.82 $309,641.14 $402,283.73 $402,283.73 (c)

Year 8


Year 2 Year 8 Year 15 Year 30

Year 30

Year 30

Year 30

6C Total Travel Distance (veh.km/hr)

Year 2

Mid-block/mid-block as part of route improvementIsolated intersection/intersection as part of route improvement

7B Annual VOC Cost ($/year)

Year 2 Year 8 Year 15

Year 2

AADT (veh/day)

Year 2 Year 8 Year 15

Vehicle Speeds and VOC costs - Do-minimum

Isolated intersection/intersection as part of route improvement

6A Mean Speed (km/hr) 6B Mean Speed (km/hr) 7A VOC Cost (cents/km)

Year 15

Year 15

6D Total Travel Distance (veh.km/hr)

Year 30Year 8

Year 2 Year 30

Year 8 Year 15

District Distributor A


AM / Inter / PM peak periods

4B Traffic Flow Data (veh/hr)

5A Project timings from Annualisation Factors

Time periods

4A Project timings from Annualisation Factors

Time periods

AADT (veh/day)

Modelling Period Type

Project Type

Road Type

MID BLOCK ONLY

Option Traffic Flow MID BLOCK ONLY

5B Traffic Flow Data (veh/hr)

Weekday Off Peak 0 0 0 0 216 271 351 351 $185,560.36 $232,230.85 $301,712.80 $301,712.80 (d)

Weekend Peak 0 0 0 0 389 487 633 633 $109,064.05 $136,494.87 $177,333.24 $177,333.24 (e)

Weekend Off Peak 0 0 0 0 130 162 211 211 $72,709.37 $90,996.58 $118,222.16 $118,222.16 (f)

All periods 2 2 2 2 0 0 0 0 $0.00 $0.00 $0.00 $0.00 (g)

$1,356,989.06 $1,698,286.84 $2,206,403.10 $2,206,403.10 Total for All Day periods

$0.00 $0.00 $0.00 $0.00 Total for day long

8 & 9

# of Lanes Interval Hr t0 Speed Q JA tf (min/km) rf 0.25*rf

Akcelik Link Parameters 2 10.00 60.00 1.33 45 1700 6.72 1.33 45.00 11.25

Year

Time period

Weekday AM Peak 0 44.93 44.89 44.81 44.81 29.2 29.2 29.2 29.2 (a)

Weekday Interpeak 0 44.97 44.96 44.95 44.95 29.2 29.2 29.2 29.2 (b)

Weekday PM Peak 0 44.93 44.89 44.81 44.81 29.2 29.2 29.2 29.2 (c)

Weekday Off Peak 0 0 0 0 44.99 44.99 44.99 44.99 29.2 29.2 29.2 29.2 (d)

Weekend Peak 0 0 0 0 44.99 44.99 44.98 44.98 29.2 29.2 29.2 29.2 (e)

Weekend Off Peak 0 0 0 0 45.00 45.00 44.99 44.99 29.2 29.2 29.2 29.2 (f)

All periods 35 35 35 35 45.00 45.00 45.00 45.00 29.2 29.2 29.2 29.2 (g)

Year

Time period

Weekday AM Peak 0 1023 1280 1663 1663 $146,357.47 $183,168.00 $237,970.66 $237,970.66 (a)

Weekday Interpeak 0 511 640 832 832 $292,714.94 $366,335.99 $475,941.31 $475,941.31 (b)

Weekday PM Peak 0 1023 1280 1663 1663 $146,357.47 $183,168.00 $237,970.66 $237,970.66 (c)

Weekday Off Peak 0 0 0 0 128 160 208 208 $109,768.10 $137,376.00 $178,477.99 $178,477.99 (d)

Weekend Peak 0 0 0 0 230 288 374 374 $64,516.76 $80,743.44 $104,901.35 $104,901.35 (e)

Weekend Off Peak 0 0 0 0 77 96 125 125 $43,011.17 $53,828.96 $69,934.23 $69,934.23 (f)

All periods 5 5 5 5 0 0 0 0 $0.00 $0.00 $0.00 $0.00 (g)

$802,725.92 $1,004,620.38 $1,305,196.20 $1,305,196.20 Total for All Day periods

$0.00 $0.00 $0.00 $0.00 Total for day long

10

Start Year 2 End Year 7 Start Year 8 End Year 14 Start Year 15 End Year 30

Annual VOC Cost - Do-

minimum$1,356,989.06 $1,698,286.84 $1,698,286.84 $2,206,403.10 $2,206,403.10 $2,206,403.10

Annual VOC Cost - Option $802,725.92 $1,004,620.38 $1,004,620.38 $1,305,196.20 $1,305,196.20 $1,305,196.20

Midpoint

Duration Years

Do-minimum VOC at midpoint

Option VOC at midpoint

11 Midpoint Benefits

12

[ ( m1 x 6 x 0.7416 ) + ( m2 x 7 x 0.4511 ) + ( m3 x 16 x 0.1958 ) ] D

Annual Vehicle Operating Cost ($/year) for modelled years

Year 4 11.5 22

Year 30Year 15Year 8Year 2

Year 15

9B Annual VOC Cost ($/year)

Year 15

Year 8 Year 30

6 7

$1,154,908.29

16

8A Mean Speed (km/hr)

8C Total Travel Distance (veh.km/hr)

Year 2 Year 8 Year 30 Year 2 Year 8Year 15

Year 30

Isolated intersection/intersection as part of route improvement

Year 8 Year 15Year 2 Year 2 Year 8


8D Total Travel Distance (veh.km/hr)

Year 30

Annual Vehicle Operating Cost for Modelled Years

8B Mean Speed (km/hr)

$8,117,760.53

$1,527,637.95

$903,673.15

$623,964.80

$1,952,344.97

m1 m2 m3

$797,436.68

$2,206,403.10

$1,305,196.20

$901,206.90

PV Vehicle Operation Cost Savings

9A VOC Cost (cents/km)

Year 2Year 15 Year 30

Isolated intersection/intersection as part of route improvement Mid-block/mid-block as part of route improvement

Vehicle Speeds and VOC costs - Option

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