Surface Water Existing Conditions Report

Bunyip North Quarry Hanson Construction Materials Pty Ltd 26-Nov-2019 D R A F T

Bunyip North Quarry

Revision 0 – 26-Nov-2019 Prepared for – Hanson Construction Materials Pty Ltd – ABN: 90 009 679 734 AECOM Bunyip North Quarry Surface Water Existing Conditions Report

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Surface Water Existing Conditions Report Bunyip North Quarry

Client: Hanson Construction Materials Pty Ltd

ABN: 90 009 679 734

Prepared by

AECOM Australia Pty Ltd Level 10, Tower Two, 727 Collins Street, Melbourne VIC 3008, Australia T +61 3 9653 1234 F +61 3 9654 7117 www.aecom.com ABN 20 093 846 925

26-Nov-2019

Job No.: 60537505

AECOM in Australia and New Zealand is certified to ISO9001, ISO14001 AS/NZS4801 and OHSAS18001.

AECOM has prepared this document for the sole use of the Client and for a specific purpose, each as expressly stated in the document. No other party should rely on this document without the prior written consent of AECOM. AECOM undertakes no duty, nor accepts any responsibility, to any third party who may rely upon or use this document. This document has been prepared based on the Client’s description of its requirements and AECOM’s experience, having regard to assumptions that AECOM can reasonably be expected to make in accordance with sound professional principles. AECOM may also have relied upon information provided by the Client and other third parties to prepare this document, some of which may not have been verified. Subject to the above conditions, this document may be transmitted, reproduced or disseminated only in its entirety.

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Quality Information

Document Surface Water Existing Conditions Report

Ref 60537505

Date 26-Nov-2019

Prepared by Peter Meyers

Reviewed by Bryan Chadwick

Revision History

Authorised Rev Revision Date Details Name/Position Signature

0 26-Nov-2019 Draft Bryan Chadwick Technical Director - Environment

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Table of Contents 1.0 Introduction 7 1.1 Purpose 7 1.2 Project Description 7 1.2.1 Location 7 1.2.2 Project Outline 7 1.2.3 Proposed Pit 8 1.2.4 Closure 8 2.0 EES Scoping Requirements 10 2.1 Evaluation Objective 10 2.2 Scoping Requirements 10 3.0 Legislation, Policy and Guidelines 12 3.1 Relevant legislation 12 3.1.1 Water Act 1989 12 3.1.2 Environment Protection Act 1970 12 3.1.3 State Environment Protection Policy (Waters) 2018 13 4.0 Scope and Methodology 16 4.1 Existing Conditions Assessment 16 4.1.1 Desktop Assessment 16 4.1.2 Surface Water Monitoring 16 4.1.3 Hydrological Modelling 16 4.2 Linkage to other technical reports 17 5.0 Existing Conditions 18 5.1 Regional Hydrological Setting 18 5.2 Topography 19 5.3 Climate 19 5.4 Water Quality 19 5.5 Surface Water description 20 5.5.1 Cannibal Creek 21 5.5.2 Two Mile Creek West 21 5.5.3 No Name Creek 22 5.6 Waterway flow Characteristics 22 5.6.1 Two Mile Creek West 23 5.6.2 Cannibal Creek 24 5.6.3 No Name Creek 25 5.7 Surface Water Users 25 5.8 Property Inspections 25 6.0 References 26 7.0 Limitations 27 Appendix A Figures A Appendix B Farm Dams B Appendix C Field Measurements C Appendix D Property Inspections D

List of Tables Table 1 Cumulative planned annual production rate 8 Table 2 Scoping requirements (Water) 10 Table 3 Primary environmental legislation and associated information on groundwater 12

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Table 4 Adopted surface water beneficial use guidelines 14 Table 5 Publicly available data sources 16

List of Figures Figure 1 Cumulative staged volume remove estimate (overburden, road base and aggregates) 8 Figure 2 Bunyip River Basin Extent (BOM surface water catchments) 18 Figure 3 Mean monthly rainfall and pan evaporation 19 Figure 4 Water quality indicators for Bunyip River 20 Figure 5 Two Mile Creek West 21 Figure 6 Pond along No Name Creek 22 Figure 7 Two Mile Creek Daily Flow Rate 23 Figure 8 Two Mile Creek Daily Flow Volume Percentile 24 Figure 9 Cannibal Creek Daily Flow Rate 24 Figure 10 Cannibal Creek Daily Flow Volume Percentile 25

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Abbreviations

List of Abbreviations AECOM AECOM Australia Pty Ltd AEP Annual Exceedance Probability AHD Australian Height Datum BOM Bureau of Meteorology DJRP Department of Jobs, Regions and Precincts DELWP Department of Environment, Land, Water and Planning Hanson Hanson Construction Materials Pty Ltd MW Melbourne Water RL Reduced level SRW Southern Rural Water

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1.0 Introduction This report presents the surface water conditions relevant to the construction, operation and closure of the proposed Bunyip North Quarry Project (herein referred to as ‘the project’). Hanson Construction Materials Pty Ltd (Hanson) propose to establish a hard rock quarry and processing facility at Bunyip North. The Project will supply road base and aggerates for industrial, commercial and residential use meeting a projected regional shortfall and improving resource supply certainty. The Project was referred by Hanson to the Victorian Government under the Environment Effects Act 1978 (EE Act) on 5 October 2015. On 22 November 2015, the Minister for Planning issued a decision determining that an Environment Effects Statement (EES) is required for the full Project due to the potential for a range of significant environmental effects. The Project also referred to the Commonwealth Government under the Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act) and was designated as a controlled action requiring impact assessment under the EPBC Act. The EES process is acting as the accredited environmental assessment for the controlled action decisions under the EPBC Act in accordance with the bilateral agreement between the Commonwealth and Victoria.

1.1 Purpose

Why understanding surface water is important The hydrological flow and water quality are important to the health and sustainability of natural creeks waterways and floodplains in the vicinity of the project. Construction of the Project includes a single pit and overburden stockpiles, which will alter surface water flow characteristics and potentially impact water quality within waterways and receiving waters. Understanding the condition of existing waterways and the environmental values that require protection enables methods to be developed to minimise or prevent impacts to the regional and local waterways.

1.2 Project Description 1.2.1 Location The proposed quarry location (the Site) is located on Sanders Road, Bunyip North, approximately 70 km east-southeast of Melbourne CBD. The site is undeveloped greenfield site, currently cleared and used for livestock grazing. The Site encompasses an approximate area of 156 ha. The site is located within the parish of Bunyip, in the Shire of Cardinia. Nearby townships are Tynong, Garfield and Bunyip. The Site is presented in Figure A1 (Appendix A) with respect to relevant regional features. 1.2.2 Project Outline Hanson plan to develop a hard rock quarry and processing plant at the Site. The proposed Work Authority boundary and footprint of key project elements are presented on Figure A3 (Appendix A). Planned operations: Approximately 130 million tonnes (Mt) of road base and aggregate granite reserve has been estimated at the site. Overburden will be removed using earth moving plant (excavators and dump trucks) and placed in on-site overburden stockpiles. Quarried rock will be blasted and removed using front end loaders and dump trucks. Secondary breakage will be completed by using excavators to hammer the material apart. Planned production schedule is as follows. • Years 1 to 5 (Stage 1A) : 0.5 M tonnes per annum; • Years 6 onwards (Stage 1B to Stage 5): Up to 2.0 M tonnes per annum (as market demands).

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Cumulative stage production rates are listed in Table 1. Table 1 Cumulative planned annual production rate

Stage 1 (1A + 1B) 2 3 4

Road Base (Mt) 1.8 2.7 4.2 9.9 Aggregate (Mt) 6.5 9.8 20 119.5 Total (Mt/annum) 8.3 12.5 24.2 129.4 Expected year of Stage 8 10 16 69 completion

The estimated cumulative volume of material removed for each stage is shown in Figure 1. Figure 1 Cumulative staged volume remove estimate (overburden, road base and aggregates)

Processing On site processing will likely consist of primary, secondary and tertiary crushing following a final screening process. Product will be stored on-site as stockpiles. No washing is planned. 1.2.3 Proposed Pit The current proposed quarry design (Version 6, Groundwork Plus, February 2019) has undergone numerous iterations. The final quarry design assumed herein includes the following key elements relevant to this impact assessment: • 100 m buffer from pit crest and OB stockpile to proposed WA boundary; • A pit bench profile of 15 m wide berms and 15 m faces (North, South and East faces); • Overburden dump stockpiles will be located within the southwest portion of the site; and • Final (Stage 4) pit floor level is 0 m AHD. The proposed Stage 4 pit and overburden design is provided in Figure 03 in Appendix A. 1.2.4 Closure At the end of Stage 4, the intended base of the pit will be at an elevation of 0 m AHD. The final pit area will be approximately 70 ha and the final overburden footprint will be around 28 ha.

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Precipitation, groundwater inflows and some surface water flows are expected to result in a lake forming in the base of the pit.

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2.0 EES Scoping Requirements The Ministers decision to require an EES includes the following key (relevant) matters (among others) that an EES should consider: “…b. potential effects on surface and groundwater environments and related beneficial uses, included as a results of changes to groundwater levels, movement, affected stream flows and discharges…” This report intends to respond to (but is not limited to) the Scoping Requirements of the EES for assessing the specific surface water relevant environmental effects. The key issues, priorities and assessment requirements containing element relevant to surface water outlined in Section 4 of the Scoping Requirement guidance document are described in this chapter.

2.1 Evaluation Objective Broadly, the aim of the EES is to appropriately characterise the existing conditions of the surface water and groundwater resources and their beneficial and licensed uses, including downstream environmental values (including habitat for Matters of National Environmental Significance), such that it is possible to assess the impacts over the short and long term.

2.2 Scoping Requirements The following extracts from the Scoping Requirements, issues by the Minister for Planning, are relevant to the definition of the existing conditions. Table 2 Scoping requirements (Water)

Aspect Scoping Requirement Refer Key issues Potential impacts on beneficial uses and behaviour Section Error! Reference of groundwater, due to interception of flows or source not found. groundwater drawdown, in the context of the (impact assessment). proposed depth, volume and duration of extraction. EES Technical Report xx: Potential impacts on downstream environmental Groundwater impact values, including habitat for MNES downstream of assessment the project site, in the context of the likely duration EES Technical Report xx: of the project. Terrestrial biodiversity Potential impacts on beneficial uses of surface impact assessment water environments downstream of the project site EES Technical Report xx: arising from interception or redirection of flows or Aquatic biodiversity impact from polluted run-off from operational areas or assessment other areas disturbed by project works, in the context of projected climate change over the anticipated duration of the project.

Priorities for Describe the existing groundwater environment on Section 5.0 (Existing characterisation and in the vicinity of the project site, with regard to Conditions)) available database information and project-specific data collection, and with regard to the protected EES Technical Report xx: beneficial uses, values and behaviour of Groundwater impact groundwater. assessment Identify and characterise any groundwater dependent ecosystems that may be affected by the quarry dewatering or resultant drawdown of groundwater. Describe the local and downstream surface water environment, in the context of the catchments within which the project site is located, with respect

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Aspect Scoping Requirement Refer to water quality and hydrology and environmental values and other beneficial uses relying on surface water Characterise the interaction between surface water and groundwater within the project site and in the broader area, including that required for maintenance of habitat for reliant MNES. Provide a sufficient hydrogeological characterisation (e.g. a model) for the site and its environs, including the current allocations, extractions and uses of groundwater or surface water in the area.

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3.0 Legislation, Policy and Guidelines

3.1 Relevant legislation Table 3 summarises the relevant legislation that applies to the project in the context of this surface water impact assessment as well as the implications and required approvals. Table 3 Primary environmental legislation and associated information on groundwater Legislation/ Key policies/strategies policy Water Act 1989 This Act is the primary legislation for the integrated management of Victoria’s water resources. The Act applies to the management of surface water.

Environment The Act regulates the discharge of surface water or groundwater by a system Protection Act of licences and works approvals. 1970.

State Environment SEPPs are subordinate legislation made under the Environment Protection Act Protection Policy 1970. SEPPs aim to safeguard environmental values and human activities (i.e. (Waters) beneficial uses) and define the quality of the environment required to protect them. SEPP (Waters) provides a framework for the protection and management of water quality in Victoria, covering surface waters, estuarine and marine waters and groundwater across the State.

Victorian The Victorian Waterway Management Strategy provides the policy direction for Waterway managing Victoria’s Waterways over an 8-year period. It requires the Management development and implementation of regional waterway strategies for 10 Strategy (2013) catchment management regions across Victoria.

Healthy The Healthy Waterways Strategy documents a 50-year vision for the Port Waterways Phillip and Westernport region. It identifies high value waterways and priority Strategy (2018) management activities over a 10-year period with objectives to guide activities and indicate progress toward improving the waterway condition

3.1.1 Water Act 1989 The Water Act 1989 provides the legal framework for managing Victoria’s water resources. The intention of the act is to promote equitable and efficient use of water resources, whilst ensuring the conservation and appropriate management of the resource. 3.1.2 Environment Protection Act 1970 The Environment Protection Act 1970 empowers the Environment Protection Authority (EPA Victoria) to implement regulations and maintain the state environment policies and protect the environment from pollution and the management of wastes. The Act regulates the discharge or emission of waste to water, land or air by a system of works approvals and licences. It has the objectives of preventing and managing pollution and environmental damage, and the setting of environmental quality goals and programs. A number of subordinate legislation and guidelines exist which further expand upon the general tenets of the Water Act 1989 and Environment Protection Act 1970. State Environment Protection Policies (SEPPs) set out policies of the Victorian Government to control and reduce environmental pollution and have been formulated for discharges to atmosphere, water, land and noise emissions. They protect the environment and human activities (referred to as beneficial uses) from the pollution caused by waste discharges and noise and are subordinate documents to the Environment Protection Act 1970.

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It is noted that a new legal framework will come into effect on 1 July 2020: Environment Protect Amendment Act 2018, which aims to drive environmental improvements. 3.1.3 State Environment Protection Policy (Waters) 2018 The aim of the State Environmental Protection Policy (SEPP) (Waters) (2018) is to protect human health and the environment by reducing the harmful effects of pollution and waste, and to contribute to the restoration and protection of the ecological integrity of Victorian waters. The SEPP governs the framework for protection and rehabilitation of both surface and groundwater environments and aims to protect and maintain the level of environmental quality required to sustain the beneficial uses of Victoria’s water environments. The beneficial uses of groundwater and surface water are classified under variations segments defined in the SEPP. As defined by Schedule 2 of the SEPP, the beneficial uses for inland water are defined as: • Water dependent ecosystems and species; • Human consumption after appropriate treatment; • Agriculture and irrigation; • Human consumption of aquatic foods; • Aquaculture; • Industrial and commercial use; • Water-based recreation; • Traditional owner cultural values; • Cultural and spiritual values; and • Navigation and shipping. The SEPP Waters sets the framework for the protection and rehabilitation of Victoria’s surface water environments and the social and economic values which they support. This goal is implemented through the identification and protection of beneficial uses determined via the location of a study area and the level of disturbance within a catchment. The aim of SEPP is to maintain surface water quality sufficient to protect existing and potential beneficial uses of surface waters throughout Victoria. Within the following artificial assets, beneficial uses do not need to be protected: • Irrigation channels and drains; • Stormwater drains • Wetlands; • Landfill cells; and • Any other artificial asset that has been constructed for a specific purpose. Given the anticipated need to discharge from site, a beneficial use assessment would be applied from the point of discharge. Under the SEPP Waters, the location of the proposed quarry is covered by the Central Foothills and Coastal Plains surface water segment. Rivers and streams of the central foothills are defined as generally being above 200 m in altitude, with coastal plains below 200 m in altitude. The lowlands of the Bunyip River basin (and subsequently the project area and surface water down steam of the project area) are classified under this segment.1 This comprises the river and stream reaches. The beneficial uses that require protection within this segment of the environment are: • Water dependent ecosystems and species that are slightly to moderately modified;

1 River and stream reaches of the Bunyip River basin above 400 in altitude are classified under the Uplands A Segment.

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• Human consumption (where relevant); • Agriculture and irrigation; • Human consumption of aquatic foods; • Aquaculture (where relevant); • Industrial and commercial; • Water-based recreation (primary contact); • Water-based recreation (secondary contact); • Water-based recreation (aesthetic enjoyment); • Tradition Owner cultural values; and • Cultural and spiritual values. The SEPP Waters Schedule 3 sets out the environmental quality indicators and objectives and references the ANZECC guidelines (revised to ANZG in 2018) for assessment of surface water quality where Environmental Quality Objectives are not provided in the SEPP. The SEPP notes that where background water quality does not meet the policy objectives, then the background quality becomes the objective. A discussion of the nominated criteria for each beneficial use to be protected and their applicability is provided in Error! Reference source not found. Table 4 Adopted surface water beneficial use guidelines

Beneficial Adopted Comment Use Guideline Protection of Cannibal Creek (to the south) and Two-Mile Creek (to the south) which flow into Bunyip River, east of the site Environmental quality indicators and objectives are defined in Maintenance SEPP Waters SEPP (2018) for Central Foothills and Coastal Plains in Table 1 of of 2018, 2003 Schedule 3. Ecosystems ANZG, 2018 Where specific criteria are not defined in Table 1 of Schedule 3, the criteria for Freshwater Ecosystem Protection – slightly to moderately modified (95% protection): ANZG (2018) Toxicant Default Guideline Values for Freshwater is to be applied.

The beneficial use is currently considered unlikely. NHMRC, 2011, Water from the Bunyip River is not sourced for any public water Human updated supplies. Land owners in the region generally have rain water consumption November tanks associated with their properties, where town water supply is 2016 not connected.

Primary contact Two Mile Creek is ephemeral in nature and it is unlikely that the recreation water in the creeks, when they do flow, is used for recreational NMHRC 2008 purposes. Managing Secondary Cannibal Creek is shallow and does not appear to have any major Risks in contact forming pools downstream of the site. Primary and Secondary recreation Recreation contact recreation values are not expected to be realised until Water water reaches the Western Port Bay approximately 33 km Aesthetic downstream of the Cannibal Creek / Bunyip River confluence. Enjoyment

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Beneficial Adopted Comment Use Guideline

Traditional For recreation and aesthetics, the ANZG 2018 revers to ANZECC Owner 2000 guidelines. cultural Subsequently NHMRC developed the Guidelines for Managing values Risks in Recreational Water 2008 (NHMRC 2008). This document references the NHMRC (2004) Australian Drinking Water Guidelines (ADWG, now 2011 as a guide. NHMRC 2008 states Cultural and that to account for percentage of daily intake from recreational Spiritual waters, the drinking water guidelines provided can be modified by values a factor of 10 to 20 to provide screening levels for chemicals. Therefore, the objectives and approach presented in NHMRC 2008, should be adopted.

In the upland areas of the Western Port catchment, cattle farming is the dominant farming land use. Further downstream the area is Agriculture ANZECC, 2000 also widely used for crops such as asparagus and potato. The Irrigation of Irrigation- Long beneficial use is considered relevant. crop and pastures Term Values Primary industry guidelines (irrigation) continue to be covered by ANZECC 2000.

In the upland areas of the Western Port catchment, cattle farming is the dominant farming land use. Further downstream the area is also widely used for crops such as asparagus and potato. Agriculture Stock ANZG, 2018 The ANZECC 2018 Guidelines trigger values for livestock watering watering. Where no value is provided, it is acceptable (but conservative) to apply human drinking water guidelines per ADWG 2011.

Downstream of the site, water is not anticipated to be used for aquaculture. Fish consumption Recreational fishing may be possible along cannibal creek and – recreation ANZG, 2018 parts of the Bunyip River. The ANZECC 2018 Guidelines trigger or values for livestock watering. Where no value is provided, it is commercial acceptable (but conservative) to apply human drinking water guidelines per ADWG 2011.

Industrial and The ANZG 2018 Revers other sources of water quality guidance to ANZG, 2018 commercial a number of other relevant guidelines.

3.1.3.1 SEPP Requirements The site is located within the Central Foothills and Coastal Lowlands Surface Water Segment. Schedule 4 of the SEPP Waters sets out annual pollutant load targets specific to Western Port (among other areas), as a means to drive management interventions and investment in order to reduce pollution. The following criteria has been established to protect the beneficial uses of the Western Port (the ultimate downstream receiving environment) from the quarry for the period 2018 to 2028: • Average annual load of total suspended solids entering Western Port from the catchment and coast must not exceed 28,000 tonnes; and • There must be a 15% decrease in the total suspended sediment concentration in the east arm segment from an annual mean of 40 mg/L to an annual mean of 34 mg/L by 2028.

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4.0 Scope and Methodology This section describes the scope of the work undertaken and the methodology adopted for the purpose the characterising the existing surface water environment.

4.1 Existing Conditions Assessment The purpose of defining existing conditions is to inform the assessment of potential surface water impacts from the project. The existing conditions are described using both publicly available data. No project specific continuous surface water flow gauging was undertaken in either of the adjacent Cannibal Creek and Two-Mile Creek West, for the following reasons: • Seasonal variation of vegetation in Cannibal Creek would result in varying flow estimates due to higher water levels in the creek caused by increased vegetation. This would result in a highly inaccurate measurement. • Ephemeral nature of Two-Mile Creek West and indication that the catchment was largely responsive to rainfall events and changes in flows could be assessed using a hydrologic model. 4.1.1 Desktop Assessment The publicly available data sources used in the preparation of this report are summarised in Table 5. Table 5 Publicly available data sources

Data Source

Hydrology Melbourne Water: https://www.melbournewater.com.au/water/health-and-monitoring/river-health- and-monitoring/westernport-catchment Hydrology Assessment prepared by AECOM (2019)

Water Quality Yarra and Bay Westernport Catchment https://yarraandbay.vic.gov.au/report-card/western-port-catchment- sites/WPBUN0720#top_of_report

Surface Water Supplied by Southern Rural Water as an excel format. Users

Climate Bureau of Meteorology (BoM) http://www.bom.gov.au/climate/data/ Climate Data Online

4.1.2 Surface Water Monitoring Surface water creek flows were measured using a FLOWATCH Flowmeter, which records a minimum flow of 0.3m/s with a 0.1m/s resolution (accuracy +/- 3%). Flows were measured in July and September 2018 and observed in December 2017, November 2018 and June 2019. Field parameters were collected from a number of on-site and adjacent property dams, as well as Cannibal Creek, Two Mile Creek West and No Name Creek in February, March, July, September 2018 and June 2019. Surface water field measurements are provided in Appendix D. 4.1.3 Hydrological Modelling Existing hydrological conditions of the catchment have been defined by publicly available data and the development of a hydrological model to establish existing flow characteristics in local waterways that may be impacted by the Project.

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Data obtained from the Bureau of Meteorology, Southern Rural Water and the Victorian Government Spatial Datamart were used to determine design parameters and catchment conditions and included: • Climate data; • Topographical information; • Regional waterway and hydrological value; and • Beneficial users. A local hydrological rainfall runoff model was developed using modelling software MUSIC to represent daily volumetric flows in Two-Mile Creek West and Cannibal Creeks based on historical rainfall and was routed using translation to make an allowance for flow attenuation. The model provided a baseline assessment to characterise existing flow conditions in the two creeks. Flow conditions assessed included: • Maximum average daily flow rate; • Daily flow volume; and • Number of event flow days.

4.2 Linkage to other technical reports The groundwater impact assessment should be read in conjunction with other relevant technical reports forming part of the EES. Other potential impacts relating to biodiversity, surface water and contamination have been considered in detail in other technical reports. The outcomes of the groundwater impact assessment were used as inputs to: • EES Technical Report xx: Terrestrial biodiversity impact assessment • EES Technical Report xx: Aquatic biodiversity impact assessment • EES Technical Report xx: Groundwater impact assessment This report also considered: • EES Technical Report xx: Aquatic biodiversity impact assessment • EES Technical Report xx: Groundwater impact assessment • EES Technical Report xx: Geology and Geotechnical assessment. Where relevant to groundwater, other technical reports are considered and referenced.

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5.0 Existing Conditions

5.1 Regional Hydrological Setting The site is located within the Bunyip River Basin which forms part of greater Port Phillip Region. The Bunyip River Basin extent is shown in Figure 2. Figure 2 Bunyip River Basin Extent (BOM surface water catchments)

Flows within the Bunyip catchment are highly modified due to the operation of reservoirs, farm dams, diversions and changes in land use. Streams in the Bunyip basin had variable results for hydrology, with reaches in natural condition through to reaches with extremely modified flows. The only reach with unmodified flows was Ararat Creek (reach 20). All reaches in the Bunyip basin experienced summer stress and most had extended periods of low flow, with many also exhibiting extended periods of zero flows in summer. The Third Index of Stream Condition Assessment provided the following rating for Cannibal Creek: • Hydrology – 4; • Physical form – 10; • Streamside zone – 7; and • Water Quality – not assessed. Under existing conditions, runoff from the project site flows in three primary directions: • North towards Two Mile Creek West where the majority of runoff is intercepted by a southern tributary identified as Unnamed Creek; • South east towards No Name Creek; • South west towards Cannibal Creek;

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Site drainage is shown in Figure A2 (Appendix A). The waterways flow towards the east where they all ultimately connect with Bunyip River.

5.2 Topography The site is located at the eastern end of a NW-SE aligned ridge of outcropping granite, adjacent to Mount Cannibal reserve. Elevation ranges from approximately 160 m AHD on the western margin of the site, to 82 m AHD on the southern and northern margins as the land slopes away from the main ridges central to the site. The site is largely cleared of vegetation, for the purpose of livestock grazing. Existing and remnant vegetation is more present (sporadic) on the southern portion of the site where the topography is steeper. Site surface water features and 2.5 m contour levels are on shown Figure A2 in Appendix A.

5.3 Climate Mean annual rainfall at the nearby Longwarry Bureau of Meteorology (BOM) climate monitoring station (Station ID: 85208, 4 km east of site) is 896 mm/year, based on data collected from 1969 to 2016. Nearby BoM station Noojee (Site 85277, located 31 km north-east of the site, elevation of 275 mAHD) has both recent rainfall (1981 – 2019) and evaporation (1981 – 2012) data. Mean monthly rainfall is 1111 mm/year, and evaporation is 1040 mm/year. Nearby BoM station Cranbourne Botanic Gardens (site 86375, located 35 km south-west of the site, elevation of 85 mAHD) has recent rainfall and evaporation data (1990 – 2019). Mean annual rainfall is 819 mm and evaporation is 1340 mm. Mean annual evaporation at the site is expected to lie somewhere between these two data. Mean monthly rainfall and pan evaporation data for the nearby station with evaporation data available (Cranbourne Botanic Gardens, site 86375, 35 km south west of site). Nearby rainfall and evaporation data are plotted in Figure 3. Average monthly rainfall exceeds evaporation for the months May through August. Figure 3 Mean monthly rainfall and pan evaporation

5.4 Water Quality Water quality has been impacted by changes in land use within the catchment and removal of riparian and aquatic vegetation in some waterways. Two Mile Creek West has been highly modified and while there are intact sections upstream of the Project, the downstream sections have been highly modified and contain reaches of excavated and realigned channel.

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There are undisturbed sections of the upper reaches of Cannibal Creek catchment however the lower catchment has been modified for agricultural purposes. Yarra and Bay2 is a public website with historical water quality data and is supported by Melbourne Water, DELWP and the EPA. The website publishes the results of annual water quality assessments that monitor water quality in major waterways that discharge to Western Port. The assessment measures six water quality parameters including water clarity, metals, pH, nutrients, dissolved oxygen and salinity. The parameters are then used to determine an overall water quality index (shown as WQI on the figures below). The scores are calculated based on the level of attainment of the relevant indicators against the environmental water quality objectives in the State Environment Protection Policy (Waters of Victoria) (SEPP (WoV)) and its Schedule F6 (Waters of Port Phillip Bay), which is now superseded by SEPP (Waters). At each site, the individual water quality indicators are calculated from annual monitoring data, using the relevant statistic that applies to each indicator in SEPP (WoV). These results are then compared to the SEPP (WoV) environmental quality objectives that apply at each site. Figure 4 indicates measured water quality parameters for Bunyip River

Figure 4 Water quality indicators for Bunyip River

5.5 Surface Water description The site is located on a localised ridge which generally falls towards Two Mile Creek West (and its tributaries) to the north and south and Cannibal Creek to the south-west. Runoff from a large section of the southern portion of the is intercepted by a series of artificially constructed ponds and connecting waterways, which is identified as No Name Creek and connects back to Two Mile Creek. Both Two Mile Creek and Cannibal Creek flow toward the east and ultimately join Bunyip Creek. The major waterways and their catchments discussed in this report are indicated in Figure 04 in Appendix A. Runoff from the site flows in three primary directions. A small portion of the site flows to the south west towards Cannibal Creek. No excavation is proposed in this portion of the site however stripped overburden will be stored in this catchment. Figure 05 in Appendix A indicates watershed directions from the site. Two catchments on the southern side of the site flow to the south towards No Name Creek where runoff flows through a series of constructed ponds and ultimately joins Two Mile Creek West on the eastern side of Tonimbuk Road.

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The northern portion of the site flows towards Two Mile Creek West but is intercepted by an unnamed tributary which joins Two Mile Creek West downstream of the site. Runoff from the site does not flow directly into Two Mile Creek. A number of site inspections were undertaken (in 2017 and 2018) to assess catchment conditions and observe flow in Cannibal, Two Mile and No Name Creek. Field measurements taken during the inspections are summarised in Appendix B. 5.5.1 Cannibal Creek Cannibal Creek is approximately 16 km in length and has a catchment area of 5,273 ha to its confluence with Bunyip River. The creek is heavily vegetated and difficult to access except for road crossings. Cannibal Creek was observed to have permanent water with flow rates responding quickly to rainfall within the catchment. Flow velocity in Cannibal Creek was measured on three occasions (at Tonimbuk Road) which was preceded by a dry period and was found to be approximately 0.1m/s. There are a large number of aquatic weeds at Tonimbuk Road crossing where the measurement was taken, and this may influence the flow velocity. 5.5.2 Two Mile Creek West Two Mile Creek West is approximately 9 km in length and has a catchment of 1,634 ha to its confluence with Bunyip River. Two Mile Creek West is largely ephemeral, with flows generally occurring after rainfall events. The creek was observed to be flowing during site visits in April 2018, July 2018 and September 2018. However, was observed to be dry in February 2018, March 2018 and November 2018. Some sections of Two-Mile Creek West have permanent or perennial water. Water quality testing undertaken as part of the hydrogeological investigation indicated this was predominantly groundwater or stagnant pools after rain events. A reach of Two-Mile Creek West downstream of the project site is indicated in Figure 5.

Figure 5 Two Mile Creek West

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5.5.3 No Name Creek Runoff from a significant portion of the site, south of the main ridgeline is intercepted by a series of artificially constructed ponds and connecting waterways which eventually connects back into Two Mile Creek West, east of the site. This creek line is herein referred to as No-name Creek. No-name Creek in its most current state was engineered primarily for ornamental water features as part of the equestrian centre nearly 30 years ago. The profile of a typical pond along No Name Creek is indicated in Figure 6.

Figure 6 Pond along No Name Creek

Flows in No Name Creek were observed to be highly regulated and modified from the natural condition. The waterway is located on an Equestrian Centre and has been constructed to provide a water feature for events and improve amenity. Flow through the waterway is often maintained from extracted groundwater which is pumped into the upstream pond. There are numerous weirs and hydraulic structures along No Name Creek to control flows and maintain water levels. Site inspections observed no flow along the No-Name Creek line in in February and March 2018. Minor flows were observed in winter, spring and early summer. 5.5.3.1 Farm Dams A number of livestock dams were observed within and outside the site boundary, situated in drainage gullies to capture runoff. The dams are identified in Appendix B. Immediately adjacent to the southern boundary of the site is a large neighbouring dam (D98), at RL 82.5 m AHD that receives runoff from a significant catchment on the southern portion of the site.

5.6 Waterway flow Characteristics A MUSIC was developed to estimate historical flow characteristics that can be used to determine the impact of the proposed project. Details of the Hydrological model setup are provided in Section Error! Reference source not found. with the results for the existing conditions discussed below

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5.6.1 Two Mile Creek West Two Mile Creek West has a catchment area of 1,634 ha to its confluence with Bunyip Creek. A catchment plan showing the creek and quarry site catchments is provided in Figure 5 (Appendix A). The waterway has a gradient of approximately 4% in the upper reaches but is approximately 0.65% from the Project site to Bunyip Creek. The hydrological assessment indicates the maximum Average Daily Flow Rate was approximately 6.2m3/s. The historical flows are indicated in Figure 7 (below).

Figure 7 Two Mile Creek Daily Flow Rate

Figure 8 shows the percentage of time a daily flow volume in Two Mile Creek is exceeded. The curve indicates that approximately 68% of the time there is no flow in the Creek due to surface runoff, however there may be flow in the waterway more often due to groundwater ingress. The maximum daily flow volume was 547 ML, however the chart has been limited to 20 ML to show greater definition for the more frequent events.

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Figure 8 Two Mile Creek Daily Flow Volume Percentile

5.6.2 Cannibal Creek Cannibal Creek has a catchment area of 5,273 ha to its confluence with Bunyip Creek. A catchment plan showing the creek and quarry site catchments is provided in Figure 04 in Appendix A. The waterway has a gradient of approximately 2% in the upper reaches but is approximately 0.65% from the Project site to Bunyip Creek. The hydrological assessment indicates the maximum Average Daily Flow Rate was approximately 16.2m3/s. The historical flows are indicated in Figure 9.

Figure 9 Cannibal Creek Daily Flow Rate

Figure 10 shows the percentage of time a daily flow volume in Cannibal Creek is exceeded. The curve indicates that 46% of the time there is no flow in the Creek due to surface runoff, however there may be flow in the waterway more often due to groundwater ingress and base flow. The maximum daily flow volume was 1397ML, however the chart has been limited to 50ML to show greater definition for the more frequent events.

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Figure 10 Cannibal Creek Daily Flow Volume Percentile

5.6.3 No Name Creek No Name Creek receives minimal runoff from the local upstream catchment. Runoff from the Project site discharges predominantly to the large farm dam on the southern boundary (D98) or to a gully at the north east corner which connects to No Name Creek after the ponds. As mentioned in section 5.4.3, flow and water levels in the storages in No Name creek are maintained by groundwater.

5.7 Surface Water Users Southern Rural Water provided details of existing extraction licences within the catchment downstream of the Project. There are a number of Take and Use licences on Bunyip Creek and one on Two Mile Creek West.

5.8 Property Inspections Property inspections were undertaken in February and March with a number of property owners who had indicated they wanted to talk with the surface water and groundwater technical specialists. The discussions allowed the technical specialists to develop a greater understanding of how water is used on various properties surrounding the site, take measurements and provide information relating to potential impacts relating to water. A list of observations from the property inspection is provided in Error! Reference source not found..

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6.0 References Victorian Government, 2018. Western Port Catchment: Report Card for July 2016 – June 2017 < https://yarraandbay.vic.gov.au/report-card/report-card-2017/western-port-and-catchment/western-port- catchment#top_of_report> accessed February 2019. Index of Stream Condition, the Third Benchmark of Victorian River Condition. Department of Environment and Primary Industry 2010 Australian Rainfall and Runoff. A Guide to Flood Estimation. Volume 2. Engineers Australia. 1987 Best Practice Erosion and Sediment Control – Book 2. International Erosion Control Association

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7.0 Limitations AECOM Australia Pty Limited (AECOM) has prepared this report in accordance with the usual care and thoroughness of the consulting profession for the use of Hanson Construction Materials Pty Ltd and only those third parties who have been authorised in writing by AECOM to rely on the report. It is based on generally accepted practices and standards at the time it was prepared. No other warranty, expressed or implied, is made as to the professional advice included in this report. It is prepared in accordance with the scope of work and for the purpose outlined in the proposal dated 08 February 2017. The methodology adopted and sources of information used by AECOM are outlined in this the Report. Where this report indicates that information has been provided to AECOM by third parties, AECOM has made no independent verification of this information unless required as part of the agreed scope of work. AECOM assumes no liability for any inaccuracies in or omissions to that information. This Report was prepared between May 2017 and September 2019. The information in this report is considered to be accurate at the date of issue and is in accordance with conditions at the site at the dates sampled. Opinions and recommendations presented herein apply to the site existing at the time of our investigation and cannot necessarily apply to site changes of which AECOM is not aware and has not had the opportunity to evaluate. This document and the information contained herein should only be regarded as validly representing the site conditions at the time of the investigation unless otherwise explicitly stated in a preceding section of this report. AECOM disclaims responsibility for any changes that may have occurred after this time. This report should be read in full. No responsibility is accepted for use of any part of this report in any other context or for any other purpose or by third parties. This report does not purport to give legal advice. Legal advice can only be given by qualified legal practitioners. This report contains information obtained by inspection, sampling, testing or other means of investigation. This information is directly relevant only to the points in the ground where they were obtained at the time of the assessment. The borehole logs indicate the inferred ground conditions only at the specific locations tested. The precision with which conditions are indicated depends largely on the uniformity of conditions and on the frequency and method of sampling as constrained by the project budget limitations. The behaviour of groundwater and some aspects of contaminants in soil and groundwater are complex. Our conclusions are based upon the analytical data presented in this report and our experience. Future advances in regard to the understanding of chemicals and their behaviour, and changes in regulations affecting their management, could impact on our conclusions and recommendations regarding their potential presence on this site. Where conditions encountered at the site are subsequently found to differ significantly from those anticipated in this report, AECOM must be notified of any such findings and be provided with an opportunity to review the recommendations of this report. Whilst to the best of our knowledge information contained in this report is accurate at the date of issue, subsurface conditions, including groundwater levels can change in a limited time. Therefore, this document and the information contained herein should only be regarded as valid at the time of the investigation unless otherwise explicitly stated in this report. Except as required by law, no third party may use or rely on, this Report unless otherwise agreed by AECOM in writing. Where such agreement is provided, AECOM will provide a letter of reliance to the agreed third party in the form required by AECOM. To the extent permitted by law, AECOM expressly disclaims and excludes liability for any loss, damage, cost or expenses suffered by any third party relating to or resulting from the use of, or reliance on, any information contained in this Report. AECOM does not admit that any action, liability or claim may exist or be available to any third party. AECOM does not represent that this Report is suitable for use by any third party. Except as specifically stated in this section, AECOM does not authorise the use of this Report by any third party. It is the responsibility of third parties to independently make inquiries or seek advice in relation to their particular requirements and proposed use of the relevant property.

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Appendix A

Figures

Revision 0 – 26-Nov-2019 Prepared for – Hanson Construction Materials Pty Ltd – ABN: 90 009 679 734 N A N G A N A LA TROBE RIVER PROJECT ID 60537505 T I M S C O R N E R CREATED BY smitht7 W H I T E S M A C C L E S F I E L D LAST MODIFIED smitht7 26 OCT 2018 www.aecom.com C O R N E R B E E N A K P I E D M O N T B A S A N C O R N E R ( B A W B A W ) ´ DATUM GDA 1994, PROJECTION MGA ZONE XX N A Y O O K 0 1,750 3,500 7,000 A V O N S L E I G H W H I T E S metres W R I G H T 1:150,000 (when printed at A3) E M E R A L D C O R N E R C O C K A T O O ( C A R D I N I A ) BA Legend CK CRE G E N T L E A N N I E F I E L D E R EK G E M B R O O K Hanson Site N E E R I M Major Watercourses

CARDINIA Waterbodies RESERVOIR M O U N T B U R N E T T Freeway/Highway Major Roads D E W H U R S T CREEK . DIAMOND n Parks and reserves (Vicmap) o i t a m

r TARAGO o f n

i RESERVOIR e h t n i T O N I M B U K s J I N D I V I C K n o i s

s P A K E N H A M N O R T H i N E E R I M m o

U P P E R r S O U T H o

N A R N A R , s t c G O O N N O R T H e f e J I N D I V I C K d

, s t l J I N D I V I C K W E S T u a C O R N U C O P I A f

, s r o r r

e G A R F I E L D y n

a N O R T H

r L A B E R T O U C H E o f

T A R A G O y t i l i b

a T Y N O N G N O R T H i l r o

y B U N Y I P N O R T H t i l i S b E i C H s IN IG HIG n PR H RINCES HWA R O K E B Y o P Y p W s e r A Y o n r P A K E N H A M L O N G W A R R Y N O R T H B R A V I N G T O N a e b l l P N A R N A R G O O N D R O U I N a R T Y N O N G PR h INCES R O B I N s I FR NC EEW W E S T M E G A R F I E L D A H O O D O S Y C FREEWAY E B U N Y I P A B U L N B U L N

. k s i r n w o

L O N G W A R R Y r i e h t t a

D R O U I N E A S T o s s e o d

I O N A t i

g P A K E N H A M M E L B O U R N E n i V E R V A L E ! s D R O U I N B U N Y I P u

S O U T H ! n

o ^ s r R Y T H D A L E e p

C O R A L Y N N y n a d n a p a W A R R A G U L m s i h t

K O O W E E W A R R A G U L W E S T n i

d R U P N O R T H e Data sources:

y D A L M O R E E A S T a l D R O U I N S O U T H VicMap data: p s i Background Mapping Data Copyright The State of Victoria 2015. The State of d

n Victoria does not warrant the accuracy or completeness of information in this o i t a B A Y L E S publication and any person using or relying upon such information does so on the m r basis that the State of Victoria shall bear no responsibility or liability whatsoever for o f n i any errors, faults, defects or omissions in the information f o M O D E L L A Imagery: Nearmap (2016) s s e n C A T A N I e t Y A L L O C K e l p K O O W E E R U P R I P P L E B R O O K

m SITE LOCALITY PLAN

o L A R D N E R c r o y c B U L L S W A M P a Y A N N A T H A N r u c c GI U P P E R a S H PP W A R R A G U L OUT SLA e ND

h H t

I S O U T H Hanson Australia Pty Ltd

t G n

a H r

r Figure a Y A N N A T H A N W w t o Hydrology Assessment n A s e A T H L O N E yi o h Q y o Y Bun p N rt uarr d

M E L L I N B A N K Sanders Road, Bunyip North, VIC, A1

O C A L D E R M E A D E

C H E A T H H I L L

E 3815

A ER LANG LANG RIV Map Document: (\\aumel1fp001\projects\605X\60537505\4. Tech work area\4.99_GIS\02_Maps\Surface Water\60537505_01_SITE_LOCALITY.mxd) A3 size PROJECT ID 60537505 CREATED BY smitht7 LAST MODIFIED smitht7 06 NOV 2019 www.aecom.com ´ DATUM GDA 1994, PROJECTION MGA ZONE 55 0 150 300 600

metres 1:12,500 (when printed at A3)

Legend

Hanson Site Boundary Topographic Contours GDA94_Z55 (2014) Watercourse Waterbodies . n o i t a m r o f n i e h t n i s n o i s s i m o r o

, s t c e f e d

, s t l u a f

, s r o r r e y n a r o f y t i l i b a i l r o y t i l i b i s n o p s e r o n r a e b l l a h s

M O C E A

. k s i r n w o r i e h t t a o s s e o d t i

g M E L B O U R N E n i ! s B U N Y I P u

! n ^ o s r e p y n a d n a p a m s i h t n i d

e Data sources: y a l VicMap data: p s i Background Mapping Data Copyright The State of Victoria 2015. The State of d

n Victoria does not warrant the accuracy or completeness of information in this o i t a publication and any person using or relying upon such information does so on the m r basis that the State of Victoria shall bear no responsibility or liability whatsoever for o f n i any errors, faults, defects or omissions in the information f o

Imagery: Nearmap (2016) s s e n e t e l p TOPOGRAPHY AND DRAINAGE m o c r o y c a r u c c a e h t

Hanson Australia Pty Ltd t n a r

r Figure a w t o Hydrology Assessment n s e yi o h Q y

o Bun p N rt uarr d A M Sanders Road, Bunyip North, VIC, 2 O C

E 3815 A

Map Document: (\\aumel1fp001\projects\605X\60537505\4. Tech work area\4.99_GIS\02_Maps\Surface Water\60537505_02_TOPOGRAPHY AND DRAINAGE.mxd) A3 size PROJECT ID 60537505 CREATED BY smitht7 LAST MODIFIED smitht7 06 NOV 2019 www.aecom.com ´ DATUM GDA 1994, PROJECTION MGA ZONE 55 0 120 240 480

metres 1:10,000 (when printed at A3)

Legend Stage 4 Quarry Footprint Pit Overburden Stockpile . n Overburden Stockpile o i t a m r o Hanson Site Boundary f n i e h t n i s n o i s s i m o r o

, s t c e f e d

, s t l u a f

, s r o r r e y n a r o f y t i l i b a i l r o y t i l i b i s n o p s e r o n r a e b l l a h s

M O C E A

. k s i r n w o r i e h t t a o s s e o d t i

g M E L B O U R N E n i ! s B U N Y I P u

! n ^ o s r e p y n a d n a p a m s i h t n i d

e Data sources: y a l VicMap data: p s i Background Mapping Data Copyright The State of Victoria 2015. The State of d

Imagery: Nearmap (2016) s s e n e t e l p PROPOSED FINAL PIT DESIGN m o c r o y c a r u c c a e h t

Hanson Australia Pty Ltd t n a r

r Figure a w t o Hydrology Assessment n s e yi o h Q y

o Bun p N rt uarr d A M Sanders Road, Bunyip North, VIC, 3 O C

E 3815 A

Map Document: (\\aumel1fp001\projects\605X\60537505\4. Tech work area\4.99_GIS\02_Maps\Surface Water\60537505_03_PROPOSED_PIT.mxd) A3 size B U N PROJECT ID 60537505 Y IP CREATED BY smitht7

R LAST MODIFIED smitht7 26 NOV 2019 IV www.aecom.com E R ´ DATUM GDA 1994, PROJECTION MGA ZONE 55 0 550 1,100 2,200

metres 1:50,000 (when printed at A3)

Legend T O N I M B U K Hanson Site Boundary Pit

. Overburden Stockpile n o i t a m Overburden Stockpile r o f n i e h t Catchment n i s n o Cannibal Creek i s s i m o

Two Mile Creek West r o

, s t c

e No-Name Creek f e d

, s t l ile Freeway/Highway u M a o f

, T k

s e r re

o C Major Roads r r e y n

a Parks and reserves (Vicmap) r o f y t i l M A R Y K N O L L C O R N U C O P I A

i Watercourse b a i l r C o

Watercourse y A t i l i N T b

i W

s N O n M

o I B IL p E

s A C e R r E L E o K n W C r E

a S R G A R F I E L D T e b E l l N O R T H a E ^ h Site_Location K s

M O C E A

. k s i r n w o r i e h t t a o s T Y N O N G N O R T H R s

e E o

d V

I t i

g R M E L B O U R N E n i ! s P B U N Y I P u I ! n K B U N Y I P N O R T H Y o EE s R r C L N e BA p I U NN y CA B n a d n a p a m s i h t n i d

e Data sources: y a l VicMap data: p s i PRINCES FREE Background Mapping Data Copyright The State of Victoria 2015. The State of d W

A n Y Victoria does not warrant the accuracy or completeness of information in this o i t P a R publication and any person using or relying upon such information does so on the m I r NC basis that the State of Victoria shall bear no responsibility or liability whatsoever for o E f S n F i any errors, faults, defects or omissions in the information

R f E o E WAY Imagery: Nearmap (2016) s s e n e t e l p CATCHMENT PLAN AND MAJOR m o c r o

WATER WAYS y c T Y N O N G a r u c c a e h t

Hanson Australia Pty Ltd t n a r

r Figure a

w G A R F I E L D t o Hydrology Assessment n s e o d

M B U N Y I P Sanders Road, Bunyip North, VIC, F4 O C

E 3815 A

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ace ain R ip M Buny ´ DATUM GDA 1994, PROJECTION MGA ZONE 55 0 150 300 600

metres 1:12,500 (when printed at A3)

Legend

TWO Quarry Footprint MILE CREEK WEST Pit ry ibuta Overburden Stockpile ed tr . m n na o n Overburden Stockpile i U t a m r o f CatchmentDivide n i e h t Site Internal Catchments n i s n o i s

s Surface Water Catchments i m o r o No-Name Creek

, s t c e f

e Cannibal Creek d

, s t Area = l u

a Two Mile Creek West f

, 28.2 ha s r o r Area = r Hanson Site Boundary e y n 16.3 ha a r Parks and reserves (Vicmap) o f y t i l i b Watercourse a i l r o ! ! y t

i Channel / Drain l i b i Area = 24 ha s n o p s e r o n r a e b

l k l e a re h s C e M m O Na C E No A

. k s i r n w o r i e h t t a o s s e o d t i M E L B O U R N E g n

i B U N Y I P s u n o s r e p y n a d n a p a m s i h t n i d

e Data sources: y a l VicMap data: p s i Background Mapping Data Copyright The State of Victoria 2015. The State of d

Imagery: Nearmap (2016) s s e n e t e l p SITE WATERSHED m o c r o

CHARACTERISTICS y c a r u c c a e h t

Hanson Australia Pty Ltd t n a r r B U N Y I P N O R T H Figure a w t o Hydrology Report n s e Bunyip North Quarry o CANNIBAL CREEK d

M Sanders Road, Bunyip North, VIC, A5 O

C L CREEK E CANNIBA 3815 A

Map Document: (\\aumel1fp001\projects\605X\60537505\4. Tech work area\4.99_GIS\02_Maps\Surface Water\60537505_05_Site Watershed Characteristics.mxd) A3 size AECOM Bunyip North Quarry Surface Water Existing Conditions Report

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Appendix B

Farm Dams

Revision 0 – 26-Nov-2019 Prepared for – Hanson Construction Materials Pty Ltd – ABN: 90 009 679 734 D252 D28 D33 D36 PROJECT ID 60537505 D255 D38 CREATED BY smitht7 LAST MODIFIED smitht7 06 NOV 2019 D12 www.aecom.com D260 D49 D253 D13 D251 D23 D41 ´ D9 D30 D52 DATUM GDA 1994, PROJECTION MGA ZONE XX D46 D51 D263 0 180 360 720 D6 D48 D17 metres D21 1:15,000 (when printed at A3) D256 D15 D53 D258 D259 D267 D27 D42 D29 D254 Legend TW O MI LE CR D262 EEK D65 Hanson Site Boundary D242 D266 WEST D261 ry D55 D240 ibuta D32 Farm dams ed tr D243 nnam D250 U D31 D66 Watercourse D47 D60 D43 D70 D34 D58 D59 D67 D71 Major Roads

. D237 D63 n D57 o Parks & Reserves (Streetpro) i t D61 a D238 D241 D8 D24 D54 D78 m D84 r D39 o f Parks and reserves (Vicmap) n D3 i D257

e D64 h t D2 n i D81

D265 s D234 n D62 o i

s D40 D69 s i D236 D50 m D56 o r D68 o

, D235 s D5 t c e D82 f e D72 d

, D83

s k t l ee u r a D233 f C

, D74 e s D18 m r a o D75 r N r D76 o- e D231 D37 D77 N D89 y

n D73 a r D79 D88 D90 o f y t i l D94 i D80 b D85 D93 a i l r

o D239 D16 y t

i D87 l i b i D86 s D91 n D248 D97 o D95 D96 p D92 s D98 e r o n r a e b l l a h s

M O

C D99 E D101 D104 A D100

. k s i r D103 D102

n D108 w D107 D105 o r i D106 e D141 h t

D115 t D219 a D175

o D222 s

D218 s D114 D112 e D110 o D211 d D179

t D109 i

g M E L B O U R N E n i D129 ! s B U N Y I P u D144 ! n D113 ^ o

s D217 D204 r

e D208 p y n a

d D124 n D145 a D117 D138 p D122 D116 a D189 D187

m D132 s i

h D123 t D119 D121 D120 n i D118

d D203 e D150 Data sources: y a l D142 VicMap data: p D190 D125 s i D206 Background Mapping Data Copyright The State of Victoria 2015. The State of d n D202 D137 Victoria does not warrant the accuracy or completeness of information in this o

i D156 t D210 a publication and any person using or relying upon such information does so on the m r D147 basis that the State of Victoria shall bear no responsibility or liability whatsoever for o D197 D140 f D131 n i D157 D126 any errors, faults, defects or omissions in the information f o D128 K D133 Imagery: Nearmap (2016) s D209 D207 EE s D166 CR D127 e D163 D155 L n IBA e N t AN e C l D171 D130 p IDENTIFIED NEARBY DAMS m D169 D134 o c D201 D143 r D173 D139 D135 o

D149 y D181 D136 c a r u D177 D146 c c D178 a D151 e

h D194 t

Hanson Australia Pty Ltd t n

a D195 r r D193 D160 Figure a

w D167 t o Surface Water Impact Assessment n s e o d

M D188 D148 Sanders Road, Bunyip North, VIC, B O C

E 3815 A D198 D184 D174 D152 Map Document: (\\aumel1fp001\projects\605X\60537505\4. Tech work area\4.99_GIS\02_Maps\Surface Water\60537505_00_DAM PDF.mxd) A3 size AECOM Bunyip North Quarry Surface Water Existing Conditions Report

D R AD FR TA F T

Appendix C

Field Measurements

Revision 0 – 26-Nov-2019 Prepared for – Hanson Construction Materials Pty Ltd – ABN: 90 009 679 734 337,479.51

Sizing Type A basin includes decant strucure at outlet and automated chemical dosing system Permanent design Full Area less dam Area 1 230,000.00 m2 full site area Permanent: Area 2 m2 dam area full area less dam catchment A = 230,000.00 m2 full site area less dam area

i) Optimum low-flow decant rate: Qa 0.001 m3/s/ha Trial flow Table B5 K 21.407 from table B8 5 year + % increase from 2yr to 5yr I 3.48 mm/hr IFD Data sheet tab 20% AEP 24hr Ks 12000 Table B9 no jar test available Ds 1 m nominated Ds - to match table B5 Qa 0.0168 m3/s/ha Optimum low flow decant rate

Total discharge (QL) 82.8000 m3/h

ii) Optimum settling pond depth: Ds (optimum) 16.84 m Equation B4

iv) Minimum settling zone volume, Vs:

Vs 4647 m3 Equation B6 K 21.407 A 23.0 ha full site I 3.48 mm/hr X 10 yrs

v) Minimum settling zone surface area requirement, As: Equation B10 As 276.0 m2 4 33.9 Ks 12000 s/m 6 26

QL 0.02 m3/s *Qa*A

QA 0.001 m3/s/ha Interpolation of Table B8 A 23.0 ha full site 30.8 33.9 4 26.85 29.95 5 22.9 26 6 17.4 19.3 Step 1A Determine the design event 1.109195 21.40747 10 years IECA Best practice erosion and sediment control Appendix B Sediment Basin design June 2018

Step 2A Select a trial low-flow decant rate (Qa) Qa 0.0090 m3/s/ha Table B5 5l/s Ballarat (DS= 1.0m)

Step 3A Determine the optimum settling pond depth Ds 16.84 m Equation B4

Step 4A Choose a 'design' settling zone depth (Ds) Ds 1.90 m adopted Equation B4 depth

Step 5A Calculate the minimum, average, settling zone surface area (As) As 276.0 m2 Equation B10

Step 6A Calculate the requried settling zone volume (Vs) Greater of i) or ii) Vs 4647 m3 minimum volume based on Equation B6 Vs 524 m3 As*Ds

Vs 4647 m3 required settling volume

Step 7A Nominate the depth Df of the free water zone 0.3 m adopted value Large Catchment area

Step 8A Check for the potential re-suspension ???

Step 9A Determine the length and width of settling zone LC>3Wc Lc 86.4 m 2488.32 80.72 Wc 28.80 m Ds 1.90 m Vs 4727.81 > 4647

Top width Ds/2 0.95 1 on 3 2.85 Ltop 89.25 Wtop 31.65 Ds

Step 10A Determine the remaining dimensions of the sediment basin.

Dt 3.03 m depth of basin Dfw m 3 m bank slope slope 1 in 3 m inlet slope Dss 0.83 m sediment storage zone Dss Ds/Dss 2.2874 K1 0.8694 coefficent from Table B11 interpolated K2 1349 coefficent from Table B11 interpolated K3 -0.7713 coefficent from Table B11 interpolated

2066.87 m3 Volume as % of Vs 44%

Step 11 Determine the size of the inlet pond 10% of main chamber LC>3Wc Lc 25.73 m Wc 10.00 m Ds 1.25 m Vs 321.63 > 473

Interpolation of Table B8 K1 0.8793 1 0.87735 1.1 0.8754 1.2

K2 442 1 584 1.1 726 1.2

K3 -0.4036 1 -0.48655 1.1 -0.5695 1.2

Table B11 from IECA APPENDIX B Location Date Flow Dissolve Oxygen (mg/L) Electrical Conductivity (µS/cm) pH Redox (mV) Temp (°C) Comment No Name Creek (up-stream D80) 19/12/2017 Very low. Estimated 0.1 - 0.2 L/s - - - - - No Name Creek (up-stream D80) 13/03/2018 No flow, dry - - - - - Drainage line is observed to be dry No Name Creek (up-stream D80) 6/07/2018 Low flows. Measured <0.3m/s - - - - - Had been raining all morning No Name Creek (up-stream D80) 10/09/2018 Very low. Estimated 0.1 - 0.2 L/s No Name Creek (up-stream D80) 20/09/2018 Low. Estimated <0.2 L/s 7.22 1954 6.29 447 15.11 No Name Creek (up-stream D80) 6/06/2019 Very low. 9.15 1811 6.57 144 12.38 No Name Creek (D80) 15/03/2018 No flow in pond 9.71 1113 6.42 144 18.2 No Name Creek (D80) 6/06/2019 No flow in pond 11.3 1260 6.49 225 11.4 No Name Creek (D83) 20/09/2018 No flow in pond 9.36 1420 6.27 532 16.23 No Name Creek (D98) 15/03/2019 No flow in pond - 5060 - - - No Name Creek (D98) 6/06/2019 No flow in pond - 3482 - - - Dam (D18) 20/09/2018 No flow in pond 4.95 292 7.3 455 16.29 Two Mile Creek (@ Tonimbulk Rd) 13/03/2018 No flow - - - - - Creek bed is dry Two Mile Creek (@ Tonimbulk Rd) 6/07/2018 Measured <0.3m/s - - - - - Water in creek but no measurable flow, rain all morning Two Mile Creek (@ Tonimbulk Rd) 10/09/2018 Measured 0.1 - 0.2m/s - - - - - L=1.3m; Depth = 0.15m ~10L/s Two Mile Creek (@ Tonimbulk Rd) 20/09/2018 - 9.14 719 6.57 575 13.98 Low flow Two Mile Creek (@ Tonimbulk Rd) 27/11/2018 >10 L/s - - - - - Reasonable flow, likely due to heavy rainfall 20-21 Nov 2018 Two Mile Creek (@ Tonimbulk Rd) 6/06/2019 - 8.85 1040 5.89 157 9.97 Cannibal Creek (@ Tonimbulk Rd) 13/03/2018 Measured <0.3m/s - - - - - Water in creek but no measurable flow Cannibal Creek (@ Tonimbulk Rd) 6/07/2018 Measured <0.3m/s - - - - - Water in creek but no measurable flow, rain all morning Cannibal Creek (@ Tonimbulk Rd) 10/09/2018 Measured <0.3m/s - - - - - Water in creek, unobservable flows (<0.3m/s) due to heavily vegetated Cannibal Creek (@ Tonimbulk Rd) 20/09/2018 - 10.01 203 6.87 586 12.24 Cannot observe movement of water, very slow through reeds AECOM Bunyip North Quarry Surface Water Existing Conditions Report

D R AD FR TA F T

Appendix D

Property Inspections

Revision 0 – 26-Nov-2019 Prepared for – Hanson Construction Materials Pty Ltd – ABN: 90 009 679 734 PROJECT ID 60537505 CREATED BY smitht7 LAST MODIFIED smitht7 20 NOV 2019 www.aecom.com ´ DATUM GDA 1994, PROJECTION MGA ZONE 55 0 150 300 600

metres 1:12,500 (when printed at A3)

Legend

*# 2018 February / March Field Inspections *# Other Surface Water Measure Points Adjacent Property Inspected Hanson Site Boundary 2014_Contour_GDA95_z55 . n o i t a Watercourses and Drainage m r o f n i

e Dams h t n i s n o i s s i m o r o

, s t c e f e d

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, s r o r r e y n a r o f y t i l i b a i l r o y t i l i b i s n o p s e r o n r a e b l l ^ a Site_Location h s

M O C E A

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e Data sources: y a l VicMap data: p s i Background Mapping Data Copyright The State of Victoria 2015. The State of d

Imagery: Nearmap (2016) s s e n e t e l p SURFACE WATER FIELD m o c r o

INSPECTIONS y c a r u c c a e h t

Hanson Australia Pty Ltd t n a r

r Figure a w t o Hydrogeological Report n s e o d

M Sanders Road, Bunyip North, VIC, A4 O C

E 3815 A

Map Document: (\\aumel1fp001\projects\605X\60537505\4. Tech work area\4.99_GIS\02_Maps\Groundwater\GEL\Revision 1\60537505_A04_SW FIELD INSPECTIONS.mxd) A3 size Bunyip North Site Visits 1

R008 Visual Questions Conformation / Photos Dams Y Owner states the property 3 dams (>17 years old), all in series all along the same drainage line running north to south towards Two-Mile Creek West. 1st small dam is wet all the time in winter Large dam at the bottom of the rise (Two Mile Creek West flood plain) has a constant water level all year round, likely intersecting groundwater based on topography and depth of the dam. Swampy for much of the year

Reasonable sw catchments.

Waterbodies Y Running through your property. Flowing at what times of the year? Any permanent pools? Two Mile Creek West is located on the south of the property. Floods on occasion. Has flows 7-8 months of the year. Generally, has permanent ponds along the creek. Big dam over flows to two mile creek.

Springs Any on property? Regularity of flow? Most springs on the property are located on the south facing slope, north of two mile creek. Likely that the most productive spring/s are beneath constructed dams.

In winter, spring adjacent to Topp Road flows freely and may be due to the landscaping cutting out the natural topography. Also very close to aqueduct.

The bore has a number of soaks on the property, where mounding groundwater is not flowing but causing boggy localised areas

No springs/ soaks on the southern side of two mile creek.

Bores Any on property? Any in the area? Flows/Depth/Quality? NA

Other Uses water from aqueduct. Concerns dams will go dry, vegetation will dry out.

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R031 Visual Questions Conformation / Photos Dams 1 Dam, considered to be partially fed by groundwater and ‘drought resistant’

Waterbodies Drainage line runs west to east through site, spring probably historically fed into drain line

Springs Two Springs, both captured Spring 1 E387486 N5787143 EC 3.86mS/cm, DO: 1.29mg/L, pH 5.07, Redox: 220mV, Temp, 16.8C Spring 2 E387508 / N5787026 EC: 3.01mS/cm, DO: 3.73mg/>, pH:6.34, Redox 157mV, Temp: 17.4C

Bores NA

Other Owner has been 36 years on property, and stated to be drought proof through millennium drought. Lots of overland flow in rainfall events, regular sheet flows

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R051 Visual Questions Conformation / Photos Dams 10 dams on property 1 Large dam which is mainly a wildlife habitat – fed from Hanson Catchment. 98 years old. 2017, low rainfall, still plenty of water, expect to be GW fed as was apparently dug quite deep. Dam 1 DS E386386 n5787634 DO: 2.93mg/L, EC: 2.342mS/cm, pH: 6.06, Redox: 145mV, T: 23.6C Dam 1 US E386224 N5787499 DO: 6.05mg/L, EC: 5.06mS/cm, pH: 6.23, Redox: 127mV, T26.8C

Dam 2 captures water from western portion of Hanson property

Dam 3 is drought resistant and likely due to being fed by a spring. Unable to check water quality (out of time).

Waterbodies Cannibal Creek along southern boundary, chain of dams on west of property feed into CC.

Springs No permanent springs other than those feeding dams Areas noted where many springs pop up in winter

Bores MB08 DTW 0.625mbtoc DO: 1.46mg/L, EC: 3.98mS/cm, pH 4.46, Redox: 240mV, T: 21.6C

Other Current owner 14 years Prior owner 25 years

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R113 Visual Questions Conformation / Photos Dams Dam 1 along drainage line south of Two Mile Creek West, has a wetland up stream, looks green and lush at current. No confirmation that spring fed. Intersects surface water flows coming off Hanson Property.

Dam 2 adjacent to Two Mile Creek, spring fed, has never dried out in 23 years. DO: 6.58mg/L, EC: 1.164mS/cm, pH: 6.49, Redox: 1546mV, T: 22.3C

Waterbodies Two Mile Creek – Owner used to pump out of but not a consistent supply. TMC regularly dries out, but adjacent spring is always flowing.

TMC Water Quality DO 8.56mg/L, EC: 1.29mS/cm, pH: 7.06, Redox: 144mV, T: 23.9C

Springs One permanent spring 40m south of Two Mile Creek West. Currently feeds Dam, unable to access (vegetation)

Anecdotally a number of springs pop up on southern portion of site periodically.

Bores None

Other Current owner stated they have been on the property for 23 years. 62 acres

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R011 Visual Questions Conformation / Photos Dams 1 Dam north of two mile creek, not utilised, in the wrong location

Waterbodies Two Mile Creek West runs through property, frequent flows

TMC DO: 5.19mg/L, EC 0.805mS/cm, pH: 6.86, Redox: 140mV, T: 22.0C (stagnant pool sample)

Springs 1 Soak E386886 / N5788861 was wet and boggy on inspection but not flowing. GW causing mounding of ground

West of orchard area, multiple spring sites in winter, current evidence of green vegetation lines parallel to topography, adjacent to Sanders Road.

Bores Any on property? Any in the area? Flows/Depth/Quality?

Other

Owner currently accesses water from aqueduct

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R111 Visual Questions Conformation / Photos Dams Dam 1 – Spring Fed. Does not collect any water from catchment (segregated by bund). Has not gone dry since have been at the property.

DO: 7.43mg/L, EC: 1.887mS/cm, pH 7.03, Redox: 155mV, T: 24.4C

Waterbodies Two Mile Creek flowing through property TWC WQ E385759 / N5789361 DO: 5.48mg/L, EC: 0.474mS/cm, pH: 6.96, Redox: 142mV, T: 20.02C

Unnamed drainage line south of TMC – has a permanent water body in the wetland area, portion of catchment appears to come from Hanson property Unable to obtain water quality, fenced off and very boggy area.

Springs Very wet property, land is green in February, in particular the southern boundary adjacent to Sanders Road, anecdotally a location where many springs pop up during winter.

Spring / Soak E385618 / N5789388 Not flowing, just boggy area

Permanent spring feeds Dam 1

Bores Old bore next to main dam, not in use, previous owner constructed potentially one year when not much water on the site. Unable to locate.

Other 16 years on property 100 acres

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R070 Visual Questions Conformation / Photos Dams Mt Cannibal Dam, constructed on drainage line receiving flow from Mt Cannibal catchment, water generally very tannic (sw or fresh gw?). DB says pics up tannins as water infiltrates into rock through organic rich soils. Mt Cannibal Dam WQ D/s DO: 11.90mg/L, EC: 202uS/cm; pH: 6.68, Redox: 178mV: T: 23.33C U/s DO: 12.18mg/L, EC: 205uS/cm; pH: 6.90; Redox: 196mV: T:24.68C

Dried up during millennium drought.

Chain of 5 dams in the south, up to 60 feet deep. Historical sand and gravel ‘sluice’ quarrys, as well the dams to the south of Bassed Road on adjacent property. DB says they are in direct connection to Cannibal Creek, water level fluctuates similar to CC. Bottom fed through the sand and gravel layers

Main Dam DO: 9.89mg/L; EC 386uS/cm; pH: 7.14; Redox: 197mV; T: 24.84C

Chain of Dams at discharge point (Bassed Road) DO: 9.11mg/L; EC: 430uS/cm; pH 7.06; Redox 197mV; T 25.24C

Waterbodies Cannibal Creek flows to the south of the property and is expected to be well connected to the artificial chain of dams on the property which are likely windows to the quaternary sediment groundwater table.

Springs Seepage points are noted adjacent to the chain of dams, on the flood plain. Not currently flowing, boggy ground only.

Bores None on property and none known on adjacent properties

Other 98 Acres 50 head of cattle Previously (60-80 years ago) the area was sand and gravel quarries.

Owners main concerns are around the environmental water requirements, and whether drying of the land due to dewatering with have a lasting impact on spring flows similar to shamrock quarry nearby.

Owner is also concerned how the quarry will manage surplus water, what the quality will be and how will it be disposed in a safe manner for the environment.

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