NEWINGTON QUARRY Sand & Gravel Extraction Environmental Statement
ANNEX H - FLOOD RISK ASSESSMENT
47072089.ES AECOM March 2015
Flood Risk Assessment for a proposed extension to Newington Quarry, Nottinghamshire
Report ref: 1038/FRA-02
Final March 2015
Report prepared for :
Hanson UK Howley Park Quarry Lane DEWSBURY West Yorkshire WF12 7JJ
BARKERS CHAMBERS • BARKER STREET • SHREWSBURY • UNITED KINGDOM • S Y 1 1 S B T E L : 01743 355770 FAX: 01743 357771 E M A I L : [email protected]
Flood Risk Assessment for a proposed extension to Newington Quarry, Nottinghamshire
Report ref: 1038/FRA-02
Final March 2015
Prepared by: Checked by:
J Watts BSc C C Leake BSc MSc FGS
C Ishemo BSc MSc
Hanson UK Flood Risk Assessment, Newington Quarry Final
CONTENTS
1 INTRODUCTION 1 1.1 Development background 1 1.2 National policy 1 1.3 Local policy 2 1.4 Regulatory requirement for this assessment 2 1.5 Scope of this assessment 2
2 BACKGROUND INFORMATION 3 2.1 Location 3 2.2 Geology and hydrogeology 3 2.3 Site description, surrounding area and hydrology 3 2.3.1 Site description 3 2.3.2 River Idle 3 2.3.3 Smaller watercourses 4 2.4 Fluvial flood management 5 2.4.1 Misson West Flood Storage Area 5 2.5 The existing development 6 2.5.1 Newington South 6 2.5.2 Newington North 6 2.6 The proposed development and restoration 6 2.6.1 Newington South AWA 6 2.6.2 Newington West 6 2.7 Effect of proposals on ground elevations 7 2.7.1 Newington South 7 2.7.2 Newington West 7
3 APPROACH TO THE FLOOD RISK ASSESSMENT 8 3.1 ‘Flood risk’ 8 3.2 Climate change 8 3.3 Scenarios 8 3.3.1 Pre-extraction scenario 8 3.3.2 Baseline scenario 8 3.3.3 Operational development 9 3.3.4 Restored landform 9 3.4 Flood receptors 9 3.4.1 Receptors internal to the site 9 3.4.2 Receptors external to the site 9 3.5 Design events and flooding pathways 10
4 BASELINE FLOOD RISK 11 4.1 Fluvial flow 11 4.1.1 Interaction with site 11 4.1.2 Associated flood risk 12 4.2 Groundwater flow 12 4.2.1 Interaction with site 12 4.2.2 Associated flood risk 13 4.3 Surface water flow 13 4.3.1 Interaction with site 13 4.3.2 Associated flood risk 13 4.4 Sewer and water mains leakage 14 4.4.1 Interaction with site 14
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4.4.2 Associated flood risk 14
5 FLOOD RISK DURING OPERATIONS 15 5.1 Fluvial flow 15 5.1.1 Interaction with site 15 5.1.2 Associated flood risk 15 5.2 Groundwater flow 16 5.2.1 Interaction with site 16 5.2.2 Associated flood risk 16 5.3 Surface water flow 16 5.3.1 Interaction with site 16 5.3.2 Associated flood risk 16 5.4 Sewer and water mains leakage 16 5.4.1 Interaction with site 16 5.4.2 Associated flood risk 17
6 FLOOD RISK AFTER RESTORATION 18 6.1 Fluvial flow 18 6.1.1 Interaction with site 18 6.1.2 Associated flood risk 18 6.2 Groundwater flow 18 6.2.1 Interaction with site 18 6.2.2 Associated flood risk 18 6.3 Surface water flow 18 6.3.1 Interaction with site 18 6.3.2 Associated flood risk 18 6.4 Sewer and water mains leakage 19 6.4.1 Interaction with site 19 6.4.2 Associated flood risk 19
7 MITIGATION MEASURES 20 7.1 Fluvial interaction 20 7.2 Interaction with other hydrological components 20
8 SUMMARY AND CONCLUSIONS 21
TABLES
Table 1038/FRA-02/T1: Daily average flow statistics from National River Flow Archive 4 Table 1038/FRA-02/T2: Recommended increases in parameters due to climate change 8 Table 1038/FRA-02/T3: Internal land uses and flood vulnerabilities 9
DRAWINGS
Drawing 1038/FRA-02/01 Location of Application Area Drawing 1038/FRA-02/02 Flood map for planning Drawing 1038/FRA-02/03 Aerial view of site Drawing 1038/FRA-02/04 Water features map Drawing 1038/FRA-02/05 Modelled flood levels and embankment descriptors Drawing 1038/FRA-02/06 Current site layout in Newington South Drawing 1038/FRA-02/07 Proposed development in Newington South AWA Drawing 1038/FRA-02/08 Proposed development in Newington West
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APPENDICES
Appendix 1038/FRA-02/A1 Environment Agency data Appendix 1038/FRA-02/A2 Flood Risk Assessment criteria Appendix 1038/FRA-02/A3 Newington Site Emergency Response Plan
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1 INTRODUCTION
1.1 Development background
Hanson Quarry Products Europe Ltd (Hanson) owns and operates Newington Quarry in Nottinghamshire, located approximately 14 km southeast of Doncaster and adjacent to the River Idle. The quarry produces sand and gravel for the building trade. Hanson is seeking Planning Permission to extend the permitted mineral extraction area to the south of the current workings at Newington South and for a new extension to the west of the recently restored area of ‘Newington North’.
Two planning applications are being made. One Application Area (17 ha) covers the existing Newington South Quarry and proposes expanding the existing permitted workings into an area known as Newington South Additional Working Area (AWA). The second Area, Newington West (33 ha), is an extension of a previously worked section. The Application Areas are shown on Drawing 1038/FRA-02/01 . Both areas will be restored to conservation on completion of the workings.
A full description of the development is provided in Section 4 of the main Environmental Statement.
1.2 National policy
In September 2011 the Department for Environment Food and Rural Affairs (DEFRA) published the ‘National Flood and Coastal Erosion Risk Management Strategy for England’. The legal framework for flood management in England is summarised in Annex 2 of that document, as follows:
The Flood and Water Management Act (2010) (FWMA) - provides new legislation on flood and coastal erosion risk management, including the development of national and local strategies. It gives Unitary and County Councils the lead in managing flood risk at local scales. Control over these issues at regional and national scale in England is assigned to the Environment Agency (EA).
Flood Risk Regulations (2009) - transpose the EU Floods Directive into UK law. The Regulations set out a six-year cycle of activities to understand and manage risk in-line with the Floods Directive.
The Climate Change Act (2008) - requires a UK-wide climate change risk assessment every five years accompanied by a national adaptation programme that is also reviewed every five years. The Act has given the Government new powers to require public bodies and statutory organisations such as water companies to report on how they are adapting to climate change.
The Water Framework Directive (2000/60/EC) and Floods Directive (2007/60/EC) - require consolidated river basin management planning, assessment and mapping of hazards and risks, and preparation and use of flood risk management plans. The frameworks set out in the directives closely match those already applied in the UK.
Civil Contingencies Act 2004 (CCA) – Legislation that aims to provide a single framework for civil protection in the United Kingdom and sets out the actions that need to be taken in the event of a flood. The CCA is separated into two substantive parts: local arrangements for civil protection (Part 1) and emergency powers (Part 2).
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The current national policy for development planning in England is given in the National Planning Policy Framework (NPPF) (Department for Communities and Local Government, March 2012). The Planning Practice Guidance for England provides more detailed regulatory guidance for control of development with respect to flood risk. This web-based material in turn is supported by technical documents such as ‘Planning Policy Statement 25: Development and Flood Risk: Practice Guide’.
1.3 Local policy
Bassetlaw District Council (BDC) is the relevant local Planning Authority for Newington Quarry development (in terms of assessment of flood risk). BDC’s Core Strategy, adopted in December 2011, includes the following strategic objective:
to ensure that all new development addresses the causes and effects of climate change by, as appropriate, reducing or mitigating flood risk; realising opportunities to utilise renewable and low carbon energy sources and/or infrastructure, alongside sustainable design and construction; taking opportunities to achieve sustainable transport solutions; and making use of Sustainable Drainage Systems.
The flooding and drainage management aspects of this objective are met by Policy DM12, which asserts enforcement of the Sequential Test in locating developments relative to areas at risk from flooding. This policy also indicates that site-specific FRAs are required for all developments in flood risk areas, even where flood defences exist, and refers the developer to the BDD’s Strategic Flood Risk Assessment (SFRA).
1.4 Regulatory requirement for this assessment
The site is located within the Environment Agency’s indicative Flood Zone 3 (Drawing 1038/FRA-02/02 ), where the probability of fluvial flooding in any one year is 1 in 100 or greater. Due to this, and the size of the site, a Flood Risk Assessment (FRA) is required in accordance with the NPPF and the Environment Agency’s Flood Risk Standing Advice for Local Planning Authorities (version 3.1).
1.5 Scope of this assessment
This report assesses the flood-related risks posed to and by the proposed development during the operational period and following restoration of the site. Recommendations are made for measures to mitigate any identified, flood-related risks. Work has been undertaken with reference to the NPPF.
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2 BACKGROUND INFORMATION
2.1 Location
Newington Quarry is shown on Drawing 1038/FRA-02/01 . It is located approximately 1.25 km to the southwest of Misson Village and 3.5 km to the east-northeast of the town of Bawtry in Nottinghamshire, centred on National Grid Reference (NGR) SK 681 942. The site lies between Bawtry Road, which runs between the villages of Bawtry and Misson, and the north bank of the River Idle. The site is bisected by Slaynes Drain, alongside which is Slaynes Lane, a Byway Open to All Traffic.
2.2 Geology and hydrogeology
The regional solid geology within the vicinity of the site comprises Triassic Sherwood Sandstone underlain by a Permian sedimentary sequence (BGS Sheets 88 and 101). The solid geology is overlain by River Terrace deposits, sands, peat and alluvium. River Terrace deposits comprise sands and gravels and constitutes the economic mineral to be worked at the site.
The Sherwood Sandstone is a Principal Aquifer, which is unconfined aquifer in the vicinity of the Application Areas. Groundwater levels and the flow regime are strongly influenced by nearby public water supply abstractions. The River Terrace deposits form a Secondary Aquifer. Groundwater levels in this aquifer are influenced locally by dewatering activities in the current quarry. Hanson maintains a number of groundwater observation wells in order to monitor changes in these local water levels.
Further details of the geology and hydrogeology are contained within the hydrogeological report accompanying the Environmental Statement.
2.3 Site description, surrounding area and hydrology
2.3.1 Site description Detailed site elevation data are available from topographical survey plans (Hanson, June 2014) reproduced elsewhere in the Environmental Statement. Newington South, including the proposed AWA, covers approximately 33 ha of flat floodplain land, the existing ground levels of which are between -4.5 m and 3 metres Above Ordnance Datum (mAOD). It is bounded to the north by Slaynes Lane, to the east by a field boundary, on the south by a flood defence embankment (beyond which lies the River Idle and part of the River Idle Washlands SSSI) and to the west by another field boundary. This part of the site includes existing operational areas as shown in the aerial view ( Drawing 1038/FRA-02/03).
Newington West covers approximately 17 ha of flat floodplain land, the existing ground levels of which are between 1.5 m and 3 mAOD over most of the site, but rising to 7 mAOD along part of the northwest boundary. It is bounded to the north by Bawtry Road, to the east by the existing Newington North, to the south by Slaynes Lane and to the west by ‘Tunnel Tech’ (for the manufacture of mushroom substrate) and other field boundaries. This part of the site consists entirely of arable land.
Ground elevations are given further consideration in Section 2.7 of this report.
2.3.2 River Idle As shown on Drawing 1038/FRA-02/02, the site and surrounding area lie in the floodplain (Flood Zone 3) of the River Idle, the principal nearby watercourse. The majority of this floodplain, and the river itself, has been subject to extensive agricultural and land drainage
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Hanson UK Flood Risk Assessment, Newington Quarry Final improvements which have largely obscured the pre-existing, natural drainage pattern. As a result, the channel and flow characteristics of the river have been modified significantly.
The River Idle flows eastwards towards its confluence with the River Trent at West Stockwith, approximately 11.5 km downstream of the site. Its catchment area at the site is 854 km 2. Numerous man-made drainage channels characterise the area in the vicinity of the site. The confluence of the River Ryton (catchment 249 km 2) with the River Idle occurs 2 km upstream of the site.
The estimated gradient of the river is 1:37,000 (ie 10 cm fall over 3.7 km) between Bawtry and West Stockwith. This is extremely shallow and reflects the nature of the landform and the control measures in operation at West Stockwith.
There are a number of river level gauges on the River Idle within 2 km of the site ( Drawing 1038/HIA/02 in the Hydrological and Hydrogeological Impact Assessment), the closest of which is at Newington, adjacent to the Application Area at NGR SK 6827 9377.
The nearest flow gauging station on the River Idle is at Mattersey (SK 6901 8952), approximately 10 km upstream of the site and upstream of the confluence with the River Ryton. A flow gauging station formerly existed at Serlby Park (SK 641 897) on the River Ryton, approximately 8 km upstream of the site. Summary statistics for both sites, taken from the National River Flow Archive (http://www.ceh.ac.uk/data/nrfa/data/search.html), are shown in Table 1038/FRA-02/T1.
Statistic Mattersey (R Idle) Serlby Park (R Ryton) Catchment Area km 2 529 231 Station elevation mAOD 3.8 5.6 Period of Record: 1982 - 2013 1965 - 1978 Percent Complete: % 99 100 Base Flow Index: 0.78 0.7 3 95% Exceedance (Q 95 ): m /s 0.83 0.45 3 50% Exceedance (Q 50 ): m /s 1.96 1.27 3 10% Exceedance (Q 10 ): m /s 4.07 3.23 Table 1038/FRA-02/T1: Daily average flow statistics from National River Flow Archive
2.3.3 Smaller watercourses The surrounding area has a dense network of land drains. On the north side of the River Idle, a principal drainage axis runs north-south between Newington and Bawtry Golf Course, approximately 1.5 km northwest of the proposed Newington West. North of the golf course, the main channel on this drainage axis is known as Austerfield Drain and flows northward towards the River Torne. From the golf course southwards, the main channel is called New Drain and drains the land southward, discharging into the River Idle at Newington. New Drain also has a tributary known as Rack Dike, which conveys water from land between Austerfield village and the Newington West site.
Separating Newington North from Newington South is a byway known as Slaynes Lane. It parallels Newington Road and enters the village of Misson from the southwest. Along the southeast verge of Slaynes Lane runs a drainage channel called Slaynes Drain (see Drawing 1038/FRA-02/04). This channel receives flow from lateral land drains. Slaynes Drain is a component part of the Misson West Flood Storage Area (see Section 2.4.1).
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Land drainage in the area is managed by the Isle of Axholme and North Nottinghamshire Water Level Management Board (WLMB). The only feature maintained by the WLMB in the immediate vicinity of the site is Slaynes Drain.
2.4 Fluvial flood management
Flooding historically occurred due to backing-up from the tidal River Trent at the West Stockwith confluence of the Idle. Flood alleviation measures have been put in-place comprising flood bunds along both sides of the River Idle downstream from Bawtry, and two sluice gates and a pumping station at West Stockwith. The pumping station was installed to allow discharge to the River Trent when relative elevations were such that gravity discharge was precluded.
According to the Environment Agency, the level of the River Idle upstream of the West Stockwith Pumping Station is maintained at between 1.7 and 2.3 mAOD. During the winter, the upper limit is reduced to 2.1 mAOD, achieved by either opening the sluice gate, or by pumping if sluicing is not possible. With the sluice closed, pumping commences at either 2.1 mAOD or 2.3 mAOD. When flood conditions are expected, the river level can be temporarily reduced to 1.2 mAOD in order to increase channel capacity.
The flood defence bunds on the lower river (not in the immediate vicinity of the site) were designed to cope with a 1 in 50-year event under baseline climate.
The Environment Agency’s Flood Risk Management Strategy for the Isle of Axholme, published in 2013, contained options for cessation of pumping at West Stockwith and relying instead solely on gravity outfall to the River Trent. Refurbishment of the Trent/Idle Tidal Gate was completed in November 2014 and no further capital investment in the pumping station is anticipated before 2021. Any further capital investments after that date will be preceded by a review in-line with the recommendations in the Isle of Axholme Strategy.
Data on the crest elevations, standard of protection and condition of the flood defence embankments in the area around the site have been provided by the Environment Agency and are included in Appendix 1038/FRA-02/A1, Part 1. Drawing 1038/FRA-02/05 combines this information with the adjacent hydraulic model nodes and the baseline climate, 1 in 100-year flood water levels.
Between the site and the north bank of the River Idle, the flood defence bund is considered by the Environment Agency to provide protection for up to a 1 in 10-year event or for the convergence of the peaks of two 1 in 3-year events on each of the Idle and Ryton. This estimate accounts for Environment Agency condition grades of ‘fair’ to ‘very poor’ for the embankment adjacent to the site. However, Environment Agency modelling ( Appendix 1038/FRA-02/A1, Part 2) also indicates that the site would be flooded in the 1 in 5-year event, due to the operation of a weir in the embankment (see Section 2.4.1, below).
2.4.1 Misson West Flood Storage Area The site is situated within a flood storage area known as Misson West Flood Storage Area (Misson West FSA, MWFSA). When the River Idle is in high flood, the southwestern end of Slaynes Drain receives river water via a weir set into the adjacent flood defence embankment. The drain distributes floodwater over its southern bank, flooding all land between itself and the flood defence embankment further downstream. At the same time, the gravity-operated flap valves at the northeastern outfall of Slaynes Drain into the river are closed by the high river stage. On recession of the water level in the River Idle, the flap valves open and let the stored water back into the river. The inlet weir is 60 m long and has a crest elevation of 3.72 mAOD,
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Hanson UK Flood Risk Assessment, Newington Quarry Final slightly lower than that of the adjacent flood defence embankment. EA modelling indicates that the MWFSA operates in floods of return period 5 years or greater.
The northern extent of the flood storage area is defined by Bawtry Road, which is raised on an embankment above the floodplain.
2.5 The existing development
2.5.1 Newington South The existing mineral extraction operation at Newington South consists of six phases and the current working plan is shown on Drawing 1038/FRA-02/06 . Phase 4 is currently being worked with Phase 5 being stripped of topsoil and subsoil.
The watertable is relatively close to ground level and dewatering of the current area is maintained to allow dry working. Dewatering is via a sump in the quarry floor from which water is pumped to a settling lagoon before being discharged into the River Idle.
2.5.2 Newington North The previously worked area of Newington North has been restored to conservation use.
2.6 The proposed development and restoration
It is proposed to extend the permitted mineral extraction area to the south of the current workings at Newington South and to create a new area of working at Newington West (to the west of the recently restored area of Newington North). Mineral processing will not be undertaken on the site and the ‘as dug’ mineral will be transported by road to an existing processing plant at Auckley, which is located 10.5 km from the site.
2.6.1 Newington South AWA An outline of the proposed mineral extraction phasing at Newington South AWA is shown on Drawing 1038/FRA-02/07 . Detailed working plans are included elsewhere in the Environmental Statement. Restoration will be progressive such that topsoil and subsoil removed from each phase will be placed directly into the preceding phase. A proportion of the mineral is situated below the watertable, therefore it is proposed to undertake dewatering (as per the existing arrangements), pumping water into the existing lagoon.
Restoration of the AWA will be to wet grassland and reedbed and integrated into the restoration for the current working area. The reedbed and wet grassland habitat is to be managed with a series of water control structures and pipes which will direct water southwestwards, ultimately outfalling to the River Idle if necessary.
2.6.2 Newington West An outline of the proposed extraction phasing at Newington West is shown in Drawing 1038/FRA-02/08 , detailed plans are available elsewhere in the Environmental Statement. An area to the west of Phase 3 will be utilised to temporarily store topsoil, subsoil and overburden. Restoration will be progressive such that overburden, subsoil and topsoil from each phase will be placed into the proceeding phase. A proportion of the mineral is situated below the watertable. Therefore it is proposed to undertake dewatering, pumping water into a pre-existing lagoon in the restored Newington North. Clean water will be pumped into the River Idle.
A site access and haul road will be constructed of crushed aggregate along the eastern boundary of Newington West. Soil bunds will be placed along the edge of this road where it remains at existing ground levels, for the duration of the operations.
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Newington West will be restored to a wet/dry mosaic grassland area with a series of ponds, ditches and areas of high ground up to 2 mAOD.
2.7 Effect of proposals on ground elevations
2.7.1 Newington South Ground elevations in the proposed Newington South AWA currently average 2.0 mAOD, with the highest elevations in the centre of the eastern side. Elevations of the flood embankment to the south of the site are understood to be slightly higher than the inlet weir (3.72 mAOD) at the western end of Slaynes Drain. The area to the north of the AWA is currently being worked under the existing planning permission. Elevations to the north of the proposed mineral extraction area, along Slaynes Lane, are approximately 2.8 mAOD.
There are a number of topsoil, subsoil and overburden storage bunds already present within the current Application Area, as shown on Drawing 1038/FRA-02/06 . Topsoil bunds in Phase 1 and at the far western end of the Newington South site are to be consumed at an intermediate stage of restoration. However, the three main existing bunds shown in the drawing (one each of topsoil, subsoil and overburden) will remain until the final phases of restoration. It is proposed that one new topsoil bund will be created, located adjacent to the overburden bund in the west. At present the maximum elevation of the existing storage bunds is 5.7 mAOD. There will also be areas of lowered elevation, where mineral extraction is occurring down to elevations of approximately -5 mAOD.
Upon restoration the pre-existing ground elevations in the AWA will have been lowered to between 0 m and 1.1 mAOD, which will be contiguous with elevations in the restored area of the current workings.
2.7.2 Newington West Ground elevations across most of Newington West currently range between 1.7 m and 3 mAOD, with a small area in the northwest rising up to 7 mAOD.
During mineral extraction areas of raised elevation will exist where topsoil, subsoil and overburden is temporarily stored. Where possible, these will be aligned parallel to flood flows. There will also be areas of lowered elevation where mineral extraction is occurring. Phase 1 will have a base elevation of -3.0 m to -4.0 mAOD whilst Phases 2 and 3 will have a base elevation of -0.3 m to 0.4 mAOD.
Ground elevations after restoration will have been lowered to between 0 m and 0.4 mAOD within the working area.
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3 APPROACH TO THE FLOOD RISK ASSESSMENT
3.1 ‘Flood risk’
Using a mixture of quantitative and qualitative methods, this FRA considers the likelihood of flooding, the associated hazards and the vulnerability of the flood receptor. These factors are combined to produce the single measure, ‘flood risk’, as illustrated in Appendix 1038/FRA-02/A2.
3.2 Climate change
Within the UK, projections of future climate change indicate that there will be more frequent, short duration, high intensity rainfall evens and periods of long duration rainfall. The National Planning Policy Framework (NPPF) recommends that the effects of climate change are incorporated into Flood Risk Assessments. Recommended precautionary sensitivity ranges for peak rainfall intensities and peak river flows are outlined in the Environment Agency document, ‘Climate change allowances for planners’ (September 2013) and are summarised in Table 1038/FRA-02/T2.
Years 1990 to 2025 2025 to 2055 2055 to 2085 2085 to 2115 Increment in peak rainfall +5% +10% +20% +30% intensity Increment in peak river flow +10% +20% Table 1038/FRA-02/T2: Recommended increases in parameters due to climate change
Modelled river flood levels have been obtained from the EA but are based on baseline climate; these flood levels are typically augmented by between 150 mm and 600 mm by the EA to account for climate change before being used as a basis for development design. Freeboards to account for other uncertainties, such as modelling error, may additionally be applied.
3.3 Scenarios
3.3.1 Pre-extraction scenario Newington South: Before mineral extraction commenced in Newington South, the area had a flat topography and was used for agriculture as well as forming part of the Misson West Flood Storage Area. The pre-extraction scenario is not considered in detail in this FRA. However, it is relevant for comparing the reservoir’s storage capacity as built with that expected on completion of the proposed restoration landform.
Newington West: This area is currently un-worked and is considered as such under the baseline scenario.
3.3.2 Baseline scenario The baseline scenario is defined as the existing situation on-site. This situation is described in Section 2.6 of this report. In summary, Newington West and Newington South AWA are being farmed for arable crops, while mineral extraction and restoration is proceeding in the existing Newington South working area. For the purpose of risk assessment the climate is conservatively assumed to be pre-1990, thus involving no increases in peak rainfall intensities or peak river flows.
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3.3.3 Operational development Newington South AWA and Newington West will be worked and restored progressively as outlined in Section 2.6 of this report.
3.3.4 Restored landform The restored landform within both Application Areas will be at or below existing ground levels, as outlined in Section 2.7. It is anticipated that this landform will pertain in perpetuity, thus being subject to the effects of long-term climate change with increments of 30% and 20% in peak rainfall intensities and peak river flows, respectively, above the baseline climate values.
3.4 Flood receptors
3.4.1 Receptors internal to the site In the pre-extraction and baseline scenarios, all or part of the Application Areas are used for arable farming. The flood vulnerability class of these areas, as defined in the Planning Practice Guidance (for England), is ‘less vulnerable’.
The operational site itself, comprising Newington South and Newington West combined, will be a potential flood receptor. As it will be a sand and gravel extraction site, it will qualify as ‘water compatible’. This is the least flood-vulnerable of all categories and so a high degree of flood resilience is generally expected.
The restored site’s use will be nature conservation and biodiversity, and will be accessed by people only for recreational purposes (eg bird-watching). It will therefore qualify as ‘water compatible’.
For each scenario, the internal site uses and associated flood vulnerability categories under the Planning Practice Guidance for England are given in Table 1038/FRA-02/T3.
Scenario Site Use (flood vulnerability) Newington South Newington West Pre-extraction Agriculture Agriculture (less vulnerable) (less vulnerable) Baseline scenario Sand/Gravel Extraction Agriculture (water compatible) (less vulnerable) Operational site Sand/Gravel Extraction Sand/Gravel Extraction (water compatible) (water compatible) Restored site Nature Conservation Nature Conservation (water compatible) (water compatible) Table 1038/FRA-02/T3: Internal land uses and flood vulnerabilities
3.4.2 Receptors external to the site Approximately 800 m west of Newington West, the hamlet of Newington lies entirely within Flood Zone 3. Beyond this, much of Austerfield village lies within Flood Zone 2. To the east of the site, much of Misson village lies within Flood Zone 2. Opposite the site and to the south of the River Idle, there are several farmsteads in Flood Zone 3.
The above are the ‘more vulnerable’ receptors within the locality of the site. This level of vulnerability increases the potential severity of the consequences of flooding for these receptors.
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The overall degree of flood risk may thus be higher for such receptors for a given severity of flood event.
Other receptors outside the site, comprising roads and agricultural fields, are all classed as ‘less vulnerable’.
3.5 Design events and flooding pathways
As required by the Planning Practice Guidance, the return period of the fluvial and rainfall events considered is 100 years and the effects of climate change will be factored in as described in Section 3.2 of this report. This design event will be referred to as the climate-changed, 1 in 100- year event.
This FRA considers the following hydrological components:
Fluvial flow Surface water run-off Groundwater flow Sewer and/or water mains leakage
Pathways of flooding may involve two or more such components in sequence, such that the type of flow at the source or site of perturbation is not the same as that delivering flooding to the receptor.
In this site-specific FRA, flood risk to both internal and external receptors is assessed with reference to interactions between the development site and these hydrological components. For internal, but not external, receptors this furnishes information on the degree of flood hazard and hence the degree of flood risk. In the case of external receptors, flood hazard and hence flood risk during the design events is not evaluated. Instead the potential for the development to qualitatively increase or decrease flood risk at external receptors is assessed so that targeted measures to ensure a qualitative reduction can subsequently be taken, if necessary.
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4 BASELINE FLOOD RISK
4.1 Fluvial flow
4.1.1 Interaction with site Drawing 1038/FRA-02/05 shows the defences with their crest elevations, condition grades and standards of protection, together with the adjacent hydraulic model nodes and the baseline climate, 1 in 100-year flood water levels. Appendix 1038/FRA-02/A1, Part 2 includes plans of the modelled flood extents for various return periods, under baseline climate, including the assumed effects of embankments. Appendix 1038/FRA-02/A1, Part 3 shows estimated flood extents for two historical events:
• Tidal Trent March 1947, and • Rivers Idle and Ryton, February 1977
These illustrate the extent of flooding that might occur in the absence of flood defence embankments.
South bank of River Idle On the south bank of the river, EA data ( Appendix 1038/FRA-02/A1, Part 1 ) indicate that the flood defence embankment can prevent flooding in events of return period lower than 50 years, under baseline climate, with no flooding on its landward side. Although the embankment crest levels are over 1 m higher than the modelled baseline climate, 1 in 200-year flood water levels, the condition grade is mainly ‘fair’ to ‘poor’, as shown in Appendix 1038/FRA-02/A1, Part 1 . Hence, despite the relatively high crest height, the estimated standard of protection has been reduced to reflect the condition of the embankments. The modelled flood extents shown in Appendix 1038/FRA-02/A1, Part 2 show no flooding beyond these defences. However, this is taken as the declaration of a modelling assumption that has the effect of increasing modelled water levels, rather than an indication of expected flood extents. Farmsteads situated south of the river are in Flood Zone 3 and are considered to be flooded for event return periods greater than 50 years.
North bank of River Idle The local flood defence embankment on the north bank has lower crest levels than the south bank embankment, and in parts has a worse condition grade (‘fair’ to ‘very poor’). Upstream of the site at Newington Farm the embankment supports Hagg Lane, a continuation of Slaynes Lane, and is given a standard similar to that of the south bank defence. All modelled flood flows are constrained between the defences at this point. However, immediately downstream of Newington Farm, the flooded area shown in Appendix 1038/FRA-02/A1, Part 2 opens out onto the site as part of the Misson West Flood Storage Area (MWFSA). This flood storage facility extends as far downstream as the western edge of the village of Misson, where the modelled flood flows are again constrained between the embankments on both sides of the river.
At lower return periods (up to 10 years), flooding within the MWFSA affects Newington South alone. At return periods of 25 years or greater, Newington North and Newington West are also affected.
Rates of floodwater transmission out of the river and into the MWFSA are governed by the weir at the western end of Slaynes Drain (see Section 2.4.1), while return rates are governed by a pair of sluice gates at the outfall of Slaynes Drain into the river, approximately 2.75 km further downstream. In severe flood events, breaching of the defence embankment adjacent to the site (considered to be in ‘fair’ to ‘very poor’ condition) might provide extra transfer locations. Nevertheless, the overall rate of floodwater transmission from the river into storage (and vice versa ) would remain lower than in the unconstrained case. Water levels in the storage area
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Hanson UK Flood Risk Assessment, Newington Quarry Final therefore lag significantly behind those in the river, thus retarding the progress of the flood downstream.
The order in which areas within the MWFSA are flooded will follow the order of increasing flood return periods for these areas as shown in Appendix 1038/FRA-02/A1, Part 2, assisted by the transmission and distribution of floodwater by Slaynes Drain. Thus, Newington South is flooded before Newington West.
The EA has observed ( Appendix 1038/FRA-02/A1, Part 4) some localised emergence of water from the ground surface on the landward side of the flood embankment when the river level is high in the vicinity of Misson.
To ensure the integrity of the flood defence embankment a stand-off distance of at least 9 m will be maintained between the nearest edge of the void in the Newington South AWA and the toe of the embankment.
4.1.2 Associated flood risk The site’s annual probability of flooding is 4% or greater, considered a ‘high’ likelihood (see Appendix 1038/FRA-02/A2).
In Newington West (see Section 2.4.1) the floodwater depth would vary from zero in the northwest to a maximum of 2.96 m in the southeast. The velocity and speed of onset would be low and as this land is only used for arable farming the degree of flood risk is considered ‘low’.
In Newington South, sand and gravel extraction is proceeding with the base of workings at approximately -4.5 mAOD. The design flood event thus produces water depths of up to approximately 8.4 m. The speed of onset of flooding would be greater than at Newington West, since Newington South must be flooded before Newington West can be flooded. Also, initial velocities may be higher because of the abrupt drop into the working void. Without mitigation measures such as registration on the EA flood warning service and a flood emergency plan, the associated flood risk is ‘high’. However, these measures are currently implemented and so the risk is considered ‘low’.
Seepage such as that noted in Section 4.1.1 can weaken flood defence embankments and cause breaching. However, with the implementation of procedures to evacuate the site well in advance of flooding, the associated risk is considered ‘low’.
At Newington West, activities that might increase flood risk elsewhere are not undertaken.
At Newington South, the quarry void provides additional flood storage within the Misson West Flood Storage Area. Topsoil, subsoil and overburden are being stored temporarily above ground level on-site, thus reducing the potential gain in flood storage capacity. However, the great majority of the extracted material is transported off-site for processing at Auckley. Furthermore, some of the material stored on-site is above the design flood level. Thus there is a net gain in flood storage capacity as a result of the current Newington South operations.
4.2 Groundwater flow
4.2.1 Interaction with site Interaction between groundwater and the site is addressed in detail in the accompanying HIA report.
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Newington West is currently undisturbed farmland and groundwater levels are below existing ground level. Apart from the possibility of occasional waterlogging at the surface and drainage by ditches, this part of the site currently does not interact with groundwater.
The quarry void at Newington South is, by design, located partially below the surrounding normal watertable level in the sand and gravel. This is achieved by drainage and dewatering: groundwater is conveyed to a sump from where it is pumped to the River Idle, as consented under Environmental Permit T/78/46242/T/V001.
4.2.2 Associated flood risk Groundwater flood risk to and from Newington West is currently negligible. If pumping is stopped in Newington South, the rate of water level build-up in the void is very slow, such that personnel have sufficient time to evacuate safely. Therefore flood risk in Newington South is not considered significant.
4.3 Surface water flow
4.3.1 Interaction with site Due to the presence of peat in some areas, there is limited potential for waterlogging and subsequent ponding and run-off at the site.
The existing run-off rates are ‘greenfield’, in all areas that are not currently part of the quarry operations. Any run-off entering the site from higher ground joins the site’s own run-off into the drainage ditches. However, the Bawtry Road reservoir embankment prevents exchange of any surface water between the site and the land north of Newington West. The riverside flood defence embankment similarly constrains surface water flow at the southern boundary of Newington South. Slaynes Drain intercepts surface water flow at the southern and northern boundaries of Newington West and Newington South, respectively. At other boundaries, significant incoming run-off does not occur due to the flatness of the topography in the area.
Within the existing Newington South quarry void, surface water run-off occurs as a result of the saturated state of the quarry floor.
The haul-roads within Newington South allow some infiltration. However, the run-off generated from these surfaces is expected to be greater than that from the pre-existing soils. Some of this surface water runs off into Slaynes Drain via a vegetated buffer strip at the site boundary.
However, the overall rate of surface water discharge into Slaynes Drain is temporarily reduced by the presence of a quarry void that captures a significant part of the run-off from its local catchment. As the captured run-off is pumped from the sump to the River Idle at a level- dependent rate, its peak flow rate into the river system is subject to some attenuation.
Phases 2 and 3 of Newington South have been partially restored to wet grassland at a ground level slightly lower than that of the original agricultural land. The wetland vegetation, once fully established, will present high flow retardation to overland flow and therefore peak run-off rates are expected to decline.
4.3.2 Associated flood risk Flood risk posed by existing site interaction with pluvial water is not considered significant either for internal or external receptors.
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4.4 Sewer and water mains leakage
4.4.1 Interaction with site Sewers or water mains may be present along Bawtry Road, on the northern boundary of Newington West. Any leakage from them would be of significantly smaller magnitude than the design fluvial flood and design rainstorm. On reaching the ground surface, such water would pond near to the source of the leakage and any resulting overland flow would be captured by land drains. Utility organisations would subsequently repair the broken pipes.
4.4.2 Associated flood risk Flood risk posed by existing site interaction with mains leakage is not considered significant for any receptor.
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5 FLOOD RISK DURING OPERATIONS
5.1 Fluvial flow
5.1.1 Interaction with site Fluvial flooding of the site would occur in the same way as in the baseline situation (see Section 4.1), in which floodwater flows into the MWFSA via the weir at the western end of Slaynes Drain, and returns to the river via the sluice gates at the eastern end of the drain.
However, the floodwater would encounter different quarry voids and soil storage bunds, which raises the question of flood storage capacity. The size of the working void in Newington South will remain approximately the same as in the baseline situation. However, the export of mineral from site and the progressive restoration to lower than pre-extraction ground levels will gradually increase the overall flood storage space available within the MWFSA.
During operations, the supplementary storage space provided by the voids will be at lower elevations than the space occupied by the bunds, shifting the centre of gravity of the storage body to a lower level. However, the upstream weir will remain the only point of entry to the storage area, due to the embankment between the site and the river. The sluice gates at the downstream end of Slaynes Drain will remain the only point of exit. Between the two points, the elevations at which water is stored will not affect the entry or exit rates, except that release of floodwater from the quarry voids back into the river will be possible only by pumping, after recession of the river has enabled access to the site. Consequently, the lag in flood transmission provided by the MWFSA will be unaffected by the presence of the new storage bunds.
Newington South Phases 7 and 8 will be located immediately adjacent to the flood defence embankment. In the event of a breach adjacent to these phases, the flowpath length to the near edge of the quarry void would be nearly zero.
On recession of flooding in the River Idle, the floodwater filling the quarry voids will be pumped back into the River Idle.
5.1.2 Associated flood risk The site’s annual probability of flooding would remain at 4% or greater, considered a ‘high’ likelihood (see Appendix 1038/FRA-02/A2).
Depths of flooding would be similar to those in the baseline case – of the order of 8 m. Newington South AWA, the new void, would be closer to the defence embankment but further from Slaynes Drain, from which floodwater is distributed over the area. Hence the time of onset of flooding would be similar to or slightly greater than the baseline case. For Phase 1 of Newington West, the time to onset would be slightly shorter, as floodwater could flow rapidly across the quarry void on encountering its closest edge. Velocities on initially entering the voids, as noted in Section 4.1, would be high.
The associated flood risk in Newington South without any control measures in place is considered to be ‘high’. However, there is an existing Emergency Response Plan for Newington South, reproduced in Appendix 1038/FRA-02/A3, which includes information regarding flood events. This Emergency Response Plan will remain in place while mineral is extracted from the AWA. Newington South will continue to be registered with the Environment Agency’s flood warning service, currently known as ‘Flood Warnings Direct’ during the proposed operations in the AWA. With these measures in place the flood risk in Newington South is reduced to ‘low’.
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As these control measures will continue into the Newington West area, the flood risk here is also considered to be ‘low’.
Since the net flood storage capacity in the Misson West Flood Storage Area would be increased during the proposed operations, flood risk elsewhere would be reduced. However, the pumping of floodwater from the quarry voids back into the River Idle could, if performed too soon after recession of floodwaters from the site, delay the further recession of floodwaters in the river and thus prolong flooding elsewhere. During previous flood events, the pumping out of flood water has been carried out in consultation with the Environment Agency, requiring the issue of a temporary, time-limited, Environmental Permit to discharge. If this practice is continued after future events, the risk of prolonging flooding downstream of the site is considered to be ‘low’ and no further mitigation measures are required.
5.2 Groundwater flow
5.2.1 Interaction with site At Newington South, work below the surrounding watertable level will continue to be achieved by draining incoming groundwater to sumps and pumping out to the River Idle (see Section 4.2.1). The same method would be used in Newington West.
5.2.2 Associated flood risk The associated degree of flood risk is not considered significant for any receptor (internal or external).
5.3 Surface water flow
5.3.1 Interaction with site As operations progress, areas of existing arable land will become quarry void and be progressively restored to wet grassland or reedbed at lower than original elevations. The surface water interactions are described in Section 4.3.1.
Since the proposed access and haul road in Newington West will be flanked by bunds for the duration of the operations, the increased run-off from its surface will be directed into the working area. Here it will be collected into the sump, together with incoming groundwater, and subsequently pumped to the settlement lagoon, before discharge to Slaynes Drain or the River Idle.
Exchange of overland flow between the site and adjoining areas will continue to be constrained by the Bawtry Road embankment, the riverside flood defence embankment and Slaynes Lane. The site will continue to receive some surface water run-off across its other boundaries but the flat topography of the area limits such exchanges. Any surface water entering the operational sites is likely to be captured by the quarry voids.
5.3.2 Associated flood risk Flood risk posed by operational site interaction with pluvial water is not considered significant for any receptors, whether internal or external.
5.4 Sewer and water mains leakage
5.4.1 Interaction with site As in the baseline case, leakage from mains pipes could occur along the northern boundary of Newington West, but is unlikely to present significant flows into the site. On entering the site, it
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Hanson UK Flood Risk Assessment, Newington Quarry Final would flow into the collection sump along with groundwater and surface water run-off. Utility organisations would repair the broken service pipe.
5.4.2 Associated flood risk Flood risk posed by operational site interaction with mains leakage is not considered significant for any receptor.
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6 FLOOD RISK AFTER RESTORATION
6.1 Fluvial flow
6.1.1 Interaction with site Fluvial flooding would occur in the same way as in the baseline situation (see Section 4.1), with the exception that floodwater spreading through the site would not encounter a quarry void. Nevertheless, it would encounter ground levels slightly lower than those of the pre-extraction situation, and higher flow resistance from wetland vegetation. Due to the uneven restoration surface, localised flood depths in both Newington West and Newington South would be up to 1 m greater than those in the pre-extraction situation. The total capacity of the Misson West Flood Storage Area will be slightly increased by the marginally lower average ground level. Drainage back into the River Idle would occur in the same way as in the pre-extraction case.
6.1.2 Associated flood risk The site’s annual probability of flooding would remain at 20% or greater, considered a ‘high’ likelihood (see Appendix 1038/FRA-02/A2). As the restored site will be used for nature conservation and will be ‘water compatible’, the associated degree of flood risk is considered to be ‘very low’.
Since the net flood storage capacity in the Misson West Flood Storage Area would be increased during the proposed operations, flood risk elsewhere would be reduced.
6.2 Groundwater flow
6.2.1 Interaction with site Ground levels in the restored site will be slightly lower than those in the pre-extraction case and so waterlogging might occur more frequently. This is part of the design for nature conservation purposes.
6.2.2 Associated flood risk The associated degree of flood risk is not considered significant for any receptor (internal or external).
6.3 Surface water flow
6.3.1 Interaction with site The wetland vegetation, once fully established, will present high flow retardation to overland flow and therefore surface water flow depths will marginally increase while peak run-off rates are slightly reduced.
Exchange of overland flow between the site and adjoining areas will continue to be constrained by the Bawtry Road embankment, the riverside flood defence embankment and Slaynes Lane. The site will continue to receive some surface water run-off across its other boundaries but, as noted in Section 4.3.1, the subdued topography of the area limits such exchanges.
6.3.2 Associated flood risk Flood risk posed by restored site interaction with pluvial water is not considered significant for any receptors, whether internal or external.
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6.4 Sewer and water mains leakage
6.4.1 Interaction with site As in the baseline case, leakage from mains pipes could occur along the northern boundary of Newington West, but is unlikely to present significant flows into the restored site. On entering the site, it would join water already present in the wetland and eventually drain into the River Idle.
6.4.2 Associated flood risk Flood risk posed by restored site interaction with mains leakage is not considered significant for any receptor.
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7 MITIGATION MEASURES
7.1 Fluvial interaction
Provided the scheme is implemented as proposed together with the existing control measures, flood risks are considered to be low and no additional mitigation measures are required.
Flood defence embankment
7.2 Interaction with other hydrological components
The degree of flood risk associated with the site’s interaction with other hydrological components has not been found to be significant. Therefore further mitigation measures are not considered necessary.
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8 SUMMARY AND CONCLUSIONS
Planning Applications have been prepared for additional mineral extraction at Newington Newington Quarry, near Misson, Nottinghamshire. Within the existing Permitted boundary of Newington South, it is proposed to increase the approved operational area southwards towards the River Idle into an area known as Newington South Additional Working Area. It is also proposed to create a new 17 ha operational area on the northern side of Slaynes Lane, termed Newington West.
Both areas will be restored to a combination of wet grassland and reedbed for enhancement of biodiversity.
The site is located almost entirely within Flood Zone 3, thus requiring a site-specific Flood Risk Assessment.
The site is located within Misson West Flood Storage Area, but is defended to a standard of 1 in 5-years. High existing fluvial flood risk will also apply to the proposed development. However, these risks are already managed by the existing control measures, which include flood evacuation procedures and the use of the Environment Agency’s (EA) flood warning service. With these measure in place, the risk is considered to be low.
Fluvial floodwater filling the working voids would be pumped back to the River Idle after the river has receded as determined by consultation with the EA, which will also set the maximum permissible rate of discharge.
The shortest distance between the nearest working face and the landward toe of the flood defence embankment will be 9 m.
During operations the net capacity of the Misson West Flood Storage Area will be temporarily increased due to the creation of voids and removal of material off-site. There will also be a long- term increase in flood storage capacity, as the restored ground levels will be lower than original.
Incoming rainwater, surface water and groundwater will drain by gravity to sumps, pumped to settlement lagoons and then to the River Idle as currently consented under Environmental Permit T/78/46242/T/V001. Run-off from peripheral access/haul roads will be directed into the working areas for collection within this water management system.
The restored landform will have ‘level’ topography and wetland vegetation, thus producing low rates of run-off. Fluvial flood risk will not be significant for the restored land use.
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DRAWINGS
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466000 467000 468000 469000 Legend Asset No.2 Application Area Flood Defences 0 0 0 0 0 0
5 5 Watercourses 9 9 3 3 Main River L129 Drain L136 Flood model node
Asset No.12 1% AEP modelled flood water levels (baseline climate) Asset No.11 L136 Node Level (mAOD) 0 0
0 0 L166 3.98 0 0 4 4
9 9 L161 3.96 3 L140 3 L154 3.93 L149 3.91 L149 L140 3.89 L166 L136 3.88 L129 3.87 See Appendix 1038/FRA/A2 for L161 details L154 Weir elevation 3.72 mAOD Asset No.8 0 0 0 0 0 0 3 3 9 9 3 3 Asset Design Crest height Grade No. standard (mAOD) 2 10 4.40 V.Poor 8 10 3.87 Poor 11 10 4.76 Fair 12 50 6.27 Poor
See part 2 of Appendix 1038/FRA/A2 © Crown Copyright and database rights 2014. 0 250 500 m Ordnance Survey License Number 100048957. Supplied by: www.ukmapcentre.com 466000 467000 468000 469000 Scale correct at A4 Client Title Barkers Chambers, Barker Street, Hanson UK Modelled Flood Levels and Embankment Descriptors Shrewsbury, SY1 1SB Howley Park Quarry Lane Project Newington Quarry Tel. 01743 355 770 Dewsbury Fax. 01743 357 771 Drawing Date Scale West Yorkshire, WF12 7JJ 1038/FRA-02/05 Feb-15 1:20,000
Hanson UK Flood Risk Assessment, Newington Quarry Final
APPENDIX 1037/FRA-02/A1
Part 1 – Environment Agency flood defence condition data
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Defences Map centred on Hagg Lane, Newington - created 29 October 2014 Ref: [E9234]
Scale 1:15,000 22
Legend
111 FloodFlood DefenceDefence LocationsLocations
1122
000 111
11 99 1111
88 66
77 55
1144
1313 1313 33
444
© Environment Agency copyright and / or database rights 2014. All rights reserved. © Crown Copyright and database right. All rights reserved. Environment Agency, 100024198, 2014. Contact Us: National Customer Contact Centre, PO Box 544, Rotherham, S60 1BY. Tel: 03708 506 506 (Mon-Fri 8-6). Email: [email protected] Hanson UK Flood Risk Assessment, Newington Quarry Final
Table A1.2 Condition grading of assets shown on map centred on Hagg Lane, Newington
Table A1.2 Definition of Environment Agency flood defence condition grades
Source: Guidance on determining asset deterioration and the use of condition grade deterioration curves (Defra/Environment Agency, 2009)
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APPENDIX 1037/FRA-02/A1
Part 2 – Environment Agency modelled flood flow and water level data
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Modelled Extents Map centred on Hagg Lane, Newington - created 29 October 2014 Ref: [E9234]
Scale 1:15,000
Legend
11 inin 55 yearyear ModelledModelled ExtentExtent
11 inin 1010 yearyear ModelledModelled ExtentExtent
L136L136 11 inin 2525 yearyear ModelledModelled ExtentExtent
11 inin 5050 yearyear ModelledModelled ExtentExtent
11 inin 100100 yearyear ModelledModelled ExtentExtent L140L140 11 inin 150150 yearyear ModelledModelled ExtentExtent L166L166 L149L149 L172L172 11 inin 200200 yearyear ModelledModelled ExtentExtent L161L161 L178L178 ModelledModelled NodeNode LocationLocation andand ReferenceReference L178L178 L154L154 Source:Source: RiverRiver IdleIdle FloodFlood RiskRisk MappingMapping Study,Study, JBA,JBA, MarchMarch 20052005
© Environment Agency copyright and / or database rights 2014. All rights reserved. © Crown Copyright and database right. All rights reserved. Environment Agency, 100024198, 2014. Contact Us: National Customer Contact Centre, PO Box 544, Rotherham, S60 1BY. Tel: 03708 506 506 (Mon-Fri 8-6). Email: [email protected] Hanson UK Flood Risk Assessment, Newington Quarry Final
Table A1.3 Modelled flow and level data
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APPENDIX 1037/FRA-02/A1
Part 3 – Environment Agency historical flood extent data
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Historic Flood Events Map centred on Scrooby, Newington and Misson - created 29 October 2014 Ref: [E9234]
Scale 1:40,000
Legend
19471947 FloodFlood EventEvent OutlineOutline
19771977 FloodFlood EventEvent OutlineOutline
© Environment Agency copyright and / or database rights 2014. All rights reserved. © Crown Copyright and database right. All rights reserved. Environment Agency, 100024198, 2014. Contact Us: National Customer Contact Centre, PO Box 544, Rotherham, S60 1BY. Tel: 03708 506 506 (Mon-Fri 8-6). Email: [email protected] Hanson UK Flood Risk Assessment, Newington Quarry Final
APPENDIX 1037/FRA-02/A1
Part 4 – Environment Agency comments re: site
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Carl Ishemo Our Ref: DNL-9800 Hafren Water Your Ref:
Date: 15/01/2015
Dear Carl
Enquiry regarding:- Hydrological Impact Assessment and Flood Risk Assessment near Newington Follow on from DNL-9742.
Thank you for your request for information that was received on 06/01/2015.
We respond to requests under the Freedom of Information Act 2000 and Environmental Information Regulations 2004.
The current use of the flood storage areas at Misson is to provide additional capacity to cope with a storm event that causes flow in the Idle to exceed the capacity of West Stockwith Pumping Station to discharge the River Idle to the River Trent. It is therefore an integral part of the flood defence scheme for the lower Idle. That said, the need for formal flood storage facilities rather than natural active flood plain is due for review.
We are not aware of any design drawings for the flood embankments near Misson. It is believed that the banks were constructed when the river was re-graded by the old National Rivers Authority. The usual method of construction was to build up the bank in layers of around 150mm. Each layer being compressed by sheep-foot roller before the next layer was applied. Finally a layer of topsoil would have been seeded to provide a grass covering. The bank would have been made of locally won material of mixed consistency. The last time the bank was subject to its maximum head difference from the river to the “dry” side of the flood-bank seepage was observed which was believed to be due to piping through the ground beneath the bank.
Having checked the WLMP about a week ago it had not been updated since the December 2006 edition. Certainly the normal operation of the pumping station at West Stockwith has not been altered.
I have attached our Standard Notice or licence which explains the permitted use of this information.
Environment Agency, Trentside Offices, Scarrington Road, West Bridgford, Nottingham, NG2 5BR Customer services line: 03708 506 506 Email: [email protected] www.gov.uk/environment-agency 2
Please get in touch if you have any further queries or contact us within two months if you’d like us to review the information we have sent.
Yours sincerely
June Rolland Customers & Engagement Officer Derbyshire, Nottinghamshire & Leicestershire
For further information please contact the Customers & Engagement Team on 0115 846 3696/3691. Direct e-mail:- [email protected]
Environment Agency, Trentside Offices, Scarrington Road, West Bridgford, Nottingham, NG2 5BR Customer services line: 03708 506 506 Email: [email protected] www.gov.uk/environment-agency Hanson UK Flood Risk Assessment, Newington Quarry Final
APPENDIX 1038/FRA-02/A2
Flood Risk Assessment criteria
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Framework for Assessment of Flood Hazard, Consequence and Risk The assessment of flood risk has been carried out in such a way as to meet the requirements of the National Planning Policy Framework (England) or Planning Policy Wales Technical Advice Note 15 (Wales). This allows a degree of risk to be assigned, on a scale ranging from ‘very low’ to ‘high,’ to each flood risk pathway or source-receptor combination. The assessment proceeds under the framework shown in the diagram below.
Flood Risk
Combined as in Table A
Likelihood Consequences
(Currently categorised on the Environment Agency website, and in future on the NRW website) Combined as in Table B
NPPF or TAN15 Classification of Flood Hazard Receptor Vulnerability
Combined as in Table C
Debris Depth Flow Velocity Availability
Annual Exceedance Probability (AEP) (%) from quantitative modelling in tandem with qualitative considerations
P:\Legislation & Guidance\Flood Risk\NPPF\NPPF Flood Risk Assessment Criteria DIAGRAMMATIC.doc Table A shows how measures of event likelihood and flood consequence are combined to produce a measure of flood risk.
Table A – Derivation of Flood Risk from Likelihood and Consequences Likelihood of Consequence of Flooding Flooding Negligible Low Medium High
Low Very Low Very Low Low Medium Medium Very Low Low Medium High High Low Medium High High
Table B shows how measures of receptor vulnerability and flood hazard are combined to produce a measure of flood consequence.
Table B – Derivation of Flood Consequence from Hazard and Vulnerability Flood Vulnerability of Receptor Hazard Water Compatible Less Vulnerable More Vulnerable Highly Vulnerable
Negligible Negligible Negligible Negligible Negligible Low Negligible Low Low Medium Medium Low Medium Medium High High Medium Medium High High Very High Medium High High High
Table C shows how velocity and depth of flooding are taken into account to produce a measure of flood hazard, based on EA/DEFRA Research & Development Technical Report FD2320/TR2 (Oct 2005).
Table C – Derivation of Flood Hazard from Depth and Velocity Flooding Conditions Flood Hazard
No flooding on-site. Negligible Some flooding on-site. Not affecting buildings. Negligible flood flows. Low Dry access/egress routes. Inundation of the site below 600 mm. Slack floodwaters with either very Medium low velocities or on the edge of the floodplain. Easy access and egress. Depths of inundation up to 600 mm. Floodwater flowing across site at speeds of >0.15 m/s. Access/egress possible but may be through High floodwaters. High depths of inundation (>600 mm). High velocities of floodwater entering the site (>0.15 m/sec for residential, >0.3 m/sec for Very High commercial). Restricted access/ egress to the site.
P:\Legislation & Guidance\Flood Risk\NPPF\NPPF Flood Risk Assessment Criteria DIAGRAMMATIC.doc Hanson UK Flood Risk Assessment, Newington Quarry Final
APPENDIX 1038/FRA-02/A3
Newington Site Emergency Response Plan
March 2015
P:\Projects\Newington\Newington 14\Reports\FRA-02\Final\FRA-02 Final v2.doc
Hanson UK Corporate Procedure Revised 24/09/14 Site Emergency Response Plan Reviewed
HANSON UK
SITE EMERGENCY RESPONSE PLAN
SITE DETAILS :
Name: NEWINGTON / MISSON QUARRY
Address: NORTH OF BAWTRY ROAD, MISSON DN10 6DW
TEL: in hours: 01302 7770226
TEL: out of hours: 0800 5870 999 07792 733204
Document Number UKCP09.F1 Page 1 of 16 Hanson UK Corporate Procedure Site Emergency Response Plan Contact Information
Hanson Contacts Name Number Emergency Contacts Number STEVE Site Supervisor CAWSTON 07583 513932 Emergency Services: 999 General Foreman MARK LARKIN 07881 900188 Local Police: 01142 202020
Site Manager MARK HUGHES 07792 33204 Hospital/Doctor: 01302 366666
Responsible Manager: STEWART LAWS 07881 900137 Environment Agency Hotline: 0800 807060 Area operations manager JOHN AUSTIN 07881 900138 Environment Regulator (Local Office): 03708 506 506 Head of Environment: MARTIN CROW 01454334718 Floodline 0845-988 1188 GRAHAM SHE Advisor DUNWELL 07843 075362 : SHE Manager NIGEL CLAMP 07896 293557
Engineering Manager: PAUL NEWBURY 07970 466479 Emergency Procedures Other Contacts Office Hours Out of Hours Local Authority: NOTTS CC 0115 977 4904 Sewer Provider: N/A Water Supplier: ANGLIAN 08457 145 145 0800 771 881 Gas Supplier: N/A Electricity Supplier: 0845 724 0240 0845 724 0240 Waste Management: BIFFA 07736 598849 Specialist Advice: DV Howells as the emergency spill response provider to Hanson UK. They aim Spill and clean-up contractors: to be on-site within 2 hours of a callout and have a 24/7 emergency response call out centre who can be contacted on 01646 697041 or 08700 7377 6673 . Local Contact: D V Howells –
Site Evacuation / Assembly In the event of an emergency, areas of the site may need to be evacuated. Upon the alarm being raise all personnel must calmly make their way to the muster point near canteen
All personnel must remain at this point until a head count has been completed and you receive clear instruction to return to your areas of work.
Contacting the Emergency Services In the event of an incident requiring the emergency services. Contact the Emergency Services on 999. If asked give the Site telephone number 01302 770226 or a mobile number.
Our Full Address is: Misson West / Newington Quarry North of Bawtry Road Misson DN10 6DW
Document Number UKCP09.F1 Page 2 of 16
Hanson UK Corporate Procedure Site Emergency Response Plan Clearly state which Emergency Service is require, giving clear, concise reasons for the need. If possible arrange for a person to be located at the entrance to the site, so that the emergency vehicles can be swiftly directed on their arrival. In the event of an Emergency (Out of Hours) the same principles apply. Once the emergency services have been contacted and all persons are in a safe location the Works Manager and other members of the Management Team must be contacted.
Site and Drain Plan (if format too large to add below identify plan location and provide reference)
Document Number UKCP09.F1 Page 3 of 16
Hanson UK Corporate Procedure Site Emergency Response Plan Chemical Inventory – maximum quantities at peak times
How to protect from Solid/liquid Container Max a flood Trade Name Substance gas/powder Size Quantity (O.K, move to ?, cover, tie down) GAS OIL RED DIESEL L 5,000 4,800 FULLY LTRS LTRS BUNDED
Document Number UKCP09.F1 Page 4 of 16
Hanson UK Corporate Procedure Site Emergency Response Plan Flood Plan
Functions to Contact Telephone Fax GENERAL FOREMAN 07881 900188 UNIT MANAGER 07881 900138 Material Deliveries: IT:
Staff Requiring Evacuation Assistance Location on Site (state if not applicable N/A) N/A N/A
Service Isolation procedure (state if not applicable N/A) Electricity LOCK OFF IN OFFICE Gas N/A Water N/A Sewage N/A
Equipment Protection Priority Protective Action Required
N/A N/A
Emergency Materials Material Purpose Located OIL ABSORBENT SPILLAGE CONTAINMENT AND CLEAN UP SEE SITE PLAN BOOMS, PADS AND GRANULES SAND SPILLAGE CONTAINMENT AND CLEAN UP SEE SITE PLAN
Flood service Aid Organization Contact Name Telephone Specialist clean-up BREAMAR HOWELLS TONY POWELL 08700 73776673 01234 762799 Water pump hire SLD PUMPS STEVE BOOTH 0800 146763 Emergency Power SLD PUMPS STEVE BOOTH 0800 146763 Equipment Hire SPEEDY HIRE / HEWDENS LOCAL BRANCH 0845 8505101
Document Number UKCP09.F1 Page 5 of 16
Hanson UK Corporate Procedure Site Emergency Response Plan
Environmental Procedures
Any persons causing or discovering a spillage of fuel or chemicals/ uncontrolled emission to atmosphere/ contamination of water system/ or any other environmentally harmful event should: -
1) Keep people at a safe distance and observe all safety precautions, e.g. No smoking/naked lights etc.
2) If practical and safe to do so, isolate, stop and treat the cause of the spillage / emission / contamination using appropriate techniques and materials.
3) Immediately inform the Site Management Team of the situation (see Contact details)
4) The Manager / Supervisor will then follow the Environmental Emergency Procedure as below:
In ALL Incidents: • Proceed to the incident and assume control of the situation. • Check all personnel are safe and following health and safety guidelines detailed in the COSHH register and managers rules. • Ensure the Duty of Care and Hazardous Waste Regulations are strictly adhered to. • Inform all necessary persons and authorities of the incident. • Ensure an Incident Report is completed and Emergency Investigation is carried out.
Spillage of fuels, chemicals and other environmentally damaging substances: • Ensure the source of the spillage has been isolated. • Assess the nature, severity and clean-up/remediation options for the spillage. Control the spread of the substance to the minimum possible area by the use of appropriate spill control materials
Uncontrolled emission to atmosphere: - • Ensure the source of the emission has been isolated and stopped if possible. • Assess the nature, severity and clean-up/remediation options for the emission. • In the event of dust emissions leaving the site that are likely to have an effect on the local community, the Site / Works Manager is responsible for contacting the Local Authority Environmental Health Officer without delay
Contamination of water systems: - • Ensure the system is not discharging into a watercourse or groundwater. • Assess the nature, severity and clean-up/remediation options for the contamination. • Contact the Environment Agency if discharge enters water courses
Document Number UKCP09.F1 Page 6 of 16
Hanson UK Corporate Procedure Site Emergency Response Plan
Environmental Instructions Pollutant Instruction Suspended If possible, stop the discharge. If storage capacity is limited or if discharge Solids cannot be stopped, arrange for a gully sucker/licensed waste tanker to empty the system as soon as possible.
Fat/Oil/Grease Deploy absorbing pads/materials onto the area contaminated. (FOG) Upon entering a water system deploy a boom to contain the FOG and prevent it spreading.
If there is evidence of water course contamination deploy a boom across the watercourse downstream of the discharge point.
Acid/Alkali Deploy absorbing pads/materials onto the area contaminated.
Upon entering a water system contain the pollution if possible by stopping any discharge. Add a neutralising agent into the pit/lagoon until the pH is within the discharge consent.
Typically the pH should be between 6 and 9.
Other Consult COSHH data sheets and seek specialist advice.
Disposal Instructions Material Instruction Suspended Place the water contaminated with solids in a contained settlement area on Solids site (eg. Silt pond) or dispose via a licensed site.
Fat/Oil/Grease All contaminated materials come under the Hazardous Waste Regulations and must be disposed of by a correctly licensed contractor. This will involve the use of a Consignment Note.
Acid/Alkali Small spills can be placed in an empty waste battery skip. Large spills – consult the Environment Agency prior to disposal.
Other Seek specialist advise prior to disposal
Document Number UKCP09.F1 Page 7 of 16
Hanson UK Corporate Procedure Site Emergency Response Plan
Hanson UK Emergency Communications Procedure
This emergency communications procedure is designed to ensure serious incidents or accidents are properly communicated, both internally and externally. The over-riding principle is that if your line manager is not contactable, it is your responsibility to speak to the next person up the chain of command to ensure the communication flow is not broken.
Site Level When an incident occurs it is the responsibility and first priority of the Site/Plant Manager or Supervisor – or those in authority at the scene of the incident – to alert the emergency services if necessary. The site/plant manager must also inform their line manager and/or area manager, the area health and safety adviser and the PR and communications manager.
Where personal injury is involved, it is the responsibility of senior site-based staff, in close liaison with senior management (and if appropriate the police), to ensure that the family and next of kin are informed. This may involve a visit to their home if necessary
In all cases, at the earliest opportunity, procedure UKSP16 Reporting of Incidents must be followed with any required internal communication carried out using UKSP16.G2 Reporting Protocol
Document Number UKCP09.F1 Page 8 of 16
Hanson UK Corporate Procedure Site Emergency Response Plan
Head Count Register
During Office Hours - Obtain a live printout from any attendance system to assist with the head count.
Out of Hours - Use the attached headcount register to account for all personnel on site.
Always ensure the visitors and contractors signing in books are included in headcounts.
SIGNING IN BOOK TO BE USED INSTEAD
Believed Believed Accounted Accounted to be on to be on Employees For Last Seen Employees For Last Seen site site Temporary Workers
Visitors
Contractors
Hauliers
Document Number UKCP09.F1 Page 9 of 16
Hanson UK Corporate Procedure Site Emergency Response Plan
Site Specific Information
Site: NEWINGTON QUARRY Comments MISSON QUARRY Accident & Near Miss reporting All accidents and near miss must be reported Asbestos None on site Automated Plant and Robots None on site Blasting procedures N/A Confined Spaces None on site Corrosive / Toxic materials None on site Dust/Silica Present on site Electricity Buried cables as plan. OVERHEAD CABLES ALONGSIDE SLAYNES LANE and north end of site Emergency Procedures Report to foreman, procedures on notice boards Fire Risk Areas None Flammable Gases None Flammable Liquids GAS OIL - LUBRICANTS Fragile Roofs None Fumes / Gases Welding equipment if on site High Risk Areas NONE High Pressure water Jetting None Hours of Work 0700-1600 Mon-Fri Isolation / Lock off Procedure All plant must be locked off using personal locks if guards removed Lagoons and Pits Deep excavations and lagoons Noise Hazards Screening plant when running Pressurised plant / Systems None Site Boundaries and Excavations See site plans Vehicle Movements SLAYNES LANE IS A PUBLIC RIGHT OF WAY – GIVE WAY. Welfare Facilities Toilets etc. in office block Working at Height Observe Excavation rules in quarry – high faces
Environmental: - See site impact reports relating to specific job Planning/Permit Restrictions See hours of work and site document file. All Lorries turn left. Sensitive Receptors/Neighbours Misson Village close by
Document Number UKCP09.F1 Page 10 of 16
Hanson UK Corporate Procedure Site Emergency Response Plan
UNCONTROLLED DUST EMISSIONS Anyone causing or discovering an emission:-
1) Immediately if practical and safe to do so, isolate and stop the cause of the emission. If not possible or the emission is continuing inform Responsible Manager / Foreman of the situation
2) If / when emission under control inform Responsible Manager / Foreman as soon as possible.
3) Clean up ANY spillage as soon as practicable (same day). Where this is not possible contact Responsible Manager to arrange relief for cleaning to be completed.
Duty manager / Foreman / Plant Supervisor will:-
1) Proceed to the incident and assume control of the situation checking all personnel are safe and following any health and safety guidelines.
2) Ensure that the source of the spillage has been isolated, and stopped if possible. Where not consult UKCP09F1 – Site Emergency Response Plan for emergency responder contacts and outline spillage details and the substance involved.
3) Contact Emergency Services / Specialist Contractors if / as required ensuring further information is available from the COSHH data.
4) If an emission of dust to air has resulted in / or has caused a spillage, condition with water if safe to do so.
5) Where emissions are caused by material being whipped from surfaced areas or haul roads, then damp down using sprays / water bowser and arrange for a road sweeper to attend site immediately.
6) Follow UKSP16 - Reporting Incidents and Regulator Visits and ensure a record of the incident is reported using Entropy.
7) Contact the site Regulator (EHO, EA) if the emission has breached the site boundary.
8) Clean up ANY spillage as soon as practicable (same day). Where this is not possible contact Responsible Manager to arrange relief for cleaning to be completed.
Document Number UKCP09.F1 Page 11 of 16
Hanson UK Corporate Procedure Site Emergency Response Plan
CONTAMINATION OF WATER SYSTEM Any Person Discovering Contamination:-
1) Immediately if practical and safe to do so ensure the system is not discharging into a watercourse by closing valve(s) or switching off the pump(s). If not possible or the emission is continuing inform Responsible Manager / Foreman of the situation
2) If / when emission under control inform Responsible Manager / Foreman as soon as possible.
Duty manager / Foreman / Plant Supervisor will:-
1) Proceed to the incident and assume control of the situation checking all personnel are safe and following any health and safety guidelines.
2) Ensure that any source of the contamination has been isolated, and stopped / contained if possible. Where not consult UKCP09F1 – Site Emergency Response Plan for emergency responder contacts and outline spillage details and the substance involved.
3) Contact Emergency Services / Specialist Contractors if / as required ensuring further information is available from the COSHH data available.
4) If a spillage is the pollution source protect all potentially affected drains / discharge outlets and contain on site with additional consideration as follows:
Suspended Solids - If possible, stop the discharge. If storage capacity is limited or if discharge cannot be stopped, arrange for a gully sucker / licensed waste tanker to empty the system as soon as possible and dispose via a licensed site. Fat/Oil/Grease (FOG) - Deploy absorbing pads / spill media onto the area contaminated. At discharge point entering a water system deploy boom to contain the FOG and prevent spreading. All contaminated materials come under the Hazardous Waste Regulations and must be disposed of by a correctly licensed contractor. If there is evidence of water course contamination deploy a boom across the watercourse downstream of the discharge point. Acid/Alkali - Deploy absorbing pads / spill media onto the area contaminated. At discharge point entering water system contain the pollution if possible by stopping any discharge. Add a neutralising agent into the pit / lagoon until the pH is within the discharge consent limit. Small spills can be placed in an empty waste battery skip. Large spills – consult the Environment Agency prior to disposal.
9) Follow UKSP16 - Reporting Incidents and Regulator Visits and ensure a record of the incident is reported using Entropy.
5) Contact the Environment agency if the discharge has / potentially polluted watercourses and / or ground water.
6) Clean up ANY spillage as soon as practicable (same day) and segregate contaminated spill media for disposal. Where this is not possible contact Responsible Manager to arrange relief for cleaning to be completed
Document Number UKCP09.F1 Page 12 of 16
Hanson UK Corporate Procedure Site Emergency Response Plan
SPILLAGES OF FUEL AND CHEMICALS Any persons causing or discovering a spillage:-
1) Keep people at a safe distance and observe all safety precautions, e.g. No smoking/naked lights etc.
2) Immediately if practical and safe to do so isolate and stop the cause of the spillage and treat it with the appropriate absorbent materials. If not possible or the emission is continuing inform Responsible Manager / Foreman of the situation
3) If / when emission under control inform Responsible Manager / Foreman as soon as possible.
Duty manager / Foreman / Plant Supervisor will:-
1) Proceed to the incident and assume control of the situation checking all personnel are safe and following any health and safety guidelines.
2) Ensure that any source of the contamination has been isolated, and stopped / contained if possible. Where not consult UKCP09F1 – Site Emergency Response Plan for emergency responder contacts and outline spillage details and the substance involved.
3) Contact Emergency Services / Specialist Contractors if / as required ensuring further information is available from the COSHH data.
4) Control the spread of the substance to the minimum possible area by the use of sand / dust bunds or appropriate absorbing media detailed on the Emergency Data Sheet ensuring that every effort is made to prevent the spillage entering any surface water treatment system, site dewatering system, local watercourse or groundwater.
5) If the spillage enters any water treatment system, refer to UKCP09 CONTAMINATION OF WATER SYSTEM.
6) Follow UKSP16 - Reporting Incidents and Regulator Visits and ensure a record of the incident is reported using Entropy.
7) Once the spillage has been fully absorbed, all contaminated materials must be contained and segregated to prevent further pollution in suitable containment ready for disposal by a licensed waste contractor
Document Number UKCP09.F1 Page 13 of 16
Hanson UK Corporate Procedure Site Emergency Response Plan
ACTIONS TO BE TAKEN ON DISCOVERY OF FIRE/EXPLOSION Any persons causing or discovering a fire on site must:-
1) Inform immediately all personnel working in the area.
2) If practical to do so, telephone the emergency services, dial 999, and ask for FIRE giving:
Unit Address: Misson West / Newington Quarry North of Bawtry Road Misson DN10 6DW
Telephone Number: 01302 770226
3) All personnel will retire to a place of safety. If practical and safe to do so trained personnel may fight the fire, using locally available fire fighting apparatus.
Duty manager / Foreman / Plant Supervisor will:- Immediately complete the following actions:
1) If the person discovering the fire has not done so - telephone the emergency services, Dial 999 and ask for FIRE . Give unit address/telephone number and all relevant details of incident: AS ABOVE
2) Nominate a person to go to Site Entrance to direct Emergency Service vehicles to site of incident.
3) Inform site personnel.
4) Inform the Unit Manager.
5) Proceed to site of incident and assume control of situation, ensuring: All personnel are safe All reasonable actions to fight fire are completed Emergency services are briefed on arrival
Document Number UKCP09.F1 Page 14 of 16
Hanson UK Corporate Procedure Site Emergency Response Plan
ACTIONS TO BE TAKEN ON DISCOVERY OF A CASUALTY [INJURY OR ILLNESS] Any persons discovering a casualty on site must immediately:-
1) Contact a qualified First Aider to attend to the casualty.
2) If practical to do so, telephone the emergency services, dial 999, and ask for AMBULANCE giving:
Unit Address: Misson West / Newington Quarry North of Bawtry Road Misson DN10 6DW
Telephone Number: 01302 770226
3) Inform Plant Supervisor. Give details and location of casualty.
4) Return to casualty and either assist the qualified First Aider as required/directed or, if no qualified First Aider is in attendance , make the casualty as comfortable as possible given the particular circumstances and your first aid knowledge and experience .
Duty manager / Foreman / Plant Supervisor will:- Immediately complete the following actions:
1) If the person discovering the fire has not done so - telephone the emergency services, dial 999 and ask for AMBULANCE Give unit address/telephone number and all relevant details of incident: AS ABOVE
2) Nominate a person to go to Site Entrance to direct emergency service vehicles to site of casualty.
3) Inform site personnel
4) Inform the District Operations Manager
5) Proceed to site of incident and assume control of situation ensuring:- All possible aid is given to casualty No other personnel are at risk of injury Emergency services are briefed on arrival
Document Number UKCP09.F1 Page 15 of 16
Hanson UK Corporate Procedure Site Emergency Response Plan
ACTIONS TO BE TAKEN ON DISCOVERY OF SUSPICIOUS UNIDENTIFIED OBJECT (eg SUSPECTED ORDINANCE) Any persons discovering a suspicious object on site must immediately:-
1) Warn other personnel to clear the area.
2) Switch off nearby machinery, if practical to do so.
3) Inform District Operations Manager: Tel: 07881 900138
4) Keep clear of area.
5) DO NOT TOUCH OR ATTEMPT TO MOVE ANY SUSPICIOUS UNIDENTIFIED OBJECT
Duty manager / Foreman / Plant Supervisor will:- Immediately complete the following actions:
1) Telephone the Emergency services - dial 999 and ask for POLICE GIVING
Unit Address: Misson West / Newington Quarry North of Bawtry Road Misson DN10 6DW
Telephone Number: 01302 770226 and any relevant details of casualty
2) Inform District Operations Manager of incident.
3) Inform Site Personnel.
4) Nominate a person to go to entrance to direct Emergency Service vehicles.
5) Proceed to area of incident and assume control of situation, ensuring: All personnel are kept away from site of object Area is cordoned off All vehicles are removed from area All office/workshop areas/control rooms are evacuated
Document Number UKCP09.F1 Page 16 of 16