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Van Diemen CONSULTING PO BOX 1 NEW TOWN TAS 7008

ENVIRONMENTAL EFFECTS REPORT WINDSOR’S QUARRY, HAYES AN INCREASE TO THE ANNUAL PRODUCTION LIMIT

Windsor’s Quarry, Hayes – Environmental Effects Report

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CONTENTS

PART A ‐ PROPONENT INFORMATION ........................................................ 4

QUARRY DETAILS ............................................................................................. 4 BACKGROUND ................................................................................................. 4

PART B ‐ PROJECT DESCRIPTION ................................................................. 6

PART C ‐ PROJECT AREA ............................................................................. 6

PLANNING SCHEME .......................................................................................... 6 Zoning ..................................................................................................... 6 Development Use ................................................................................... 7 Other Provisions ..................................................................................... 8

SITE ACCESS AND ROAD NETWORK ...................................................................... 9 GEOLOGY, LAND CAPABILITY AND LANDSLIDE HAZARD ............................................ 10 SURFACE WATER DRAINAGE .............................................................................. 11 QUARRY PLANS ............................................................................................... 12

Existing Layout ...................................................................................... 12 Proposed Layout ................................................................................... 13 Quarry Extraction Plan ......................................................................... 14 High Voltage Transmission Line Management ..................................... 14

PART D ‐ POTENTIAL ENVIRONMENTAL EFFECTS ...................................... 15

FLORA AND FAUNA ......................................................................................... 15 WEEDS ......................................................................................................... 16 RIVERS, CREEKS, WETLANDS AND ESTUARIES ........................................................ 16 SURFACE AND GROUNDWATER MANAGEMENT ...................................................... 16 AIR EMISSIONS ............................................................................................... 17 LIQUID EFFLUENT ............................................................................................ 18 SOLID WASTES ............................................................................................... 18 NOISE EMISSIONS ........................................................................................... 18 TRANSPORT IMPACTS ...................................................................................... 20 OFF‐SITE IMPACTS ........................................................................................... 21 DANGEROUS SUBSTANCES AND CHEMICALS .......................................................... 21 SUSTAINABILITY AND CLIMATE CHANGE ............................................................... 22 CULTURAL HERITAGE ....................................................................................... 22 SITES OF HIGH PUBLIC INTEREST ......................................................................... 22 SITE CONTAMINATION ..................................................................................... 22 SIGNIFICANT AREAS ......................................................................................... 22 COASTAL ZONE ............................................................................................... 22


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MARINE AREAS .............................................................................................. 22

PART E ‐ REHABILITATION OF WORKINGS ................................................ 23

PART F – MANAGEMENT COMMITMENTS ................................................ 24 FIGURES Figure 1 ‐ Location of Windsor’s Quarry Figure 2 ‐ Land Titles and Mining Lease Figure 3 ‐ Planning Scheme zoning and Mining Lease Figure 4 ‐ Mining Lease and road network Figure 5a ‐ Natural drainage and catchments around and through the Mining Lease Figure 5b ‐ Geology and the Mining Lease Figure 5c ‐ Land Capability and the Mining Lease Figure 5d ‐ Landslide Hazard Planning Map v2 – Hazard Bands Figure 6a ‐ Existing Quarry Layout Figure 6b ‐ Proposed Quarry Layout Figure 6c ‐ Quarry Access Figure 6d ‐ Quarry Extraction Plan Figure 6e ‐ Catchment of sediment pond Figure 7 ‐ Natural Values Atlas data for threatened species Figure 8 ‐ Vegetation in the Mining Lease Figure 9 ‐ Weeds in Mining Lease Figure 10 ‐ Nearest Permanent Residence and buffers

APPENDICES Appendix 1 EER Guidelines issued by EPA Appendix 2 Land Title Information Appendix 3 Weed Management Plan (Draft) Appendix 4 Windsor’s Quarry, Hayes – Rainfall runoff volume and sediment capture

assessment by Hydrodymanica Appendix 5 A Guide to working safely near overhead power lines


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PART A ‐ PROPONENT INFORMATION

MSD Constructions Pty Ltd is a construction company with expertise in earthworks, project management, road construction and maintenance, vegetation management (rehabilitation, weed control works, slashing/lopping etc) and infrastructure installation (eg. pipework and pump stations).

Windsor’s Quarry is one of three operated by the company (others are Cates Quarry at Lachlan and Paddy’s Quarry at Tarraleah) to supply their projects and local customers.

The company is based at Magra and the principal’s details are:

Mr Danny Hills Director Mailing: Post Office Box 7 NEW NORFOLK TAS 7140 Office: 2 Daniels Rd MAGRA TAS 7140 ABN: 97 052 480 010 Mobile: 0428 124 362 Phone: 03 6261 4888 Fax: 03 6261 4900 Email: [email protected]

QUARRY DETAILS

Physical address – 2118 Lyell Highway HAYES TAS 7140 (property ‘Springfield’) Mining Lease Number – 1889/PM Lease Size – 4 hectares Disturbed Area (max. permitted under Mining Lease) – 2 hectares Current limit – 4,000 cubic metres Permit – DA 176/2008 (issued by the Derwent Valley Council – Level 1 Activity under EMPCA) Planning Zones (New Norfolk Planning Scheme 1993) – Agriculture and General Rural

BACKGROUND

Windsor’s Quarry is located at Cider Hill on a 79.46 hectare parcel of land (‘Springfield’) at Hayes in the Upper Derwent Valley, Tasmania (Figures 1 and 2).

MSD Constructions Pty Ltd has operated the quarry at ‘Springfield’ for nearly six years (effective 29 October 2008) providing a selection of high quality construction materials contributing significantly to regional development. The quarry is operating under permit DA 176/2008 issued by the Derwent Valley Council – Level 1 Activity under EMPCA. An Extractive Industry is a permitted use under the New Norfolk Planning Scheme in the Agriculture and General Rural Zones. The main quarrying activities currently include the following:

surface site preparation by soil removal and stockpiling; excavation, ripping and crushing of gravel material; stockpiling of processed material in quarry area; loading trucks with wheel loader from stockpile area in quarry; and the transport of materials by trucks ranging from 12 to 30 tonne capacity.

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Windsors Quarry - EERFigure 1: Location of Windsors Quarry

Mining Lease 1889P/M

NEWNORFOLK

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Windsors Quarry - EERFigure 2: Land Titles and Mining Lease

Mining Lease 1889P/MCadastral Parcels

ACCESSROADINTERSECTION OFACCESS ROAD ANDLYELL HIGHWAY

MININGLEASE

TRANSMISSIONLINES

TITLE: 121275/1PID: 7796291PRIVATE PARCEL

TITLE: 109350/1PID: 7715594PRIVATE PARCELTITLE: 163651/1PID: 3236633CROWN LAND




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Plate 1. Images of the Windsor’s Quarry and surrounds

A

Existing benching in the pit showing the nearby overhead power transmission line.

B

Gravel stockpile in the pit awaiting collection by delivery trucks.

C

Existing bench and active quarry face – bench will be extracted to produce a single active face then another extraction bench will be commenced.

D

Soil bunding (stripped topsoil) along the western side of the pit.


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PART B ‐ PROJECT DESCRIPTION The project is to increase the volume of gravel material able to be produced and transported from Windsor’s Quarry: volume increase from 4,000 to 20,000 cubic metres material produced per annum. The quarry will regularly produce between 6,000 and 10,000 cubic metres of material per annum. The requested 20,000 cubic metre annual production limit will cover these regular annual production levels and allow flexibility to quickly respond to future local demand, market conditions and specific projects (e.g. major road upgrades). The expanded operation operating at full capacity should employ three people on the site. The main quarrying activities will continue to be the following:

surface site preparation by soil removal and stockpiling; excavation, ripping and crushing of gravel material; stockpiling of processed material in quarry area; loading trucks with wheel loader from stockpile area in quarry; and the transport of materials by trucks ranging from 12 to 30 tonne capacity.

Operating hours will continue to be the current operating hours – 0700 to 1900 hrs Monday to Friday, 0800 to 1600 hrs on Saturday; closed on Sunday and public holidays.

PART C ‐ PROJECT AREA

The site has been utilised for quarrying for a number of years due to its high quality, ease of extraction/processing and close proximity to a transport route to local markets. The gravel from the quarry is mainly used locally for a variety of purposes but mainly for road construction.

PLANNING SCHEME

The quarry expansion is already operational as a Level 1 Activity authorised by a Planning Permit (DA 176/2008) issued by the Derwent Valley Council.

Zoning The land upon which the quarry (and Mining Lease) is located is located within two zones ‐Agriculture and General Rural ‐ under the New Norfolk Planning Scheme 1993 (the Scheme; Figure 3).

The Scheme provides the following purpose for all Rural Zones under Part 5:

5.1.1 The Scheme uses three zones to provide a range of planning controls in recognition of the varying agricultural potential of the rural lands within the municipal area.

5.1.2 The better quality farmland continues to be protected from development which would cause loss in agricultural productivity or create potential land use conflicts in the future.

5.1.3 Some rural land of marginal agricultural value has been identified for possible subdivision into small rural size lots.

5.1.4 A large part of the municipal area, mostly that land undeveloped for agricultural use, has been zoned in the General Rural Zone. Subdivision of this land is limited.

5.1.5 State Forest land and large land areas principally owned by A.N.M. and developed for forestry purposes, have been zoned Forestry. This zone recognises the continuing use of this land and its resource for future forestry operations.

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Windsors Quarry - EERFigure 2: Planning Scheme zoning and Mining Lease


AGRICULTUREZONE GENERALRURALZONE

FLOOD PRONEAREA SPECIAL AREA

LANDSCAPEPROTECTIONSPECIALAREA

LANDSCAPEPROTECTIONSPECIALAREA

MININGLEASE

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Windsors Quarry - EERFigure 4: Mining Lease and Road Network

Mining Lease 1889P/Mtransport_segments

ACCESSROAD

INTERSECTION OFACCESS ROAD ANDLYELL HIGHWAY

MININGLEASE

ON PROPERTYINTERSECTION

RAILCROSSING

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Windsors Quarry - EERFigure 5a: Natural drainage and catchments around and throughthe Mining Lease

Catchments3Mining Lease 1889P/M

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Windsors Quarry - EERFigure 5b: Geology and the Mining Lease

Geology (1:25,000)Mining Lease 1889P/M

MININGLEASE

Rcq - Permo-TriassicUndifferentiated quartz sandfstone, feldspathic sandstone andmicaceous siltstoneJd - JurassicDolerite and related rocks

Qpad - QuaternaryOlder alluvium of river terrace,predominantly dolerite derived

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Windsors Quarry - EERFigure 5c: Land Capability and the Mining Lease


MININGLEASE

CLASS 4FIELD CHECKED

CLASS 6FIELD CHECKED

CLASS 5FIELD CHECKEDCLASS 4FIELD CHECKED


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The intent of the two specific zones covered by the Mining Lease are –

INTENT OF THE AGRICULTURE ZONE.

The intent of this Zone is:

(a) to maintain and maximise the agricultural potential of good quality farmland for the future;

(b) to encourage expansion and diversity of agricultural opportunities;

(c) to avoid potential conflict between residential use and agricultural operations by preventing small lot rural subdivision;

(d) to retain the prevailing rural character; and

(e) to allow for associated and compatible rural uses.

INTENT OF THE GENERAL RURAL ZONE.

The intent of this Zone is:

(a) to prevent marginal rural land from being subdivided and developed for smaller rural lots;

(b) to limit the environmental hazards and land management problems that could occur with further subdivisions and development; and

(c) to allow for associated and compatible rural uses, including forestry operations.

The further development and use of the quarry is consistent with the objectives of both zones, specifically –

the quarry is located on poor agricultural land (mostly Land Capability 6, Figure 5c);

it will not interfere with the rural character of the region nor will it create land use conflicts with adjoining lands (the quarry has operated now for a number of years without complaints from adjoining landowners);

the development does not include subdivision of land; and

environmental hazards (eg. water management) will be managed at the quarry.

Development Use

A quarry is defined as an Extractive Industry –

‘means the Development of any Premises for the extraction of minerals, sand, gravel, clay, soil, rock, turf, stone or any similar substance from land. The term includes:

(a) the extraction of any overburden;

(b) any treatment including crushing or screening of that substance on the same Premises;

(c) the associated storage of goods or materials used in connection with or resulting from that Extractive Industry;

(d) the sale of goods or materials resulting from that Extractive Industry; and

(e) the repair and maintenance of vehicles and machinery used in connection with that Extractive Industry.’


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An Extractive Industry is a Permitted Use in both the Agriculture and General Rural ‐ under the New Norfolk Planning Scheme 1993 (the Scheme; Figure 3) ‐ is already operational as a Level 1 Activity authorised by a Planning Permit (DA 176/2008) issued by the Derwent Valley Council.

The required setbacks under Section 5.7 of the Planning Scheme are already established at the quarry. Four car parks are provided for staff and visitors which is in excess of the required number of three (1 space per 1.5 employees – Table S5.1 of Schedule 5 of the Planning Scheme).

The Rural Character, as per Section 5.8 of the planning Scheme requires –

‘…The objectives to satisfy this aim are:

(a) that the design and appearance of Buildings respect the rural or natural setting;

(b) that Development has a minimal impact on the existing landscape character of the surrounding area; and

(c) that Development will not significantly alter or impact on the natural environment, flora and fauna habitats, Watercourses and skyline.

The quarry already has an Access Road and there will be no construction of buildings, dwellings or other structures as part of the development. The quarry face and floor cannot be seen from the Lyell Highway (major road and tourist route) nor any nearby vantage point including tourist routes or residential areas.

Other Provisions

Unstable land

The development includes an area classified as Medium and Low Hazard (Figure 5d). The quarry is accessing material from the northern side of the hill which is not naturally steep, as opposed to the section of hillside to the eastern side of the Mining Lease which is steep (the latter being the area identified by the Hazard Bands). There is evidence of previous (historic) quarry workings in an area along the Access Road (stockpiled coarse rock, unnatural markings and shaping of the dolerite embankment), but this is outside the Mining Lease.

As the quarry activity does not require blasting it is very unlikely that the activities of ripping and crushing will materially affect the stability of the slope to the eastern side of the Mining Lease. Furthermore, the slope itself above the Access Road is vegetated with shallow and deep rooted annuals and perennials and shows no evidence of slumping or rockfall (either recent of historical). The quarry operator will continually assess the slope for evidence of slumping and rockfall during periods of operation and seek advice from a suitably qualified person/company if either event occurs1.

Flood prone areas

The quarry, Access Road and Mining Lease are not flood prone.

Fire Hazard Areas

The development does not include the construction of any buildings nor is the quarry likely to contribute to the fire risk of the region.

1 Commitment 1: The quarry operator will continually assess the slope for evidence of slumping and rockfall during periods of operation and seek advice from a suitably qualified person/company if either event occurs.

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Windsors Quarry - EERFigure 5d: Landslide Hazard Planning Map v2 - Hazard Bands


MININGLEASE

Hazard Band: LowThis area has no known active landslides, however it hasbeen identified as being susceptible to landslide by MineralResources Tasmania (MRT)

Hazard Band: MediumThe area has known landslide features, or is within a landslidesusceptibility zone, or has legislated controls to limit disturbance ofadjacent unstable areas.


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Historic buildings, structures and objects

The development does not affect any historic buildings, structures or objects.

Buffer areas

The buffer areas apply to the development of dwellings within close proximity to existing uses as listed in S8.5.1 of the Planning Scheme.

Riverside, wetland and shoreline areas

The development does not involve subdivision.

Tree preservation

This provision doesn’t apply as the zoning is rural.

Landscape protection areas

The Mining Lease is not within a Landscape Protection Area.

SITE ACCESS AND ROAD NETWORK

The quarry (and Mining Lease) is accessed from an Access Road which joins onto the Lyell Highway near Hayes (Figure 4). The quarry has quick and efficient (short distance to travel) access to the Lyell Highway which is owned and maintained by the Department of Infrastructure, Energy and Resources. The gravel Access Road is an on‐farm road used to access both the quarry and also paddocks in the northern section of the ‘Springfield’ property. The Access Road is used by the owners of the residential property on ‘Springfield’ and crosses the Derwent Valley Line Railway (now disused). The Access Road is gravel and has two passing areas along its length such that trucks and other vehicles can safely pass (Plate 2D). Culverts have been installed at drainage locations and the road surface exhibits no evidence of erosion from excessive surface flows.

Plate 2. Images of the Windsor’s Quarry and surrounds

A

Junction of Access Road and Lyell Highway (red arrow) looking south from Lyell Highway.

B

Junction of Access Road and Lyell Highway – looking west.


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C

Junction of Access Road and Lyell Highway – looking east.

D

Disused railway line (red arrow shows location of tracks, covered by gravel) crossing Access Road.

E

Access Road near junction with residential access track showing gate.

F

Gravel Access Road with truck passing area (left of image).

GEOLOGY, LAND CAPABILITY AND LANDSLIDE HAZARD

The geology of the quarry is Jurassic dolerite with a thin clay‐loam soil derived from in situ weathering of the bedrock. The site is dominated by Jurassic dolerite with small areas of Triassic mudstone – sandstone occurring in the northern and north‐eastern corners of the Mining Lease (Figure 5b), such as that exposed along the Access Road (Plate 3B). The Land Capability recorded by DPIPWE in the area is 4 and 6 (Figure 5c) however the steep terrain, shallow skeletal soils and rockiness of the soil at the quarry would make a Land Classification of 5 to 5 more appropriate.

The eastern side of the quarry is within the Medium Hazard Band for landslide potential (Figure 5d) which is in part due to the very steep slopes (>26 degrees) along the western side of the Access Road into the quarry (Plate 3A). While the slope is steep, it is vegetated with native eucalypts, some native shrubs (eg Bursaria spinosa, Dodonaea viscosa and Allocasuarina verticillata), native and exotic grasses and woody weeds including blackberry.


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The quarry is accessing material from the northern side of the hill which is not naturally steep, as opposed to the section of hillside to the eastern side of the Mining Lease which is steep (the latter being the area identified by the Hazard Bands). There is evidence of previous (historic) quarry workings in an area along the Access Road (stockpiled coarse rock, unnatural markings and shaping of the dolerite embankment), but this is outside the Mining Lease.

As the quarry activity does not require blasting it is very unlikely that the activities of ripping and crushing will materially affect the stability of the slope to the eastern side of the Mining Lease. Furthermore, the slope above the Access Road is well vegetated with shallow and deep rooted annuals and perennials and shows no evidence of slumping or rockfall (either recent of historical). The quarry operator will continually assess the slope for evidence of slumping and rockfall during periods of operation and seek advice from a suitably qualified person/company if either event occurs.

Plate 3. Images of Geology and Steep Areas

A

Access Road looking south to Lyell Highway with steep but vegetated embankment on the eastern side of the quarry.

B

Embankment created by the installation of the Access Road showing Triassic sandstone underlying the Jurassic dolerite.

SURFACE WATER DRAINAGE

The well drained nature of the dolerite itself enables water (rainfall) to quickly drain through the quarry floor. Only during periods of heavy or sustained rainfall does ponding occur in the quarry with very infrequent periods of runoff from the quarry floor. A small informal sediment pond at the northern extent of the Mining Lease captures runoff when it does occur, however there is no evidence that this pond actually fills or even holds water (Plate 4A) – this may simply reflect the low rainfall of the area such that there is rarely any water accumulation of sufficient magnitude to flow into the pond. If the pond did fill it would drain into the adjacent pasture (to the north of the Mining Lease).


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The Access Road is drained by a spoon drain system (western side of road) and then into a dam adjacent to Johnnys Creek via a culvert under the Access Road (Figure 2). The ‘lip’ of the Access Road near the car parking area (Plate 4B) splits the flow of water into the quarry and spoon drain. Currently, part of the quarry floor drains into the spoon drain of the roadside because it extends past the ‘lip’ into the quarry. To prevent drainage out of the active quarry down the roadside, the spoon drain that leads into the quarry floor beyond the Access Road ‘lip’ will be filled ‐ all water from the quarry floor will be directed back into the quarry, with none exiting via the Access Road spoon drain. The roadside spoon drain will continue to collect and divert water down the roadside into the dam adjacent to Johnnys Creek.

Plate 4. Key water management features in the quarry

A

Informal sediment pond at the northern edge of the Mining Lease.

B

Access Road ‘lip’ (yellow arrow) which creates a catchment boundary to the flow of water into the quarry floor and the roadside spoon drain. The spoon drain (red arrow) will be filled back to the ‘lip’ to prevent water from the quarry floor flowing into the roadside spoon drain.

QUARRY PLANS

Existing Layout The approximate current layout of the quarry is shown in Figure 6a. The layout will not be altered significantly despite an increased production level as the pit is constrained in both its size and direction of quarrying by the adjacent high voltage power lines (south of the current face, Figures 6a and 6b). The quarry is accessed by an Access Road off the Lyell Highway (Figure 6c). A small informal settling pond at the north‐east of the quarry captures runoff when it does occur, however there is no evidence that this pond actually fills or even holds water (Plate 4A). Some water that accumulates on the quarry floor would flow down the spoon drain system associated with the Access Road, where it would eventually flow into a farm dam adjacent to Johnnys Creek (Plate 4B).

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Windsors Quarry - EERFigure 6a: Existing Quarry Layout

1889P/M

ACCESSROAD

MININGLEASE

TRANSMISSIONLINES

TRANSMISSIONLINE TOWER

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#QUARRYFACE

SOILBUND

CARPARKINGMACHINERYSTORAGE

QUARRYCATCHMENTBOUNDARY

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Windsors Quarry - EERFigure 6b: Proposed Quarry Layout


ACCESSROAD

MININGLEASE

TRANSMISSIONLINES

TRANSMISSIONLINE TOWER

QUARRY AREA AT NEWBENCH LEVEL (5m BELOWPRESENT QUARRY FLOOR

QUARRIED ATPRESENT BENCHLEVEL

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FINAL QUARRYFACE (APPROX)

SEDIMENT POND(QUARRY FLOOR DRAINAGETO BE DIRECTED TO THIS POND)


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Proposed Layout

The Access Road will be retained as it provides the best possible route from the Lyell Highway into the quarry. Within the quarry the car parking area, machinery laydown area and soil bunding will remain in their current locations until such time they need to be relocated due to the development of the second bench.

The quarry floor itself will form a component of water control measures and sediment control in the quarry – when possible a void or collection area will be maintained by slightly sloping the floor back towards the face to enable water to firstly pool within the quarry floor before it accumulates enough to cause surface flow to the sediment pond2.

The ‘lip’ of the Access Road near the car parking area (Plate 4B) splits the flow of water into the quarry and spoon drain. Currently, part of the quarry floor drains into the spoon drain of the roadside because it extends past the ‘lip’ into the quarry. To prevent drainage out of the active quarry down the roadside, the spoon drain that leads into the quarry floor beyond the Access Road ‘lip’ will be filled ‐ all water from the quarry floor will be directed back into the quarry, with none exiting via the Access Road spoon drain. The roadside spoon drain will continue to collect and divert water down the roadside into the dam adjacent to Johnnys Creek.

The sediment pond at the northern extent of the Mining Lease will be formalised to have an appropriate inflow and outflow location3. The drainage around the quarry face will also be formalised such that all water draining around the active quarry area will be directed to natural locations4 (Figure 6e). The catchment of the sediment pond will be approximately 1.7 hectares. Water from rainfall and drainage in the sediment pond catchment will be directed to the sediment pond (Figures 6b and 6e) which has been sized to accommodate the 1 in 20 year rainfall event.

A rainfall runoff and sediment capture assessment was prepared by Hydrodynamica (Appendix ) which contained the following recommendations ‐

‘…in order to prevent the ‘design 1 in 20 year rainfall event’ from spilling to the receiving environment without an effective sedimentation phase, it is recommended that the quarry have at least 952 KL (m3) of volumetric capacity. This may be achieved through a combination of (i) maintaining a void which collects water (and sediment) within the quarry or quarry floor and (ii) the maintenance and expansion of the existing sediment pond on the site which can be dug deeper as the quarry floor is dropped to the next bench. Alternatively, the sediment pond could be sized to the full 952 KL and receive all water from the quarry without any water being retained within the quarry floor itself.’

Topsoil will continue to be stockpiled at its current storage location until the area is quarried. At that time the stockpiled topsoil will be moved to an area that has been quarried for use in progressive rehabilitation works.

2 Commitment 2: When possible a void or collection area will be maintained by slightly sloping the floor back towards the face to enable water to firstly pool within the quarry floor before it accumulates enough to cause surface flow to the sediment pond. 3 Commitment 3: The sediment pond will be formalised to have an appropriate inflow and outflow location. 4 Commitment 4: Drainage around the quarry will be formalised such that all water draining around the active quarry area will be directed to natural locations.


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Quarry Extraction Plan

The strategy for gravel extraction is to develop a second bench (Area 2) when the limit of the current face (Area 1) is reached (Figure 6d). The extent of the current face is limited by the position of a high‐voltage power line (Plates 1A and B). This approach to quarry extraction minimises the overall footprint of the quarry (enables the disturbed area to be kept small) and enables the same infrastructure to be utilised when the bench is opened including the car parks, Access Road and sediment pond.

High Voltage Transmission Line Management

The quarry is adjacent to the high voltage electricity transmission tower number 161 and overhead conductors for the 220 kV line from Liapootah to Chapel Street. The quarry face will not be moving any closer to transmission towers existing on the property (Figure 6a) and therefore the proposal does not involve any change to the location of the quarry face relative to the transmission line tower 161 to the south.

All work near transmission lines will be in accordance with Work Cover Tasmania’s safety publication, ‘A guide to working near overhead power lines’5 (Appendix 5). Access to the easement and all structures will be available at all times to TasNetworks and dust emissions from the quarrying activity within the easement must be controlled.

The following TasNetworks conditions will be applied at the operation6:

1. No chemicals, fuels, oils or other flammable materials will be stored within the transmission line easement. No vehicle refuelling will occur within the transmission line easement;

2. The current height of the soil bund along the NW side of the quarry (Figure 6a), within the transmission line easement, will not be increased;

3. The informal settling pond to be upgraded and used for the quarry intensification will be located wholly outside the transmission line easement; and

4. All vehicles to access the site travelling under the transmission lines meet required safety clearances.

If any of the above circumstances change, TasNetworks be consulted to ensure the safe and reliable operation of the electricity transmission assets in this location is not jeopardised7.

5 Commitment 5: All work near transmission lines must be in accordance with Work Cover Tasmania’s safety publication, ‘A guide to working near overhead power lines’ 6 Commitment 6: The TasNetworks issued conditions will be applied at the operation:

1. No chemicals, fuels, oils or other flammable materials will be stored within the transmission line easement. No vehicle refuelling will occur within the transmission line easement;

2. The current height of the soil bund along the NW side of the quarry (Figure 6a), within the transmission line easement, will not be increased;

3. The informal settling pond to be upgraded and used for the quarry intensification will be located wholly outside the transmission line easement; and

4. All vehicles to access the site travelling under the transmission lines meet required safety clearances. 7 Commitment 7: TasNetworks will be consulted if any of the operational processes change at the quarry from those described in this report to ensure the safe and reliable operation of the electricity transmission assets in this location is not jeopardised.


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PART D ‐ POTENTIAL ENVIRONMENTAL EFFECTS

FLORA AND FAUNA

An ecological assessment has been made of the site (including the section of Johnnys Creek to receive treated stormwater from the quarry) and no threatened flora, fauna or ecological communities are present.

The recorded location of Pterostylis wapstrarum (Figure 7) is an old record dating to the 1840’s and is ‘presumed extinct’ by the Department of Primary Industries, Parks, Water and Environment in this location. No further consideration was given to this species or recorded location as the vegetation in the Mining Lease is highly modified with an abundance of native species – it also has a long history of having been stock grazed and fertilised.

There are likely to be negligible impacts to flora and fauna as the active quarry operations are in pasture used for livestock grazing (Figure 8). The only native vegetation within or near the Mining Lease is Acacia – Bursaria woodland (TASVEG – NBA) which will not be affected by the quarry activities. The south‐eastern side of the Mining Lease supports white gum (Eucalyptus viminalis) trees over weed infestation of hawthorn, English broom, blackberry, briar rose and elderberry (Plate 5A and B) while most of the Mining Lease is agricultural land (Plate 5C). In drier areas on sandstone outcropping the understorey is grassy (exotic and native species) with emergent regrowth white gum (Plate 5D).

Plate 5. Images of the vegetation in and near Windsor’s Quarry

A

Weed infestation with emergent white gum (Eucalyptus viminalis) within the Mining Lease

B

Hawthorn ‐ Willow infested Johnnys Creek

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Austrostipa nodosa

Anogramma leptophylla

Pterostylis wapstrarumPerameles gunnii

Perameles gunnii

Perameles gunnii Perameles gunniiPerameles gunnii

Perameles gunnii

Perameles gunnii

Perameles gunnii

Perameles gunnii

Perameles gunnii

Perameles gunnii

Perameles gunnii

Perameles gunnii

Perameles gunnii

Perameles gunnii

Perameles gunnii

Perameles gunnii

Perameles gunniiPerameles gunnii

Tyto novaehollandiaeTyto novaehollandiae


Sarcophilus harrisii

Sarcophilus harrisiiSarcophilus harrisii

Sarcophilus harrisiiSarcophilus harrisiiSarcophilus harrisii




498000 499000 500000 501000 502000 503000 504000526

5000

526600

0526

7000

526800

0


CLIENT: MSDDATE: 5th MAY 2014Base data by TASMAP. © State of Tasma niaBase image by TASMAP. © Sta te of Tasmania

³0 500 1,000250 Meters

Windsors Quarry - EERFigure 7: Natural Values Atlas data for threatened species

# NVA Fauna Records# NVA Flora Records


NEWNORFOLK

501000 501100 501200 501300 501400526

6400

526650

0526

6600



³0 50 10025 Meters

Windsors Quarry - EERFigure 8: Vegetation in the Mining Lease


ACCESSROAD

MININGLEASE

TASVEG 3.0ENTIRE AREA IS CODEDFAG - Agricultural LandCORRECT IN PASTURE

VEGETATION NOTED ON SITENBA - Bursaria - Acacia woodland and scrub

QUARRY AND ROADS AREFUM - Extra-urban miscellaneous

VEGETATION NOTED ON SITEFWU - Weed infestationWITH EMERGENT WHITE GUM


16

C

Improved pasture around the quarry is of poor quality owing largely to shallow soils and low annual rainfall

D

Regrowth white gum over an understorey of pasture and native grasses and woody weeds occurs in the dry areas adjacent to the Access Road

WEEDS

Weeds are managed at the quarry via an informal weed spraying program which will be formalised (i.e. Weed Management Plan) as part of this project. Notable weeds within or directly adjacent to the active quarry are horehound, Californian thistle and slender thistle while the Access Road has adjacent stands of English broom, slender thistle and horehound (Figure 9).

A Weed Management Plan has been prepared for the quarry (Appendix 3) and will be implemented as part of the expanded operation8.

RIVERS, CREEKS, WETLANDS AND ESTUARIES

The quarry (Mining Lease) occurs within the Johnnys Creek catchment (Figure 5a). The tributary will remain unaffected by the operation; there will be no impoundments built on it or alterations made to its course.

SURFACE AND GROUNDWATER MANAGEMENT

The sediment pond at the northern extent of the Mining Lease will be formalised to have an appropriate inflow and outflow location. The drainage around the quarry face will also be formalised such that all water draining around the active quarry area will be directed to natural locations (Figure 6e). The catchment of the sediment pond will be approximately 1.7 hectares when the quarry is extracting the second bench. Water from rainfall and drainage in the sediment pond catchment will be directed to the sediment pond (Figures 6b and 6e) which has been sized to accommodate the 1 in 20 year rainfall event (Appendix D).

8 Commitment 8: A Weed Management Plan has been prepared for the quarry (Appendix 3) and will be implemented as part of the expanded operation.

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501000 501100 501200 501300 501400526

6400

526650

0526

6600



³0 50 10025 Meters

Windsors Quarry - EERFigure 9: Declared Weeds in Mini

environmental effects report - epa.tas.gov.au constructions... · appendix 5 a guide to working...

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