EIS 918 Rock Flat Hard Rock Quarry
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EIS 918 Rock Flat hard rock quarry: environmental impact statement: prepared by Kinhill Engineers I S DEPT PRIMARY LYRISTRIES ... ABO1 9666 I I I I I d I [1 I I I I I I I I I I L KI1IULL Mr and Mrs R. Snowden ki V Prepared by: Kirihill fligineers Pty Ltd 100 Hardwick Crescent, HOLT ACI' 2615 Tel. (062)541 444; Fax. (062)541 2444 Septaber 1988 C85005 ROCK FIAT HARD ROCK QUARRY ENVIRONMENTAL IMPACT STATEMENT CLAUSE 59 CERTIFICATION This is to certify that the Environmental Impact Statement set out herein has been prepared in accordance with Clauses 57 and 58 of the Environmental Planning and Assessment Regulation, 1980. MSc, MRTPI, MRAPI (:M:anager nvironment and Planning, Canberra nhiluc Engineers Pty Ltd September 1988 I;t1:i1I4ii IN'IRCIXXTION 1.1 The Proposal 1 1.2 Background 1 1.3 Objectives of Environmental Impact Statement 1 SURY 2.1 Description of the Proposal 2 2.2 Consideration of Alternatives 2 2.3 Description of Existing Environment 3 2.4 Assessment of Environmental Impact 3 2.5 Justification of Proposal and Consequences 4 of not Undeitaking Development 2.6 Mitigating Measures 4 2.7 Concluding Remark 5 I 3.1 Aim 6 3.2 Property Description 6 3.3 staging of Development 6 3.4 Extraction of Material 6 3.4.1 Type of Material 6 3.4.2 Area and Quantity of Excavation 6 3.4.3 Method of Extraction 6 3.5 Haulage of Material 7 3.6 Visual Concept 7 3.7 Final Form of Quarry 8 3.8 Hours of Operation 8 4. CONSIDERATION OF ALTERNPITIVFS 4.1 Alternative Sites 9 4.1.1 Use of Sites and Surrounding Areas 9 4.1.2 Access Infrastructure 9 4.1.3 Distance from Demand Points 10 4.1.4 Comparison of Alternatives 10 4.2 Alternative Forms of the Site after Quarrying 10 4.3 Conclusion 11 I KIWNILL 1 PNE 5. DSQUFIcX OF EXISTI I ' 5.1 Regional Context 12 5.2 Topography 12 5.3 Soils 12 5.4 Hydrology 13 5.5 Vegetation 13 I 5.6 Gou1burn-Borrala Railway 13 5.7 Land Use 14 5.8 Zoning 14 5.9 Planning Proposals 14 I 5.10 Water Quality 15 ' 5.11 Users of and Demand for Hard Rock Product 15 5.12 Sources of Hard Rock Product 16 6. ASSESSMENT OF ENVIRO4EN1!AL IMPACr 6.1 Issue Overview 18 6.2 Visual Impact Assessment 18 6.3 Soil Erosion 20 I 6.4 Water Quantity and Quality 20 6.5 Truck Movements 20 6.6 Noise and Dust 23 I 6.7 Rail Movements 23 6.8 Energy Consumption 23 6.9 Other Issues 24 I 7. JUSTIFIC1VFION OF PROPOSAL AND CX)NSEQUECFS OF NOT UNDERAKING DEVELOPNENT I 7.1 Justification of the Proposal 25 7.2 Consequences of not Undertaking Develonent 25 8. MITIGNFTh& NEASUPES 8.1 Visual Impact 26 8.2 Soil Erosion and Water Quality 26 8.2.1 Diversion of Flows Around the Quarry Area 26 8.2.2 Sediment Traps 27 I 8.2.3 Extraction of Material 27 8.2.4 Protection of Cut Faces 27 8.3 Truck Movements 27 I 8.4 Dust 28 8.5 Archaeology 28 8.6 Rail Movements 28 I REREES AND BIH[IIOGRAPHY APPENDICES I Requirements of Director of Department of Planning Responses from Public Authorities I Department of I1ain Roads - Grading Tests from Rock Flat Quarry 1. 1.1 The Prc*osa1 Mr R. Snowden proposes to continue using the hard rock quarry on Portion 87 County of Beresford, Parish of Gladstone next to Mnaro Highway about 14 kilometres south of Cooma at Rock Flat. (See Figure 1) Demand for material from the quarry exists with the Department of Main Roads of New South Wales, Cooma Office, Snowy River Shire Council and Cooma-Monaro Shire Council. The quarry will also supply such local demand for hard rock as arises. 1.2 The quarry has been in use for many years, originally it was used for supply of railway ballast for the Goulburn-Bombala railway line. The previous owner conducted minor surface quarrying up until 1983. The proposal site was purchased by Mr R. Snowden in 1983 and since then quarrying activities have been undertaken by Department of Main Roads of New South Wales under Permit to Enter and Royalty Agreements for gravel. Thirty thousand cubic metres of gravel has been reirved from the quarry in the past five years. 1.3 thjectives of Envirorunta1 Inpact Statnt The objectives of the environmental impact statement (EIS) are to: * state the objectives of the proposed works * describe the proposal * consider alternatives to the proposed works * assess the impact of the proposed works on the environment * determine whether the proposed works are justified on environmental, economic and social grounds * outline the consequences of not proceeding with the proposed works * identify measures that will be incorporated into the proposed works to protect the environment. 1. 1•' Legend £/8A A 6A - MAJOR EOADS fJ L co I \ ro POUR E SOWV I/ I Figure 1 \ LOCATION PLAN (I KILOMETRES Lc 0 1 2 3 1 5 6 P A TO ROCK FLAT QUARRY '1 feocA FZA ENVIRONMENTAL IMPACT QOA2ev STATEMENT ( COOMA-MONARO SHIRE 9i ' ) 4/ KIIIIULL i;L1ii11LI! 2. SURY 2.1 Description of the Proposal Mr R. Snowden proposes to continue using the hard rock quarry on Portion 87 County of Beresford, Parish of Gladstone, next to Monaro Highway approximately 14 kilaretres south of Coana at Rock Flat. (see Figure 2) Excavation will take place from a rocky knoll situated in the north-west corner of the site between the Goulburn-Borribala railway and the western boundary. The site will be excavated to a depth of approximately 20 metres. Up to 600,000 cubic metres of material will be obtained from the quarry. Bulldozers and front end loaders will be used to extract the material. Mobile crushing plant will be utilised to process the hard rock. The material will be loaded onto trucks for haulage off site or railway hoppers for transport to the VFT Project. Haulage routes will all use an existing access road and railway crossing to Monaro Highway at the extreme north west corner of the property. Monaro Highway is the major and only road route to sites north and south of the quarry. Material may be transported along the existing Goulburn-Banbala railway to the VFT Project. Quarrying will start on the south-western side of the rocky knoll and progressively remove material, retaining undisturbed faces visible from the monaro Highway until such time as portions of the undisturbed faces become quarried. The remainder of the site will be restored to grazing land after the completion of quarrying. Extraction of material could extend over a period ranging from ten to thirty five years, depending on the level of demand for the crushed rock product. 2.2 Consideration of Alternatives There are many potential sites with similar material to }ck Flat in the Monaro District. Distance from demand points, access infrastructure and the use of site and surrounding areas are determining factors in assessing suitable alternative sites. The Monaro Plain is rural and introduction of further extractive industry would adversely impact on surrounding areas and minor roads. Increasing the distance of the quarry site from Coana will affect the share of the hard rock product market in the Monaro district and positive benefits would not accrue to the Coana residential amenity. 2. EXIST/A/C COAJTOU.eS AT /O,r? //VT'VALS A 1CA TO 5E EXCA VA TED OUiVDAQ' cjg GRID GATE VA TEe COURSES \01 "m~m a CREEis r 1'11 ABAAIDOAIED QUA .€/ES Figure 2 LOCATION PLAN EXISTING FEATURES METRES 0 1002003001.00500 600 ROCK FLAT QUARRY ENVIRONMENTAL IMPACT STATEMENT COOMA-MONARO SHIRE KIIIIULL I KuthiLL 1 Access to high quality roads is fundamental and many alternative sites lack this attribute. I Those alternative locations within the MDnaro district have advantages and disadvantages when caripared with the proposed site. None of the advantages is sufficiently significant for I an alternative to be favoured in place of the subject site. Use of the site after quarrying is limited to return to I grazing due to the benefits obtained from the nodified landform. 2.3 Description of Existing Environment The quarry site occupies part of the side slopes of the Spring Creek valley and varies in elevation from 910 metres I AHD to 940 metres AHD. The quarry site is a rocky knoll with evidence of past surface mining and quarrying along benches. The surrounding area consists of undulating hills rising to 1030 metres AHD. The Spring Creek valley passes the site at 890 metres AHD to 880 metres AHD. Spring Creek and Rock Flat Creek converge downstream of the proposed quarry site. The site is situated within the extreme downstream catchment of Spring Creek and paxtially within the catchinent of Rock Flat Creek. Soils on the site are classified as Prairie soils, Plastic Clays and Black Earths. The site has been cleared and comprises improved grassland which is currently used for grazing sheep. The Goulburn-Bathala railway line enters the site from the north- western corner and exits at the south western corner. The railway reserve divides the site into the western component which includes the proposed quarry site and the eastern component which is used for grazing purposes. Land use around the site has a history of extractive industry. The land adjoining the site is zoned Rural lA and a 400 metre wide strip adjoining Monaro, Highway is zoned Rural lB.