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Mineral Sites Plan 2019 Sustainability Appraisal Main Report

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Mineral Sites Plan 2019 Sustainability Appraisal Main Report Purbeck Stone: PK17 Home Field, Langton Matravers Assessment (February 2018) Site Area : approximately 10.5 ha Updated Site Area approximately Nominee: National Trust 8.5ha, but no more than 1ha of land Site Name/Location : Agent : Land and Mineral Management (in addition to areas already being PK17 Home Field, Langton worked) expected to be worked Local Authority : Purbeck District Council Matravers during the life of the Plan. Mineral Type : Purbeck Stone Production : 2,000 tpa Reserve : approximately 340,000 tonnes Impact Assessment Scoring Strong Minor Minor - Strong Positive Negligible or Negative - Negative + Positive ++ 0 ? Uncertain - Impact No Effect Impact Impact Impact Timescales for effects: P/W: Preparation and Working R/A : Restoration and Afteruse Sustainability Effects Commentary Mitigation Objectives P/W R/A 1. To move waste • This Objective is not relevant to this site management N/A N/A • N/A nomination up the waste hierarchy European/International Designations • No impacts expected. • Ensure appropriate 0 0 stand-off is included. • Suitable stand-off to protect the SAC grassland immediately to the west will be required. 2. To maintain, Annex 1 Bird Species conserve and 0 0 • No action required. • enhance No impacts expected. biodiversity National Designations 0 0 • No action required. • No impacts expected. Protected species 0 0 • No action required. • No impacts expected Page 289 of 583 Sustainability Effects Commentary Mitigation Objectives P/W R/A Local recognitions/designations, including 0 0 ancient woodland and veteran trees • No action required. • No impacts expected • The Purbeck limestone group has an important • association with the geology of the Jurassic Note potential for Coast World Heritage Site. Working quarries in quarries to yield Purbeck have been known to yield important fossils or other fossils, including dinosaur footprints. They are material of also of ongoing interest for the study of early geodiversity interest. 3. To maintain, Cretaceous stratigraphy. • Visits or other conserve and • investigation of + + ? These interests should be acknowledged with the enhance assumption that geologists and the Jurassic working sites may be geodiversity. Coast Team hosted by DCC will respond requested. positively to any opportunities to recover fossils • Investigate potential or record and study unusual features if they are and/or benefits of discovered. In terms of geodiversity there is a leaving quarried face presumption in favour of an appropriate level of open after quarrying activity continuing in order to sustain restoration. these ongoing interests. • Hydrological assessment required Groundwater to determine possible impacts, on ground and surface waters, with _ • Impact would vary from ‘Less appropriate mitigation to be Significant Adverse Impact’ to implemented. ‘Significant Adverse Impact’ • Appropriate arrangements should 4. To maintain, depending on determined impact for be put in place to ensure that the conserve and 0 the groundwater spring issues rising water leaving the site and entering enhance the 80 m to the west of the site. These the watercourses or groundwater quality of springs must be protected. is of an acceptable quality. ground, • Site overlies Secondary aquifers. No _ _ • surface and impact on Source Protection Zones. Any fuel on site should be sea waters No licenced supplies. properly stored to avoid and manage contamination in case of spillage. the • Appropriate arrangements should consumption be installed for surface water and of water in a silt collection and fuel storage to sustainable prevent contamination of way. Surface Water groundwater resources. • There are watercourses/springs to ? 0 • The combined impacts of Purbeck the west of the site, nearest is Limestone Quarries should be approximately 80 m from the site. assessed where a number of sites affect the same water resource or receiving water course. Page 290 of 583 Sustainability Effects Commentary Mitigation Objectives P/W R/A 5. To reduce Flooding/Coastal Stability flood risk and 0 0 • • No action required. improve flood Site is entirely in Flood Risk Zone 1, no risk of management. flooding. Archaeology • There is a Scheduled Monument to the west of • Archaeological survey the site (SM33164 – ‘Pillow mound 145m south of the area required as east of Eastington Farm’). part of planning application to assess • The discovery of Iron Age and Roman period possible presence and remains at the Blacklands site to the east and significance of non- north-east of the site indicates the present site’s designated remains high potential for below-ground archaeology. and to assess • There is also potential for industrial whether/how these archaeological evidence of early quarrying. should be protected ? 0 Archaeological assessment (including of the during working – no impact on the setting of SM33164 and other further work required 6. To maintain, Scheduled Monuments in the area) and at site allocation conserve and evaluation would be required before an stage. enhance the informed planning decision could be made. historic • All necessary • environment Archaeological assessment and evaluation mitigation to be (including would be required before an informed planning implemented prior to archaeological decision could be made. Only when these have working. been undertaken would the archaeological sites, historic • Adequate provision to impact be understood – at present it could be buildings, be made for anywhere from ‘Very Significant’ to ‘No conservation preservation, Significant’ impact. areas, historic excavation or parks and recording, as Historic Landscapes gardens and appropriate. other locally • The local landscape bears the imprint of • Further consideration distinctive previous quarrying dating from the Roman to be given to features and period onwards. It could be argued that the ? 0 restoration proposals, their settings). present site would be a continuation of the in terms of historic process, and if the site is to be restored landscapes. afterwards the impact would be limited in time anyway. Historic Buildings • This site is part of a characterful landscape of • Heritage Assessment which the quarrying activities help to form its required to assess character. Buildings are not immediately _ 0 level of impact and adjacent to the site but derive character from identify appropriate the overall landscape. mitigation • The quarry will have no significant impact on the listed buildings. Page 291 of 583 Sustainability Effects Commentary Mitigation Objectives P/W R/A • Potential impact on Acton Conservation Area and its setting Landscape Capacity • This site is primarily within the zone of least landscape and visual impact so it will be how the area is worked which will determine its _ 0 capacity. 7. To maintain, • Small areas, quantities, progressive restoration conserve and and in short campaigns with low stockpiles is enhance the recommended. • Site to be developed landscape, as suggested to including Designated Landscapes minimise impacts. townscape, • This site is primarily within the zone of least seascape and landscape and visual impact, resulting is a less the coast. significant adverse impact for most of the _ 0 proposed site. • The boundary of the site has been pulled back to remove the south-western corner of the site which was outside the zone of least landscape and visual impact. • Impacts on air quality expected to be negligible. • No AQMAs will be affected by the working of this 8. To protect site proposal. Any dust resulting from working • Environmental and improve will be controlled through normal dust- protection measures to air quality and 0 0 suppression measures. reduce dust and ensure reduce the noise is appropriately impacts of • Noise mitigation will be addressed at the mitigated. noise. planning application stage, with appropriate mitigation to be included in the development of the site. • Soils are somewhere between good to • Soil to be properly 9. To maintain, moderate to very poor. Any soil removed will stripped and stored conserve and be protected during working and either re-used prior to working; _ 0 enhance soil on site or taken elsewhere to be used. Further protected during quality. assessment may be required to determine soil working; and re-spread quality. on site after working. Page 292 of 583 Sustainability Effects Commentary Mitigation Objectives P/W R/A • No specific action required; site 10. To conserve • The site would make an important contribution development to take and safeguard + + 0 to the supply of Purbeck Stone for Bournemouth, into consideration mineral Dorset and Poole and all other potential markets. relevant impacts and resources. mitigate where appropriate. 11. To promote the use of • This proposal does not promote the use of _ 0 • No action required. alternative alternative materials. materials. • Development of this site would provide a 12. To provide an benefit in terms of contributing to the provision • Ensure principles of adequate and of a supply of minerals to meet society’s needs. sustainable affordable • Ensuring a sustainable supply will depend on development are supply of + 0 the development and management of the site. incorporated into the minerals to Providing site development takes into account development of this meet society's relevant principles of sustainable development site. needs. it is expected this will contribute to complying with this objective. • This site proposal is expected to contribute to economic development on two levels – directly
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