West Cumbria Water Supply Project | Environmental Statement
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West Cumbria Water Supplies – Thirlmere Transfer United Utilities Plc Environmental Statement Volume 4 Appendix 23.1: Mitigation Schedule Revision | 0 24 March 2016 West Cumbria EIA Environmental Statement - Mitigati on Pr opos al United U tilities Plc Environmental Statement Volume 4 Appendix 23.1: Mitigation Schedule West Cumbria Water Supplies – Thirlmere Transfer Project no: B2707061 Document title: Environmental Statement Volume 4 Appendix 23.1: Mitigation Schedule Revision: 0 Date: 24 March 2016 Client name: United Utilities Plc Jacobs U.K. Limited 5 First Street Manchester M15 4GU United Kingdom T +44 (0)161 235 6000 F +44 (0)161 235 6001 www.jacobs.com © Copyright 2015 Jacobs U.K. Limited. The concepts and information contained in this document are the property of Jacobs. Use or copying of this document in whole or in part without the written permission of Jacobs constitutes an infringement of copyright. Limitation: This report has been prepared on behalf of, and for the exclusive use of Jacobs’ Client, and is subject to, and issued in accordance with, the provisions of the contract between Jacobs and the Client. Jacobs accepts no liability or responsibility whatsoever for, or in respect of, any use of, or reliance upon, this report by any third party. Environmental Statement Volume 4 Appendix 23.1: Mitigation Schedule Contents 1. Introduction 2. Landscape and Visual Amenity 3. Arboriculture 4. Water Environment 5. Flood Risk 5.1 Flood Risk to the development 5.2 Flood Risk from the development 6. Ecology 6.1 Construction 6.2 Operation 7. Cultural Heritage 7.1 Archaeology 7.1.1 Construction Phase 7.2 Built Heritage and Historic Urban Landscape 7.2.1 Construction 7.2.2 Operation 7.3 Historic Hedgerows 7.4 Historic Landscape 7.4.1 Construction 7.5 Intangible Cultural Heritage and Associations 7.5.1 Construction 8. Soils, Geology and Hydrogeology 8.1.1 Construction Phase 8.1.2 Operation Phase 9. Materials and Waste Management 10. Public Access and Recreation 11. Socio-Economics 12. Agriculture 12.1 Pre-Commencement and Construction Phase 12.2 Soil Management Strategy 13. Traffic and Transport 14. Noise and Vibration 15. Air Quality and Odour Environmental Statement Volume 4 Appendix 23.1: Mitigation Schedule 1. Introduction 1) The following appendix summarises the mitigation proposals which are presented in Volume 2 of the ES. The mitigation proposals have been collated from each of the technical chapters. While the appendix captures the mitigation proposals as they presently stand, it is acknowledged that some may continue to evolve and be further enhanced during the planning determination process and in the development of planning conditions, should the planning authorities be minded to approve the application. 2) The mitigation schedule links into an Environmental Masterplan for the Proposed Scheme (Appendix 23.2). The Masterplan comprises a series of drawings illustrating the locations at which both generic and site- specific mitigation measures are proposed. 3) The mitigation schedule is presented according to EIA topic areas, and follows the same order of topics as presented in the ES. Environmental Statement Volume 4 Appendix 23.1: Mitigation Schedule 2. Landscape and Visual Amenity Receptor/ Scheme Component/ Construction Stage/ activity Mitigation Scheme-wide • Reduce tree loss – Designers and contractors to seek to reduce tree loss within the working width, where practicable. For example alter the proposed fence line in particular sections to reflect root protection areas identified in Volume 2 Chapter 8, Volume 3 Figures 8.1 – 8.3 and Volume 4 Appendix 8 • Topsoil and subsoil reinstatement - Overfilling within excavation areas during reinstatement to allow for future settlement of reinstated soils. Specification is included in a Construction Strategy, Volume 4 Appendix 4. • Tree protection – Where practicable work within the requirements of BS 5837:2012 • Soil Storage - Adhere to the Outline Soil Management Strategy presented in Volume 4 Appendix 4. Scheme-wide • Grass Sward/ Species rich grassland - Seeding specification should be standard grass mix, special mixes to be agreed with individual landowners, over-seeding to be by agreement only • Planting near underground assets and pipelines – offset planting should follow United Utilities document ‘Standard Conditions for Works Adjacent to Pipelines’ (July 2015) • Soft landscape planting proposals - all plants to be bare root stock or in some cases container grown e.g. Ilex aquifolium - holly, Pinus sylvestris - Scots pine • Hedgerow protection - to be 1.6 m high post and rail fence, with cattle and rabbit proof netting. Scheme-wide • Individual trees / Hedgerow trees - Native tree species to be planted as standard stock, bare root, 8-10 cm girth, 250/300 cm height, 2.0 m clear stem. Trees located within existing hedgerows should be planted with timber supporting stake(s) • Woodland belts/ woodland - Plant protection should be achieved by individual tree/shrub guards or deer proof fencing • Dry stone walls - Photographic record should be undertaken to enable reinstatement to original built style and character. Would vary throughout the scheme. Scheme-wide • Watercourses - Reinstatement of riparian species/trees to be agreed with Ecological Clerk of Works • Planting over pipeline if feasible for bank stability, geotextile matting • Residual construction equipment /areas - Temporary fencing, hardstanding areas for laydown areas and access tracks to be removed as part of contract. No residual construction items to remain. Environmental Statement Volume 4 Appendix 23.1: Mitigation Schedule Receptor/ Scheme Component/ Construction Stage/ activity Mitigation RWA • Replacement tree planting • Reinstatement of hedgerows and woodland • Reinstatement of watercourses • Reinstatement of dry stone walls. Proposed WTW • Screen earth bunding • Proposed green roof • Strengthening of existing hedgerows • Screen planting woodland and woodland edge. Moota Hill SR • Screen planting (woodland belt and shrub planting) • Proposed hedgerow planting • Re-profiling Network Main - Proposed WTW to Quarry Hill • Replacement tree planting • Reinstatement of dry-stone walls • Reinstatement of hedgerows and woodland • Reinstatement of watercourses. Harrot Hill PS • Screen planting (tree and shrub planting) • Proposed hedgerow planting • Strengthening of existing hedgerows. Network Main – Proposed WTW to Summergrove (including • Replacement tree planting High Leys to Kelton Fell and Cockermouth to Broughton • Reinstatement of dry-stone walls Cross) • Reinstatement of hedgerows and woodland • Reinstatement of watercourses. High Leys SR and PS • Rebuilding of dry-stone walls • Strengthening of existing hedgerows • Screen earth bunding and re-profiling. Slip-lined sections Broughton Cross to Stainburn Service • Reinstatement of hedgerows. Reservoir and Cockermouth to Cornhow Environmental Statement Volume 4 Appendix 23.1: Mitigation Schedule 3. Arboriculture Receptor/ Scheme Component/ Construction Stage/ activity Mitigation Scheme Wide – Construction • It is important that measures for protection are in place throughout the scheme and for as long as a risk of damage remains. Particular care and planning is necessary in the operation of excavators, lifting machinery and cranes so all vehicle movements and lifting operations will not impact on retained trees • The retained trees should be adequately protected by stout fencing, ‘fit for purpose’ and preferably as prescribed in section 6.2 of British Standard 5837: 2012 to provide an adequate RPA that will allow its successful retention within the development • The RPA should be regarded as sacrosanct and the fencing should be installed prior to construction works, and plant and machinery arriving on site. The fencing should remain intact throughout the duration of the scheme and only be removed upon completion. The position of the fencing around the trees should be shown on the tree protection plan (TPP) once the scheme layout has been finalised • During construction there should be no materials stored or dumped and no vehicular or plant movement within the RPA to minimise the risk to the trees from soil compaction. Where compaction has occurred advice should be sought from an arboriculturist and a structural engineer on decompaction methods. This is in accordance with Section 8.4 of BS5837:2012 • All site storage areas, cement mixing and washing points for equipment and vehicles and fuel storage areas should be outside RPAs unless otherwise agreed with the LPA. No discharge of potential contaminants should occur within the RPA of a retained tree stem or where there is a risk of run off into RPA • Excavations within the root protection area should be avoided. However, if excavations are necessary, works should be limited to the use of hand tools. Great care should be taken to preserve and work around roots greater than 25 mm in diameter and clusters of smaller roots avoiding damage to bark. Where it is necessary to sever roots greater than 25 mm in diameter, advice from an arboriculturist should be sought. Where smaller roots must be severed they should be cut back using secateurs or a sharp pruning saw • Where construction working space or temporary construction access is justified within the RPA, this should be facilitated by a setback in the alignment of the tree protection barrier. Where the set-back of the tree protection barrier would expose unmade ground to construction damage, new temporary ground protection should be installed as