COLNE ROAD BURNLEY COAL MINING RISK ASSESSMENT FOR MR. L. PLAISTER Earth Environmental & Geotechnical Ltd Houldsworth Mill Business & Arts Centre Houldsworth Street Stockport SK5 6DA Tel 0161 9756088 Report No. A1767/G/2 December 2016 Report Title: Colne Road, Burnley Coal Mining Risk Assessment Report Reference: A1767/G/2 Client: Mr. L. Plaister Issue Date: 21st December 2016 Drafted By: E Czarnecki Reviewed By: E Czarnecki A Czarnecki Authorised By: This document has been prepared for the titled project (or named part thereof) and should not be relied upon or used for any other project without an independent check being carried out as to its suitability and prior written authorisation being obtained from Earth Environmental & Geotechnical. Earth Environmental & Geotechnical accepts no responsibility or liability for the consequences of the use of this document, wholly or in part, for any other purpose than that for which it was commissioned. Any persons so using or relying upon this document for such other purpose do so at their own risk. This report was prepared for the sole use of the Client and shall not be relied upon or transferred to any other party without the express written authorisation of Earth Environmental & Geotechnical. It may contain material subject to copyright or obtained subject to license; unauthorised copying of this report will be in breach of copyright/license. The findings and opinions provided in this document are given in good faith and are subject to the limitations imposed by employing site assessment methods and techniques, appropriate to the time of investigation and within the limitations and constraints defined within this document. The findings and opinions are relevant to the dates when the assessment was undertaken, but should not necessarily be relied upon to represent conditions at a substantially later date. The findings and opinions conveyed in this report are based on information obtained from a variety of sources as detailed and which Earth Environmental & Geotechnical assumes to be reliable, but have not been independently confirmed. Therefore, Earth Environmental & Geotechnical cannot and does not guarantee the authenticity or reliability of third party information it has relied upon. Where opinions expressed in this report are based on current available guidelines and legislation, no liability can be accepted by Earth Environmental & Geotechnical for the effects of any future changes to such guidelines and legislation. The limitations of liability of Earth Environmental & Geotechnical for the contents of this document have been agreed with the Client, as set out in the terms and conditions of offer and related contract documentation. Earth Environmental & Geotechnical i Colne Road, Burnley Report No. A1767/G/2 December 2016 CONTENTS 1.0 INTRODUCTION ........................................................................................................................ 1 Appointment ................................................................................................................................ 1 Proposed Development .............................................................................................................. 1 Objective ..................................................................................................................................... 1 Sources of Information ................................................................................................................ 1 2.0 SITE LOCATION AND DESCRIPTION ...................................................................................... 3 3.0 ASSESSMENT OF DATA .......................................................................................................... 4 Geological Information ................................................................................................................ 4 Coal Authority Records ............................................................................................................... 5 Historical Records ....................................................................................................................... 5 4.0 COAL MINING RISK ASSESSMENT ........................................................................................ 6 Scope of Coal Mining Risk Assessment ..................................................................................... 6 Data Limitations .......................................................................................................................... 6 Coal Mining Risks ....................................................................................................................... 6 Summary of Risk ......................................................................................................................... 7 Proposed Mitigation Strategy ...................................................................................................... 7 APPENDICES Appendix 1 Coal Authority Mining Report Appendix 2 Report Limitations FIGURES Figure 1 Development Layout Plan Figure 2 Site Location Plan Figure 3 Extract From Geological Map Figure 4 Extract from Coal Authority Online Interactive Viewer Earth Environmental & Geotechnical ii Colne Road, Burnley Report No. A1767/G/2 December 2016 1.0 INTRODUCTION Appointment 1.1 Earth Environmental & Geotechnical Ltd was commissioned by SACC Architects Ltd on behalf of Mr. Lee Plaister (the client) to undertake a Coal Mining Risk Assessment for a proposed marina development on a parcel of land at Colne Road, Burnley. Proposed Development 1.2 Figure 1 (below) shows a development layout plan, which consists of an 80 berth marina, club house and manager’s office together with vehicle parking. Figure 1 Development Layout Plan 1.3 A Coal Mining Risk Assessment is required to support a planning application to Burnley Borough Council and to assist with the site design process. Objective 1.4 The purpose of the Coal Mining Risk Assessment is to collate available geological, mining and historical data in order to assess the potential for the site to be affected by underground mining. This report has been drafted in accordance with the Coal Authority Coal Mining Risk Assessment Template, January 2011. Sources of Information 1.5 The Coal Mining Risk Assessment comprises of a review of the following information sources: • Online British Geological Survey maps and data. • Geological Survey of England & Wales, SD83SW, 1/10,560 scale, edition of 1963. • Coal Authority Consultants Mining Report, dated 21st December 2016. 1 Report No: A1767/G/2 Colne Road, Burnley • Coal Authority Interactive Map Viewer, examined on the 21st December 2016. • British Geological Survey online borehole records. • Google Earth imagery. • Online Historical Ordnance Survey maps. • Burnley Borough Council, planning portal. • The Geology of the Burnley Coalfield, London HMSO 1875. • Site Investigations in Areas of Mining Subsidence, FG Bell, 1975. 2 Report No: A1767/G/2 Colne Road, Burnley 2.0 SITE LOCATION AND DESCRIPTION 2.1 The site is located within the town of Burnley, immediately north of Thompson Park with the Leeds Liverpool Canal creating the north west and north east boundaries, and a footpath marking the southern boundary. The approximate National Grid Reference for the centre of the site is SD845334 (384514, 433479) with the nearest postcode BB10 1LD. 2.2 The site occupies approximately 1.63ha, on a triangular shaped plot of land approximately 240m long and 90m wide. Beyond the Leeds Liverpool canal to the north west is a residential development, to the north east and south is municipal parkland. 2.3 A location plan showing the surrounding area is shown below as Figure 2. Figure 2 Site Location Plan Site 3 Report No: A1767/G/2 Colne Road, Burnley 3.0 ASSESSMENT OF DATA Geological Information 3.1 The BGS states that the site is not underlain by artificial ground, though given the nature of the site some made ground is expected. 3.2 The south eastern sector of the site is underlain by alluvium superficial deposits consisting of clay, silt, sand and gravel whilst the northern and western portion is underlain by Devensian till consisting of diamicton, commonly known as Boulder Clay. 3.3 The superficial materials are underlain by the Pennine Lower Coal Measures Formation which consists of mudstone, sandstone, siltstone and coal seams. 3.4 Figure 3 (below) shows an extract from the geological map, which shows the inferred outcrop of the Low Bottom coal seam (0.8 to 1.1m thick) on the site. 3.5 There are 14 BGS public borehole records identified within 250m of the site, the closest is 4m north west of the site (Leeds Liverpool Canal 12). This borehole reveals made ground to a depth of 1.3m, underlain by firm clay to a depth of 15.30m. Figure 3 Extract From Geological Plan Low Bottom Coal Seam 3.6 Local strata are indicated on the geological map to dip to the south west. 4 Report No: A1767/G/2 Colne Road, Burnley Coal Authority Records 3.7 A Coal Authority Mining Report has been acquired for the site and this reveals that there are proven coal mineworkings below the site, associated with the shallowest the Water coal seam (1.2m thick) at a depth of 63m. This was last worked in 1931. 3.8 There is a coal seam (Lower Bent) which is postulated to outcrop across the site, with a bearing of 353 degrees. 3.9 Probable unrecorded coal workings at shallow depth are stated as being present associated with the outcropping coal seam. 3.10 No damage notices, mine gas