Environmental Review - Peel Region Scheme Amendment … · Environmental Review Peel Region Scheme Amendment 017/57, North Yunderup SUMMARY The Peel Region Planning Committee of the

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ENVIRONMENTAL REVIEW Peel Region Scheme Amendment 017/57 North Yunderup

ENVIRONMENTAL REVIEW Peel Region Scheme Amendment 017/57 North Yunderup

Prepared by: RPS

38 Station Street, SUBIACO WA 6008

PO Box 465, SUBIACO WA 6904

T: 618 9211 1111

F: 618 9211 1122

E: [email protected]

W: rpsgroup.com.au

Report No: L09459 Version/Date: Rev 1, September 2010

Prepared for: PRDNATIONWIDE PROJECT MARKETING (WA)

Level 1, 35 St Quentins Avenue

CLAREMONT WA 6010

RPS Environment and Planning Pty Ltd (ABN 45 108 680 977)

Environmental Review

Peel Region Scheme Amendment 017/57, North Yunderup

L09459, Rev 1, September 2010 DOCUMENT STATUS / DISCLAIMER

Document Status

Version Purpose of Document Orig Review Review Date

Format Review

RPS Release Approval

Issue Date

Draft A Draft for Client Review BenHol KriBen 22.04.10 SN 23.04.10

Draft B Draft for EPA Review BenHol 05.07.10 SN 09.07.10

Rev 0 Final for Submission BenHol 29.07.10 SN 29.07.10 B. Hollyock 30.07.10

Rev 1 Final for Submission JilAbe LukRog 06.10.10 DC 06.09.10 J. Halleen 08.09.10

Disclaimer This document is and shall remain the property of RPS. The document may only be used for the purposes for which it was commissioned and in accordance with the Terms of Engagement for the commission. Unauthorised copying or use of this document in any form whatsoever is prohibited.



SUBMISSION PROCESS

Invitation to Make a Submission The Environmental Protection Authority (EPA) invites people to make a submission on this proposal. Both electronic and hard copy submissions are most welcome. The Peel Region Planning Committee of the Western Australian Planning Commission propose to amend the Peel Region Scheme in areas of North Yunderup (refer Figures 1 and 2) from Rural to Urban and Urban Deferred to facilitate residential development. In accordance with the Environmental Protection Act 1986 (EP Act), an Environmental Review has been prepared which describes this proposal and its likely effects on the environment. The Environmental Review is available for a public review period from (date) closing on (date) (yet to be determined). Comments from government agencies and from the public will help the EPA to prepare an assessment report in which it will make recommendations to government. Why Write a Submission? A submission is a way to provide information, express your opinion and put forward your suggested course of action – including any alternative approach. It is useful if you indicate any suggestions you have to improve the proposal. All submissions received by the EPA will be acknowledged. Submissions will be treated as public documents unless provided and received in confidence, subject to the requirements of the Freedom of Information Act 1992 (FOI Act), and may be quoted in full or in part in the EPA’s report. Why not Join a Group? If you prefer not to write your own comments, it may be worthwhile joining a group interested in making a submission on similar issues. Joint submissions may help to reduce the workload for an individual or group, as well as increase the pool of ideas and information. If you form a small group (up to ten people) please indicate all the names of the participants. If your group is larger, please indicate how many people your submission represents. Developing a Submission You may agree or disagree with, or comment on, the general issues discussed in the Environmental Review or the specific proposal. It helps if you give reasons for your conclusions, supported by relevant data. You may make an important contribution by suggesting ways to make the proposal more environmentally acceptable. When making comments on specific elements of the Environmental Review: Clearly state your point of view.

L09459, Rev 1, September 2010 Page i



Indicate the source of your information or argument if this is applicable. Suggest recommendations, safeguards or alternatives.

Points to Keep in Mind By keeping the following points in mind, you will make it easier for your submission to be analysed: Attempt to list points so that issues raised are clear.

A summary of your submission is helpful.

Refer each point to the appropriate section, chapter or recommendation in the

Environmental Review.

If you discuss different sections of the Environmental Review, keep them distinct and separate, so there is no confusion as to which section you are considering.

Attach any factual information you may wish to provide and give details of the source. Make sure your information is accurate.

Remember to include: Your name. Address. Date. The reason why you want your submission to be confidential. Information in submissions will be deemed public information unless a request for confidentiality of the submission is made in writing and accepted by the EPA. Submissions should be sent to the responsible authority, the Western Australian Planning Commission at the following address:

Department of Planning 11 Pinjarra Road MANDURAH WA 6210 Attention: Dale Sanderson Or: [email protected] The closing date for submissions is: (date). If you have any questions on how to make a submission, please ring Dale Sanderson at the Department of Planning on (08) 9264 7777.

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SUMMARY

The Peel Region Planning Committee of the Western Australian Planning Commission proposed to initiate an amendment to the Peel Region Scheme Amendment 017/57 to: Rezone Lot 123 Tonkin Drive, Lot 185 North Yunderup Road, Lots 205 and 300 Towera

Road, Lot 544 Pinjarra Road and Portion of Towera Road, North Yunderup within the Peel Region Scheme from “Rural” zone to “Urban” zone.

Rezone Lots 19–23 Pinjarra Road, Lot 120 North Yunderup Road, Lots 122–127 Tonkin Drive, Lots 128–130 Walter Road, Reserve 35250, portion of Towera Road and portion of Lot 544 Pinjarra Road, North Yunderup, within the Peel Region Scheme from “Rural” zone to “Urban Deferred” zone.

Adjustments of the Regional Open Space reservation along Wilgie Creek.

Amend the scheme maps.

Amend the scheme text. The proposed amendment was referred to the Environmental Protection Authority (EPA) and an Environmental Review level of assessment was determined. The three environmental factors relevant to the scheme amendment identified by the EPA were: Water management. Murray River. Wetlands.

A District Water Management Strategy – North Yunderup (RPS, 2010) has been prepared over the site in accordance with Department of Water (DoW) requirements and the EPA instructions. A copy of the DWMS is included in Appendix 4. The DWMS identifies a range of commitments for the management of groundwater, surface water, flood events, nutrient export and monitoring and reporting requirements. The DWMS also models the phosphorus export rates from a range of different treatments types and concludes that the management of stormwater quality and hence groundwater quality is achievable using best management practices. The EPA’s objective for the maintenance of the integrity, ecological functions and environmental values of the Murray River can be met from future development through the prevention of direct discharge to the river, limiting development to outside of the 1 in 100 year floodway of the Murray River, and rehabilitation of the floodway adjacent to the amendment area.

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To reduce and manage direct and indirect potential impacts from the proposed development of the site to Wilgie Creek, restoration and rehabilitation of the foreshore and shoreline areas is proposed to protect and enhance Wilgie Creek values and significance. The Management Plan – Wilgie Creek East document has been prepared by RPS that details how management of Wilgie Creek will occur with the development of adjacent land. A copy of the Management Plan is included in Appendix 3. The key management recommendations and outcomes from the implementation of the Management Plan will ensure compliance with the EPA’s objective of maintenance of the integrity, ecological functions and environmental values of wetlands, and ensuring that odour from wetlands will not adversely affect the health, welfare and amenity of people by meeting statutory requirements and acceptable standards. It is proposed that the implementation of the commitments will be captured through the EPA’s formal Environmental Review and provisions of the proposed Town Planning Scheme amendments 216 and 233. The provisions can then be implemented at subdivision stage. It is not seen as appropriate for detailed planning to be undertaken and “locked in” at this early stage and hence precluding future refinement and improvement in outcome. TPS provisions carry the same force in law as PRS provisions with similar audit and enforcement mechanisms to ensure an outcome. RPS considers there are no environmental issues identified through this assessment of the proposed Peel Region Scheme that can not be adequately managed to meet the EPA’s objectives.

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LIST OF ACRONYMS

CCW Conservation Category Wetland DEC Department of Environmental and Conservation DoW Department of Water EPA Environmental Protection Authority ER Environmental Review MUW Multiple Use Wetland ODP Outline Development Plan PRS Peel Region Scheme REW Resource Enhancement Wetland SPP Statement of Planning Policy TPS Town Planning Scheme WAPC Western Australia Planning Commission

L09459, Rev 1, September 2010 Page v



TABLE OF CONTENTS Page

SUBMISSION PROCESS .......................................................................................... i

SUMMARY ............................................................................................................... iii

LIST OF ACRONYMS .............................................................................................. v

1.0 INTRODUCTION ....................................................................................... 1

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

1.2 Responsible Authority ........................................................................................... 2

1.3 Environmental Review Process ............................................................................ 2

1.4 Structure of Environmental Review .................................................................... 2

1.5 Statutory Requirements ....................................................................................... 3

2.0 PROPOSAL .................................................................................................. 5

2.1 Peel Region Scheme .............................................................................................. 5

2.2 Town Planning Scheme Amendment .................................................................. 5

2.3 Outline Development Plan ................................................................................... 6

3.0 ENVIRONMENTAL FACTORS RELEVANT TO SCHEME ................... 7

3.1 Water Management .............................................................................................. 7

3.1.1 Environmental Significance and Value ......................................................................................... 7

3.1.2 EPA Objective ................................................................................................................................. 7

3.1.3 Applicable Legislation, Polices or Guidelines ............................................................................ 7

3.1.4 Existing Environment ..................................................................................................................... 7

3.1.5 Potential Impacts ........................................................................................................................... 10

3.1.6 Management Strategies ................................................................................................................ 10

3.1.7 Predicted Outcome ...................................................................................................................... 15

3.2 Murray River ........................................................................................................ 15

3.2.1 Environmental Significance and Value ....................................................................................... 15

3.2.2 EPA Objective ............................................................................................................................... 16

3.2.3 Applicable Legislation, Polices or Guidelines .......................................................................... 16

3.2.4 Existing Environment ................................................................................................................... 17


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3.2.6 Management Strategies for Murray River ................................................................................ 18


3.3 Wetlands .............................................................................................................. 19

3.3.1 Environmental Significance and value ....................................................................................... 19

3.3.2 EPA Objective ............................................................................................................................... 20

3.3.3 Applicable Legislation, Polices or Guidelines .......................................................................... 20

3.3.4 Existing Environment ................................................................................................................... 21


3.3.6 Management Strategies ................................................................................................................ 26


4.0 MECHANISM FOR ENFORCEMENT OF COMMITMENTS ............... 35

5.0 REFERENCES ............................................................................................ 37

L09459, Rev 1, September 2010 Page vii



TABLES (contained within report text) Page

Table 1: Geomorphic Dataset Classification Information – within and adjacent to Project Site ........................................................................................................................ 25

FIGURES (compiled at rear of report)

Figure 1: Site Location

Figure 2: Proposed PRS Amendment Area

Figure 3: Peel Region Scheme Zoning

Figure 4: Town Planning Scheme Zoning

Figure 5: Outline Development Plan

Figure 6: Concept Outline Development Plan for Lot 300 and 544

Figure 7: Groundwater Monitoring Bores

Figure 8: 1 in 100 Year Floodway and Flood Fringe Mapping

Figure 9: DEC Wetland Mapping

Figure 10: Regional Surface Water Features

Figure 11: Topography

Figure 12: Vegetation Condition

Figure 13: ASS Risk Mapping

L09459, Rev 1, September 2010 Page viii



PLATES (contained within report text) Page

Plate 1: Wilgie Creek Eastern End ................................................................................................ 8

Plate 2: Wilgie Creek near North Yunderup Road Bridge ...................................................... 8

Plate 3: Fringing Vegetation of the Murray River near the Wilgie Creek Pump Station ................................................................................................................................. 17

Plate 4: Road Severing the “Spur” from Wilgie Creek, looking West .............................. 22

Plate 5: Road Severing Site from Wilgie Creek looking East and Showing the Disconnect between Wilgie Creek and the “Spur” ................................................ 22

Plate 6: Panoramic Looking South-west across the Spur of Wilgie Creek ....................... 24

Plate 7: Panoramic Looking East across the Spur of Wilgie Creek .................................... 24

APPENDICES

APPENDIX 1: Environmental Review Instructions

APPENDIX 2: Environmental Review Process

APPENDIX 3: Management Plan – Wilgie Creek East

APPENDIX 4: District Water Management Strategy – North Yunderup

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L09459, Rev 1, September 2010 Page 1

1.0 INTRODUCTION

The Peel Region Planning Committee of the Western Australian Planning Commission proposed to initiate an amendment to the Peel Region Scheme Amendment 017/57 to: Rezone Lot 123 Tonkin Drive, Lot 185 North Yunderup Road, Lots 205 and 300

Towera Road, Lot 544 Pinjarra Road and Portion of Towera Road, North Yunderup within the Peel Region Scheme from “Rural” zone to “Urban” zone.

Rezone Lots 19–23 Pinjarra Road, Lot 120 North Yunderup Road, Lots 122–127 Tonkin Drive, Lots 128–130 Walter Road, Reserve 35250, portion of Towera Road and portion of Lot 544 Pinjarra Road, North Yunderup, within the Peel Region Scheme from “Rural” zone to “Urban Deferred” zone.

Adjustments of the Regional Open Space reservation along Wilgie Creek.

Amend the Scheme Maps.

Amend the Scheme Text. The proposed amendment was referred to the Environmental Protection Authority (EPA) in August 2009 and on 21 September 2009 the EPA decided to assess the scheme amendment. This Environmental Review (ER) has been prepared in accordance with the EPA’s Instructions that were issued on 23 October 2009 (Appendix 1).

1.1 Project Background

PRDnationwide Project Marketing is seeking to develop Lots 300 and 544 Pinjarra Road, Yunderup and similar development intentions have been indicated for Lots 205 Walter Road and 185 North Yunderup Road. An additional sixteen special rural lots have also been included within the PRS amendment area as a consolidated and logical development node for the extension of the existing North Yunderup townsite. The amendment area is currently zoned as “Rural” under the Peel Region Scheme (Figure 3) and “Rural” and ‘special Rural” under the Shire of Murray Town Planning Scheme No. 4 (Figure 4). An amendment to the Shire of Murray’s Town Planning Scheme will also need to be gazetted prior to development approval within the amendment area. An Outline Development Plan over the entire amendment areas was created in 1999 (Figure 5), this has been further refined as a concept for Lots 300 and 544 in Figure 61.

1 This concept ODP should be read as concept only, the “inlet” and revised floodway do not form part of this PRS amendment proposal.



1.2 Responsible Authority

The Responsible Authority for the amendment to the Region Scheme is the Peel Region Planning Committee of the Western Australian Planning Commission. PRDnationwide as prospective developer within the amendment area; is assisting in the provision of the necessary environmental information to allow progression of the amendment.

1.3 Environmental Review Process

The Peel Region Planning Committee of the Western Australian Planning Commission proposed to initiate an amendment to the Peel Region Scheme Amendment 017/57. The proposed amendment was referred to the Environmental Protection Authority (EPA) in August 2009 and on 21 September 2009 the EPA decided to assess the scheme amendment. This Environmental Review has been prepared in accordance with the EPA’s Instructions that were issued on 23 October 2009 (Appendix 1). The intent of this report is to provide the EPA with information and advice regarding the environmental factors listed in the ER instructions to assist the EPA’s formal recommendation to the Minister for the Environment with regards to the environmental acceptability of the proposed scheme amendment. Additionally, this ER is to detail the implications of the proposed amendment so the EPA can obtain public comment on the potential environmental impacts of the proposal. The ER is made available for public comment. Advice on how to make a submission can be found in the front of this report. All submissions made during the comment period will be considered by the Western Australian Planning Commission (WAPC), which will prepare a response. Submissions and the WAPC response, along with the ER will then be considered by the EPA. The EPA will report to the Minister for Environment. The EPA’s advice will be published and be open to for two week appeal period. The Minister for Environment and Minister for Planning will then decide whether the amendment can be implemented, and if so, the environmental conditions that would apply. See Appendix 2 for the Environmental Review Process for scheme amendments.

1.4 Structure of Environmental Review

This ER follows the structure and content requested by the EPA in their Environmental Review Instructions. It details the existing environmental factors relevant to the proposed scheme amendments, the potential environmental impacts and proposes management strategies to prevent any adverse environmental impacts.




The following objectives were identified in the EPA’s instructions: To maintain the quantity of water (surface and ground) so that existing and

potential environmental values, including ecosystem maintenance, are protected.

To ensure that water quality does not adversely affect environmental values or the health, welfare and amenity of people and land uses by meeting statutory requirements and acceptable standards.

To maintain the integrity, ecological functions and environmental values of the Murray River.

To maintain the integrity, ecological functions and environmental values of wetlands, and ensure that odour from wetlands do not adversely affect the health, welfare and amenity of people by meeting statutory requirements and acceptable standards.

1.5 Statutory Requirements

The Responsible Authority, is not only required to comply with the Environmental Protection Act 1986, but also a variety of other State and Federal legislation. A non-exhaustive list of relevant applicable legislation is provided below. Aboriginal and Torres Strait Islander Heritage Protection Act 1984 Aboriginal Heritage Act 1972 Conservation and Land Management Act 1984 Contaminated Sites Act 2003 Environmental Protection (Noise) Regulations 1997 Environmental Protection (Swan Coastal Plain Lakes) Policy 1992 Fire and Emergency Services Authority of Western Australia Act 1998 Harbours and Jetties Act 1928 Health Act 1911 and associated Regulations Heritage Act of Western Australia 1990 Jetties Act 1926 Land Administration Act 1997 Land Drainage Act 1925 Local Government Act 1995 Metropolitan Water Supply, Sewerage and Drainage Act 1909 Native Title Act 1993 Native Title (State Provisions) Act 1999 Planning and Development Act 2005 Rights in Water and Irrigation Act 1914 Soil and Land Conservation Act 1945 Waterways Conservation Act 1976 Wildlife Conservation Act 1950








2.0 PROPOSAL

2.1 Peel Region Scheme

The Peel Region Scheme (PRS) is a large region planning scheme which guides land use in the Peel Region. This area includes the local government boundaries of the City of Mandurah and the shires of Murray and Waroona. The PRS defines the future use of land, dividing it into broad zones and reservations. It requires local government town planning schemes to provide detailed plans for their respective parts of the region. These schemes must be consistent with the PRS. This plan has been in operation since March 2003 and provides the legal basis for planning in the Peel region (Planning, 2010). The amendment area is currently zoned “Rural” and the amendment will seek changes to “Urban” and “Urban Deferred” and small areas of Regional Open Space along Wilgie Creek, as shown in Figure 2. The proposed ROS boundary, as determined by the Western Australian Planning Commission, is based on a combination of the existing ROS boundary for Wilgie Creek and the 1:100 year floodway mapping (whichever provides the greater distance to Wilgie Creek), excluding the existing dwelling on Lot 185 and allowing for road access from Lot 185 to North Yunderup Road. The existing floodway mapping has been compared to proposed floodway mapping from the Department of Water’s (DoW) recently released draft Floodplain Development Strategy (DoW, 2010). The revised modelling completed for the study is largely consistent with the earlier flood studies (PWD, 1984 and WAWA 1991). However the floodway has been adjusted in a number of areas due to the revised flood modelling technique and improved topographical information. As the flood levels have been reduced, the width of the floodway of the Murray River to the east of the site has also been reduced slightly. The location of the floodway along Wilgie Creek does not appear to have altered from the flood mapping currently available. This is discussed in more detail in the District Water Management Strategy – North Yunderup (refer Appendix 4).

2.2 Town Planning Scheme Amendment

The amendment area is zoned “Rural” and “special Rural” under the Shire of Murray Town Planning Scheme No. 4. The TPS will be required to be amended to be consistent with the PRS if / when the PRS amendment is gazetted. Two proposed TPS amendments within the PRS amendment area are currently the subject of assessment by the EPA.




2.3 Outline Development Plan

A draft Outline Development Plan (ODP) has been prepared to show how development across the amendment area could work (Figure 5) and the concept further refined in Figure 6. The ODP includes both residential and commercial elements and a primary school site. A feature of the ODP is the village centre which will be located near to the Murray River. The village centre aims to provide a range of commercial facilities and mixed use buildings (such as café, shops, and civic buildings), filling a need as identified in a study undertaken of the local community and surrounding areas in the scoping stage of the ODP. The ODP identifies various recreational areas and conservation areas including a Resource Enhancement wetland along Pinjarra Road which will be rehabilitated and restored as part of development of the adjacent land, along with parks and recreation Public Open Space along the foreshore of Wilgie Creek. The proposed treatment of the foreshore area is described in the Management Plan – Wilgie Creek East (RPS, 2010) and included as Appendix 3.




3.0 ENVIRONMENTAL FACTORS RELEVANT TO SCHEME

3.1 Water Management

3.1.1 Environmental Significance and Value

Groundwater and surface water are valued as sources of domestic, rural, recreation and industrial water. Groundwater is also valued for its interaction with surface water and the role it plays in the hydrogeological cycle. Groundwater can be valued for its role in groundwater dependant ecosystems such as; wetlands, estuarine environments, and base flow in streams and creeks.

3.1.2 EPA Objective

To maintain the quantity of water (surface and ground) so that existing and potential environmental values, including ecosystem maintenance are protected. To ensure that water quality does not adversely affect environmental values or the health, welfare and amenity of people and land uses by meeting statutory requirements and acceptable standards.

3.1.3 Applicable Legislation, Polices or Guidelines

Department of Environment, 2004. Stormwater Management Manual for Western Australia.

Environmental Protection Authority, 2008. Water Quality Improvement Plan for the Rivers and Estuary of the Peel – Harvey System Phosphorus Management.

Government of Western Australia, 1992. Environmental Protection (Peel Inlet – Harvey Estuary) Policy Approval Order 1992.

Western Australian Planning Commission, 2005. Statement of Planning Policy – Water Resources.

3.1.4 Existing Environment

The Department of Water’s Perth Groundwater Atlas, indicates that groundwater beneath the site ranges between 0 and 1 metre below ground level. Groundwater monitoring has been undertaken from a series of bores across the majority of the site for at least two years (Figure 7). The groundwater monitoring data indicates that the project area has typical seasonal variations of groundwater levels and the recorded levels are generally consistent with the Perth Groundwater Atlas.




Wilgie Creek acts as a floodway for the Murray River in a 1 in 100 year flood event. Plates 1 and 2 show Wilgie Creek.

Plate 1: Wilgie Creek Eastern End Plate 2: Wilgie Creek near North

Yunderup Road Bridge

Floodway and flood fringe mapping across the amendment area is shown in Figure 8. No development that impedes flood flow is allowed within the defined floodway. The remaining area of the project site falls within the flood fringe in which development is permitted, but must have minimum habitable floor level of at least 0.5 metres above the 100 year flood level. In 2006, RPS undertook a hydrogeological assessment to determine the groundwater dynamics between the site and its relationship with wetlands and rivers. The study found that groundwater flow typically follows the topography of the site and flows towards a wetland depression at the central northern end of the site. In the eastern portion of the site, the groundwater level is relatively high. Groundwater discharges into the Murray River to the east and south of the site. Groundwater interaction with Wilgie Creek and the Murray River is heavily dependant on the time of year. During high flood events Wilgie Creek acts as an overflow pathway for the Murray River. During winter / spring the groundwater level rises as a result of increased rainfall, until it exceeds the base level of Wilgie Creek causing the creek to act as a drain and discharges water to a marshland at the western end of the creek which drains to the Peel–Harvey Estuary. At times of low rainfall, Wilgie Creek levels drop and pools form. Water remaining in these pools becomes stagnant, nutrients concentrate causing algal blooms that subsequently breakdown causing anoxic conditions and noxious odours. A Resource Enhancement sumpland on the northern border of the amendment area adjacent to Pinjarra Road contains standing water for the wetter months of the year and provides water bird habitat of limited value. Groundwater monitoring was undertaken at ten sites towards the eastern end of the creek. The temperature, pH, electrical conductivity (EC), redox, and dissolved oxygen levels were tested on site and groundwater samples taken from all sites were analysed for Nitrate, Ammonia, Nitrite, Total Kjeldahl Nitrogen, Total Nitrogen, Filtered




Reactive Phosphorous, and Total Phosphorous. The groundwater on site contained very high levels of dissolved solids and chloride concentrations (indicating salinity). One site showed elevated trace metal concentrations possibly indicating oxidation of Acid Sulfate Soils. RPS (2010) prepared the Management Plan – Wilgie Creek East that details management commitments for Wilgie Creek and responsibilities that will provide short and long-term improvement in the ecological health of Wilgie Creek, should development be approved for the area.

3.1.4.1 Acid Sulfate Soils

The Department of Environment and Conservation (DEC) acid sulfate soils (ASS) risk mapping (Figure 13) shows that a majority of the site is mapped as having a “High to moderate” risk of ASS. An area in the north-east of the site (Lot 544) is mapped as having a “Moderate to Low” risk of ASS. RPS undertook a Detailed Site Assessment (DSA) for Acid Sulfate Soils (ASS) at Lot 300 and 544 in June 2005 (RPS BBG 2006) to investigate the presence and environmental risks associated with the potential disturbance of ASS during the development. The drilling was completed by Golders Associates at twenty two test locations using a push core drill rig to a depth of 5 m. Groundwater quality samples from five of the test sites were also taken to assess for Potential ASS and Actual ASS. The DSA soil investigation confirmed the presence of both Potential ASS and Actual ASS at the site. Further site assessment for ASS will be completed over the remaining areas of the site following the proposed rezoning. Following the results of the investigations, an ASS and Dewatering Management Plan (ASSDMP) will be prepared to identify appropriate management and treatment options for any disturbed ASS. This information will be provided to the DEC for approval and details will be provided in future urban water reports. However as the majority of the site will require fill it is unlikely there will be significant disturbance of ASS associated with future development.

3.1.4.2 Phosphorus Model

A Phosphorus Export Model was used to determine the export rate for phosphorus (P) from the site. The model is based on the Geoprocc Model (Gerritse, 1995, 1996a, 1996b, 2002; Gerritse et al., 1995a, 1995b) for the reaction rate of phosphate through sandy soils of Western Australia (WA). It must be emphasised that the main potential phosphorus export mechanism from the site is through infiltration to groundwater. There will be no direct stormwater run-off from the site to the Wilgie Creek or wetlands post-development. Detail about the Geoprocc Model and its application to the site can be found in the DWMS.




The North Yunderup site has variable existing soils types and has had previous nutrient loading, mainly from fertiliser application and livestock manure. On-site soil analysis was used to determine the soil PRI and soil isotherm properties from the range of different soil types across the site. The soil analysis confirmed the Phosphorus Retention Index (PRI) was highly variable across the site ranging from 0.7 mL/g to 1000 mL/g. The spatial distribution of PRI correlates with the distribution of soil types, with reworked Bassendean sands providing very low PRI values and Guilford formation providing very high PRI values. Depth to groundwater is generally low across the site, which resulted in generally low P retention across the site. The predictive post-development phosphorus modelling results are discussed in Section 3.1.6.1.

3.1.5 Potential Impacts

There are a variety of potential impacts on the groundwater both within the proposed development boundary and surrounding area. They are listed below: Potential increase in nutrient and other pollutant export from development into the

groundwater system and associated wetlands and watercourses.

Potential changes to the groundwater hydrology.

Potential rise in groundwater levels, which could lead to localised flooding or waterlogging.

Potential impact from dewatering associated with construction, causing adverse impacts on wetlands and watercourses.

3.1.6 Management Strategies

The management strategies to prevent unacceptable impacts to groundwater are discussed in detail in the District Water Management Strategy – North Yunderup (RPS, 2010). The key elements of the DWMS are described below.

3.1.6.1 Post-development Phosphorus Model

Soak Wells – 2% Area Ratio

The modelling results demonstrate that a drainage strategy that only proposed soak wells with soil amendment would be relatively ineffective at providing a long-term water quality treatment option as the surface area beneath soak wells is small. The results indicate that to provide 100 years of stormwater treatment using soak wells only, would require 1.6 m to 2.1 m of amended soil to be placed beneath the soak wells.




This is therefore a less practical option. The proposed drainage strategy should therefore utilise a combination of soak wells and swale/basins to achieve sufficient stormwater treatment. Swales – 6% Area Ratio

The modelling indicates that the amendment of soils within the infiltration drainage system to a realistic depth (0.3 cm) is a practical and achievable option to provide for the treatment of stormwater on site. As the soil types vary across the site with the eastern side containing the Guildford formation and the western side containing Bassendean sands the two areas of the site require different management approaches. The modelling shows that by using a fill with a PRI of 30 ml/g beneath the swales, the eastern side of the site will require 0.3 m of amended soil fill beneath the base of the drainage swales/basins. While 0.7 m of amended fill is required beneath the swales/basins on the western side of the site. The modelling results have been reflected in the management strategies presented below.

3.1.6.2 Water Sensitive Urban Design

Water Sensitive Urban Design (WSUD) through the use of Best Management Practices (BMPs) will be used to achieve the following groundwater management objectives: Maintain groundwater levels and quality at pre-development levels, and if possible,

improve the quality of water leaving the development area. Prevent an unacceptable quality of water entering the groundwater.

Minimise ecological impacts associated with the change in land use.

3.1.6.3 Separation Distances

As the site is located in the flood fringe of the Murray River, there is a DoW requirement to raise ground levels on site 0.5 m above the existing 1:100 ARI flood levels to provide adequate flood protection at the site. This will require post-development ground levels being raised to 3.63 m AHD in the east of the site to 2.73 m AHD in the west based on the 1984 flood mapping. The raising of the ground level will also provide greater than 1.2 m vertical separation distance from the modelled AAMGL levels to habitable lot levels.




3.1.6.4 Groundwater Quality

The increase in separation distance to groundwater and the use of a sand based fill will provide further treatment of the stormwater as it infiltrates through the soil profile, as added fill will provide further soil particles for phosphorus to bind to. Soils will be amended within stormwater treatment devices to ensure that an adequate PRI soils will be used, in accordance with the EPA’s Water Quality Improvement Plan. In addition the following design objectives and management practices will be implemented on site: The levels of fertilisers and pesticides applied to the site will be minimised and

controlled through the use of native vegetation and correct fertiliser operation and maintenance in the POS area.

Healthy and well established plants will be maintained, particularly in vegetated drainage systems.

The use of soil amendment in infiltration swales and basins, where required, in order to encourage phosphorus retention, prior to infiltrating to groundwater.

The use of vegetation within the infiltration swales to remove nitrogen through plant uptake from stormwater, prior to infiltrating to groundwater.

Monitoring of groundwater levels and quality entering and leaving the site to verify that the site is not having adverse impacts on the groundwater levels or quality.

Details of the fill requirements will be comprehensively addressed in the future Local Water Management Strategy (LWMS) and Urban Water Management Plan (UWMPs).

3.1.6.5 Impacts on Groundwater Dependant Ecosystems

There is one Resource Enhancement Wetland (REW) and three Conservation Category Wetlands (CCWs) located in the immediate vicinity of the site (Murray River, Wilgie Creek and Black Lake). To maintain local groundwater levels and hence the groundwater dependant ecosystems, stormwater will be infiltrated on site, where possible, to mimic the pre-development hydrological process of rainfall infiltration and groundwater recharge. The pre-development rainfall infiltration regime is discussed further in the DWMS (RPS, 2010). As groundwater movement in the region is generally in a west to south-west direction towards the Peel Inlet, Black Lake and the REW are not largely impacted by the groundwater as they are up-gradient of the flow.




Achieving the groundwater management objectives will ensure that no ecosystems receiving groundwater from the site are significantly impacted.

3.1.6.6 Water Quality Improvement Plan

The EPA’s Water Quality Improvement Plan (WQIP) for the Rivers and Estuary of the Peel – Harvey System – Phosphorus Management was released in November 2008 (EPA, 2008b). The objective of the WQIP is to limit the level of phosphorus reaching the Peel–Harvey waterways to 75 tonnes per year (currently 145t/a). There are thirteen actions stated in the WQIP which are shown below. Actions 1, 2, 4, 5, 6 and 7 relate to agricultural land or existing urban areas and hence not relevant to proposed urban development. All requirements, and mechanisms by which this proposal can and will address the issues in the WQIP are clearly demonstrated below. 1. Rural fertiliser management N/A. 2. Rural soil amendment N/A. 3. Urban fertiliser management. Waterwise and low fertiliser education packs will be made available for new residents to the area for use when designing their own gardens. Small areas of turfed POS are proposed to provide the recreational opportunities for residents. These are located out of sensitive areas and will use minimal fertiliser application. 4. Sewage management in existing homes, dwellings and Waste Water Treatment Plants Any existing homes that may be retained during subsequent development of the site will be connected to infill sewerage. 5. Zero discharge for licensed agricultural premises. N/A. 6. Improve other agricultural practices to reduce phosphorus discharges. N.A. 7. Reafforestation of agricultural lands. N/A.




8. All new development to be connected to reticulated sewerage or Alternative Treatment Unit.

All lots will be connected to sewerage. 9. Urban Soil Amendment The site will require fill over much of the development area. The fill to be used will be amended (if necessary) to achieve a minimum 10 mL/g PRI over the development area and 30 mL/g within swales and basins (refer to the DWMS in Appendix 4). 10. Incorporating measures into Local Planning Policies, Strategies and Planning Conditions and

State policies. Best Management Practices will be used in the treatment of stormwater drainage across the site. This is discussed in more detail in the DWMS along with the supporting phosphorus model for the site. The DWMS has been prepared in accordance with the DoW’s Better Urban Water Management framework and a Local Water Management Strategy and Urban Water Management Plan will be produced for development areas within the amendment area as more detailed planning occurs. This approach is also supported through the Shire of Murray’s “Local Planning Policy No. 50 Water Sensitive Urban Design” which is consistent with the “State Planning Policy 2.9 – Water Resources”. 11. Water Sensitive Urban Design Refer to response in Point 10 above. 12. Drainage Reform The site shows evidence of historical drainage design that did not recognise the importance of wetland areas within the landscape and subsequent ecological damage to these systems. The constructed channels assist in the transport and excess water and sediment to the Murray River and Wilgie Creek in particular that has contributed to the current poor state of Wilgie Creek. Future development will put in place a managed stormwater treatment system that will maintain pre-development flow to these important systems but will treat stormwater prior to infiltration or flow off site. This is consistent with the EPA’s target of drainage reform within the Peel Harvey Catchment.

3.1.6.7 Wetland and Waterway Protection and Revegetation

Extensive revegetation of riparian areas and rehabilitation of the wetland on Lot 544 is part of subsequent development that is proposed after the PRS amendment is approved. This is discussed in more detail in the Wilgie Creek Management Plan that is included in Appendix 3.




3.1.7 Predicted Outcome

The modelling has indicated that management of the stormwater quality, and hence groundwater quality, is achievable using best management practices. It is important to note that the modelling and management approaches can be further refined in the LWMS to accurately determine the soil amendment requirements and detail the type and specifications of the BMPs to be used on site. With implementation of the management measures outlined above the EPA’s following objectives can both be achieved: Maintaining the quantity of groundwater so that existing and potential

environmental values, including ecosystem maintenance are protected.

Ensuring that water quality does not adversely affect environmental values of the health, welfare and amenity of people and land uses by meeting statutory requirements and acceptable standards.

3.2 Murray River

3.2.1 Environmental Significance and Value

The Murray River is a significant landmark in the Peel Region and the state of Western Australia. It is a significant visual and biophysical feature of the surrounding local landscape and has a range of environmental values to be protected. During stakeholder workshops for the preparation of the EPA’s Water Quality Improvement Plan for the Rivers and Estuary of the Peel–Harvey System – Phosphorus Management there were four environmental values that were identified for the Peel–Harvey Estuary and tidal reaches of the three main rivers, including the Murray River. The environmental values identified were:

3.2.1.1 Aquatic Ecosystem Health

The Murray River has value for its ecosystem health, including the biodiversity and habitat it provides to flora and fauna, both aquatic and terrestrial. It provides a corridor for wildlife and refuge habitat for many species through the year, and especially in times of drought. The Murray River is also valued for its contribution to life support systems, such as nutrient cycling, energy and water flows, groundwater recharge, and filtration and breakdown of some pollutants and nutrients. However, the water quality of the Murray River is under significant pressure from catchment land use leading to high nutrient run-off into the river and ultimately to the water of the Peel–Harvey Estuary. Agricultural land use has also seen extensive clearing within the catchment over the last 100 years and there is little good quality riparian vegetation remaining on the banks of the river.




3.2.1.2 Aquaculture and Human Consumption of Aquatic Foods

Although commercial aquaculture based activities are uncommon in this vicinity of the Murray River there is an assumption that fish or prawns etc caught in the area are safe for human consumption.

3.2.1.3 Recreation and Aesthetic – Primary, Secondary, Visual Amenity

The Murray River is an attractive recreational asset. A number of water-based activities are undertaken on the Murray River such as boating, canoeing, fishing, swimming, camping, bushwalking, sightseeing, and picnicking making riverine landscapes highly valued for recreational activities.

3.2.1.4 Cultural and Spiritual – Sacred Sites, Heritage Sites

Typically rivers in the south-west of WA are spirituality significant and highly valued by the Indigenous community. The Murray River is valued by the Indigenous community as an historical food source, place of shelter, ceremony and settlement. The Murray River is a registered Site of Significance (site number 3537) and is valued as a mythological site. In addition to the values associated with the waterway of the Murray River, there are a range of other values associated with the proximity to the river. These include the function of the floodway (including Wilgie Creek) in minimising the upstream areas inundated during major flood events by draining away floodwaters and the value of the foreshore area as riparian habitat. Although there has been significant damage to the fringing foreshore vegetation and habitat along the Murray River, primarily as a result of stock grazing pressure and also urban pressure to maximise the scenic value of the river, there is opportunity to rehabilitate the riparian zone and provide for more sensitive and appropriate passive recreational use of the foreshore area.

3.2.2 EPA Objective

To maintain the integrity, ecological functions and environmental values of the Murray River.


Western Australian Planning Commission, 2005. Statement of Planning Policy – Water Resources.






The Harvey River is one of three major waterways that drain into the Peel–Harvey Estuary. It is approximately 90 km in length and starts near Mount Keats. The project site borders the Murray River for about 260 metres along the project’s eastern boundary near to the eastern end of Wilgie Creek and approximately 450 m from its entry into the Peel–Harvey Estuary System. The Murray River ranges from 50 m in width to 100 m adjacent to the project site (RPS, 2007). According to the Department of Environment and Conservation (DEC) Geomorphic Wetlands Swan Coastal Plain dataset, the Murray River is classified as a Conservation Category Wetland (river) (UFI 3953) and is currently zoned Waterways under the Peel Region Scheme. The riparian vegetation along the banks of the Murray River adjacent to the amendment area has been reduced over time to a single row of well established Eucalypts with an understorey of exotic grasses.

Plate 3: Fringing Vegetation of the Murray River near the Wilgie Creek Pump

Station





If not adequately managed, urban development has the potential to cause environmental degradation to waterways, reduce water quality and alter flow characteristics. This in turn can have implications for ecological, economic and social values on site as well as the surrounding areas, such as the Peel–Harvey Estuary. Below is a list of potential impacts associated with developed adjacent to watercourses: Deterioration of water quality due to increases in nutrient export from the

development site.

Alteration of flow rates and dynamics, with particular regard to flood risk and erosion from the proposed inlet.

Floodway alteration and increase risk.

Stormwater flows in to the Murray River and Peel–Harvey Estuary.

Increase in sediment loads.

Potential contamination of groundwater

3.2.6 Management Strategies for Murray River

There will be no direct drainage into the Murray River from this development which will be a significant improvement from the current uncontrolled run-off from surface water flow across cattle grazing paddocks. DoW mapping shows the floodway of the Murray River joins up with Wilgie Creek during a 1 in 100 year flood event. The extent of the mapped floodway is shown in Figure 8. No development that impedes floodflow is allowed within the mapped floodway, as a result any development subsequently associated with this PRS amendment area would need to be set back at least 100 m from the Murray River. This area would be rehabilitated to improve the habitat value and may allowed controlled access for passive recreational use along fenced, dual use paths that also provides pedestrian links to the existing North Yunderup community. The responsibility for implementation of rehabilitation works and public facilities would fall to the developer of the site. The detailed rehabilitation plan and provision of public facilities will be determined in consultation with the Shire of Murray and detailed in subsequent subdivision designs for the area. Treatment of the foreshore area along Wilgie Creek is detailed in the Management Plan – Wilgie Creek East (RPS, 2010) that has been included as Appendix 3.





With the removal of direct discharge to the river and rehabilitation of the floodway area between future development and the Murray River there will be an increase in ecological function and environmental values of the riparian zone in the vicinity of the proposed development which will be appropriately protected in perpetuity. Detailed rehabilitation design, public facilities, management and maintenance responsibilities etc will be determined in consultation with the Shire of Murray at subdivision stage. The EPA’s objective to maintain the integrity, ecological functions and environmental values of the Murray River will be met through the proposed rezoning and subsequent development in accordance with the management strategies described above.

3.3 Wetlands

3.3.1 Environmental Significance and value

There are three Conservation Category wetlands and one Resource Enhancement wetland that occur on or adjacent to the proposed amendment area (Figure 9). This includes Wilgie Creek (UFI 15479), adjoining Wilgie Creek and encroaching in the western margins of the amendment area is UFI 3847 and the Murray River is the third CCW (UFI 14622). There are also two CCWs on the northern side of Pinjarra Road, outside of the amendment area. The REW (UFI 14376) occurs in on the northern border of the amendment area adjoining the CCW north of Pinjarra Road. Most of the rest of the site is mapped as Multiple Use estuary peripheral wetland (UFI 14582). Wilgie Creek is a valued watercourse in the Yunderup region. Although significantly degraded due to surrounding historical land uses, it plays an important role in the hydrological regime of the surrounding area, at times of high rainfall. It possesses a variety of environmental values which are discussed in more detail below.

3.3.1.1 Ecosystem Health, Biodiversity and Habitat

Wetlands have value for ecosystem health, biodiversity and habitat they provide to a variety of aquatic species of flora and fauna, especially migratory waterbirds. Wetlands are also valued for their contribution to life support systems, such as nutrient cycling, groundwater recharge, and filtering sediments, nutrients, organic and inorganic matter and pathogens. This is particularly valuable in the Peel–Harvey Estuary system due to its eutrophication problems experienced over recent times. The Murray River, Wilgie Creek and the RE wetland are all significantly different types of wetlands and as a result provide a range of wetland and dampland habitats for different species.




3.3.1.2 Recreation

Wetlands have an intrinsic natural beauty and are an attractive place to recreate for many West Australians. Wetlands are popular for bird watchers and other passive recreational activities, such as picnicking, and walking. The western side of Wilgie Creek is well utilised for recreation but the REW, the eastern side of Wilgie Creek and the Murray River in the vicinity of the amendment area are currently restricted due to private ownership / access issues. This amendment will allow for development that will open these areas up for well managed public use.

3.3.1.3 Cultural Heritage

Wetlands on the Swan Coastal Plain are generally highly valued by the Indigenous community, as they where regularly used as meeting points and food collection. The Department of Indigenous Affairs has noted Site 3281, which falls within the project area, as having insufficient information for registration as a site of significance. It contains scattered artefacts, possibly indicating the site was once used as a camp.

3.3.1.4 Aesthetic

Wetlands in general are valued for their aesthetic value and characteristics such as beauty, tranquillity, natural and landscape setting. The aesthetic value of a wetland is influenced by their condition and health, as well as how they are valued as an asset within the community. Many wetlands on the Swan Coastal Plain are degraded and experience eutrophication problems and are not highly valued.

3.3.1.5 Water flow

Wetlands are valued as a contributor to the hydrological regime of the area, contributing to groundwater recharge and provide a natural hydrological balance in the landscape and help to provide protection against floods. Wilgie Creek forms part of the 1 in 100 year floodway of the Murray River assisting to shed water and reducing the maximum flood levels upstream.

3.3.2 EPA Objective

To maintain the integrity, ecological functions and environmental values of wetlands, and ensure that odour from wetlands do not adversely affect the health, welfare and amenity of people by meeting statutory requirements and acceptable standards.



Department of Environment and Conservation, 2008. “Guidelines and Checklist for

Preparing a Wetland Management Plan”.




Environmental Protection (Swan Coastal Plain Lakes) Policy 1992.

Environmental Protection Authority, 2004. Position Statement No. 4 – Environmental Protection of Wetlands.

Environmental Protection Authority, 2008. Guidance Statement 33: Environmental

Guidance for Planning and Development. Government of Western Australia, 1997. Wetlands Conservation Policy for Western

Australia.

Western Australian Planning Commission, 2006. Statement of Planning Policy 2.9 – Water Resources.

Western Australian Planning Commission, 2003. Statement of Planning Policy No. 2 –

Environment and Natural Resources Policy


Wilgie Creek is described as “estuary peripheral” in Hill et al (1996) and is assigned CCW management status in the DEC Geomorphic Wetlands Swan Coastal Plain dataset (Figure 9). Wilgie Creek and an associated buffer were resumed from Lots 300 and 544 Pinjarra Road and included within Regional Open Space in the Peel Region Scheme (PRS) in 2003. An approximate 500 m section of the creek, adjacent to Lot 185, is still within private ownership. Development of Lot 185 will see this area of land ceded over to public ownership. Wilgie Creek is approximately 2.5 km in total length and is connected to the Murray River only during flood conditions. The western end terminates south of Walter Road in a wetland / marshland area near the Estuary. Therefore during large flood events, Wilgie Creek forms part of the floodway of the Murray River. Also, when groundwater levels rise and exceed the base of Wilgie Creek elevation, Wilgie Creek acts as a drain and transports water to the Peel–Harvey Estuary. During low rainfall periods, water in Wilgie Creek forms pools. As the groundwater levels fall below the base elevation, these pools act as recharge to the superficial aquifer and groundwater flows south to the Murray River. Water remaining in the pools of Wilgie Creek is perched by sediment and increased algal growth coupled with evaporation begins to putrefy, adding to the odour problem. Wilgie Creek has a thin band of riparian vegetation on both north and south banks. The riparian vegetation primarily consists of mature Eucalyptus rudis, Melaleuca preissiana and M. rhaphiophylla, and very occasional Casuarina obesa (See Plates 1 and 2).





A small “spur” of Wilgie Creek exists at the eastern end of the creek. This spur appears to have been hydrologically disconnected from the creek by the construction of a track (Plates 4 and 5). The current and historical land use of the site has severely impacted the vegetation condition within the spur effectively removing the entire understorey from the area and introducing weeds. At present the site is covered in weeds and exotic grasses, and the native vegetation remaining (predominantly mature Eucalyptus rudis) is scattered through out the site. Rubbish and abandoned farm vehicles and equipment is also evident though the spur. The vegetation of this site has been classified as “Degraded” according to the Bush Forever (Western Australia Planning Commission, 2000) condition scale by RPS botanical staff in 2008. Refer to Plates 6 and 7 for panoramic views across the “spur”.

Plate 4: Road Severing the “Spur” from Wilgie Creek, looking West

Plate 5: Road Severing Site from Wilgie Creek looking East and Showing the

Disconnect between Wilgie Creek and the “Spur”

The “spur” no longer retains the environmental values associated with a CCW. While there will be rehabilitation of the “spur”, including removal of accumulated rubbish and contamination assessment, a 50 m buffer to the spur is not seen to be necessary to protect current values of this section of the creek.

Wilgie Creek Wilgie Creek spur




Wilgie Creek is part of a larger wetland system that extends both north including Black Lake and the Serpentine River, south to the Murray River, and west to the Estuary (Figure 10). Historical agricultural use of the foreshore area and the catchment area, including clearing, fertiliser application and grazing, and filling of adjacent lots have all significantly and permanently impacted on the functions and values of Wilgie Creek reducing its ecological function. The Resource Enhancement wetland in the northern end of the amendment area has also been significantly disturbed due to stock use and altered hydrology. The vegetation condition across the sumpland has been assessed using the condition scale described in Bush Forever and the majority of the site is described as “degraded” or “completely degraded” with only a small section of “good – degraded” condition vegetation on Lots 20 and 21 to the west (Figure 12). Agricultural drains were constructed from the sumpland in the mid-1980s to drain the wetland and allow year round agricultural use. Although the drains have now been decommissioned the extensive loss of vegetation through the wetland remains evident.



Plate 6: Panoramic Looking South-west across the Spur of Wilgie Creek

Plate 7: Panoramic Looking East across the Spur of Wilgie Creek




Table 1 indicates the DEC Geomorphic Wetlands Swan Coastal Plain dataset classification within and adjacent to the project site. The wetland locations are shown in Figure 9.

Table 1: Geomorphic Dataset Classification Information – within and adjacent to Project Site

UFI Number Wetland Type Management Category Location from the Site

3847 Estuary – Peripheral Conservation Along western boundary

3848 Sumpland Conservation From 60 m south-west

15479 Estuary – Peripheral(Wilgie Creek) Conservation Forms the southern boundary

14622 River (Murray River) Conservation Along eastern boundary to

600 m south

14593 Sumpland (Black Lake) Conservation 40 m north

14600 Palusplain Conservation 40 m north

14376 Sumpland Resource Enhancement Central northern section of site

14582 Estuary – Peripheral Multiple Use Covers a majority of site

15235 Estuary – Peripheral Multiple Use Approximately 80 m south

15702 Palusplain Multiple Use North-eastern corner of site extending north-east

Geomorphic Wetlands Swan Coastal Plain dataset, DEC, 2010


There are a variety of potential impacts on the categorised wetlands within the proposed development boundary. Inadequate buffer areas or poorly planned or managed development can lead to degradation of a wetland over time. A hydrological assessment undertaken by RPS Bowman Bishaw Gorham in 2006 identified a number of potential disturbances in or adjacent to the project area that could also cause potential impacts to the wetlands. They are listed below: Physical Changes: Potential physical changes to the hydrology, such as flow rates, flooding and

discharge volume.

Potential increase in excess nutrients. A key issue is the potential of increased excess of nitrogen and phosphorus, which are two major contributors to eutrophication and algal blooms, which is already identified as a major problem in the Peel–Harvey Estuary System.

Potential increase in sediment loads, resulting from earth works associated with the development.




Potential of disturbing acid sulfate soils.

Loss of flora and fauna habitat.

Increase in mosquitoes. Contamination: Possible contamination from trace metals, which are non-biodegradable and can

accumulate over time.

Possible contamination from asbestos cement material (typically from houses).

Possible contamination from solvents.

Possible contamination from Total Petroleum Hydrocarbons (TPH) which are constituents of diesel, petroleum, oil and grease.

Possible contamination from Polycyclic aromatic hydrocarbons (PAHs) from Oils, grease, solvents and degreasers.

Possible contamination from Polychlorinated biphenyls (PCBs) from refrigeration components.

3.3.6 Management Strategies

To reduce and manage direct and indirect potential impacts from the proposed development of the site to Wilgie Creek and the Resource Enhancement Wetland UFI 14376, restoration and rehabilitation of the foreshore and shoreline areas and the central core of UFI 14376 is proposed to protect and enhance both Wilgie Creek values and significance and enhance the currently degraded values of sumpland 14376. The portion of Multiple Use palusplain UFI 15702 that retains no significant environmental values is not proposed for retention. The Management Plan – Wilgie Creek East document has been prepared by RPS that details how management of Wilgie Creek will occur with the development of adjacent land. A copy of the Management Plan is included in Appendix 3. The key management recommendations and outcomes from the implementation of the Management Plan are outlined below:

3.3.6.1 Management of Wilgie Creek Water Quality

Refine Pumping Program

It is proposed to continue the strategy of maintaining water in Wilgie Creek and put in place a framework to fund the operation of pumps, periodic servicing and replacement




to ensure that resourcing is available for the ultimate management authority. With a more responsive and refined pumping program with both maximum and minimum creek levels set and computer controlled pumping times and self diagnosing problems it is believed a much better outcome for creek health can be delivered. Pump Infrastructure and Program

To fund the ongoing operation of pumps, servicing, periodic replacement and monitoring, a specified area rate can be considered across North Yunderup. It is proposed to remove the secondary pump and keep a second stand-by pump ready for installation in the event of failure or maintenance of the primary pump. In addition to upgrade of the pump infrastructure the following program is proposed: Undertake a detailed creek bed survey mapping.

Undertake a vegetation condition survey along the northern banks of Wilgie Creek

to track riparian health over time.

Identify the safe minimum level that will prevent the creek mud from being exposed to air and a maximum level will also be determined to prevent erosion or overtopping along the creek banks and maximise creek circulation to reduce algal blooms.

Install an electronic controller at both pumps that allows a creek level fluctuation between maximum and minimum level over a two week period, generally following natural tidal fluctuations and promoting maximum flushing.

Use one pump and keep one pump off site, to be installed in the event of failure of the primary pump or during routine maintenance.

Install pump alarms with SMS alerts when pump servicing or pump problems are encountered.

Undertake a baseline invertebrate monitoring program in Wilgie Creek and follow-up with annual monitoring for three years to track creek health.

Resourcing

The respective developers will be responsible for the implementation of works as described in the Management Plan – Wilgie Creek East (RPS, 2010). After the three year implementation and maintenance period by the developer, the Wilgie Creek management works are designed to be self funding through the use of a specified area rate over the North Yunderup community for as long as the supplementary pumping is required, however there is a need for administration of the program. It is proposed that




the Shire of Murray is best placed to collect the funds and administer the program. The developers would be responsible for establishing, running and maintenance of the Wilgie Creek management program the first three years where after it would be handed over to the Shire. Long-term Health Improvement

Part of the stated aim of the Wilgie Creek Restoration Strategy is improvement in the health of Wilgie Creek. This includes extensive rehabilitation and revegetation of the riparian zone of the creek. The WCRG has been instrumental in fencing and tree planting within the reserve, particularly on the southern side of the creek. It is proposed to undertake further replanting in the areas adjacent to the creek, both within the project area and in the adjacent Regional Open Space Reserve. Walk paths and fencing would also be installed to provide passive recreational opportunities but prevent access to sensitive areas. This would be the responsibility of the developer of the adjacent land. It is expected that with the removing of agricultural drainage into Wilgie Creek, summer supplementation pumping with a refined fluctuation range, extensive rehabilitation of riparian zone and buffer to Wilgie Creek together with improvement to ground and surface waters entering the creek that there will be an improvement in health of the system over time. It is also recognised that there is a very large store of anoxic organic rich sediments that are a contributing source to the odour problem in Wilgie Creek and will take many years to disperse. Monitoring The following monitoring program is proposed for Wilgie Creek by the proponent to track the success of restoration works and pumping over time: Undertake a baseline invertebrate and phytoplankton assemblage monitoring

program in Wilgie Creek and follow-up with annual monitoring for three years to track creek health.

Undertake a water quality monitoring program prior to commencement of pumping, shortly after commencement of pumping and prior to finishing pumping. Analysis should include physical parameters, nutrients and chlorophyll-a and will be at four locations along Wilgie Creek. Continue this program for three years to track changes over time.

Identify and GPS reference four sampling points along Wilgie Creek and determine approximate sediment depth. Measure this depth annually for three years.




A visual and photographic record of riparian vegetation health should also be undertaken annually for three years.

Prepare a brief annual report after pumping has ceased summarising results for the year, identifying any significant trends and any recommendations for refinement of monitoring program. A copy of this report to be provided to the Shire of Murray, the DoW and the WCRG. Three annual reports should be prepared.

At hand over to the Shire of Murray, there will be a refinement of the monitoring requirements based on the results obtained from the above program.

3.3.6.2 Rehabilitation/Revegetation

The foreshore vegetation condition of the northern banks are mostly degraded and require rehabilitation. Rehabilitation will involve re-establishing foreshore vegetation through planting of local native species. Where possible, seed will be collected from existing foreshore vegetation, along Wilgie Creek, to maintain genetic provenance. Seed collection will be undertaken by a rehabilitation specialist who specialises in native vegetation rehabilitation. The rehabilitation areas along Wilgie Creek are detailed in the Management Plan – Wilgie Creek East.

3.3.6.3 Recreational Facilities

Recreational facilities will be provided at strategic locations within the foreshore area. Proposed recreational facilities sites have been determined based on the foreshore vegetation condition and rehabilitation sites location to ensure recreational areas do not impact on remnant vegetation.

3.3.6.4 Access and Signage

Controlled access to the foreshore reserve and the shoreline, by local residents and members of the general public is essential to ensure ongoing protection of the existing vegetation, rehabilitated areas and to ensure protection of the stability of the creek bank. The proposed location of the dual use pathway along the foreshore reserve, is indicated in the Management Plan – Wilgie Creek East. The location has been determined on the basis of vegetation condition, walking distance, delineation of different uses of the area for example rehabilitation, recreation and adjacent development and protection of riparian vegetation. Detailed alignment will be finalised in consultation with the Shire of Murray. The proposed location of the dual use pathway is intended to provide access to the foreshore area, whilst discouraging access to rehabilitated areas and riparian vegetation. Appropriate fencing will be installed at strategic areas to protect rehabilitated/sensitive foreshore areas and to encourage foreshore access at certain strategic points along the pathway. Existing fencing will be removed. Unauthorised vehicles, in particular trail bikes, will be restricted from entering the Foreshore Reserve through the use of appropriate fencing or bollards. Signage prohibiting unauthorised vehicle access will be installed at strategic points along the interface between the foreshore reserve and the proposed development.




Educational signage will be displayed at strategic locations along the foreshore reserve of Wilgie Creek. The signs will include information about local flora and fauna and ways in which the public can assist in protecting the local environment. Information about local revegetation/rehabilitation efforts will also be displayed.

3.3.6.5 Weed Control

There have been eleven weed species found in the Wilgie Creek management area and each weed species requires different control and management techniques. The management requirements are detailed in the Management Plan – Wilgie Creek East and will be implemented as part of the rehabilitation works for the area.

3.3.6.6 Fire Management

Fire prevention and protection is required to ensure that public open space and remnant vegetation areas do not pose a fire threat to adjacent development and therefore do not pose a health safety risk. A fire management plan is required prior to the approval of an Outline Development Plan. Therefore prior to the approval of the proposed development, a detailed Fire Management Plan will be prepared to the satisfaction of the Shire of Murray.

3.3.6.7 Water Quality Management

A District Water Management Strategy (DWMS) (RPS, 2010) has been prepared for the proposed Peel Region Scheme amendment area, which includes Wilgie Creek. It has been prepared in accordance with principles contained in “Better Urban Water Management” (WAPC, 2008) has provides detail on measures to protect ground water and treat surface water run-off while maintaining flow volumes to Wilgie Creek. A copy of the DWMS is included as Appendix 4. A Preliminary Site Investigation (PSI) will also be prepared as development is proposed across the amendment area. Any subsequent investigations or remediation will be undertaken in accordance with the Contaminated Sites Act.

3.3.6.8 Algal Blooms

Algae plays an important role in the health and ecology of waterways. Algae is a food source for many aquatic fauna as well a source of oxygen in the water column. However some algae species can be toxic to human health and cause an impact to native aquatic fauna (WRC, 1998). Algal blooms are a common occurrence in waterways in Western Australia where there has been local historical clearing and nutrient application, particularly phosphorous and nitrogen (associated with agricultural practises). Algae is the key cause of the odour associated with Wilgie Creek during the summer months. The strategies outlined in the Management Plan – Wilgie Creek East are focussed on minimising the risk of algal blooms in Wilgie Creek in the short and long-term and hence the associated aesthetic and potential human health impacts.




3.3.6.9 Mosquito Control

Mosquitoes have the potential to cause serious risk to human health as they can act as vectors (transmitters) of a variety of diseases that can impact human health. At subdivision stage a mosquito management plan will be developed, and will including the following: Public education of issues relating to mosquitoes. Chemical control such as adulticides and larvacide. Mosquito monitoring.

3.3.6.10 Animal Control

Domestic pets can threaten native wildlife through predation. Domestic cats are known to predate on small mammals as well as birds. Education and awareness of local residents is important to ensure that pet’s owners are aware of their pet’s potential impact on the surrounding environment. An information package for new residents will be developed to educate about the impacts domestic pets can have on local fauna.

3.3.6.11 Wetland Restoration

The EPA’s position on Resource Enhancement wetlands is:

“The EPA urges that all reasonable measures are taken to minimise the potential impacts on Resource Enhancement wetlands and appropriate buffers. These wetlands have the potential to be restored to Conservation category, and rehabilitation is encouraged.” (EPA, 2008a).

The majority of the Resource Enhancement category sumpland UFI 14376 occurs in the north-west corner of Lot 544 (refer Figure 9). In accordance with EPA Guidance Statement 33, this will be retained and enhanced as part of the rehabilitation works associated with subsequent development of the site. The area of UFI 14376 that stretches west across six landowners, retains a very small area of ‘Good’ quality vegetation with the remainder ‘Degraded’ and ‘Degraded to Completely Degraded’ with areas having been cleared and filled. It is not proposed to retain this area but rather to consolidate wetland restoration works to improve the overall wetland function and values of UFI 14376. As shown in Figure 12, the condition of the core wetland area and associated vegetation of UFI 14376 is currently very poor. With the construction of Pinjarra Road significantly constraining hydrological connection to Black Lake, and constructed drainage channels from the wetland lowering maximum and average winter water levels, returning this system to a pre-disturbance state is not possible, even after removal of stock grazing pressure. To achieve a balance between wetland habitat creation, passive recreational use/appreciation and recognition of the hydrological function of the viable portion of the wetland, it is proposed that the 8.5 ha wetland area will be divided into a number of




zones. The details of the wetland restoration will be provided in a Wetland Management Plan. The preparation and implementation of the Wetland Management Plan will be mandated through Scheme Text Provisions as part of the Town Planning Scheme Amendment 233 currently being assessed by the EPA. The proposed management and restoration of the wetland is described below: Key Conservation Zone

The two Key Conservation Zones will form the primary focus of wetland habitat creation as they are the areas where seasonal standing water accumulates. The ecological attributes that will be retained or enhanced include: (a) Maintenance of roosting sites from dead Melaleucas, additional Melaleuca sp. Will be

planted through the wetlands to provide opportunities for roosting and habitat creation.

(b) Little or no protection currently exists for waterbirds using the wetland during

periods of standing water. A range of endemic native vegetation types will be planted around the edges of the wetlands to provide different habitat types. As water levels vary according to recent rainfall, vegetation will need to be tolerant of periods of inundation and extended periods of little or no surface water.

(c) It is intended to link the two wetland areas to provide a natural flow path and allow

animals to utilise the whole area. (d) The primary purpose of the Key Conservation Zone is to provide habitat for

waterbird use. Therefore access to or through this area will be restricted with a boardwalk provided around the edge to guide passive recreational access.

(e) No drains from the development area will be directed to the wetlands.

Management of drainage to protect water quality is discussed in the District Water Management Strategy (Appendix 4).

Wetland Buffer

As the wetland area is bordered by the busy existing Pinjarra Road on the northern boundary, it is proposed to provide a fringing buffer of taller trees (primarily Eucalyptus rudis) to reduce noise, light spill and disturbance to the wetland. This will complement the existing line of E. rudis on the southern boundary of the wetland. The trees will be used to form the natural edge of the wetland zone. The proposed buffer distance varies from approximately 30 m to over 50 m in an attempt to accommodate existing, mature Eucalypts adjacent to the wetland. A wetland buffer study will be undertaken as part of assessment of the TPS amendment to define a buffer distance necessary to protect existing wetland values. Detailed design of the wetland rehabilitation will be prepared through a Wetland Management Plan to be prepared by the developer of Lot 544 at part of the TPS text provisions.




As the western “arm” of the Resource Enhancement wetland is generally in degraded condition with areas having been filled and/or cleared, the arm occurs across six lots and a number of different owners and would be subject to significant “edge effects” due to the elongated shape, it is proposed that resources are better directed towards the restoration of the 8.5 ha central wetland area as described above rather than an area that is unlikely to be viable in the long-term. It is not proposed to retain and rehabilitate this portion of sumpland. It is proposed that a Wetland Management Plan will be prepared as a TPS text provisions to provide greater detail regarding the above planned works, monitoring, performance criteria, and ongoing management responsibilities.


Implementation of the management commitments described above, as part of future development of the amendment area, will see a significant improvement in wetland and fringing wetland habitat of both Wilgie Creek and the Resource Enhancement sumpland on Lot 544. The strategies for the long-term management and improvement of Wilgie Creek (detailed in Appendix 3) will ensure the potential odour issues will not impact on current or future residents of North Yunderup and will see long-term improvement of the ecological health of the creek. With the commitments described above, this Peel Region Scheme amendment and future development as described will ensure the EPA’s objectives for wetlands can be met.








4.0 MECHANISM FOR ENFORCEMENT OF COMMITMENTS

Through the subsequent development of the North Yunderup area there are a range of commitments provided by the two main land developers that will see a net improvement in the health of Wilgie Creek and the Murray River through removal of current agricultural activities and extensive rehabilitation of sensitive riparian areas. It is proposed that the implementation of the commitments will be captured through the EPA’s formal Environmental Review and provisions of the proposed Town Planning Scheme amendments 216 and 233. The provisions can then be implemented at subdivision stage. It is not seen as appropriate for detailed planning to be undertaken and “locked in” at this early stage and hence precluding future refinement and improvement in outcome. TPS provisions carry the same force in law as PRS provisions with similar audit and enforcement mechanisms to ensure an outcome. The development of the subject area, after approval of the structure planning, proposed Town Planning Scheme amendments and relevant subdivision application will also see an improvement in the quality of water from the amendment area and ultimately entering the Peel–Harvey Estuary by treatment of stormwater flows that currently flow untreated into Wilgie Creek and the Murray River.








5.0 REFERENCES

Department of Environment and Conservation, 2010 Geomorphic Wetlands Swan Coastal Plain dataset mapping, DEC, Perth.

Department of Environment. 2004 Stormwater Management Manual for Western

Australia. Department of Planning, 2010. “Introduction to the Peel Region Scheme”. http://www.

planning.wa.gov.au/The+planning+system/Region+schemes/Peel+Region+Scheme/1504.as

px. Department of Water. 2004–2007. Stormwater Management Manual for Western

Australia, Department of Water, Perth, Western Australia. Department of Water. 2008. Perth Groundwater Atlas. http://www.water.wa.gov.au/idelve/

gwa.

Department of Water. 2010. “Draft Report for Murray Drainage and Water Management Plan and Associated Studies – Floodplain Development Strategy”, DoW, Perth.

Environmental Protection Authority. 1997. Water Quality Improvement Plan for the

Rivers and Estuary of the Peel–Harvey System. Environmental Protection Authority. 2004. EPA Position Statement 4 – Environmental

Protection of Wetlands. Environmental Protection Authority. 2008a. Environmental Guidance for Planning and

Development – Guidance Statement 33, EPA, Perth. Environmental Protection Authority. 2008b. Water Quality Improvement Plan for the

Rivers and Estuary of the Peel – Harvey System – Phosphorus Management, for the Australian Government, Canberra.

Hill, A.L., Semeniuk, C.A., Semeniuk, V. and Del Marco, A. 1996a. Wetlands of the Swan

Coastal Plain 2a. Department of Environmental Protection, Perth. Hill, A.L., Semeniuk, C.A., Semeniuk, V. and Del Marco, A. 1996b. Wetlands of the Swan

Coastal Plain 2b. Department of Environmental Protection, Perth. JDA Consultant Hydrologist. 2007. Lots 300 and 301 Pinjarra Road, North Yunderup –

Wilgie Creek, Review of Floodway Width February 2007. Prepared for Rapley Clough Joint Venture, Perth.


http://www.water.wa.gov.au/idelve/%0Bgwa

http://www.water.wa.gov.au/idelve/%0Bgwa




RPS Bowman Bishaw Gorham. 2006. Lots 300 and 301 Pinjarra Road, Yunderup Hydrogeological Assessment, Preliminary Site Investigation for Contamination and Detailed Site Assessment for Acid Sulfate Soils, for Clough Property and Rapley Wilkinson Consortium, Perth.

RPS. 2007. Environmental Assessment Report Lots 300 and 544 Pinjarra Road,

Yunderup. RPS. 2010. Management Plan – Wilgie Creek East. Prepared for PRDnationwide. Western Australian Planning Commission. 2000. Bush Forever, for the Government of

Western Australia, Perth. Western Australian Planning Commission. 2005. Statement of Planning Policy – Water

Resources. Western Australian Planning Commission. 2008. Better Urban Water Management, for

the Government of Western Australia, Perth.

FIGURES


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Figure 2Proposed PRS Amendment Area

LEGENDSite BoundaryCadastre

Proposed PRS Amendment AreasExcluded from Rural Zone and Included in Urban ZoneExcluded from Rural Zone and Included in Urban Deferred ZoneExcluded from Rural Zone and Included in Regional Open Space Reservation

0 100 200 300 40050metres

°Job Number: L09459Date: 21.04.10Revision: AScale: 1:6000 @ A3Drafted by: SCSource: Cadastre, Orthophoto - Landgate, 2009 PRS Areas - WAPC, 20.08.09

38 Station Street Subiaco | T +61 8 92111111 | F +61 8 92111122 | www.rpsgroup.com.au

WILGIE CREEK

MURRAY RIVER

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Figure 3Peel Region Scheme Zoning


PEEL REGION SCHEMEUrbanUrban DeferredPrivate RecreationRuralPrimary Regional RoadsWaterwaysParks and Recreation

0 100 200 300 40050metres

°Job Number: L09459Date: 21.04.10Revision: AScale: 1:6000 @ A3Drafted by: SCSource: Cadastre, Orthophoto - Landgate, 2009 PRS - DPI, 30.10.2007


WILGIE CREEK

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Figure 7Groundwater Monitoring Bores


!< Groundwater Monitor Bore Location

0 100 200 300 40050metres

°Job Number: L09459Date: 12.07.10Revision: AScale: 1:6000 @ A3Drafted by: SCSource: Cadastre, Orthophoto - Landgate, 2009

290 Churchill Ave Subiaco | T +61 8 93824744 | F +61 8 93821177 | www.rpsgroup.com.au

WILGIE CREEK

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151413

4544

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4140

5148

16

26

1817

29

47

27 3026

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28

52

10

45

312519

0

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21

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160

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10

101

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0

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CULEENUP RD

PINJARRA RD

TOWERA RD

BANKSIA TCE

TONKIN DR

KWIN

ANA F

WY

NORTH YUNDERUP RD

FIEGE

RT R

D

DEERING DR

MURRAY RIVER DR

WALTER RD

CORREAS ST

TATHAM RD

KINGFISHER DR

PHILLIPS WY

ADALUMA WY

RIVER GLEN DR

CABARITA WY

KWIN

ANA F

WY

Figure 81 in 100 Year Floodway and Flood Fringe Mapping


Peel Region Floodway Flood FringeFloodwayFlood fringe

! 1:100 ARI Flood Level (mAHD)

0 100 200 300 40050metres

°Job Number: L09459Date: 12.07.10Revision: AScale: 1:6000 @ A3Drafted by: SCSource: Cadastre, Orthophoto - Landgate, 2009 Floodway mapping - Floodplain Mgt., Jan. 2002


WILGIE CREEK

MURRAY RIVER

UFI - 15702UFI - 15702PalusplainPalusplain

UFI - 14582UFI - 14582Estuary-PeripheralEstuary-Peripheral



UFI - 14622UFI - 14622RiverRiver

UFI - 3848UFI - 3848SumplandSumpland





UFI - 14376UFI - 14376SumplandSumplandUFI - 3847UFI - 3847

Estuary-PeripheralEstuary-Peripheral



UFI - 4539UFI - 4539DamplandDampland

UFI - 3995UFI - 3995RiverRiverUFI - 13292UFI - 13292

Estuary-PeripheralEstuary-Peripheral

UFI - 4432UFI - 4432FloodplainFloodplain

UFI - 4537UFI - 4537LakeLake







UFI - 3995UFI - 3995RiverRiver



CULEENUP RD

TONKIN DR

BANKSIA TCETOW

ERA RD

PINJARRA RD

KWIN

ANA

FWY

FIEGE

RT RD

NORTH YUNDERUP RD

PATEMAN PL DELTA DR

MURRAY RIVER DR

DEERING DR

PERICHO CL

CORREAS ST

WALTER RD

HERON PL

LAKES CR

KINGFISHER DR

TATHAM RD

PHILLIPS WY

BAY RD

RIVER GLEN DR

ADALUMA WY

EGAN PL

JACARANDA DRGREENWOOD W

Y

BLUE

GUM

WY

CABARITA WY

PEPPERMINT CL

ERSKINE RD

BALANADA WY

MACKENZIE CT

KWIN

ANA

FWY

BANKSIA TCE

Figure 9DEC Wetland Mapping


DEC Wetland MappingConservationResource EnhancementMultiple UseNot ApplicableNot Assessed

0 125 250 375 50062.5metres

°Job Number: L09459Date: 12.07.10Revision: AScale: 1:7500 @ A3Drafted by: SCSource: Cadastre, Orthophoto - Landgate, 2009 Geomorphic Wetland Mapping - DEC, 14.06.10


Wilgie

Creek

MURRAY RIVER

ROGERS RD

FIEGE

RT R

D

TONKIN DR

KWIN

ANA

FWY

CULEENUP RD

RONLYN RD

RIVERSIDE DR

WATSO

N DR

DUNKERTO

N RD

DAVIS

RD

NORT

ON AV

PEEL PDEHUSB

AND RD

FURN

ISSDA

LE RD

WANJEE

P ST

BANKSIA TCE

TOWERA RD

GOODOOGA RD

JANNAL

I RD

MURRAY TCE

SMITH ST

PAULL ST

NAIRN RD

PINJARRA RD

DELTA DR

MATTHIE RD

NAME

UNI

DENT

IFIED

BEACHAM STMO

ONDY

NE R

MBL

CAPO

NI R

D

YORK

RD

BIRCHLEY RD

BERTRAM ST

NORTH YUNDERUP RD

TRANQUIL RTT

PERICHO CL

HASTINGS RD

GREE

NWOO

D WY

CULEENUP ST

MURR

AY RI

VER

DR

OLD MANDURAH RD

CASU

LA AV

SERENE PL

JOHN ST

FLIN

DERS C

L

PATEMAN PLTHOMASFIELD PL

LEANDER WY

EGAN PL

WEBSTER WY

WAT

SON

AV

EYRE CL

STEERFORTH DR

LAKE

S RD

DEERING DR

WOODVIEW

WY

JIMJAM CR

TWISS CCT

HERON PL

RICHES PDECORREAS ST

MACQUARIE DR

WALTER RD

HANNANS FAWY

EDDY ST

CORNISH ST

EGRET PL

LAKE

S CR

KINGFISHER DR

PELIC

AN R

D

TUCKEY ST

ALDE

RLEY

PL

BEGA

ST

ARAB

IAN

DR

IRIS CT

ADALUMA WY

COOP

ER ST

SARATOGA CIR

JACARANDA DR

RIVE

RVIEW

ST

RADIATA ST

NINDA ST

PARD

EE EL

B

DOUGLAS PL

CABARITA WY

PEPPERMINT CL

PRIORY WY

KWIN

ANA

FWY

BANKSIA TCE

Figure 10Regional Surface Water Features

LEGENDSite Boundary

0 260 520 780 1,040130metres

°Job Number: L09459Date: 12.07.10Revision: AScale: 1:20000 @ A3Drafted by: SCSource: Cadastre, Aerial photograph - Landgate, 2009.


Wilgie

Creek

MURRAY RIVER

NORTH YUNDERUPNORTH YUNDERUP

SOUTH YUNDERUPSOUTH YUNDERUP

PEEL

INLET

Black

Lake

544

193

0

0

0

331

300

0

1

205

0

17

0

0

185

0

0

91

803

879

303

400

0

2972

14

0

0

2954

302

0

0

0

0

0

0

200

1920

23

2122

0

0

00

0

92

00

125

0

0

130

0

127126

9

128

129

4656

124123

11

0

0

0

0

66

1881

0

1

31 0

0

802

31

0

50

0

32

0

1767

0

4149

10

0

26920

0

1861

219

208

1516

0

1861

2183

0

2

0

1563

0

50

1518

12

00

0

333

51

0

3

2624

21

0

1633

0

0

219

0

215

0

0

1

52

6 18

1

0

0

7

1

1

0

0

145

32

9

209

0

1

1

0

2

216

3 41 5 6 17 8 9

217

98

0

1

0

400

31 32

41

546

100

0

33

3938

84

21

18

7170 83

19

64

90

29

44

46

33

47

43

2524

24

2726

40

6128

23

62

121110

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45

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3534

63

6036

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666564

59

5758

1519 1618 172122 20

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56

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55

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53

53

94

2

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5499

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0 80

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9

2000

0

30

1637

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2181

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200

39

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49

1

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50

30

14

13

14

6263

69

13

2016362 6460615857 5956

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110109107106104 108105

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21

1

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2.5

1.5

2.5

1.5

3

4

3.5

2.5

21.5

1

2

2

11.5

1

2

1.5

2

3

2

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1.5

1.5

2

1.5

3

2

2.5

2.5

1.5

1.5

2

2

1

1

1.5

2

3

1.5

2

1

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2

2

1.5

1

22

2.5

3.5

2

3

1

2

2

21.5

2

3

1

2

2

3

1.5

1.5

2

2

1

1.5

3

2.5

2.5

2.5

1

3

2.5

2.5

2.5

1.5

2

1.5

2.5

2.5

3

1.5

2.5

2

3.5

1.5

2

3.5

2

2

2.5

3

2

1

3

1

2

1

2

1

2

1.5

3

1

2

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2

3.5

2.5

1.5

2

3

2

22

1

3

1.5

2

1

2

2.5

1.5

1.5

2

2

1.5

12

3

2

1.5

2.5

1.5

1.5

2.5

2.5

2

2

3

2

1.5

1.5

2

1.5

2.5

1

3

3

1

1.5

2.5

3

2

1.5

2

2

2

1

2

1

3

2

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3

2.5

2.5

1

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3

1

3

1

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2

3

2

2

2

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1

1

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2.5

1

1

3

2

3

2

1

1.5

2

1.5

1.5

2

1.5

1.5

1.5

2.5

2

1.5

2.5

2

2

3

2

2.5

1.5

2

1

2

3

3

1.5

2

2

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3

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2.5

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2

3

3

2

1.52.5

2.5

3

1.5

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32.5

2

3

3

3

2

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1

3

3

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3

1

1

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2

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32

1.5

2

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2

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2

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2.5

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4

1

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1

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3

1

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1

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1

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2

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2

1

2

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2

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3

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2

1

1

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1

22

1

2

2

1

3

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2.5

1

1

2

3

1

3

2

1

3

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1

1

2

3

2

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1.5

1.5

3

2.5

2

1

1

3

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1

2

2

3

2

2

23

2.5

1.5

33

3

1.5

2

1.5

2.5

3

1

2

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2

2

3

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1

2

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2

1

1

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2

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3

2

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3

2

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2

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3

3

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2CULEENUP RD

PINJARRA RD

BANKSIA TCE

TOWERA RD

TONKIN DR

KWIN

ANA

FWY

WALTER RD

ADALUMA WY

HENTY CL

KWIN

ANA

FWY

Figure 11Topography

LEGENDSite BoundaryCadastreContour (mAHD)

0 100 200 300 40050metres

°Job Number: L09459Date: 12.07.10Revision: AScale: 1:6000 @ A3Drafted by: SCSource: Cadastre, Orthophoto - Landgate, 2009 Contours - Landgate, 31.10.2008


WILGIE CREEK

MURRAY RIVER

D-CD

D

D

G

D

544

193

0

0

0

300

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1

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CULEENUP RD

BANKSIA TCE

TOWERA RD

TONKIN DR

PINJARRA RD

NORTH YUNDERUP RD

FIEGE

RT R

D

DEERING DR

MURRAY RIVER DR

CORREAS ST

WALTER RD

KINGFISHER DR

TATH

AM R

D

PHILLIPS WY

ADALUMA WY

CABARITA WY

Figure 12Vegetation Condition

LEGENDSite BoundaryCadastreVegetation Condition

0 100 200 300 40050metres

°Job Number: L09459Date: 12.07.10Revision: AScale: 1:6000 @ A3Drafted by: SCSource: Cadastre, Orthophoto - Landgate, 2009


WILGIE CREEK

MURRAY RIVER

CULEENUP RD

TONKIN DR

BANKSIA TCETOW

ERA RD

PINJARRA RD

KWIN

ANA

FWY

FIEGE

RT RD

NORTH YUNDERUP RD

PATEMAN PL DELTA DR

MURRAY RIVER DR

DEERING DR

PERICHO CL

CORREAS ST

WALTER RD

HERON PL

LAKES CR

KINGFISHER DR

TATHAM RD

PHILLIPS WY

BAY RD

RIVER GLEN DR

ADALUMA WY

EGAN PL

JACARANDA DRGREENWOOD W

Y

BLUE

GUM

WY

CABARITA WY

PEPPERMINT CL

ERSKINE RD

BALANADA WY

MACKENZIE CT

KWIN

ANA

FWY

BANKSIA TCE

Figure 13ASS Risk Mapping


ASS Risk MappingHigh to moderate riskModerate to low risk

0 125 250 375 50062.5metres

°Job Number: L09459Date: 12.07.10Revision: AScale: 1:7500 @ A3Drafted by: SCSource: Cadastre and Orthophoto - Landgate 2009 ASS Mapping - DEC, 25.01.2010


Wilgie

Creek

MURRAY RIVER

Documents

Environmental Review - Peel Region Scheme Amendment … · Environmental Review Peel Region Scheme Amendment 017/57, North Yunderup SUMMARY The Peel Region Planning Committee of the