EPBC 2011/5912 - Environment

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Meinhardt Infrastructure & Environment Pty Ltd A.C.N. 100 868 979 Level 12, 501 Swanston Street, Melbourne 3000 | Tel: (03) 8676 1200 Fax: (03) 8676 1201

DWARF GALAXIAS CONSERVATION MANAGEMENT PLAN O’GRADY ROAD, HALLAM

Document status/ Document purpose

Final Final Final Final Final

Project Scientist Kathryn Proctor Thomasin Bales Thomasin Bales Thomasin Bales

Thomasin Bales

Reviewer David Garner Todd Reed Todd Reed /John McGuckin

(Streamline Research)

Todd Reed Michael White

Approved by David Garner Adam Creek Adam Creek Adam Creek Michael White

Signature

Date

July 2011 November 2011 December 2011 September 2012

January 2013

Revision

00 01 02 03 04

Copyright © Meinhardt Infrastructure & Environment Pty Ltd 2013 This document is subject to copyright. Use or copying of this document in whole or part without the written permission of Meinhardt Infrastructure & Environment Pty Ltd constitutes an infringement of copyright. Disclaimer Information in this document is current as of January 2013. While all professional care has been undertaken in preparing the document, Meinhardt accepts no liability for loss or damages incurred as a result of reliance placed upon its content. The mention of any company, product or process in this report does not constitute or imply endorsement by Meinhardt.

Meinhardt Infrastructure & Environment Pty Ltd O’Grady Road, Hallam – CMP

Project No. 103516 – Revision 04

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ENDORSEMENT

All relevant parties as listed below endorse this Conservation Management Plan (CMP) and will provide all necessary resources to ensure it is implemented. All staff, contractors, subcontractors and suppliers must comply with its requirements. The project manager is responsible for ensuring the design team addresses relevant requirements within this CMP.

Print Name of Project Manager

Signature of Project Manager

Print name of Contractor

Signature of Contractor

Print Name of Dwarf Galaxias Consultant

Signature of Dwarf Galaxias Consultant

Ivan Heng

John McGuckin



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FOREWORD This Conservation Management Plan (CMP) identifies:

• Pre-construction, construction, post-construction and long-term activities that may impact on the dwarf galaxias environment;

• Management procedures to minimise these impacts; • Environmental management responsibilities; and • Training, monitoring, auditing and reporting requirements.

This CMP is to be used by all project managers, contract superintendents and contractors responsible for the construction of the proposed road and development at O’Grady Road, Hallam. It will also be used by the contractors to inform and develop a Construction Environment Management Plan (CEMP), which will be subject to approval from the responsible authority (City of Casey) and the referral authorities: the Department of Sustainability and Environment (DSE) and the Department of Sustainability, Environment, Water, Population and Communities (SEWPAC). Through adherence to this CMP and the CEMP, site operators will achieve compliance with environmental regulatory requirements and therefore minimise impacts to the environment. Any revisions of this CMP will be referred to the City of Casey and the Department of Sustainability and Environment (DSE) for approval.



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EMERGENCY CONTACTS

Position / Company / Authority Name Phone Mobile

Project Management Contacts

Project Manager

Project Engineer

Project Environmental Management Advisor / Engineer

Contractor Contacts

Contractor

Site Manager

Site Supervisor

Environmental Officer

First Aid Officer

Dwarf Galaxias Consultant Contacts

Streamline Research John McGuckin (03) 9439 7785

Consultant Author Contacts

Meinhardt Infrastructure & Environment

Todd Reed (03) 8676 1200

Emergency Services / Authorities

Fire Brigade / Police / Ambulance 000

City of Casey General Enquires (03) 9705 5200

Melbourne Water General Enquires 131 722

Department of Sustainability and Environment

General Enquires 136 186

Wildlife Victoria (24 hour wildlife rescue)

General Enquires 1300 094 535

EPA General Enquires 1300 372 842

Victorian Poisons Information Centre

General Enquires 131 126



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CONTENTS

1. INTRODUCTION..............................................................................................................1 1.1. PURPOSE 2 1.2. OBJECTIVES 2 1.3. O’GRADY ROAD DEVELOPMENT 2

2. DWARF GALAXIAS ........................................................................................................3 2.1. GENERAL INFORMATION 3 2.2. HABITAT REQUIREMENTS 3 2.3. HABITAT WITHIN THE SITE AREA 3 2.4. HABITAT AND DISTRIBUTION SURROUNDING THE SITE AREA 3

3. POTENTIAL THREATENING PROCESSES AND RESULTING IMPACTS ..................4

4. MANAGEMENT OBJECTIVES FOR DWARF GALAXIAS POPULATION....................6

5. MANAGEMENT PLAN ....................................................................................................7 5.1. IMPLEMENTATION, TIMEFRAME & REVIEW 7 5.2. ROLES & RESPONSIBILITIES 7 5.3. PRE-CONSTRUCTION PHASE 7

5.3.1. Design Considerations 7 5.3.2. Monitoring and Reporting 13

5.4. CONSTRUCTION PHASE 15 5.4.1. Management Procedures 15 5.4.2. Contingency Planning 17 5.4.3. Monitoring and Reporting 17

5.5. POST-CONSTRUCTION PHASE 17 5.5.1. Habitat Management and Maintenance 17 5.5.2. Contingency Planning / Memorandum of Understanding 17 5.5.3. Monitoring and Reporting 17

5.6. LONG-TERM MANAGEMENT AND MAINTENANCE 17

6. SCHEDULES .................................................................................................................17

7. PROTOCOLS.................................................................................................................17 7.1. PROTOCOL FOR SALVAGE AND TRANSLOCATION 17 7.2. PROTOCOL FOR REPORTING 17 7.3. PROTOCOL FOR CONTINGENCY PLANS 17

7.3.1. Protocol for Spill Response 17

8. KEY RESPONSIBILITIES..............................................................................................17

9. CONCLUSION ...............................................................................................................17

10. REFERENCES...............................................................................................................17


Project No. 103516 – Revision 04 ii

List of Tables

Table 3-1 Potential Threatening Processes and Resulting Impacts ........................................................ 4 Table 5-1 Construction Phase Management Procedures ...................................................................... 15 Table 5-2 Post-construction Maintenance.............................................................................................. 17 Table 6-1 Implementation / Mitigation Schedule .................................................................................... 17 Table 6-2 Monitoring and Reporting Schedule....................................................................................... 17 Table 6-3 Post-construction Management Schedule ............................................................................. 17 Table 6-4 Sequencing Schedule ............................................................................................................ 17 List of Appendices

APPENDIX A Figures APPENDIX B Engineering drawings (Bioretention System and Weir Design) APPENDIX C Vegetation and No-Go Zone Plans APPENDIX D EVC / Bioregion Benchmark


Project No. 103516 – Revision 04 1

1. INTRODUCTION Meinhardt Infrastructure and Environment Pty Ltd (Meinhardt) has been commissioned by the City of Casey to prepare a Conservation Management Plan (CMP) for the O’Grady Road, Hallam upgrade development (refer to Appendix A, Figure 1 for site location). The site has been identified to contain significant Swamp Scrub (EVC 53) and Degraded Treeless Vegetation (DTV) flora (see Appendix C for vegetation plan) which provides a habitat for the federally protected dwarf galaxias fish (Galaxiella pusilla). The dwarf galaxias is listed as ‘vulnerable’ under the Environment Protection and Biodiversity Conservation Act (EPBC Act 1999 (Cwlth)) and is listed for protection under the Flora and Fauna Guarantee Act (FFG Act 1998 (Vic)). The site area includes the existing O’Grady Road, the adjacent road reserve and the table drain located north of the existing road (herein referred to as the northern channel). A population of dwarf galaxias is supported in the northern channel and the surrounding habitat. A number of dwarf galaxias site assessments have previously been undertaken in the site area (SKM 2006 and 2008, Biosis Research 2008 and 2009, McGuckin, 2011). Based on these assessments, and on planning and site development constraints, it was determined that the road upgrade should be aligned north of the northern channel to retain the dwarf galaxias habitat. The CMP specifies mitigation and management measures that must be implemented during the pre-construction, construction and post-construction phases to ensure the significant habitat and dwarf galaxias are sufficiently protected. Arrangements for the long-term protection of dwarf galaxias and their habitat are also included. It is important to note that some specifics of management, such as contact details for the project management team and the contractors, the changing locations for mitigation measures throughout the progression of works (eg. sediment and erosion controls and bunding), plus the exact locations of weed control / supplementary planting works (which will be determined by vegetation condition at the scheduled weed control / revegetation times), can’t be determined until the contractors, and their planned sequencing of works, have been determined. Such details will be provided within a Construction Environmental Management Plan (CEMP), to be finalised upon the completion of contracts between the City of Casey and its awarded contractors. This CEMP will be subject to approval from the responsible authority (City of Casey) and the referral authorities: the Department of Sustainability and Environment (DSE) and the Department of Sustainability, Environment, Water, Population and Communities (SEWPAC). Additionally, this CMP does not define the exact strategies to be adopted for every event at which the number of dwarf galaxias is monitored, the stability of the population is assessed, or a localised population is translocated, as the best strategies are best determined when nearing the event itself according to changing environmental and seasonal conditions. For this reason, City of Casey has agreed to directly employ a suitably qualified Dwarf Galaxias Consultant who will ensure that all strategies for monitoring, assessing and translocating dwarf galaxias are at all times suitable for the changing environmental and seasonal conditions. The Dwarf Galaxias Consultant will be managed by City of Casey, who will receive a provisional sum from the contractor to cover the consultant’s expenses during the pre-construction and construction phases, through until the end of the defects liability period in the post-construction phase. The cost of the Dwarf Galaxias Consultant will then be covered by the City of Casey while the CMP remains in effect.



1.1. PURPOSE

A CMP is required by the Department of Sustainability and Environment (DSE) prior to approval of City of Casey Planning Permit Application P98/11. This CMP also addresses requirements under the Federal Government’s Environment Protection and Biodiversity Conservation Act (EPBC Act 1999 (Cwlth)).

1.2. OBJECTIVES

The objectives of this dwarf galaxias CMP are to provide measures to avoid, minimise and mitigate impacts to the dwarf galaxias population through the implementation of management procedures prior to construction, during construction and after construction. The CMP also provides mitigation procedures for habitat restoration and management requirements. The specific objectives of the CMP include:

• Identify site specific threatening processes that could impact on the dwarf galaxias population located on-site;

• Specify appropriate management procedures and assign responsibilities for undertaking the procedures for:

o Pre-construction – habitat protection and enhancement requirements including design considerations, protection of current habitats, details of design, construction and location requirements of compensatory and additional habitat;

o Construction – management procedures for protecting existing habitat from sedimentation, pollution and direct disturbance due to construction activities;

o Post-construction – management requirements such as on-going habitat management (i.e. on-going vegetation and water quality management) and monitoring until ten years after the construction phase has finished; and

o Long-term – establishment of management and monitoring requirements for protection of dwarf galaxias, and extension of suitable habitat in the wider area, after the post-construction phase.

1.3. O’GRADY ROAD DEVELOPMENT

The proposed development comprises road improvement works to O’Grady Road, Hallam (north of the northern channel), which will include:

• Bulk earth works across an area 18 metres wide (the road reserve); • Upgrade of the O’Grady Road (Centre Road) / Hallam South Road intersection; • Grading and compaction of soil and materials to prepare the road surface; • Installation of sewer, water and drainage pipe works, service conduits, street lighting and

Water Sensitive Road Design (WSRD) elements; and • Construction of the road itself.

The City of Casey has identified that the road upgrade is required to improve access and promote development of the industrial properties north of O’Grady Road. Refer to drawings 103516-MIE010s – MIE1700, which detail the design of O’Grady Road and the intersection of O’Grady, Hallam South and Centre Roads.



2. DWARF GALAXIAS

2.1. GENERAL INFORMATION

Dwarf galaxias are a small native fish species (maximum size of 50 mm) which have an exclusively freshwater lifecycle. The species is sexually dimorphic, the males are smaller and more slender than the females, having three longitudinal black stripes along each side of the trunk, and a distinct red strip between the mid and lower back strip. The black stripes are less distinct or absent in females (McGuckin, 2011). The dwarf galaxias is a short lived species, with minimal numbers surviving through to a second year. The spawning period is mainly between winter and spring, but can extend throughout summer when conditions are favourable (McGuckin, 2011).

2.2. HABITAT REQUIREMENTS

Dwarf galaxias occur in waters that contain a variety of aquatic vegetation, typically preferring swampy floodplain environments, but can also be found in creeks and rivers. Dwarf galaxias occur in two types of habitats, primary habitats which have permanent water, and secondary habitats which have intermittent or ephemeral water regimes. Primary habitats are responsible for the long term survival of the species (McGuckin, 2011).

2.3. HABITAT WITHIN THE SITE AREA

Although the northern drainage channel adjacent to O’Grady Road is considered to be a secondary habitat for the dwarf galaxias due to the reaches along it that dry out, some reaches maintain permanent water and these provide refuge for the dwarf galaxias in dry periods, contributing to the long term persistence of the species. The channel is therefore in essence a primary habitat. In wet periods, the species can re-colonise in areas that have dried out (McGuckin, 2011). The Swamp Scrub which aligns the northern drainage channel provides shade and a cool environment suitable for dwarf galaxias colonisation. See Appendix C for vegetation plans detailing the vegetation aligning the northern table drain.

2.4. HABITAT AND DISTRIBUTION SURROUNDING THE SITE AREA

In the Hallam area, dwarf galaxias are expected to have occurred in nearby Troups Creek West Branch and floodplain wetlands. Draining and other physical modifications to habitat and changes to flow regimes associated with urban development are considered to be major factors contributing to the loss of dwarf galaxias populations (McGuckin, 2011). Recently dwarf galaxias habitat in the Hallam area has been constricted to a few channels along O’Grady Road, Centre Road and Golf Links Road. It is likely that the dwarf galaxias population has increased over the past six months, with the increased rainfall the area has received, providing the opportunity for linkage of previously dry habitats.



3. POTENTIAL THREATENING PROCESSES AND RESULTING IMPACTS

This section identifies the potential threatening processes and resulting impacts to dwarf galaxias associated with the pre-construction, construction, post-construction and long-term phases of the project.

Table 3-1 Potential Threatening Processes and Resulting Impacts

Potential Threatening Processes Impact Mitigation Measures

Pre-construction

Design considerations

Replacement of section of table drain with underground drainage pipe

Removal of dwarf galaxias habitat will result in population decline

See Section 5.3.1 (“Minimising Adverse Impacts”) and Table 6.1 (row 13)

Removal of significant vegetation (i.e. Swamp Scrub)

Removal of vegetation will reduce shade suitable for dwarf galaxias and increase water temperature, increasing the risk of pest (Gambusia Holbrooki) incursion

See Section 5.3.1 (“Minimising Adverse Impacts” and “Improving Habitat”) and Table 6.1 (rows 9 – 12)

Alteration of drainage systems

Changes in water flow can effect dwarf galaxias migration – i.e. removal of drains can prevent migration

See Section 5.3.1 (“Minimising Adverse Impacts” and “Improving Habitat”) and Table 6.1 (row 13)

Construction

Construction activities

Increased runoff of water and sediment due to excavation and stockpiling of topsoil

Reduction in water quality impacting the dwarf galaxias

See Table 5.1 (row 2) and Table 6.1 (rows 3 – 6)

Disturbance of dwarf galaxias due to construction activities such as: o Break up of existing

structures and road pavement;

o Placement of sub-grade and road materials; and

o Bitumen and asphalt laying and surfacing.

Disturbance of dwarf galaxias, particularly if during spawning periods

See Table 5.1 (row 1) and Table 6.1 (row 2)

Spillage of on-site chemicals

Contamination of northern channel surface waters and surrounding soils, negatively impacting dwarf galaxias populations




Inadvertent draining of channel or interruption of water supply lines

Drying out of northern channel, negatively impacting dwarf galaxias populations


Post-construction

Change in land use

Increase in population use of site area resulting in increased likelihood of littering, illegal dumping, roadway accidents and chemical spills

Deterioration of water quality negatively impacting dwarf galaxias populations

See Section 5.5.2 and Table 6.3 (row 4)

Lack of maintenance of significant flora resulting in an increase in weeds

Swamp Scrub provides a suitable habitat for dwarf galaxias populations, degradation will negatively impact the species

See Table 5.2 (rows 4 – 5) and Table 6.3 (rows 1 – 4)

Long-term

CMP no longer in effect

Lapse of sense of responsibility for management and maintenance works

Long-term degradation of dwarf galaxias habitat See Section 5.6



4. MANAGEMENT OBJECTIVES FOR DWARF GALAXIAS POPULATION

The objectives of this CMP are to provide measures to avoid, minimise and mitigate impacts to the dwarf galaxias population, as detailed in Section 3 of the Dwarf Galaxias (Galaxiella pusilla) Environmental Management Plan – O’Grady Road, Hallam (McGuckin 2011), and developed in Section 5 of this report. These objectives will allow for achievement of the ultimate objective of this CMP, being the long-term viability of the dwarf galaxias population within the wider O’Grady Road drainage channel system, as altered by O’Grady Road upgrade works. Specifically, success will be determined periodically (after each monitoring event, as described in Sections 5.4.3 and 5.5.3 of this report) by the Dwarf Galaxias Consultant (see Table 6.2, rows 3 – 4)with reference to Ecological Indicators (EIs), which are defined in terms of the following ecological objectives:

• Prevention of a decline in the northern channel’s dwarf galaxias population; • Provision of suitable riparian and in-stream vegetative habitat; and • An overall improvement to existing water quality.

Specific EI targets are detailed within Section 5.4.3 of this CMP.



5. MANAGEMENT PLAN

5.1. IMPLEMENTATION, TIMEFRAME & REVIEW

As the project proponents, the City of Casey will at all times be ultimately responsible for the implementation of the CMP. Initially, City of Casey will ensure that the CMP is being properly implemented by the project contractors, who will maintain responsibility for its execution through the pre-construction phase, the construction phase, and the defects liability period of the post-construction phase. Responsibility for the actual execution of the CMP will then be handed over to the City of Casey for the rest of the time that it remains in effect. The CMP will take effect from the date of its approval by the responsible authority (City of Casey), and will remain in effect until ten years into the post-construction phase. After this period, the City of Casey will retain responsibility for the maintenance of the land habitat supporting the dwarf galaxias population, while Melbourne Water will retain responsibility for the drainage channels. Throughout the duration of the CMP being in effect, it will be revised and updated on an annual basis, and additionally whenever impacts associated with the O’Grady Road development have required the implementation of the protocol for contingency plans (see Section 7.3). Additional management actions may also be included as a result of unforeseen additional works.

5.2. ROLES & RESPONSIBILITIES

As already stated, this CMP will be executed by the project contractors through the pre-construction phase, the construction phase, and the defects liability period of the post-construction phase, and then by the City of Casey for the rest of the time that it remains in effect. While it is important to note that ultimate responsibility for the implementation of the CMP lies at all times with the City of Casey, individual responsibility for specific actions detailed within this CMP generally apply as follows:

• The Project Manager (PM) is responsible for design and construction program issues; • The Contractor’s Site Manager (SM) is responsible for construction site management issues; • The Contractor’s Site Supervisor (SS) is responsible for monitoring activities and ensuring that

the Contractor fulfills environmental management responsibilities; and • The Dwarf Galaxias Consultant (DGC) is responsible for ensuring that all strategies for

monitoring, assessing and translocating dwarf galaxias are sufficient to secure their protection. The DGC must be given the authority to instigate appropriate controls and mitigation measures whenever a threat or adverse impacts to dwarf galaxias or their habitat is noted (see Sections 5.4.2, 5.5.2 and 7.3) and whenever Ecological Indicator (EI) targets are not met (see Sections 5.4.3 and 5.5.3).

Specific responsibility for each management action is as noted under the “Responsible agent / funding source” column provided in Tables 6.1, 6.2 and 6.3.

5.3. PRE-CONSTRUCTION PHASE

5.3.1. Design Considerations



A host of design considerations have been utilized to avoid and minimize negative impacts to significant vegetation and to the dwarf galaxias population, and to additionally improve habitat availability for the dwarf galaxias. Avoiding Adverse Impacts As much as it is practicable, adverse impacts to significant vegetation and to the dwarf galaxias population have been avoided by relocating the upgraded O’Grady Road to a corridor that predominantly runs north of the current road reserve, its channels and vegetation. Road upgrade works thereby avoid affecting the majority of the northern channel and its fringing vegetation. Minimizing Adverse Impacts Locating the upgraded O’Grady Road predominantly to the north of the current road reserve has allowed for a minimization of remnant vegetation that requires removal. Much that will be removed lies within the bunded buffer zone that is designated between the southern edge of the upgraded road and the northern edge of the remnant vegetation to be retained. In order to minimize the remnant vegetation to be removed for the buffer zone, the width of the zone has been minimized as much as possible while maintaining safety requirements that the bunding have a maximum 1 in 2 slope. The resultant remnant vegetation loss across the whole project amounts to 0.13 habitat hectares from an area of 0.66 hectares (Meinhardt, 2011a). Vegetation plans that show the location of remnant vegetation to be kept and that which will be lost are contained in Appendix C. The VicRoads requirement to align the upgraded O’Grady Road with the existing O’Grady Road / Hallam South Road / Centre Road intersection, however, means that there is a small stretch of upgraded road at the east end of the project that does cross into the current road reserve. This design requirement will result in the removal of 60 metres of the northern channel. The resulting potential negative impacts on dwarf galaxias have been minimized by:

• Replacing the channel with a pipe under the road which will enable a continued migration of dwarf galaxias during high flow events; and

• Aligning this section of works predominantly through degraded treeless vegetation (DTV), of a lesser habitat quality for dwarf galaxias than the Swamp Scrub EVC remnants along other sections of the northern channel.

Adverse impacts that might be expected after the completion of the project relate to water quality issues associated with increased usage of the industrial land to the north of the upgraded road, increased runoff from hard surfaces, and increased usage of the upgraded O’Grady Road itself. Design considerations to minimize any such negative effects include:

• Water sensitive roadside design (WSRD) elements to minimize gross pollutant, sediment and chemical pollutant input to the northern channel. Bioretention systems will be installed at nine points along the southern edge of the upgraded O’Grady Road, in order to discharge appropriately treated water to the northern channel. Design details for the bioretention systems are shown in Drawing 103516-MIE201, included in Appendix B;

• Preventing access to the current road reserve, its channels and vegetation, to minimize dumping of rubbish. Access will be prevented by utilizing fencing (a w-beam guard fence and a cyclone fence) along the southern side of the upgraded road, and lockable gates at the three access locations to the current road reserve, which must be retained to allow for Melbourne Water and SP Ausnet maintenance. The exact location of the three access points will be determined in the contractor’s CEMP, but they must each be located at one of the pre-



existing northern channel crossings so that no vegetation clearing will be required by their presence;

• Revegetation / regeneration of Swamp Scrub vegetation across the width of the project (see “Improving habitat” section below for further details) to catch sediment and soak up increased water flows, thus preventing sedimentation of the aquatic habitats; and

• The best practice water quality management design details that will be required by City of Casey planning permit conditions for any future industrial developments.

Improving Habitat The design incorporates both aquatic and terrestrial features that will improve habitat for dwarf galaxias. Given that the current O’Grady Road will become a service maintenance access road only, it will no longer be required to provide unbroken access from Hallam South Road to its termination just east of the South Gippsland Highway. The current road has thus been broken into three sections by the new design, allowing for the incorporation of two open weirs that join the northern and southern channels. These two weirs will provide much greater habitat connectivity than currently exists, given that the drains that currently link the channels are blocked. The new design will thus allow water flow, and therefore also dwarf galaxias migration from the northern channel to the southern channel, in a way not currently possible. This will be advantageous given that, while dwarf galaxias are known to occasionally exist in the southern channel during wet periods, the population is reported to decline in dry periods. By allowing increased connectivity between the northern and southern channels, the dwarf galaxias population should be able to increase and stabilize in the southern channel. It is noted that the two weirs extend across the current road reserve, and that their construction will therefore involve cutting into ground currently covered by unsealed road or slashed roadside verge. There will therefore be no associated negative impact to remnant vegetation. Potential negative impacts to aquatic habitat will be managed in accordance with the procedures detailed in Table 6.1, row 2. The weirs are open air and have been designed so that their deepest point is higher than the general water level within the northern channel, meaning that they flow only with significant water input to the northern channel. This is turn means that there will be no shallow stagnant water within the weirs, which would be advantageous for the pest fish species Gambusia Holbrooki. The weirs will require revegetation with local providence indigenous species appropriate to the site’s Swamp Scrub EVC, particularly aquatic species, with the exact species mix to be determined in the contractor’s CEMP (subject to approval from the City of Casey, DSE and SEWPAC). The species mix will additionally incorporate the following plant association, which has been noted to create favourable habitat for dwarf galaxias (pers. comm. John McGuckin): Water Ribbons (Triglochin procerum); Spike-sedge (Eleocharis spp.); Floating Pondweed (Potamogeton tricarinatus); Finger Rush (Juncus subsecundus); and Slender Knotweed (Persicaria decipens). Land immediately adjacent to both sides of the two weirs will also be revegetated with Swamp Scrub vegetation with a dominance of Melaleuca ericifolia(see below) in order to provide the shady environment currently favoured by dwarf galaxias along the northern channel. Figure 1, included at the end of this section, shows a typical cross-section of the weirs. The reduction in the current O’Grady Road’s function, from an open public road to a locked service maintenance access road only, provides further opportunity to improve habitat. There will be a much reduced need to keep the road verges clear of vegetation, so the regime of slashing that has so far



been allowed on both sides of the road will therefore be reduced. This will facilitate regeneration of Swamp Scrub vegetation on these sections of land via natural recruitment from adjacent vegetation, as the adjacent Melaleuca ericifoliais a colony-forming clonal species which readily spreads via shoots from surface roots to establish the typical dome structure characteristic of remnants. Natural recruitment has been selected as the primary means of improving habitat in these sections of land which are not directly utilized by dwarf galaxias, as it is a practical measure that: takes advantage of naturally occurring processes; minimizes the requirement for site works; and reduces costs associated with the project. However, in the event that natural recruitment is not progressing successfully, regeneration will be facilitated with weed control works and revegetation with indigenous species appropriate to Swamp Scrub EVC (see Appendix D for some typical species). Whether facilitation by weed control and/or revegetation is required or not will be determined every spring, for ten years following the completion of construction works, by City of Casey working with a suitably qualified ecologist (see Table 6.3, row 3 for details). The resultant increase in the cover of Swamp Scrub vegetation between the channels will help protect the remnant vegetation along the channels from the edge effects that such small patches of vegetation may suffer from. Protection of the remnant Swamp Scrub vegetation is highly advantageous given that the vegetation is what is currently providing the cool shaded environment that is so suitable for dwarf galaxias colonisation. The remnant Swamp Scrub will thus also be enhanced by revegetation and weed control works that will take place immediately to either side of the northern and southern channels, immediately to either side of the two weirs, and on the bunded buffer zone between the northern channel and the upgraded O’Grady Road. Revegetation will be with indigenous species appropriate to Swamp Scrub EVC with a dominance of Melaleuca ericifolia, with the exact species mix to be determined in the contractor’s CEMP (which will be subject to approval from the City of Casey, DSE and SEWPAC). Whether ongoing weed control and/or revegetation works are required or not will be determined every spring, for ten years following the completion of construction works, by City of Casey working with a suitably qualified ecologist (see Table 6.3, row 2 for details). Figure 2, included at the end of this section, shows a typical cross-section across the project’s width, from the upgraded O’Grady Road in the north through to the southern channel. The section shows various habitat improvement zones, including the revegetated bunded buffer zone, the enhanced remnant vegetation immediately adjacent to the northern and the southern channels, and the naturally regenerating vegetation between the two channels. Figure 3shows a similar cross-section that also incorporates the weirs.



Figure 1. Vegetation rehabilitation along weir cross-section (nb. form of vegetation is indicative only)

Figure 2. Vegetation rehabilitation along cross-section of project’s width (nb. form of vegetation is indicative only)



Figure 3. Vegetation rehabilitation along cross-section of project’s width, incorporating weirs (nb. form of vegetation is indicative only)



5.3.2. Monitoring and Reporting

Prior to the removal of any significant vegetation, or to any earthworks that breach the northern channel, pre-construction surveys will be undertaken by the Dwarf Galaxias Consultant, using methods appropriate to the season in which the monitoring is being undertaken, and appropriate to the condition of the channel section being affected by the construction works. The consultant will ensure that sufficient baseline data regarding dwarf galaxias numbers, habitat quality and water quality(as defined two paragraphs below) is collected from five specific locations (see Figures 4 and 5):

• Wetland – located on the southwestern corner of the O’Grady Road / Hallam South Road intersection;

• Reach 1 – towards the eastern end of the northern channel, in a section relatively undisturbed by the 60m of piping works near Hallam South Road;

• Reach 2 – downstream from the easternmost channel that drains into the northern channel from the north;

• Reach 3 – downstream from the westernmost channel that drains into the northern channel from the north; and

• Control site – located in a protected area of the same drainage system (which is also being used as a control site for Golf Links Road works), adjacent to Centre Road approximately 3km upstream of site.

Figure 4. On-site survey locations

Each location will consist of a nominated reach of 200 metres. Reaches will be marked by flagging tape in the vegetation and, if required, by additional establishment of permanent markers (star pickets or wooden posts).



Figure 5. Control site location

Baseline data to be collected during the pre-construction surveys includes:

• Dwarf galaxias population structure, through categorization of individuals (as captured during a one hour period of dip net sampling at each location) into young / intermediate / adult fish brackets (population structure will change with the different times of the year);

• Riparian and in-stream vegetative habitat quality, as evaluated by the Dwarf Galaxias Consultant and as recorded photographically at set photographic points to be established at each of the reaches during the pre-construction surveys; and

• In-situ water quality, as indicated by monitoring parameter readings collected at the eastern end of each of the nominated reaches (parameters will include turbidity, pH, temperature, dissolved oxygen (DO), electrical conductivity (EC), total phosphorous (TP), total nitrogen (TN), arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), lead (Pb), nickel (Ni) and zinc (Zn)).

Benchmarks to be included into the Works Schedule (which have previously been acceptable as part of a referral for dwarf galaxias at Golf Links Road, Hallam) include:

• Dwarf galaxias presence / absence (assessed against presence / absence at control site and approximate numbers);

• Evidence of breeding activity (assessed in comparison with control site); • Visual assessment of in-stream rubbish;



• Visual assessment of shading and in-stream vegetation (to occupy 50% and 25% respectively); and

• Visual assessment through photographic points. The Dwarf Galaxias Consultant will then prepare a survey report that must be provided to DSE for review prior to construction commencing. It must be noted that earthworks breaching the northern channel must not take place during the breeding season (1stApril to 30thNovember); such works must be limited to the period between 1stDecember and 31stMarch. In the event that dwarf galaxias are identified in a section of the northern channel where earthworks will occur above the water level (eg. for WSRD input to the channel, plus weir construction), the Dwarf Galaxias Consultant will determine whether salvage and translocation is warranted by the possibility of an inflow of detrimental water quality. If dwarf galaxias are identified in a section of the northern channel where earthworks will occur below the channel’s water level (eg. infilling the eastern end of the channel, plus box-culvert construction), salvage and translocation must be undertaken, and in accordance with the protocol at Section 7.1 of this report. While pre-construction surveys will initially set baseline data, it is to be noted that, in the event of a flood during the construction or post-construction phases, the baseline data for the selected survey locations will need to be reset. All five of the nominated survey reaches will need to be resurveyed after flood waters recede. In the event that the flood occurs during the construction phase, the Dwarf Galaxias Consultant must be given appropriate authority to instruct that on-site works do not recommence until he has finalized his survey work.

5.4. CONSTRUCTION PHASE

5.4.1. Management Procedures

The following management procedures will be incorporated into the construction phase of the development (these procedures are also specified in the Project Environment Management Plan (PEMP) (Meinhardt, 2011b).

Table 5-1 Construction Phase Management Procedures

Item Management Procedure

Disturbance to the dwarf galaxias during breeding season (1stApril to 30thNovember) must be avoided, so any works that breach the walls of the northern channel must be limited to the period between 1stDecember and 31stMarch. Works that do breach the walls of the northern channel must be undertaken in such a way as to prevent sediment runoff into the channel through the use of adequate sediment / erosion control techniques and the immediate stabilisation of newly worked earth utilising geotextiles.

Dwarf galaxias disturbance

No-go zones will be established at the site using high visibility parafence or equivalent prior to the commencement of construction in consultation with the Dwarf Galaxias Consultant (refer to Appendix C for diagrams displaying no-go zones). These no-go zone fences are to be maintained by the site supervisor and are to remain in place until construction has been completed. Contractors will not enter the no-go zones: any required works are to be conducted




by City of Casey in consultation with the Dwarf Galaxias Consultant.

Whenever significant vegetation is to be removed, or a section of the northern channel is to be breached by earthworks, pre-construction surveys will be undertaken by the Dwarf Galaxias Consultant (see Section 5.3.2 above). In the event that dwarf galaxias are identified in the section to be affected by earthworks, salvage and translocation will be undertaken as per the protocol (see Section 7.1) whenever those earthworks are to occur below the channel’s water level, and if deemed preferable by the Dwarf Galaxias Consultant whenever those earthworks are to occur above the channel’s water level.

Sediment and erosion controls will be implemented during construction in accordance with Victorian Environment Protection Agency (EPA) guidelines including:

• Environmental guidelines for major construction sites (1996); and • Construction techniques for sediment pollution control (1991).

Control measures will include using stabilized diversion drains to divert runoff away from exposed areas of soil, and using hay bales and filter cloth sediment traps to retard water flow and entrain sediment. The effectiveness of these measures is to be monitored and maintained by the site supervisor, and they are to remain in place within the locality of any earthworks from before the earthworks have begun until they have been successfully stabilised, plus along the southern length of the construction zone until construction has ceased and all earthworks have been successfully stabilised.

Stockpiles will be located away from drainage lines and covered with tarpaulins. The site supervisor will monitor stockpiles to ensure that no sediment is eroding from them, and take steps to move any that are found to be eroding from below, or to more effectively cover any that are found to be eroding from above.

The site supervisor will conduct regular weekly site inspections to ensure that sedimentation and erosion control structures are positioned correctly and are working effectively.

The site supervisor will also conduct site inspections for correct positioning and effectiveness of sedimentation and erosion control structures during or as soon as practicable after a high rainfall (>25mm in a day) event. In the event of localized flooding or tracking of mud through the site by construction vehicles, any works leading to the disturbance or spread of mud must cease.

Water quality: sediment and erosion

All areas exposed by construction activity must progressively (as each area of earthworks is completed) be covered with topsoil and then stabilized with sterilized grasses (note that fertilizers must not be used ). Additionally, once grasses are properly established, the bunded buffer zone that is designated between the southern edge of the upgraded road and the northern edge of the remnant vegetation to be retained will then be revegetated with local providence indigenous species appropriate to the site’s Swamp Scrub EVC, particularly Melaleuca ericifolia, at frequencies conducive to establishing benchmark canopy structures in the long term (see Appendix D for some typical species, and note that the exact species mix and planting frequency will be determined in the contractor’s CEMP).

Water quality: chemical spill

Chemicals must be stored in a safe and secure impermeable bunded area, or on a bunded pallet, located as far away from the northern channel as site conditions will allow, as well as away from more localised drainage lines. Appropriate bunding will be established prior to any chemicals being brought to site, and will remain until all chemicals have been removed from site. A spill kit will be kept on-site at all times, and all site workers will be made familiar with its location and usage.

Water quality: stormwater discharge

The quality of stormwater discharge shall be managed to be as close as practicable to background levels and comply with the SEPP (Waters of Victoria).




Water quantity An emergency water supply will be located on-site during construction works to enable water levels within the northern channel to be replenished in the event that the channel is inadvertently drained or its water supply is inadvertently interrupted.

Indigenous vegetation disturbance

No native vegetation (other than that earmarked for removal) shall be removed. The temporary high visibility parafence (or equivalent) that will have been established prior to the commencement of construction will clearly establish a no-go zone, from which vegetation must not be removed. This barrier is to be maintained by the site supervisor and is to remain in place until the cyclone fence north of the revegetated bunded buffer zone has been erected.

Revegetation of Swamp Scrub EVC and weed control works will be undertaken: • Immediately to either side of the northern and southern channels; • Immediately to either side of the two weirs; and • On the bunded buffer zone between the northern channel and the upgraded O’Grady

Road. Revegetation will be with local providence indigenous species appropriate to the site’s Swamp Scrub EVC, with a dominance ofMelaleuca ericifolia,at frequencies conducive to establishing benchmark canopy structures in the long term (see Appendix D for some typical species, and note that the exact species mix and planting frequency will be determined in the contractor’s CEMP, which will be subject to approval from the City of Casey, DSE and SEWPAC). What weed control works are required will be assessed by a suitably qualified weed contractor each spring.

Regeneration of Swamp Scrub EVC will be encouraged on the reclaimed width of the current O’Grady Road and along the verges that had previously been subjected to slashing. This will occur via the natural recruitment from adjacent vegetation that is expected following the cessation of slashing, to be facilitated if required by weed control works and revegetation with local providence indigenous species appropriate to the site’s Swamp Scrub EVC (see Appendix D for some typical species), particularly Melaleuca ericifolia. The degree of supplementary planting will be determined in the contractor’s CEMP, which will be subject to approval from the City of Casey, DSE and SEWPAC. What weed control works are required will be assessed by a suitably qualified weed contractor each spring.

Pest (Gambusia holbrooki) minimization: habitat improvement

Revegetation of open air weirs with local providence indigenous species appropriate to the site’s Swamp Scrub EVC, particularly aquatic species, with the exact species mix and planting frequency to be determined in the contractor’s CEMP (subject to approval from the City of Casey, DSE and SEWPAC).The species mix will additionally incorporatethe following plant association, which has been noted to create favourable habitat for dwarf galaxias (pers. comm. John McGuckin): Water Ribbons (Triglochin procerum); Spike-sedge (Eleocharis spp.); Floating Pondweed (Potamogeton tricarinatus); Finger Rush (Juncus subsecundus); and Slender Knotweed (Persicaria decipens).

5.4.2. Contingency Planning

In the event that any threat or adverse impacts to dwarf galaxias or their habitat is noted, emergency response procedures must be instituted immediately, following the contingency planning protocol (see Section 7.3). Such threats or adverse impacts would include, but are not limited to:

• Removal or degradation of supporting fringe Swamp Scrub vegetation; • Altered hydrology such as choking of waterways by weeds; • Reduced water flow resulting from extended dry periods; • Drying due to inadvertent draining of the channel or interruption of its water supply lines; • Reduction in water quality through excessive sedimentation, or chemical pollution as a result

of illegal dumping, roadway accident or industrial incident; and



• A rise in pest species such as Gambusia holbrooki, which might arise from any of the factors listed above.


Weekly surveys at the five locations specified in Section 5.3.2 will be undertaken by the Dwarf Galaxias Consultant during the construction period, every Friday at 10am. Additional surveys will also be undertaken after each high rainfall event (rainfall>25mm in a day), during any enactment of the contingency planning protocol (see protocol in Section 7.3), after any spills (see protocol in Section 7.3.1), and additionally to reset baseline data after any flood waters recede (see last paragraph in Section 5.3.2). The consultant will ensure that methods used are appropriate to the season in which the monitoring is being undertaken, and appropriate to the condition of the channel section being monitored. Survey data that will be collected include all those attributes / parameters collected during the pre-construction surveys (dwarf galaxias population structure, riparian and in-stream vegetative habitat quality, and in-situ water quality, the specifics of each being as already detailed in Section 5.3.2). Ecological Indicators (EIs) are defined in terms of the following ecological objectives:

• Prevention of a decline in population; • Provision of suitable riparian and in-stream vegetative habitat; and • An overall improvement to existing water quality.

EI targets are as follows:

• Dwarf galaxias numbers are not to drop below 50% of the numbers originally counted during pre-construction surveys at any of the four O’Grady Road locations. If numbers do drop below 50%, the same comparison is to be made for numbers at the Centre Road control site. If the Centre Road control site shows a similar trend, then the local population decline would be considered likely to be reflecting a wider population trend, and the Dwarf Galaxias Consultant will be required to consider whether recommendations for the protection of the species within the wider area can be made. If the Centre Road control site doesn’t show a similar trend, then it may be that the local population decline is reflecting the more localized effects of road construction, and the contingency planning protocol must be enacted (as detailed below in the last paragraph of this section);

• The quality of riparian and in-stream vegetative habitat, as evaluated by the Dwarf Galaxias Consultant, is to be improved over time or, at the very least, to be maintained. If the Dwarf Galaxias Consultant considers that the quality of vegetative habitat is declining over time, and that such a decline is not a transitory result of recent climatic conditions, then the contingency planning protocol must be enacted (as detailed below in the last paragraph of this section); and

• Water quality parameters are to show an overall improvement to water quality over time. The Dwarf Galaxias Consultant has specified that more exact Ecological Indicator (EI) targets aren’t readily adopted from the state and federal trigger values that are usually utilized, as dwarf galaxias tolerate and often prefer highly disturbed waterways. This means that the water quality parameter values that the dwarf galaxias comfortably tolerate lie outside trigger values to begin with, and so the trigger values can’t properly be used as actual triggers. Based on the Dwarf Galaxias Consultant’s extensive experience of sampling waters within which dwarf galaxias survive (both locally (Boggy Creek, Cardinia Creek, and numerous unnamed roadside channels around Hallam and Langwarrin) and state-wide (from Traralgon in the east to Bridgewater Lakes in the west), pers. comm. John McGuckin), water quality parameter results measured in the field (turbidy, pH, temperature, DO and EC) will be



assessed against the acceptable parameter ranges specified below, while laboratory analytes (TP, TN, As, Cd, Cr, Cu, Pb, Ni and Zn) will be assessed against the trigger values for freshwater as listed in ANZECC (2000):

o turbidity <100 NTU o pH 6.5 – 9.0 o temperature 5 – 30 °C o dissolved oxygen 5.0 – 15 mg/L o electrical conductivity <2000 µS/cm o total phosphorous 50 µgP/L o total nitrogen 500 µgN/L o arsenic 13 µg/L o cadmium 0.2 µg/L o chromium 1.0 µg/L o copper 1.4 µg/L o lead 3.4 µg/L o nickel 11 µg/L o zinc 8.0 µg/L

On a quarterly basis during the construction period, the Dwarf Galaxias Consultant will prepare a survey report that includes assessment of the results against EI targets, which will be provided to DSE for review. Additionally, if unforeseen events such as pollution spills or unexpected losses of dwarf galaxias occur within the construction period, the Dwarf Galaxias Consultant will report these events to SEWPAC’s Monitoring and Audit Section. In the event that EI targets are not met, an emergency meeting will be called between the consultant, the contractors, the City of Casey and DSE, to address the issue and determine required actions (eg. utilizing the on-site emergency fresh water supply to supplement the northern channel’s water level), following the contingency planning protocol (see Section 7.3).In the interim, the consultant must be given appropriate authority to instigate the appropriate controls / mitigation measures that he deems necessary, such as issuing a stop work order, or instituting sediment / pollution controls such as in-stream bunding.

5.5. POST-CONSTRUCTION PHASE

5.5.1. Habitat Management and Maintenance

Many pre-construction design elements that have been incorporated into the project will in themselves maintain or improve habitat for dwarf galaxias on an ongoing basis, as already detailed in Section 5.3. However, in order to remain effective, the following elements will require maintenance following the completion of construction:

• WSRD elements along the upgraded O’Grady Road; • Fences and locked gates that prevent access to the current road reserve, its channels and

vegetation; • Remnant / revegetated Swamp Scrub along the bunded buffer zone, the northern and

southern channels, and the two weirs; • Regenerating Swamp Scrub along both sides of the current O’Grady Road; and • The aquatic environment within the northern and southern channels and the two weirs.

Maintenance of these elements will be in accordance with the table below.



Table 5-2 Post-construction Maintenance

Item Maintenance Procedure

WSRD WSRD structures will be regularly maintained by City of Casey, with litter, sediment and excessive organic materials to be removed and disposed of off-site.

Cyclone fences

The condition of fences that block access to no-go vegetation zones will be regularly examined as part of vegetation assessment works (see “Remnant and revegetated Swamp Scrub” row below).

Locked gates Responsibility for the ongoing locking of access points to the current O’Grady Road reserve, its channels and vegetation, will be in the hands of Melbourne Water and SP Ausnet, for whom the access road is being retained.

Remnant and revegetated Swamp Scrub

Every spring, for ten years following the completion of construction works, a suitably qualified ecologist working with Casey City Council will determine whether weed control, revegetation works or fence maintenance is required (for more details refer to Table 6.3, row 2). Revegetating Swamp Scrub will continue to minimize the risk of pest (Gambusia holbrooki) incursion.

Regenerating Swamp Scrub

Every spring, for ten years following the completion of construction works, a suitably qualified ecologist working with Casey City Council will determine whether weed control or revegetation works are required (for more details refer to Table 6.3, row 3). As above, regenerating Swamp Scrub will facilitate minimization of the risk of pest (Gambusia holbrooki) incursion.

Channels and weirs

Melbourne Water will maintain responsibility for waterway habitat, conducting sediment removal and weed control works whenever deemed necessary. City of Casey will maintain responsibility for monitoring and removing rubbish. This arrangement continues management practices already in place. It should be noted that maintenance requirements for waterway environments are expected to actually decrease as a result of this project, given the introduction of WSRD, the blocking of access to the waterways, and the planned increase to fringing Swamp Scrub vegetation.

5.5.2. Contingency Planning / Memorandum of Understanding

The contingency planning protocol that applies during the construction phase (see Section 7.3) must continue through the post-construction phase, so that any threat or impact to the dwarf galaxias population is dealt with immediately that it is identified. The contingency planning protocol will continue to be read as written in Section 7.3, with the following minor changes to allow for the change in personnel that will be found on-site:

• Where “site manager” is written, read “City of Casey”; • Where “project manager” is written, read “City of Casey”; and • Where “construction staff” is written, read anybody conducting works on-site, whether from the

City of Casey, Melbourne Water, or contractors conducting works related to this CMP. In the event that any threat or adverse impacts to dwarf galaxias or their habitat is noted, emergency response procedures must be instituted immediately, following the contingency planning protocol (see Section 7.3, with adjustments made as detailed above). Threats or adverse impacts that will institute emergency response procedures include, but are not limited to:

• Removal or degradation of supporting fringe Swamp Scrub vegetation; • Altered hydrology such as choking of waterways by weeds; • Reduced water flow resulting from extended dry periods; • Drying due to inadvertent draining of the channel or interruption of its water supply lines; • Reduction in water quality through excessive sedimentation, or chemical pollution as a result

of illegal dumping, roadway accident or industrial incident; and



• A rise in pest species such as Gambusia holbrooki, which might arise from any of the factors listed above.

In addition to the contingency planning protocol, a Memorandum of Understanding (MOU) between the City of Casey and Melbourne Waterwill take effect. This MOU supports the contingency planning protocol by detailing the responsibilities that Melbourne Water will take to share responsibility for the ongoing viability of the dwarf galaxias population. Melbourne Water will:

• Provide supplementary watering of the northern channel as and when deemed necessary through the post-construction period, as informed by the City of Casey, Melbourne Water staff, expert ecologists / zoologists, ANGFA (Australian New Guinea Fishes Association), and NFA (Native Fish Australia); and

• Communicate any issues (i.e. threats or adverse impacts to dwarf galaxias or their habitat) noted on-site to the City of Casey.

In addition to supporting the ongoing efficacy of the contingency planning protocol, the MOU will help establish collaborative approaches to management that will facilitate the long-term management and maintenance, and even extension, of the dwarf galaxias population and its habitat.


Quarterly surveys at the five locations specified in Section 5.3.2 will be undertaken by the Dwarf Galaxias Consultant once construction has been completed. The consultant will ensure that methods used are appropriate to the season in which the monitoring is being undertaken, and appropriate to the condition of the channel section being monitored Survey data that will be collected include all those attributes / parameters collected during the pre-construction and the construction surveys (dwarf galaxias population structure, riparian and in-stream vegetative habitat quality, and in-situ water quality, the specifics of each being as already detailed in Section 5.3.2). Ecological Indicators (EIs), and EI targets, will be as for the weekly construction monitoring program (see Section 5.4.3). On an annual basis during the post-construction period, a survey report that includes assessment of the results against EI targets will be prepared by the Dwarf Galaxias Consultant and provided to DSE for review. Additionally, if unforeseen events such as pollution spills or unexpected losses of dwarf galaxias occur during the post-construction period, the Dwarf Galaxias Consultant will report these events to SEWPAC’s Monitoring and Audit Section. In the event that EI targets are not met, an emergency meeting will be called between the consultant, the City of Casey and DSE, to address the issue and determine required actions. The consultant must be given appropriate authority to instigate the appropriate controls / mitigation measures that he deems necessary.

5.6. LONG-TERM MANAGEMENT AND MAINTENANCE

This CMP, and the CEMP to follow, will remain in effect until ten years into the post-construction phase. Following this, the City of Casey will retain responsibility for the maintenance of the land habitat supporting the dwarf galaxias population, while Melbourne Water will retain responsibility for the drainage channels. Both will manage their responsibilities with the aim of ensuring the long-term viability of the dwarf galaxias population within the northern channel specifically, and the wider O’Grady Road drainage channel system more generally.



Long-term management and maintenance requirements will be determined by City of Casey during a review to be conducted at the end of ten years into the post-construction phase, in consultation with the Dwarf Galaxias Consultant, Melbourne Water and DSE. The review must consider:

• All updates to the CMP that were required throughout its period of effect during the construction and post-construction phases;

• The results of all regular monitoring events (pre-construction surveys, weekly construction surveys, and quarterly post-construction surveys) as reported to DSE throughout the duration of the CMP being in effect, regarding dwarf galaxias population numbers and structure, riparian and in-stream vegetative habitat quality, and in-situ water quality;

• The results of all irregular monitoring events conducted during the construction period (conducted after each high rainfall event (rainfall >25mm in a day), during each enactment of the contingency planning protocol, after any spills, and after the receding of any flood waters);

• The results of all irregular monitoring events conducted during the post-construction period (during each enactment of the contingency planning protocol, including after any spills);

• The degree of success (or otherwise) of all salvage and translocation events; • The degree of success (or otherwise) of the revegetation programs conducted on the bunded

buffer zone between the northern channel and the upgraded O’Grady Road, immediately to either side of the northern and southern channels, immediately to either side of the two open air weirs, and within the two open air weirs;

• The degree of success (or otherwise) of the regeneration of Swamp Scrub vegetation along the reclaimed width of O’Grady Road;

• Any trends in the level of weed control works deemed necessary each spring throughout the CMP’s period of effect during the construction and post-construction phases;

• Any incidents that required implementation of the contingency planning protocol during the construction and the post-construction phases;

• The degree of success (or otherwise) of each implementation of the contingency planning protocol;

• The degree of success (or otherwise) of all post-construction habitat management and maintenance arrangements for WSRD structures, cyclone fences, locked gates, remnant and revegetated Swamp Scrub, regenerating Swamp Scrub, channels and open air weirs; and

• The degree of success (or otherwise) of the operation of the MOU throughout the post-construction period.

The ongoing management and maintenance issues that must be implemented for the long-term include:

• Water quality monitoring to address any runoff issues that arise from the upgraded O’Grady Road and from any future developments along its length; and

• Contingency plans to address any potential issues that arise from the presence of future developments along the upgraded O’Grady Road’s length, including (but not limited to) changes to hydrology, contaminated runoff, or physical disturbance to the northern channel or its surrounding habitat.

The ongoing management and maintenance of these issues will be formalized througha continuation of the MOU, once it has undergone review and adjustment at the end of ten years into the post-construction phase. Additional issues to consider for ongoing long-term management and maintenance include:

• Monitoring for dwarf galaxias; • Monitoring for biological threats such as Gambusia holbrooki; • Monitoring for habitat viability (eg. extended dry periods, and/or water loss events, leading to

reduced volume and quality of habitat);



• Contingency plans to address the potential identification of other biological or physical threats to dwarf galaxias;

• Maintenance of WSRD, cyclone fencing and locked gates; • Maintenance of remnant, revegetated and regenerating vegetation through weed control

works and supplementary planting if required; and • Maintenance of waterways through removal of sediment, weeds and rubbish if required.



6. SCHEDULES Schedules for the actions detailed in Section 5 are summarised in the tables below, as follows:

• Table 6.1 – implementation / mitigation actions; • Table 6.2 – monitoring and reporting; • Table 6.3 – ongoing management (post-construction); and • Table 6.4 – development sequencing.

Abbreviations for the responsible agents identified within Tables 6.1 – 6.3 are as follows:

• PM – the Project Manager (generally responsible for design and construction program issues); • SM – the Contractor’s Site Manager (generally responsible for construction site management issues); • SS – the Contractor’s Site Supervisor (generally responsible for monitoring activities and ensuring that the Contractor fulfills environmental

management responsibilities); and • DGC – the Dwarf Galaxias Consultant (generally responsible for ensuring that all strategies for monitoring, assessing and translocating dwarf galaxias

are sufficient to secure their protection).



Table 6-1 Implementation / Mitigation Schedule

Action Method of implementation

Responsible agent / funding source

Timelines for commencement and completion

Measurable standard Contingency plan / adaptive management

Establish no-go zones.

Temporary parafence or equivalent to be established around no-go zones, shown in Appendix C.

SM / contractor

Before commencement of construction, to remain until the cyclone fence north of the revegetated bunded buffer zone has been erected.

No-go zones as fenced off will be checked and approved by the DGC. Clear separation of construction and no-go zones by a high visibility barrier. SS will ensure its maintenance as an upright and tight fence.

If no-go zones are not approved by the DGC, fencing location will be adjusted to the satisfaction of the DGC. If temporary fence becomes loose or falls over, SS will arrange for required maintenance.

Conduct of any works that breach the walls of the northern channel.

Such works must be limited to the non-breeding season of 1stDecember to 31stMarch. Use hay bales and filter cloth sediment traps to prevent sediment runoff into the channel. Immediately stabilize newly worked earth with geotextile.

SM / contractor

1stDecember to 31stMarchonly .

Breaching of northern channel walls at approved times of year only, with no sediment observed to enter the northern channel.

If breaching of northern channel walls do occur during the 1stApril – 30thNovember breeding season, or if sediment is observed to be entering the northern channel, works must cease immediately and the SM will inform the PM, who will notify the to check the damage and devise appropriate on-ground responses.







Implement sediment and erosion control structures.

Utilize diversion drains stabilized with geotextiles and rock armoring to divert runoff away from exposed areas of soil. Use hay bales and filter cloth sediment traps to retard water flow and entrain sediment. These structures will be particularly carefully placed to the south of any exposed areas of soil to protect the water quality of the northern channel. If more guidance is required, see Environmental guidelines for major construction sites (EPA 1996) and Construction techniques for sediment pollution control (EPA 1991).

SM / contractor

Ongoing, implemented within the locality of any earthworks before they have begun, and until after they have been successfully stabilized. Also to be implemented along the southern length of the construction zone, to remain until construction has ceased and all earthworks have been successfully stabilised.

No sign of sediment eroding away from exposed areas of soil towards local drainage lines, most particularly, the northern channel.

If sediment observed running away from exposed areas of soil, SS will arrange for maintenance / better arrangement of diversion drains and sediment traps.

Control erosion and sediment from stockpiles.

Locate stockpiles away from drainage lines, and cover the stockpiles with tarpaulins.

SS / contractor Ongoing, implemented as each stockpile is established, and in effect until the stockpile has been removed.

No sign of sediment eroding away from stockpiles towards local drainage lines, most particularly, the existing O’Grady Road Reserve’s northern channel.

If sediment observed running away from stockpiles, SS will check relevant stockpile for cause of erosion. If stockpile found to be on a drainage line, it will be moved. If stockpile eroding from top, it will be more effectively covered.







Monitor sediment and erosion control.

Monitor correct placement and effectiveness of sediment and erosion controls.

SS / contractor Ongoing throughout the period of construction works. At a regular weekly time to be established by the SS. Additionally, during (if rain occurs during work hours) or after (if rain occurs outside work hours) a high rainfall (>25mm in a day) event.

Evidence of the site inspections, in the form of dated form sheets or a site diary.

If site inspections find erosion / sediment problems, contingency plan is as per the preceding two rows of this table. If high rainfall events are found to be leading to localized flooding or tracking of mud through the site by construction vehicles, any works leading to the disturbance or spread of mud must cease. If site inspections are not being undertaken as required, the PM must meet with the SM and the SS and ensure better implementation of inspections.







Stabilize completed earthworks.

Progressively (as each area of earthworks is completed) spread and scarify topsoil over the area to be stabilized. Then hydroseed with sterilized grasses to stabilize the soil, ensuring that grasses are kept adequately watered while establishing. At no stage use fertilizers. Once grasses are established, revegetate the bunded buffer zone that is designated between the southern edge of the upgraded road and the no-go zone with local providence indigenous species appropriate to the site’s Swamp Scrub EVC, particularly Melaleuca ericifolia, at frequencies conducive to establishing benchmark canopy structures in the long-term. See EVC / Bioregion Benchmark for Vegetation Quality Assessment, Gippsland Plain Bioregion, EVC 53: Swamp Scrub, included as Appendix D, for some typical species. The exact species mix and planting frequency will be determined in the contractor’s CEMP.

SM / contractor

Grasses will be planted progressively across the site, as soon as possible within each area once its earthworks have been completed. Swamp Scrub vegetation will be planted as soon as possible, but during mild, wet conditions. Springtime planting is best, while summertime planting is best avoided unless care is taken to implement a watering regime sufficient to allow for successful plant establishment.

Successful establishment of grasses over 80% of planted area. Successful creation of Swamp Scrub EVC in planted areas with 80% success rate of plantings. Success of the Swamp Scrub revegetation will be checked and approved by a suitably qualified ecologist.

If grasses fail to successfully establish, repeat hydroseeding and ensure that watering regime is sufficient to encourage the grass’s establishment. If Swamp Scrub plantings don’t reach an 80% success rate, conduct infill planting each springtime until an 80% success rate is achieved.







Protect dwarf galaxias from chemical spills.

Establish an impermeable bunded area (or a bunded pallet), of sufficient size to contain any spills, for the storage of all chemicals which are to be kept onsite. Bund to be established as far away from the northern channel as construction works allow, and away from more localized drainage lines. Keep a spill kit onsite at all times and ensure that site workers are familiar with its location and usage.

SM / contractor

Before bringing any chemicals onto the construction site, to remain in place until construction has been completed and all chemicals removed from site.

No chemical spills onsite. Evidence of training for all site workers in spill kit location and usage, in the form of signed induction sheets.

If a chemical spill does occur, nearest personnel must utilize spill kit to minimize its spread, particularly towards the northern channel. SM will inform PM, who will notify the DGC and engage a contaminated land consultant, both of whom will check the damage and devise appropriate on-ground responses. If the spill has reached the channel, the DGC may decide to utilize the emergency water supply to flood the channel and dilute the contaminants. Post-incident monitoring by the DGC will be repeated at weekly intervals until the contaminant is no longer considered to be a threat.

Prevent drying out of northern channel.

Establish an emergency water supply on-site, for use in the event that the channel is inadvertently drained or its water supply is inadvertently interrupted.

SM / contractor

Before commencement of construction, through until the post-construction MOU takes effect.

Emergency water supply kept on-site; SS will ensure it is kept replenished at all times.

If emergency water supply is used to replenish the northern channel, or is emptied for any other reason, SS will arrange for required top up.







Ensure no disturbance / removal of indigenous vegetation, other than that which has been approved.

Check that no protected vegetation (i.e. indigenous vegetation not specifically approved for removal) lies outside of no-go zones. Check that any vegetation about to be removed has been approved for this removal. Indigenous vegetation which has been approved for removal is detailed in Appendix C.

SM & SS / contractor

During establishment of no-go zones (before commencement of construction). Ongoing throughout the period of construction works, whenever vegetation removal is scheduled.

No disturbance / removal of indigenous vegetation, other than that which has been approved (detailed in Appendix C).

If protected vegetation is damaged or removed, SM will inform PM, who will engage a suitably qualified ecologist to check the damage and devise appropriate on-ground responses.

Improve wider habitat through revegetation along the bunded buffer zone, additionally minimizing the risk of pest (Gambusia holbrooki) incursion.

Revegetate with local providence indigenous species appropriate to the site’s Swamp Scrub EVC, with a dominance of Melaleuca ericifolia, at frequencies conducive to establishing benchmark canopy structures in the long term (see Appendix D for some typical species, and note that the exact species mix and planting frequency will be determined in the contractor’s CEMP).

SM / contractor

Revegetation will preferably occur during mild, wet conditions. Springtime planting is best, while summertime planting is best avoided unless care is taken to implement a watering regime sufficient to allow for successful plant establishment.

Successful creation of Swamp Scrub EVC with 80% success rate of plantings. Success of the Swamp Scrub revegetation will be checked and approved by a suitably qualified ecologist.

If Swamp Scrub plantings don’t reach an 80% success rate, conduct infill planting each springtime until an 80% success rate is achieved.







Improve dwarf galaxias habitat through revegetation along northern and southern channels and along the two weirs, additionally minimizing the risk of pest (Gambusia holbrooki) incursion.

Conduct weed control works as recommended by a suitably qualified weed contractor: ensure that contractor understands that use of herbicides is to be minimized wherever possible, and that herbicides must not impact the water quality of the northern channel. Then revegetate with local providence indigenous species appropriate to the site’s Swamp Scrub EVC, with a dominance of Melaleuca ericifolia, at frequencies conducive to establishing benchmark canopy structures in the long term (see Appendix D for some typical species, and note that the exact species mix and planting frequency will be determined in the contractor’s CEMP).

PM / contractor

Weed control works will be conducted in spring. Revegetation will preferably occur during mild, wet conditions. Springtime planting is best, while summertime planting is best avoided unless care is taken to implement a watering regime sufficient to allow for successful plant establishment.

Successful creation of Swamp Scrub EVC in planted areas with 80% success rate of plantings. Success of the Swamp Scrub revegetation will be checked and approved by a suitably qualified ecologist.

If Swamp Scrub plantings don’t reach an 80% success rate, conduct infill planting each springtime until an 80% success rate is achieved.







Improve wider habitat through regeneration along the verges of the old O’Grady Road that had previously been subjected to slashing, additionally minimizing the risk of pest (Gambusia holbrooki) incursion.

Reduce slashing works along the old O’Grady Road to allow for natural recruitment from adjacent vegetation. Conduct weed control works as recommended by a suitably qualified weed contractor: ensure that contractor understands that use of herbicides is to be minimized wherever possible, and that herbicides must not impact the water quality of the northern channel.

PM / contractor

Slashing will cease upon commencement of the project and will not be conducted again. Weed control works will be conducted in spring.

Successful long-term regeneration of Swamp Scrub EVC. Likely long-term success of the Swamp Scrub vegetation will be checked and approved by a suitably qualified ecologist.

If Swamp Scrub does not appear to be successfully regenerating, conduct infill planting each springtime as per the ecologist’s recommendations.







Improve aquatic habitat through revegetation of two open air weirs, additionally minimizing the risk of pest (Gambusia holbrooki) incursion.

Revegetate with local providence indigenous species appropriate to the site’s Swamp Scrub EVC, particularly aquatic species, with the exact species mix and planting frequency to be determined in the contractor’s CEMP.The species mix will additionally incorporatethe following plant association, which has been noted to create favourable habitat for dwarf galaxias (pers. comm. John McGuckin): Water Ribbons (Triglochin procerum); Spike-sedge (Eleocharis spp.); Floating Pondweed (Potamogeton tricarinatus); Finger Rush (Juncus subsecundus); and Slender Knotweed (Persicaria decipens).

PM / contractor

Revegetation will preferably occur during wet conditions when the weirs are gently flowing.

80% success rate of plantings. Success of the Swamp Scrub revegetation will be checked and approved by a suitably qualified ecologist.

If plantings don’t reach an 80% success rate, conduct infill planting until an 80% success rate is achieved.



Table 6-2 Monitoring and Reporting Schedule



Timelines for monitoring

Frequency of monitoring Measurable standard Contingency plan /

adaptive management

Regular site inspections.

SS will conduct regular site inspections specifically checking the condition of: • The fence separating the

construction and no-go zones.

• The protected vegetation within the no-go zones.

• Sediment and erosion controls.

• The bunded chemical storage area.

SS / contractor Throughout the construction period.

Weekly, at a regular time to be established by the SS. Additionally, during (if rain occurs during work hours) or after (if rain occurs outside work hours) a high rainfall (>25mm in a day) event.

Evidence of the site inspections, in the form of dated form sheets or a site diary. Site inspection results indicating no problems with the condition of fencing, protected vegetation, sediment / erosion controls, chemical storage or bunding.

If a site inspection identifies problems with fencing, sediment / erosion controls or bunding, SS will arrange for immediate maintenance to fix the problems. If an unreported case of damage to or removal of protected vegetation is identified, implement the contingency plan as per Table 6.1, row 9. If evidence of an unreported chemical spill is identified, contingency plan is as per Table 6.1, row 7. If site inspections are not being undertaken as required, the PM must meet with the SM and the SS and ensure better implementation of inspections.







adaptive management

Pre-construction surveys for, and reporting on, dwarf galaxias, habitat quality, and in-situ water quality.

Will be conducted by the DGC in five specific locations (wetland, reaches 1 – 3 and the control site, see Section 5.3.2 for details).

SM / contractor

Prior to earthworks that breach the northern channel or removal of any significant vegetation approved for removal (see Appendix C).

As required by first instance of scheduled upcoming earthworks / vegetation removal works.

Survey report will be provided to DSE for review before earthworks / vegetation removal.

If dwarf galaxias are found to be present in the section to be breached by earthworks, translocation will (or may) occur according to the protocol for salvage and translocation (see Section 7.1).

Periodic monitoring for, and reporting on, dwarf galaxias, habitat quality, and in-situ water quality.


SM / contractor

Throughout the construction period.

Weekly. Additionally, after a high rainfall (>25mm in a day) event and after any spills. And additionally, to reset baseline data after receding flood waters.

Quarterly survey reports including assessment of results against EI targets will be provided to DSE for review. Survey reports indicating that the dwarf galaxias population in the northern channel has not been unacceptably affected by site works.

If EI targets are not met, an emergency meeting will be called between the DGC, the contractors, the City of Casey and DSE, to address the issue and determine required actions (eg. utilizing the on-site emergency fresh water supply to supplement the northern channel’s water level). If pollution spills or unexpected dwarf galaxias loss occur, the DGC will report such occurrence to SEWPAC’s Monitoring and Audit Section.







adaptive management

Periodic post-construction surveys for, and reporting on, dwarf galaxias, habitat quality, and in-situ water quality.


PM / City of Casey

For ten years following the completion of construction.

Quarterly. Annual survey reports including assessment of results against EI targets will be provided to DSE for review. Survey reports indicating that the dwarf galaxias population in the northern channel is not declining.

If EI targets are not met, an emergency meeting will be called between the DGC, the City of Casey and DSE, to address the issue and determine required actions. If pollution spills or unexpected dwarf galaxias loss occur, the DGC will report such occurrence to SEWPAC’s Monitoring and Audit Section.



Table 6-3 Post-construction Management Schedule



Timelines Frequency Measurable standard Contingency plan / adaptive management

Improve indigenous vegetation quality across the site with weed control.

Engage a suitably qualified weed contractor to assess what weed control works are required, and to then conduct them. Ensure that contractor understands that use of herbicides is to be minimized wherever possible, and that herbicides must not impact the water quality of the northern channel.

PM / City of Casey


Every year during spring, through the full ten year post-construction phase.

Standard to be achieved is to be defined each year, in agreement between the weed contractor and the PM, during the assessment of what weed control works are necessary.

If the PM feels that the standard of works has not been met, or if the ecologist engaged as detailed in rows 2 and 3 below, feels that the standard of works is insufficient, additional weed control will be conducted until weeds are adequately controlled.






Improve indigenous vegetation quality along northern and southern channels, along the two weirs, and along the bunded buffer zone, additionally minimizing the risk of pest (Gambusia holbrooki) incursion.

Engage a suitably qualified ecologist to assess whether weed control, revegetation works or fence maintenance is required.

PM / City of Casey


Every year during spring, following the weed control works detailed in row 1 above.

Assessment report indicating that the quality of the Swamp Scrub along the northern and southern channels, the two weirs, and the bunded buffer zone is improving relative to previous years.

If the quality of the Swamp Scrub along the northern and southern channels, the two weirs, and the bunded buffer zone is found to be declining, ecologist will determine what weed control, revegetation works and/or fence maintenance would redress the situation. PM will then ensure that required works are conducted – note that fertilizers must not be used onsite, that the use of herbicides is to be minimized wherever possible, and that herbicides must not impact the water quality of the northern channel.






Improve indigenous vegetation quality along the reclaimed width of the current O’Grady Road and along the verges that had previously been subjected to slashing, additionally minimizing the risk of pest (Gambusia holbrooki) incursion.

Engage a suitably qualified ecologist to assess whether weed control or revegetation works are required.

PM / City of Casey



Assessment report indicating that Swamp Scrub is successfully regenerating through the former road reserve.

If Swamp Scrub regeneration through the former road reserve is found to be sluggish or to have ceased altogether, ecologist will determine what weed control and/or revegetation works would redress the situation. PM will then ensure that required works are conducted – note that fertilizers must not be used onsite, that the use of herbicides is to be minimized wherever possible, and that herbicides must not impact the water quality of the northern channel.

Maintain aquatic habitat in channels and weirs, additionally minimizing the risk of pest (Gambusia holbrooki)

Conduct sediment removal and weed control works.

Melbourne Water / Melbourne Water


Whenever regular inspection identifies the need for works.

Maintenance or improvement of dwarf galaxias habitat, as noted by the Dwarf Galaxias Consultant during ongoing monitoring (see row 8 below).

If the Dwarf Galaxias Consultant, or anyone conducting regular inspections of the waterways, identifies any threats or adverse impacts to dwarf galaxias, implement the contingency plan (see Section 5.3).






incursion. Conduct rubbish removal works.

PM / City of Casey


Whenever regular inspection identifies the need for works.

Maintenance or improvement of dwarf galaxias habitat, as noted by the Dwarf Galaxias Consultant during ongoing monitoring (see row 8 below).

If the Dwarf Galaxias Consultant, or anyone conducting regular inspections of the waterways, identifies any threats or adverse impacts to dwarf galaxias, implement the contingency plan (see Section 5.3).

Maintain WSRD Remove litter, sediment and excessive organic materials and dispose of these off-site.

PM / City of Casey


As per standard City of Casey roadway stormwater maintenance works.

WSRD structures that are not blocked or overflowing due to excessive litter, sediment or organic materials.

If WSRD structures are found to be blocked or overflowing, PM will ensure that required works are conducted.

Maintain cyclone fences

The ecologist assessing the quality of the Swamp Scrub along the northern and southern channels, the two weirs, and the bunded buffer zone will note whether these protected zones are adequately secured by the condition of the cyclone fences to the north.

PM / City of Casey



Assessment that the cyclone fences to the north continue to adequately protect the no-go zones.

If the cyclone fence is found to require maintenance, PM will ensure that required works are conducted.






Maintain locked gates

The Melbourne Water / SP Ausnet personnel accessing the former O’Grady Road will note the condition of the locks and gates that protect the no-go zones.

Melbourne Water & SP Ausnet / Melbourne Water & SP Ausnet


Whenever the former O’Grady Road is accessed.

Assessment that the locks and gates continue to adequately protect the no-go zones.

If the locks and/or gates require maintenance, the service utility personnel who discovered this will ensure that required works are conducted.

Ongoing monitoring for, and reporting on, dwarf galaxias, habitat quality, and in-situ water quality.

See Table 6.2, row 4.

Table 6-4 Sequencing Schedule

Pre-construction During construction (December 2012 – 2013) Post-construction (2013 – 2023)

Establish temporary no-go zones.

Establish permanent no-go zone.

Check that no protected vegetation lies outside of no-go zones.

Check that any vegetation scheduled for removal has been approved for this.

Vegetation approved for removal can be removed once this has been verified.




Implement sediment and erosion control structures. Earthworks permitted only where sediment and erosion control structure are already implemented.

Monitor sediment and erosion control.

Stabilize completed earthworks.

Establish bunding for chemical storage.

Chemicals permitted onsite, within the bunded storage, once it has been established.

Remove bunding only after all chemicals have been removed from site.

Dwarf galaxias surveys in each channel section as required by scheduled upcoming earthworks that breach the northern channel or vegetation removal works.

Salvage and translocation of dwarf galaxias if required.

Scheduled breaching earthworks can progress once the dwarf galaxias have been safely translocated, as communicated by the Dwarf Galaxias Consultant.

Weekly monitoring for dwarf galaxias, habitat quality, and in-situ water quality, and additionally after each high rainfall (>25mm in a day) event and any spills.

Quarterly monitoring for dwarf galaxias, habitat quality, and in-situ water quality.

Assessment of weeds, and weed control as deemed necessary.

Annual assessment of weeds, and weed control as deemed necessary.




Natural regeneration of Swamp Scrub EVC along the former road reserve.

Revegetation of Swamp Scrub EVC on the bunded buffer zone.

Revegetation of Swamp Scrub EVC immediately to either side of the northern and southern channels, to either side of the two weirs, and within the two weirs.

Annual maintenance / improvement of all indigenous vegetation.



7. PROTOCOLS Protocols for salvage and translocation, for reporting, and for contingency plans, as referred to throughout this CMP, are detailed in the following sections.

7.1. PROTOCOL FOR SALVAGE AND TRANSLOCATION

As detailed in this CMP’s introduction, a suitably qualified Dwarf Galaxias Consultant will be engaged throughout the period in which this CMP remains in effect, to ensure that all strategies for monitoring, assessing and translocating dwarf galaxias are at all times suitable for the changing environmental and seasonal conditions. Salvage and translocation will be required whenever pre-construction monitoring (see Section 5.3.2) has identified dwarf galaxias in a section of the northern channel where earthworks will occur below the channel’s water level. This will amount to:

• Infilling of the eastern end of the northern channel and its replacement with piping; and • Construction of the two box culverts into the northern wall of the northern channel.

In addition, salvage and translocation will be required if the Dwarf Galaxias Consultant has identified dwarf galaxias in a section of the northern channel where earthworks will occur above the channel’s water level, and the consultant is concerned that the quality of water inflow might be more detrimental to the dwarf galaxias than the stress and risk involved with salvage and translocation operations. Works that might thus require salvage and translocation operations will amount to:

• Construction of WSRD inputs into the northern wall of the northern channel; and • Construction of the two weirs into the southern wall of the northern channel.

It is important to note that at no point must earthworks be allowed to breach the northern channel during the breeding season (1stApril to 30thNovember); such works must be limited to the period between 1stDecember and 31stMarch. Whenever salvage and translocation are required, the following actions will be undertaken:

• Approval for the salvage and translocation will be necessary from DSE, DPI, Melbourne Water and City of Casey. Contractors will apply for the DPI translocation permit in advance, given the high likelihood that the species will be present;

• The reach that is to undergo works will be isolated from the rest of channel for the full period of earthworks, and until the Dwarf Galaxias Consultant is satisfied that the reach has been adequately stabilized;

• The method of isolating the reach will involve the use of impermeable barriers installed in such a way as to minimize disturbance of the channel’s sediment substrate. The exact materials to be used and the method of installation must be agreed upon by the contractors and the Dwarf Galaxias Consultant before works are undertaken, but current preference is for the use of sandbags rather than sheet piles;

• If required by the Dwarf Galaxias Consultant, sediment control measures must be placed downstream of the waterway barrier to prevent a degradation of downstream water quality;

• Before the actual salvage and translocation operations begin, the Dwarf Galaxias Consultant must first determine the best release site for the dwarf galaxias. It is preferable that the



release site be located as close as possible to the catch site in order to minimize the stress of translocation, and because the presence of dwarf galaxias within that stretch would tend to indicate favourable conditions. However, localized conditions such as aquatic habitat quality, fringing terrestrial vegetation, hydrology, water quality and the likely presence or absence of Gambusia holbrooki may make translocation to another location within the northern channel more desirable. The consultant may also choose to translocate the dwarf galaxias to a number of release sites, in order to increase the chances that at least one site succeeds;

• The Dwarf Galaxias Consultant will salvage dwarf galaxias using dip nets during daylight hours and bait traps overnight, repeating the procedure until he is satisfied that the traps are no longer catching dwarf galaxias, which will be used as the Ecological Indicator (EI) that he has therefore salvaged as many individuals as possible. The consultant will use equipment and hygiene as deemed appropriate to the environmental and seasonal conditions, and will monitor water quality parameters within the temporary storage and transportation vessels to ensure that they remain close to the water quality as measured at the catch site immediately before draining. If water quality within the temporary storage and transportation vessels begins to differ significantly from that of the pre-drainage catch site, the consultant must translocate the dwarf galaxias which have already been salvaged to their release site immediately, or take steps to ensure the return of water quality parameters to acceptable levels;

• At all times, the Dwarf Galaxias Consultant will ensure that the salvage and translocation procedures being adopted are in accordance with the translocation protocols adopted by both State and Federal governments, and with issued permit conditions; and

• The success of the salvage and translocation works will be assessed and ensured by the presence of the Dwarf Galaxias Consultant during drainage operations. The Ecological Indicator (EI) that salvage and translocation have already been successfully completed will be the absence of any individuals remaining in the channel at the end of drainage operations; if any individuals are noted as the last of the water is being drained, the Dwarf Galaxias Consultant will immediately salvage them for translocation.

7.2. PROTOCOL FOR REPORTING

In addition to the monitoring reports detailed in Table 6.2, an annual report regarding the implementation of the CMP is to be produced by an independent and suitably qualified environmental consultant. This report is to be presented to DSE and SEWPAC, and is to detail:

• Results of all monitoring rounds conducted since the previous annual report; • The results of each implementation / mitigation action in terms of its measurable standard

(detailed in Table 6.1) during the construction period; and • The results of each post-construction management action in terms of its measurable standard

(detailed in Table 6.3) for the ten years following the completion of construction. This CMP will take effect from the date of its approval by the responsible authority (City of Casey), and will remain in effect until ten years into the post-construction phase. During that period, it will require regular review from the relevant stakeholders including:

• City of Casey; • DSE; • Melbourne Water; and • SEWPAC.

Review will occur on an annual basis, and additionally whenever an event has required the implementation of the protocol for contingency plans (see Section 7.3 below).



7.3. PROTOCOL FOR CONTINGENCY PLANS

In the event that any threat or adverse impacts to dwarf galaxias or their habitat is noted, the following emergency response procedures must be instituted immediately:

• The incident will be reported to the site manager; • The site manager will notify the project manager and advise the Dwarf Galaxias Consultant to

assess the damage, while the project manager will notify DSE of the incident; • The Dwarf Galaxias Consultant will conduct population surveys and any other sampling

deemed necessary; • The Dwarf Galaxias Consultant will devise appropriate on-ground responses, which might

include (but are not limited to) isolating the impacted stretch with sandbags, restoring any damaged fringe Swamp Scrub vegetation, stabilizing the source of any excess sedimentation, restoring beneficial hydrological flow through the removal of choking weeds or rubbish, increasing water quality and/or water volume with an emergency water supply, instituting salvage / translocation operations (sandbags and an emergency water supply must be maintained on-site to provide for the potential initiation of these contingency plans), or instituting additional revegetation works to provide more thorough shading and/or to eliminate open water;

• On-ground responses will be conducted under the supervision of the Dwarf Galaxias Consultant;

• Specifically, pest incursion will already have been dealt with by appropriate planting during the construction phase (see Table 5.1 “Habitat improvement”) and the post-construction phase (see Table 5.2 “Remnant and revegetated Swamp Scrub” and “Regenerating Swamp Scrub”).Gambusia holbrooki favour open waters, whilst dwarf galaxias favour waters that are shaded. Gambusia holbrooki may not be completely excluded by the elimination of open water and the provision of thorough shading that will result from the project’s habitat improvement works, but numbers will remain at low levels, similar to those found in other nearby habitats at which dwarf galaxias survive and successfully breed (pers. comm. John McGuckin);

• In the event of a fuel or chemical spill, emergency response procedures will be instituted as specifically detailed in Section 7.3.1 below; and

• It is important to note that, whenever emergency response procedures are instituted, the Dwarf Galaxias Consultant must be given appropriate authority to instigate the appropriate controls / mitigation measures that he deems necessary.

7.3.1. Protocol for Spill Response

An unforeseen pollution event is a key trigger for requiring immediate action by the Dwarf Galaxias Consultant to assess the dwarf galaxias population in O’Grady Road’s northern channel and to devise appropriate on-ground responses. Such pollution events constitute any and all liquid pollutant spills that occur in the construction zone, as well as any from outside the construction zone that could possibly impact O’Grady Road’s northern channel. Emergency response procedures are as detailed above, but key requirements are given in more detail below. The site manager is responsible for communicating these requirements to all site workers during all inductions and all toolbox talks:

• All construction work in the vicinity of any fuel or chemical spill will immediately cease; • Construction staff will immediately report the spill to the site manager; • The site manager will immediately advise the Dwarf Galaxias Consultant via mobile phone;



• The Dwarf Galaxias Consultant will assess the damage, conduct population surveys and any other sampling deemed necessary, and devise the most appropriate course of action, which might include (but is not limited to) instituting a site-wide stop work, placing bunding around the spill site, isolating the impacted stretch of water with sandbags, increasing water quality and/or water volume with an emergency water supply, instituting salvage / translocation operations, and instituting follow-up survey works for contaminants of concern;

• Sandbags and an emergency water supply must be maintained on-site to provide for the potential initiation of these contingency plans;

• If the determined course of action requires action on the part of construction staff, the Dwarf Galaxias Consultant will pass on instructions to the site manager accordingly. It is important to note that the Dwarf Galaxias Consultant must be given appropriate authority to instigate the appropriate controls / mitigation measures that he deems necessary. On-ground responses by construction staff will be conducted under the supervision of the Dwarf Galaxias Consultant;

• If the determined course of action requires translocation, the Dwarf Galaxias Consultant would collect as many dwarf galaxias as possible from the contaminated area and move them to another (unaffected) part of the same channel. If the entire channel has been affected, collected fish may need to be taken off-site for temporary holding until conditions are assessed as acceptable for the reintroduction of the dwarf galaxias. Salvage and translocation works will be undertaken in accordance with Section 7.1;

• If the Dwarf Galaxias Consultant has called a halt to site works, they must not be recommenced until he has given the go-ahead; and

• If the Dwarf Galaxias Consultant has instituted additional survey works for contaminants of concern, these will be conducted at weekly intervals until the contaminant is no longer considered to be a threat.



8. KEY RESPONSIBILITIES The project contractors will be responsible for:

• Ensuring that all identified procedures are conducted as specified through the pre-construction phase, the construction phase, and the defects liability period of the post-construction phase;

• Ensuring that all maintenance, monitoring and surveys are conducted by the appropriate personnel as specified throughout the same period; and

• Reporting incidents that may have a negative impact on the dwarf galaxias population and/or supportive habitat to the Dwarf Galaxias Consultant and the City of Casey.

The City of Casey will be responsible for:

• Reporting incidents that may have a negative impact on the dwarf galaxias population and/or supportive habitat to DSE;

• Revising the CMP on an annual basis and additionally whenever incidents that may have a negative impact on the dwarf galaxias occur, or significant additional information becomes available;

• Ensuring that all identified procedures are conducted as specified following the end of the defects liability period through the rest of the post-construction phase, while the CMP remains in effect;

• Ensuring that all maintenance, monitoring and surveys are conducted by the appropriate personnel as specified throughout the same period; and

• Ensuring that appropriate long-term procedures are developed during a review at the end of the post-construction phase, and that these procedures are then adopted through a Memorandum of Understanding.

The Dwarf Galaxias Consultant will be responsible for:

• Ensuring that all strategies for monitoring, assessing and translocating dwarf galaxias are at all times suitable for the changing environmental and seasonal conditions;

• Informing DSE of all monitoring and survey results; • Assessing the damage associated with all reported incidents of negative impact to dwarf

galaxias population and/or supportive habitat; • Devising appropriate responses to any damage to the dwarf galaxias population and/or

supportive habitat; and • Supervising the implementation of all such responses.

It is reiterated that, whenever emergency response procedures are instituted, the Dwarf Galaxias Consultant must be given appropriate authority to instigate the appropriate controls / mitigation measures that he deems necessary.



9. CONCLUSION The proposed O’Grady Road upgrade has been designed principally to avoid any negative impacts to the federally protected dwarf galaxias species through aligning the road north of the northern channel. Sixty metres of the northern channel will be infilled and replaced with an underground drainage pipe due to intersection requirements. The vegetation in this area is classified as degraded treeless vegetation which is not considered to provide the optimum habitat for the dwarf galaxias. A majority of the Swamp Scrub located adjacent to the northern drain is to be retained, but a small quantity of significant vegetation (0.13 habitat hectaresfrom an area of 0.66 hectares) will be removed as part of this project. To mitigate potential negative impacts that may occur to the dwarf galaxias as a result of the development a number of mitigation / management measures will be undertaken including:

• Increasing the connectivity with the southern channel via the construction of two weirs, • Enhancing dwarf galaxias habitat by improving fringing Swamp Scrub vegetation along the

northern and southern channels, and creating Swamp Scrub vegetation along the bunded buffer zone and adjacent to and through the two constructed weirs, through revegetation and weed control works;

• Enhancing the condition of Swamp Scrub vegetation by allowing the regeneration of this vegetation along the former road reserve; and

• Conducting regular dwarf galaxias surveys and water quality monitoring to ensure if any negative impacts occur, appropriate measures are undertaken as recommended.

The two documents that should be referenced in conjunction with this CMP are the Project Environment Management Plan (Meinhardt, 2011b) and the Dwarf Galaxias Environment Management Plan (John McGuckin, 2011). Additionally, further details regarding some specifics of management will be provided within a Construction Environmental Management Plan (CEMP), to be finalised upon the completion of contracts between the City of Casey and its awarded contractors. This CEMP will be subject to approval from the responsible authority (City of Casey) and the referral authorities: the Department of Sustainability and Environment (DSE) and the Department of Sustainability, Environment, Water, Population and Communities (SEWPAC).



10. REFERENCES ANZECC (Australian and New Zealand Environment Conservation Council), 2000. Australian Water Quality Guidelines for Fresh and Marine Waters. National Water Quality Management Strategy. Biosis Research, 2008. Aquatic Fauna Assessment of O’Grady Road, Hallam, Victoria. Prepared for the City of Casey. Biosis Research, 2009. Aquatic Fauna Assessment of O’Grady Road, Hallam, Victoria. Project no. 7959, prepared for the City of Casey. DSE (Department of Sustainability and Environment), 2007. EVC / Bioregion Benchmark for Vegetation Quality Assessment, Gippsland Plain Bioregion, EVC 53: Swamp Scrub. EPA (Environment Protection Authority Victoria), 1991. Construction Techniques for Sediment Pollution Control. EPA Publication 275. EPA, 1996. Environmental Guidelines for Major Construction Sites. EPA Publication 480. Meinhardt Infrastructure and Environment, 2011a. Flora, Fauna and Habitat Hectare Assessment – O’Grady Road, Hallam, Victoria. Prepared for the City of Casey. Meinhardt Infrastructure and Environment, 2011b. Project Environment Management Plan. Prepared for the City of Casey. McGuckin J., 2011. Dwarf Galaxias (Galaxiella pusilla) Environmental Management Plan – O’Grady Road, Hallam. Prepared by Streamline Research for Meinhardt Infrastructure and Environment Pty Ltd. SKM, 2006. O’Grady Road Environmental Assessment – Environmental Assessment of O’Grady Road Upgrade Options. Prepared for the City of Casey. SKM, 2008. O’Grady Road Environmental Assessment Addendum – Environmental Assessment of O’Grady Road Upgrade Option 3A. Prepared for the City of Casey. Wong, T., Breen, P., Lloyd, S., 2000, Water Sensitive Road Design – Design Options for Improving Stormwater Quality of Road Runoff. Cooperative Research Centre for Catchment Hydrology, Canberra.

APPENDIX A FIGURES

APPENDIX B ENGINEERING DRAWINGS (BIORETENTION SYSTEM AND WEIR DESIGN)

TYPICAL SECTIONS AND DETAILSSHEET 2 OF 3

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O'GRADY ROAD - CONSTRUCTION BETWEENSOUTH GIPPSLAND FWY TO HALLAM SOUTH RDCITY OF CASEY

TYPICAL BIORETENTION SWALE PLAN

BIORETENTION SWALE LONGITUDINAL SECTION

TYPICAL BIORETENTION SYSTEM SECTION

SECTIONNOT TO SCALE

SECTIONNOT TO SCALE

VARIES (MIN 1000mm)

TRANSITIONAL LAYER. FOR DETAILS REFER NOTES

DRAINAGE LAYER. FOR DETAILS REFER NOTES

100Ï SLOTTED / PERFORATED COLLECTOR PIPE(VINIDEX DRAINCOIL OR APPROVED EQUAL)MIN 1:100 GRADE. NO FILTER SOCK TO BE USED.

IMPERVIOUS FLEXIBLE MEMBRANE SHAPED IN THEBASE OF TRENCH TO DIRECT WATER TO COLLECTORPIPE

VARI

ES (1

600 M

IN)

KERB

PAVEMENT

600m

m MA

XVA

RIES

100Ï-250Ï NON-GRADEDNON-GROUTED ROCKS

BACK OF KERB

300 1000 300

KERB OPENING DETAIL

SECTIONNOT TO SCALE

LIP OF CHANNEL

100

150

100Ï PERFORATED COLLECTOR PIPE WITHINBIORETENTION ZONE

BIORETENTION SYSTEMFILTER MATERIALS. REFERNOTES AND SECTION 2

GRATED PIT COVER TO SITFLUSH WITH PIT FSL.

OBVERT OF COLLECTOR PIPE TO BE ATOBVERT OF OUTLET PIPE OR HIGHER

IL VARIES

BIORETENTION SYSTEM NOTES

F1. FILTER MEDIA MATERIAL TO BE SANDY LOAM, WITH HYDRAULIC CONDUCTIVITY OF100-200mm/HR. MATERIAL TO HAVE ORGANIC CONTENT OF 5-10% (IN ACCORDANCEWITH AS1289 4.1.1), BE FREE OF DEGRADABLE MATERIAL, WITH PH IN RANGE OF6.0-7.5. MATERIAL TO BE REJECTED IF SHOWN TO CONTAIN HIGH LEVELS OF SALT OREXTREMELY LOW LEVELS OF ORGANIC CARBON, WHICH MAY RETARD PLANTGROWTH.

F2. FILTER MEDIA TO HAVE FOLLOWING PARTICLE SIZE COMPOSITION:CLAY (<0.002mm) 5-15%SILT (0.002-0.05mm) <30%SAND (0.05-2mm) 50-70%

F3. TRANSITION LAYER TO BE COARSE SAND, PARTICLE SIZE (D50) 0.7-1.0mm, HYDRAULICCONDUCTIVITY OF 360-3600mm/HR. MATERIAL TO BE FREE OF DEGRADABLEMATERIAL.

F4. TRANSITION LAYER TO HAVE FOLLOWING TYPICAL COMPOSITION:SIEVE APERTURE (IN ACCORDANCE TO AS 1152) TO PERCENTAGE PASSING BY MASS:

1.4mm - 100%1.0mm - 80%0.7mm - 44%0.5mm - 8.4%

F5. DRAINAGE LAYER TO BE COARSE SAND/ GRAVEL, PARTICLE SIZE 2-5mm, HYDRAULICCONDUCTIVITY IN ORDER OF 3600mm/HR. MATERIAL TO BE FREE OF FINES ANDDEGRADABLE MATERIAL.

F6. BIORETENTION SYSTEM MATERIALS TO BE PLACED AND LIGHTLY COMPACTED TOAVOID SUBSISTENCE AND UNEVEN DRAINAGE. WATER IS TO INFILTRATE AND MOVEVERTICALLY THROUGH THE PROFILE. CONTRACTOR TO PROVIDE SAMPLELABORATORY GRADING AND PERMEABILITY TESTS OF PROPOSED MATERIALS.

F7. BIORETENTION SYSTEM SUBSURFACE DRAINS TO BE CLASS 400 OR ABOVE WITHAPPROVED GEOFABRIC FILTER WRAP CAPABLE OF RETAINING PARTICLES OF 0.25mmSIZE. FILTER WRAP TO BE SECURELY FITTED OR JOINED AT EACH JOINT BY TAPE OROTHER APPROVED MEANS.

F8. FLUSH OUT RISER OR SUBSURFACE PIT TO BE INSTALLED AT UPSTREAM END OFEACH BIORETENTION SYSTEM SUBSURFACE COLLECTOR PIPE.

F9. BIORETENTION SYSTEM SUBSURFACE COLLECTOR PIPES TO BE CONNECTED TOSTORMWATER DRAINAGE SYSTEM AS APPLICABLE.

F10. GEOMEMBRANES AND GEOTEXTILES TO BE PROTECTED FROM DAMAGE BYSUBSEQUENT OPERATIONS, INCLUDING BACKFILLING AND THE LIKE.

F11. REFER TO DRAWING MIE020 FOR GENERAL STORMWATER NOTES AND DETAILS.

SUITABLE BACKFILL MATERIAL TOSUPERINTENDENTS SATISFACTION

100mmÏ NON-PERFORATED FLUSHOUT RISER WITH SCREW END CAP

200

MIN.

FLUSH OUT RISER

MASS CONCRETE KERBOPENING

BIORETENTION ZONE 1600

12 (MAX) 20

0 1

2 (MAX)

12 (MAX)

(APP

ROX

300m

m)

12 (MAX)

VARIES (MIN 2200mm)

GRADE BACK OF KERB OUTLETDOWN AT 1 IN 2

OUTLET PIPE

IMPERVIOUS FLEXIBLE MEMBRANE

1600

NOT TO SCALE

NON-GROUTED ROCK LINING ANDPLANTING TYPE 2 ON BATTERS,

REFER PLANTING NOTES

PLANTING TYPE 1

ENSURE GUARD FENCEPOSTS ARE CLEAR OFKERB OPENING

COLLECTOR PIPE

100

ROCK TO BE PLACED AROUND AND LEVEL TOTOP OF GRATED PIT TO CONCEAL PIT WALLS 100Ï-250Ï NON-GRADED ROCKS

PLACED AND INTERLOCKED

NON-PERFORATEDPERFORATED

REFER PIT SCHEDULE ANDPLANS FOR PIT DETAILS

GEOTEXTILE FABRIC TOSEPARATE TRANSITION LAYERFROM DRAINAGE LAYER

FILTER MEDIA. FOR DETAILS REFER NOTES.

100

ROCK TO BE PLACED AROUND AND LEVEL TOTOP OF GRATED PIT TO CONCEAL PIT WALLS(BY LANDSCAPE CONTRACTOR)

PLANTING TYPE 1 (REFER NOTES)

NON-GROUTED ROCK LINING ANDPLANTING TYPE 2 ON BATTERS.


NON-GROUTED ROCK LINING ANDPLANTING TYPE 2 ON BATTERS.


NON-GROUTED ROCK LINING AND PLANTINGTYPE 2 ON BATTERS. REFER PLANTING NOTES

PLANTING TYPE 1 (REFER NOTES)

CONSTRUCTION OF WORKS:

C1. ALL BIORETENTION SWALE WORKS ARE TO BE UNDERTAKEN BY THE CIVILCONTRACTOR INCLUDING ROCK LINING AND PLANTING AS NOTED ON THE DRAWINGS.

C2. DURING AND FOLLOWING COMPLETION OF THE BIORETENTION SWALE THECONTRACTOR SHALL AT ALL TIMES ENSURE NECESSARY PROTECTION TO THESWALE TO PREVENT THE INGRESS OF SILT AND CLOGGING OF BIOFILTER MEDIA.

C3. THE CONTRACTOR SHALL FLUSH OUT ALL PITS AND PIPE (INCLUDING AG DRAINS)FOR INSPECTION AND ENSURE THE BIOFILTER MEDIA IS FREE OF SILT PRIOR TO THEISSUE OF PRACTICAL COMPLETION.

C4. THE CONTRACTOR SHALL ESTABLISH AND MAINTAIN PLANTS DURING ANDFOLLOWING THE WORKS, UNTIL THE END OF THE DEFECTS LIABILITY PERIOD FORSOFT LANDSCAPE WORKS.

2-

2

1

3-

3-

GUARDRAIL

CITY OF CASEY

-

-

SILT TRAP

UNLINED ON SOUTH SIDE

PLANTING NOTES

P1. THE FOLLOWING SPECIES ARE TO BE PLANTED, ESTABLISHED AND MAINTAINED BYTHE CONTRACTOR FOR THE DURATION OF THE WORKS AND DEFECTS LIABILITYPERIOD:

TYPE 1: CAREX APPRESSA, DENSITY 4-8 (AVG. 6) PLANTS PER SQUARE METRE

TYPE 2: CAREX INVERSA, DENSITY 4-6 (AVG. 5) PLANTS PER SQUARE METRE INTERSPERSED WITH NON-GROUTED ROCK.

TRAFFIC LANE

PARKING LANE

TRAFFIC LANE

NATURE STRIP

FOOTPATH

O'GRADY ROAD NORTHERN TABLE DRAIN

1 IN 3FALL

1 IN 10FALL

IL 13.30

IL 13.30

7 X 3 NO. OF 2.4m X 1.8mPRECAST CROWN UNITS

E346516.076N5790832.010

PRECAST CONCRETE WING WALLS.CONSTRUCTED/INSTALLED TO

MANUFACTURERS SPECIFICATIONS

CL

ROAD RESERVE BOUNDARY

BOX CULVERTS TO BE INSTALLED TO MANUFACTURERS SPECIFICATIONSON IN-SITU BASE SLAB. REFER MIE603 FOR DETAILS

E346520.005N5790848.867

SHAPE BATTER TO EXISTINGMAX. SLOPE OF 1 IN 2

ALIGN BED OF CHANNEL TOUPSTREAM HEADWALL

MATCH INTO EXISTINGALIGNMENT AND WIDTH

OVERFLOW WEIR CUT INTOEXISTING O'GRADY ROAD

ROCK BEACHING TOMWC REQUIREMENTS

SHAPE BATTER SLOPE TOEXISTING. MAX. SLOPE 1 IN 2

PRECAST CONCRETE WING WALLS.CONSTRUCTED/INSTALLED TOMANUFACTURERS SPECIFICATIONS

CL

POST & RAIL SAFETY BARRIER AROUND DROPZONES. FOR DETAILS REFER MELBOURNEWATER STANDARD DRAWING No. 7251/8/206

INDICATIVE EXTENT OF TABLE DRAIN AS NOTEDON DANDENONG VALLEY AUTHORITY DRAWING0602/13/ 2 PROVIDED BY MELBOURNE WATER

INDICATIVE TOE OF SWALE AS NOTED ON DANDENONGVALLEY AUTHORITY DRAWING 0602/13/ 2 PROVIDED BYMELBOURNE WATER. TOE OF SWALE TO BE CONFIRMEDON-SITE PRIOR TO CULVERT INSTALLATION

Ch 120.000 Ch 140.000 Ch 160.000 Ch 180.000

MELBOURNE WATERACCESS TRACK

ALL DISTURBED AREAS TO BE REVEGETATED WITHLOCAL PROVENANCE INDIGENOUS SPECIES

APPROPRIATE TO THE SITE'S SWAMP SCRUB EVC.REFER CITY OF CASEY LANDSCAPE APPROVALS

OFFICER FOR FURTHER DETAILS.

ALL DISTURBED AREAS TO BE REVEGETATEDWITH SPECIES APPROVED BY CITY OF CASEY

LANDSCAPE APPROVALS OFFICER.

O'GRADY ROAD

ROCK BEACHING TO MWC REQUIREMENTS

REFER DETAIL B

WARNINGBEWARE OF UNDERGROUND SERVICES

THE LOCATIONS OF UNDERGROUND SERVICES AREAPPROXIMATE ONLY AND THEIR EXACT POSITIONSHOULD BE PROVEN ON SITE. NO GUARANTEE IS

GIVEN THAT ALL EXISTING SERVICES ARE SHOWN.

WARNINGPROPOSED SERVICES

THE LOCATION AND EXTENT OF PROPOSED SERVICES ISINDICATIVE ONLY AND ARE NOT TO BE USED FOR

CONSTRUCTION. REFER TO AUTHORISEDDOCUMENTATION BY RELEVANT AUTHORITY FOR

CONSTRUCTION DETAILS

CITY OF CASEY

TRAFFIC LANE

PARKING LANE

TRAFFIC LANE

NATURE STRIP

FOOTPATH

O'GRADY ROAD NORTHERN TABLE DRAIN

20.00m

OVERFLOW WEIR CUT INTOEXISTING O'GRADY ROAD

1 IN 10FALL

1 IN 10FALL

IL 14.23

IL 14.23

ROCK BEACHING TOMWC REQUIREMENT

SHAPE BATTER SLOPE TOEXISTING. MAX. SLOPE 1 IN 2

7 X 2 NO. OF 2.4m X 1.8mPRECAST CROWN UNITS

E347491.449N5790673.127

PRECAST CONCRETE WINGWALLSCONSTRUCTED/INSTALLED TO

MANUFACTURERS INSTRUCTIONS

CL

ROAD RESERVE BOUNDARY

BOX CULVERTS TO BE INSTALLED TO MANUFACTURERS SPECIFICATIONSON IN-SITU BASE SLAB. REFER MIE601 FOR DETAILS

E347493.729N5790690.288

SHAPE BATTER TO EXISTINGMAX. SLOPE OF 1 IN 2

ALIGN BED OF CHANNEL TOUPSTREAM HEADWALL

MATCH INTO EXISTINGALIGNMENT AND WIDTH

POST & RAIL SAFETY BARRIER AROUND DROPZONES. FOR DETAILS REFER MELBOURNEWATER STANDARD DRAWING No. 7251/8/206

Ch 1140.000

Ch 1160.000

Ch 1180.000

Ch 1200.000

INDICATIVE EXTENT OF TABLE DRAIN AS NOTEDON DANDENONG VALLEY AUTHORITY DRAWING0602/13/ 2 PROVIDED BY MELBOURNE WATER

INDICATIVE WATER LEVEL AS NOTED BY THE SURVEYOR

INDICATIVE TOE OF SWALE AS NOTED ON DANDENONGVALLEY AUTHORITY DRAWING 0602/13/ 2 PROVIDED BYMELBOURNE WATER. TOE OF SWALE TO BE CONFIRMEDON-SITE PRIOR TO CULVERT INSTALLATION

O'GRADY ROAD

ROCK BEACHING TO MWC REQUIREMENTS

PRECAST CONCRETE WINGWALLSCONSTRUCTED/INSTALLED TO

MANUFACTURERS INSTRUCTIONS

ALL DISTURBED AREAS TO BE REVEGETATEDWITH LOCAL PROVENANCE INDIGENOUS SPECIESAPPROPRIATE TO THE SITE'S SWAMP SCRUB EVC.

REFER CITY OF CASEY LANDSCAPE APPROVALSOFFICER FOR FURTHER DETAILS.

ALL DISTURBED AREAS TO BE REVEGETATEDWITH SPECIES APPROVED BY CITY OF CASEY

LANDSCAPE APPROVALS OFFICER.

REFER DETAIL B






CONSTRUCTION. REFER TO AUTHORISEDDOCUMENTATION BY RELEVANT AUTHORITY FOR

CONSTRUCTION DETAILS

CITY OF CASEY

APPENDIX C VEGETATION AND NO-GO ZONE PLANS

LOTS 104-112

LOTS 114-122

LOT 124

MELBOURNE WATER RESERVE

SOUT

H G

IPPS

LAND

HIG

HWAY

EXISTING UNSEALED O'GRADY ROAD

ACCESS POINT

ENVIRONMENTAL MANAGEMENT PLANSHEET 1 OF 5

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EXISTING WATER

EXISTING TELSTRA

EXISTING GAS

EXISTING ELECTRICITY (OVERHEAD)

ROADWORKS LEGEND

EXISTING DRAINAGE

DEGRADED TREELESS VEGETATION

SWAMP SCRUB

SWAMP SCRUB TO REMOVE

DEGRADED TREELESS VEGETATIONTO REMOVE

"NO-GO" ZONE FENCE

"NO-GO" ZONE


LOTS 104-112

LOTS 78-86

LOTS 88-102


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EXISTING WATER

EXISTING TELSTRA

EXISTING GAS


ROADWORKS LEGEND

EXISTING DRAINAGE


SWAMP SCRUB



"NO-GO" ZONE FENCE

"NO-GO" ZONE

LOTS 52-66

LOTS 68-72




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CITY OF CASEY

EXISTING SEWER

EXISTING WATER

EXISTING TELSTRA

EXISTING GAS


ROADWORKS LEGEND

EXISTING DRAINAGE


SWAMP SCRUB



"NO-GO" ZONE FENCE

"NO-GO" ZONE

LOTS 24-36

LOTS 38-50



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REF

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G MI

E_EM

P3

CITY OF CASEY

EXISTING SEWER

EXISTING WATER

EXISTING TELSTRA

EXISTING GAS


ROADWORKS LEGEND

EXISTING DRAINAGE


SWAMP SCRUB



"NO-GO" ZONE FENCE

"NO-GO" ZONE

LOT 99


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EXISTING WATER

EXISTING TELSTRA

EXISTING GAS


ROADWORKS LEGEND

EXISTING DRAINAGE


SWAMP SCRUB



"NO-GO" ZONE FENCE

"NO-GO" ZONE

APPENDIX D EVC / BIOREGION BENCHMARK

Ecological Vegetation Class bioregion benchmark

EVC/Bioregion Benchmark for Vegetation Quality Assessment

Gippsland Plain bioregion

EVC 53: Swamp Scrub

Description: Closed scrub to 8 m tall at low elevations on alluvial deposits along streams or on poorly drained sites with higher nutrient availability. The EVC is dominated by Swamp Paperbark Melaleuca ericifolia (or sometimes Woolly Tea-tree Leptospermum lanigerum) which often forms a dense thicket, out-competing other species. Occasional emergent eucalypts may be present. Where light penetrates to ground level, a moss/lichen/liverwort or herbaceous ground cover is often present. Dry variants have a grassy/herbaceous ground layer.

Canopy Cover:

%cover Character Species Common Name 50% Leptospermum lanigerum Woolly Tea-tree Melaleuca ericifolia Swamp Paperbark

Understorey: Life form #Spp %Cover LF code Medium Shrub 2 10% MS Small Shrub 2 1% SS Large Herb 2 5% LH Medium Herb 3 15% MH Small or Prostrate Herb 2 5% SH Large Tufted Graminoid 2 10% LTG Large Non-tufted Graminoid 3 10% LNG Medium to Small Tufted Graminoid 2 5% MTG Medium to Tiny Non-tufted Graminoid 2 15% MNG Ground Fern 1 5% GF Scrambler or Climber 1 1% SC Bryophytes/Lichens na 20% BL

LF Code Species typical of at least part of EVC range Common Name

MS Coprosma quadrifida Prickly Currant-bush MS Leptospermum continentale Prickly Tea-tree LH Lycopus australis Australian Gipsywort LH Lythrum salicaria Purple Loosestrife LH Persicaria praetermissa Spotted Knotweed MH Hydrocotyle pterocarpa Wing Pennywort MH Stellaria angustifolia Swamp Starwort MH Lobelia anceps Angled Lobelia SH Crassula helmsii Swamp Crassula LTG Juncus procerus Tall Rush LTG Poa labillardierei Common Tussock-grass LNG Gahnia radula Thatch Saw-sedge LNG Phragmites australis Common Reed LNG Baumea rubiginosa s.l. Soft Twig-rush MTG Triglochin procerum s.l. Water Ribbons MTG Juncus gregiflorus Green Rush MNG Eleocharis acuta Common Spike-sedge GF Blechnum cartilagineum Gristle Fern SC Calystegia sepium Large Bindweed

Published by the Victorian Government Department of Sustainability and Environment November 2007

© The State of Victoria Department of Sustainability and Environment 2007

This publication is copyright. Reproduction and the making available of this material for personal, in-house or non-commercial purposes is authorised, on condition that: • the copyright owner is acknowledged;

• no official connection is claimed; • the material is made available without charge or at cost; and

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www.dse.vic.gov.au

EVC 53: Swamp Scrub - Gippsland Plain bioregion

Recruitment: Continuous

Organic Litter: 40 % cover

Weediness:

LF Code Typical Weed Species Common Name Invasive Impact MH Hypochoeris radicata Cat's Ear high low LNG Holcus lanatus Yorkshire Fog high high

EPBC 2011/5912 - Environment

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