FLOOD RISK ASSESSMENT
RIPLINGHAM QUARRY, WESTOBY ROAD, RIPLINGHAM
Stoneledge Plant and Transport Ltd November 2020 P17-1222
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PLANNING APPLICATION FOR EXTENSION TO RIPLINGHAM QUARRY
FLOOD RISK ASSESSMENT
RIPLINGHAM QUARRY, WESTOBY ROAD, RIPLINGHAM
ON BEHALF OF STONELEDGE PLANT AND TRANSPORT LTD
Riplingham Quarry Stoneledge Plant and Transport Ltd Flood Risk Assessment
CONTENTS:
Page No:
1. INTRODUCTION 1 2. EXISTING SITE AND HYDROLOGY 4 3. PROPOSED DEVELOPMENT 6 4. DEVELOPMENT VULNERABILITY AND FLOOD ZONE CLASSIFICATION 7 5. SITE SPECIFIC FLOODING ISSUES AND EXISTING FLOOD RECORDS 9 6. FLOOD DEFENCES AND MITIGATION 16 7. DRAINAGE OVERVIEW 17 8. SUMMARY 18
FIGURES & TABLES
FIGURE 2.1: SITE LOCATION PLAN FIGURE 5.1: EA FLOOD MAP FIGURE 5.2: EA SURFACE WATER FLOOD MAP FIGURE 5.3: EA RESERVOIR FLOOD MAP TABLE 4.1: NPPF GUIDANCE TABLE 5.1: FLOOD RISK TO THE SITE FROM ALL SOURCES
APPENDICES
APPENDIX A PROPOSED LANDSCAPE MASTERPLAN APPENDIX B DRAINAGE OVERVIEW
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Riplingham Quarry Stoneledge Plant and Transport Ltd Flood Risk Assessment
1. INTRODUCTION
Background
1.1 Pegasus Planning Group Ltd has been appointed by Stoneledge Plant and Transport Ltd (herein referred to as “the Applicant”) to undertake a Flood Risk Assessment (FRA) for a proposed extension to an existing quarry at Riplingham Quarry, Westoby Road, Riplingham.
1.2 This assessment considers the risks of all types of flooding to the site including tidal, fluvial, surface, historic, groundwater, sewer and artificial sources. No foul water will be produced by the development.
National and Local Policies
1.3 The National Planning Policy Framework (NPPF) states that a site-specific Flood Risk Assessment will be required for proposals:
a) that are greater than 1 hectare in area within Flood Zone 1;
b) for all proposals for new development (including minor development and change of use) in Flood Zones 2 and 3;
c) in an area within Flood Zone 1 which has critical drainage problems; and where proposed development or a change of use to a more vulnerable class may be subject to other sources of flooding.
d) in an area within Flood Zone 1 identified in a Strategic Flood Risk Assessment as being at increased flood risk in the future.
e) in an area in Flood Zone 1 that may be subject to other sources of flooding, where its development would introduce a more vulnerable use.
1.4 The site is located within Flood Zone 1 and is larger than 1ha. therefore, it requires an FRA in accordance with NPPF.
1.5 As of April 2015, the legislation for dealing with FRAs changed, with additional emphasis put on the use of Sustainable Drainage Systems (SuDS) within drainage schemes for new developments.
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1.6 In February 2016, the Environment Agency (EA) introduced new guidance relating to climate change allowance, which has increased the percentage rate of change applied to the 1 in 100 year event scenario.
1.7 As such, any new application will require a surface water drainage scheme submitted to accompany all planning applications and will be required to demonstrate the use of SuDS within the design and should be in line with the requirements as set out within the National Planning Policy Framework Technical Guidance (NPPFTG).
1.8 The following report has been based on information and requirements derived from NPPF, NPPFTG, the British Geological Survey (BGS), the EA planning maps.
1.9 This assessment has also reviewed the requirements of the East Riding of Yorkshire Council Level 1 Strategic Flood Risk Assessment (SFRA) dated November 2019.
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Strategic Flood Risk Assessment
1.10 Capita undertook a Level 1 Strategic Flood Risk Assessment (SFRA) in November 2019 on behalf of East Riding of Yorkshire Council.
1.11 This report is used to inform any site within the catchment area that requires a site-specific FRA.
1.12 The main purpose of the SFRA is to:
- determine the variations in risk from all sources of flooding across the area, and the risks to and from surrounding areas in the same flood catchment;
- inform the sustainability appraisal of the Local Plan, so that flood risk is fully taken into account when considering allocation options and in the preparation of plan policies including policies for flood risk management to ensure that flood risk is not increased;
- allow the application of the Sequential Test when determining land use allocations;
- identify the requirements for site-specific flood risk assessments in particular locations, including those at risk from sources other than river and sea flooding;
- determine the acceptability of flood risk in relation to emergency planning capability; and
- consider opportunities to reduce flood risk to existing communities and developments through better management of surface water, provision for conveyance and of storage for flood water.
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2. EXISTING SITE AND HYDROLOGY
Site Location & Existing Conditions
2.1 The site area is approximately 3.78 Ha in overall size and is a greenfield site.
2.2 The site consists of an open field with trees, shrubs and grass, and areas of stored excavated material. It is accessed from an existing track leading from Westoby Lane towards the north east of the site. The site is bounded by agricultural land running along the south east and north east boundary. The existing Riplingham Quarry bounds the site to the north west and south west boundary. Westoby Lane leads north to High Hunsley and south to Riplingham.
2.3 Approximately 1.84km beyond the site boundary to the west is a watercourse called Dewton Springs which leads into Primrose Spring.
2.4 Approximate site co-ordinates are E: 495494; N: 433433, with the nearest post code HU20 3UP. The site is located off Westoby Lane, Riplingham.
2.5 The Environment Agency flood map shows the entire site as lying within Flood Zone 1 (<1:1000 year probability of flooding).
2.6 A copy of the EA flood map can be found at Section 5 of this report.
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Figure 2.1 – Site Location
The Avenue (B1230)
Primrose Spring
Westoby Lane
Drewton Springs
2.7 A topographical survey has been undertaken which indicates that the site generally falls from south-east to north-west, with levels ranging from approximately 123m AOD in the south east to approximately 102m AOD to the north-west where the site then falls away sharply to the existing quarry level of approximately 80m AOD.
Existing Drainage and Hydrology
2.8 There are no existing water bodies within or near the site.
2.9 There are believed to be existing sewer system networks within Westoby Lane, however, public sewer records have not been requested at this stage.
2.10 Geological data held by the British Geological Survey (BGS) indicates that the bedrock geology underlying the site is a mix of both “Burnham Chalk Formation” and "Welton Chalk Formation" chalk, set in warm chalk seas.
2.11 The soilscape soils data shows the site as "Freely draining lime-rich loamy soils".
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3. PROPOSED DEVELOPMENT
3.1 It is proposed that the site be used for the extraction of minerals. The development proposes an extension to the existing Riplingham Quarry for the extraction of chalk.
3.2 The site will function as per the existing site arrangements and it is not envisaged this will intensify any on-site operations.
3.3 The existing site area is a ‘greenfield’ development with a few areas of stored excavated material, an access track and with trees and vegetation lining the perimeter boundaries, therefore the majority of the site is considered to be permeable. The nature of the development is to excavate the material, there will be no areas of an impermeable nature as part of the proposed development.
3.4 The site will be accessed by an existing entrance along Westoby Lane to the north east.
3.5 A copy of the landscape master plan can be found at Appendix A.
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4. DEVELOPMENT VULNERABILITY AND FLOOD ZONE CLASSIFICATION
National Planning Policy Framework (NPPF)
4.1 Local Planning Authorities, (LPA) have a statutory obligation to consult the Environment Agency, (EA) on all applications in flood risk zones. The EA will consider the effects of flood risk in accordance with the NPPF.
4.2 NPPF requires that, as part of the planning process:
• A ‘site specific’ Flood Risk Assessment will be undertaken for any site that has a flood risk potential.
• Flood risk potential is minimised by applying a 'sequential approach' to locating 'vulnerable' land uses.
• Sustainable drainage systems are used for surface water disposal where practical.
• Flood risk is managed through the use of flood resilient and resistant techniques.
• Residual risk is identified and safely managed.
4.3 Table 1 of NPPF, categorises flood zones into:
• Zone 1- Low probability (< 1 in 1000 years)
• Zone 2- Medium probability (1 in 1000 - 1 in 100 years)
• Zone 3a- High probability (> 1 in 100 years)
• Zone 3b- The functional floodplain (>1 in 20 years)
4.4 The NPPF sets out a matrix indicating the types of development that are acceptable in different Flood Zones (see Table 4.1). The proposed development is an extension to an existing quarry and is located entirely in Flood Zone 1 and therefore, development in this area is considered appropriate.
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4.5 NPPF also categorises types of development into Flood Risk Vulnerability groups (FRVG). NPPF does not specifically categorise quarries into a FRVG, however, given the type of development it is fair to conclude that the development can be classified as ‘more vulnerable’ during operation hours where personnel are present on site but also 'less vulnerable' when there are no personnel on site out of operational hours.
Table 4.1 – NPPF Guidance
Flood Flood Risk Vulnerability Classification Zones
Essential Highly More Less Water Infrastructure Vulnerable Vulnerable Vulnerable Compatible
Zone 1
Zone 2 Exception Test Required
Zone 3a Exception Exception Exception Test Required Test Test Required Required
Zone 3b Exception Test Required
Sequential test
4.6 The development lies within Flood Zone 1 therefore the sequential test is deemed to have been passed.
Exception Test
4.7 In accordance with the NPPF guidance the exception test is not required.
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5. SITE SPECIFIC FLOODING ISSUES AND EXISTING FLOOD RECORDS
5.1 Local Planning Authorities, (LPA) have a statutory obligation to consult the Environment Agency, (EA) on all applications in flood risk zones. The EA will consider the effects of flood risk in accordance with the NPPF.
National Planning Policy Framework (NPPF)
5.2 In accordance with the National Planning Policy Framework, this Flood Risk Assessment considers all sources of flooding including:
a) Tidal Flooding – from sea; b) Fluvial Flooding – from rivers and streams; c) Pluvial Flooding – overland surface water flow and exceedance; d) Historic flooding – known historic flooding issues; e) Groundwater flooding – from elevated groundwater levels or springs; f) Flooding from sewers – exceedance flows from existing sewer systems; and g) Artificial sources – reservoirs, canals etc.
Tidal Flooding
5.3 The Environment Agency website provides basic flood mapping data as a general guide to whether a site is at risk of flooding from various sources including rivers and seas for Flood Zoning classification.
5.4 This mapping (Figure 5.1) indicates that the site is located within Flood Zone 1, an area with a low probability of flooding occurring (<1:1000 yr).
5.5 Given the above the risk to the site from this source of flooding is considered to be Very Low.
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Riplingham Quarry Stoneledge Plant and Transport Ltd Flood Risk Assessment
Figure 5.1 – Environment Agency Flood Map
Fluvial Flooding
5.6 The site is entirely in Flood Zone 1, an area with a low probability of river flooding (<1:1000 yr).
5.7 Given the above Fluvial Flood risk to the site is Very Low.
Pluvial Flooding
5.8 The Surface Water (Pluvial) Flood Map (Figure 5.2) indicates that the site is at a very low risk from surface water flooding. There are some areas of high and medium risk indicated outside of the site boundary within the existing quarry.
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Riplingham Quarry Stoneledge Plant and Transport Ltd Flood Risk Assessment
Figure 5.2 – Environment Agency Surface Flooding Map
5.9 It Is likely that the areas of high and medium risk within the existing Riplingham Quarry are shown due to the reduced levels within the site and appear to convey flows towards the Drewton Springs to the west. The proposed development will incorporate existing quarry conditions for the removal of any surface water run-off.
5.10 Therefore, the development is considered to be at low risk of flooding from surface water flows.
Historic Flooding
5.11 The SFRA notes the following as a response to past flooding:
Whilst flood records are a valuable tool for understanding the past behaviours and magnitudes of flooding, it is important to acknowledge that actions such as the installation of flood defence schemes may have been taken since the flooding event to improve flood risk and, as such, areas that suffered from flooding in the past
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may no longer be at risk or may now only be at risk from events of a lower frequency than that suffered previously.
5.12 The SFRA has listed the following as major flood events since 1947:
- March 1947 (The River Wharf, Aire, Derwent and Don)
- January 1953 (East coast of Scotland and England)
- November (River Derwent near Wressle)
- June 2007 (East Riding – Prolonged Rainfall)
- August 2011 (Goole)
- February 2012 (Cottingham)
- April 2012 (Pocklington)
- July 2012 (Goole and Swinefleet)
- Winter 2012 (Burton Fleming, Kilham Village, Kelleythorpe and Driffield)
- December 2013 (East Riding – Tidal Surge Flood Event)
- July 2014 (Cottingham, Market Weighton and South Cave)
- August 2014 (East Riding - Ex Hurricane Bertha)
- 2015-2016 (East Riding – Winter Flooding)
- January 2017 (East Riding – Coastal)
- August 2017 (East Coast)
5.13 It should be noted from the recorded events above that the site and surrounding areas have not been historically affected by flooding. The closest location is South Cave which is some 3.5km south west of the site.
5.14 It is therefore considered that historic flooding at this site is Very Low.
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Groundwater Flooding
5.15 The SFRA provides mapping that shows no risk of flooding from groundwater in the site or surrounding areas. There are no known reports of flooding at this site occurring from groundwater.
5.16 The nature of the site is to excavate material to significant depth from surface levels, groundwater may be encountered during this process however, as this is an extension to an existing quarry, it would be considered that any potential for groundwater to occur is known and can be avoided / mitigated.
5.17 The risk of flooding from groundwater at this stage is considered to be Low.
Flooding from Sewers
Flooding from Adopted Sewers
5.18 The site is within open fields and no known flooding from this source is known to have been reported/recorded in the area.
Flooding from Private Drainage
5.19 The site is within open fields, the nearest dwelling is 400m to the north west called Worlds Way Holiday Cottages and is made up of a few dwellings.
5.20 Therefore, the risk of sewer flooding to the site is therefore considered to be Very Low.
Flooding from Artificial Sources
5.21 From the EA map in Figure 5.3, it can be seen that there is no risk from reservoirs flooding the site.
5.22 Therefore, the risk of flooding is from this source is considered to be Very Low.
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Riplingham Quarry Stoneledge Plant and Transport Ltd Flood Risk Assessment
Figure 5.3 – Environment Agency Flooding from Reservoir Map
Post Development Residual Flood Risk Summary
5.23 The risk of flooding is summarised in Table 5.1:
Table 5.1 – Flood Risk to the site from all sources
Flood Source Flood Risk Mitigation/Comments
Tidal Very Low • The site is in Flood Zone 1 and is currently not at risk from Tidal Flooding.
Fluvial Very Low • The site is in Flood Zone 1 and is currently not at risk from Fluvial Flooding.
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Pluvial Low • The EA flood maps show the site has a very low - low probability of flooding from surface water, with small areas outside of the site boundary highlighted.
• Surface water to be managed in line with the existing quarry arrangements.
Historic Very Low • The Level 1 SFRA shows the site has not been recorded as being flooded from any source.
Groundwater Low • The site is underlain by Bedrock geology of Chalk.
Sewers Very Low • The sites are within green fields away from known sewer runs. The site will be naturally drained with no positive drainage system present.
Artificial Very Low • There is no flood risk from reservoir flooding.
• Mapping data from the EA indicates no flooding near or within the vicinity of the site.
Access & Egress
5.24 The site is for an extension to a quarry which will only be manned/occupied during operating times.
5.25 The site is not subject to any form of severe flooding, therefore in the event of an extreme event occurrence, access and egress to/from the site can be easily achieved to higher parts of the site as necessary.
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Riplingham Quarry Stoneledge Plant and Transport Ltd Flood Risk Assessment
6. FLOOD DEFENCES AND MITIGATION
6.1 The SFRA has provided maps with all known flood defences within the settlement areas. There are no defences present within the vicinity of the site.
6.2 The site will need to provide water quality improvements for surface water run-off via the removal of silt and sediments through the use of swales/filter trenches conveying water to a settlement pond/basin.
6.3 No increase in impermeable area is proposed as part of the development, therefore there is no increase to risk of flooding on site or the surrounding area. No mitigation measures are required.
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Riplingham Quarry Stoneledge Plant and Transport Ltd Flood Risk Assessment
7. DRAINAGE OVERVIEW
7.1 Although NPPF guidance requires a sustainable approach to surface water drainage and run-off, it should be recognised that a quarry site is a working site and that materials and plant are moved/removed on a daily basis. To achieve a fully compliant sustainable drainage system would require instillation of permanent features and regularly maintained for their function and lifetime, which are not appropriate for this type of development.
7.2 It is suggested that the surface water strategy is designed to provide water quality improvements via the removal of silt and sediments through the use of swales/filter trenches conveying surface water run-off to a settlement pond/basin prior to discharge to ground/watercourse etc.
7.3 Excess water can/will be pumped as/when necessary to avoid areas of ponding created by the nature of the works.
7.4 As the geological formation at the extraction depth will be chalk it can be considered that some surface water run-off will soakaway directly to ground.
7.5 The proposed development site will not affect the existing permeable areas, and run-off will be as existing greenfield rates, with additional sustainable features added to slow flows and also improve water quality.
7.6 A drainage overview layout can be found at Appendix B.
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8. SUMMARY
8.1 The site is greenfield with no watercourses within the vicinity of the development area.
8.2 It is proposed to redevelop the site as an extension to the existing Riplingham Quarry for the extraction of materials from the ground.
8.3 The site is entirely located within Flood Zone 1.
8.4 The proposed development will not add any areas of impermeable surfacing. Surface water runoff will drain partially to ground, as existing, and in line with existing site arrangements within Riplingham Quarry. Swales or filter tranches can be provided to convey water to settlement ponds.
8.5 This report has determined that the risk of flooding for all sources is low to very low.
8.6 The proposal is considered to accord with the requirements of the National Planning Policy Framework (NPPF) with residual risk to the site fully mitigated, and as such considered low risk.
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Appendix A – Proposed Landscape Masterplan
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.0 115
Site boundary
.0 Tree and hedgerow planting to 115 EXISTING 110.0 surround the site, brought Hedgerow / shrubs forward as part of the main .0 Riplingham quarry proposals 110 Mixed woodland (Refer to drwg P17-1222.002 in .0 relation to planning app no. 115 19/00826/CM) Broadleaved woodland
.0 .0 .0 .0 Trees105 along eastern boundary 110 120 115 retained and protected during Dismantled railway tunnel extraction and backfill Following backfill operations, operations Existing 5m Contours area to be restored to calcareous grassland with PROPOSED levels restored to existing .0 Proposed indicative 5m Contours 105 contours (Refer to drwg P17-1222.002 in relation to .0 planning app no. 19/00826/CM) 110 Calcarious meadowland (Emorsgate EM6 .0 .0 * 115 Meadow mixture for chalk and limestone 105 soils or similar and approved)
Proposed native hedge and hedgerow
.0 trees with double row rabbit proof stock 125 Trees along access track .0 fencing 1m wide. 110 .0 120 retained and protected during .0
105 extraction and backfill .0 Approx cut and fill area operations130
Access tracks
INDICATIVE PLANTING SCHEDULE
Hedgerow planting mix (5/lm) Plant species Size % Acer campestre B 40/60 ht 1+0 5 Corylus avellana B 40-60 ht 1+0 5 Crataegus monogyna B 40-60 ht 1+0 80 Prunus spinosa B 40-60 ht 1+0 3 Rhamnus catharticus B 40-60 ht 1+1 3 - - - - Trees along southern boundary retained and protected during Ulmus glabra B 40/60 ht 1+0 4 Rev Date By Note extraction and backfill operations, with gaps in tree Hedegerow trees plant Size Landscape Masterplan line to replaced with suitable species tree and hedgerow species to .0 Quercus robur B Fthrd 175/200 As shown Riplingham Quarry Extension restore the tree avenue 125
Client: Stoneledge REV: - 105 .0 DRWG No: P17-1222.100 Approved by: HS Drawn by : KG PLANNING | DESIGN | ENVIRONMENT | ECONOMICS 0 20 40 60 80 100 120 m Date: 20/10/20 Copyright Pegasus Planning Group Ltd. Crown copyright, All rights reserved. Emapsite Licence number 0100031673. Ordnance Survey Copyright Licence number 100042093. Promap Licence number 100020449. Pegasus accepts no liability for any use of this document other than for its original purpose, or by the original client, or following Pegasus' express agreement to such use. T 0113 287 8200 www.pegasusgroup.co.uk Scale: 1:2000 @ A3
Riplingham Quarry Stoneledge Plant and Transport Ltd Flood Risk Assessment
Appendix B – Drainage Overview
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Track
122.5 Pond 121.5
120.5
Low119.5 Hunsley House
118.5
117.5
116.5 Pond
115.5
Pump 114.5
111.46 Pump 113.5
113.41 112.5 110.91
119.5 111.5 110.61 116.47 Ep Low Hunsley 118.5 110.02 112.29 122.70 115.43 109.83 118.88
123.33 117.5 117.42 122.22 109.35 120.80 111.26 119.48 114.72 122.91 116.5 124.06 124.89 120.60 109.16 111.12 116.35 119.15 124.14 115.5 110.5 109.96 122.80 108.45 109.62 114.68 118.71 124.70 108.07 114.24 116.27 125.18 116.69 120.18 124.52 114.5 109.19 107.45 113.79 119.01 122.49
Track 114.73 124.31
107.5 121.31 117.30 124.5 124.87 113.5 119.43 125.38
108.07 108.5 121.48 124.37
119.00 123.09 112.5 109.5 109.5 110.48 124.19
113.25 125.11 106.88 110.5
112.5 124.96
111.5 107.26 111.5
106.5 106.21 113.5 116.72 114.5 118.97 121.65 106.00 123.77
124.72 Workings (dis) 109.72 112.99 115.5 105.42 106.32
116.5 121.66
108.5 105.20 116.22 117.5
105.48 118.68 123.62 113.31 118.5 124.16 105.5 109.29
104.96 110.5 104.51 121.61
AREAS NOTED AS BEING 119.5 105.83 113.40 116.41 123.67
118.57 115.5 104.61 120.5 124.41 WATERLOGGED MAY BE 107.5 108.58
103.79 121.43 105.55 121.5 123.60 124.29 116.61 SETTLEMENT PONDS114.5 FOR
103.98 113.08 118.75 122.5 103.05 121.32
104.83 109.23
123.5 124.05 SURFACE WATER RUN-OFF FROM 129.5 113.5 104.5 115.95
109.5 124.36 114.02 128.5 106.5 123.62
SURROUNDING EXCAVATIONS 118.74
112.5 124.83 102.93 121.38 127.5 116.68 108.79 102.05 114.29 DISCHARGE104.22 FROM SETTLEMENT
111.5
102.34 124.23
102.5 POND/BASIN LIKELY TO BE PUMPED119.09
117.19 103.5 101.72 104.5 103.68 108.37 114.09 121.50
103.5 105.5 OFF SITE. GROUND CONDITIONS 123.64 124.69 101.5
101.11 106.5 107.5
105.5 101.55 119.90
100.31 108.5 NOTE SUB STRATA116.84 OF CHALK, IT
103.79 109.5 123.77 112.5
110.5 113.21
108.5 101.5
113.5 108.32 111.5 121.95 CAN BE CONSIDERED THAT SOME 123.92 124.77 107.66 107.60 120.25 100.5 124.70
114.5 116.03 WATER115.5 WILL SOAKAWAY DIRECTLY 99.5 98.23 112.17 122.36 124.81
98.5 97.5 111.82 111.82 TO116.5 GROUND. 124.03
112.16 114.99 120.12 114.23 117.5
83.01
102.5 96.5 122.37
110.5 81.99 124.97 96.53 118.5 114.07 119.79 82.03 124.92
107.5 95.35 78.94 116.83 119.5 115.5 77.82 81.50 113.92 115.53 124.19 Area not accessible 122.27
waterlogged 119.39 75.93 115.08 120.5
114.5 123.90 125.18 72.09 124.5
117.89 118.77 124.94 96.66 121.5 West Hill 105.5 121.85 119.07 70.96 Area not accessible 116.77
113.5 109.5 72.09
97.45 80.73 waterlogged 115.11 123.61 129.5 117.76 130.5
124.93
116.26 106.5 122.5 112.5 121.23
117.52
120.21
123.20 128.5 117.31 123.5 124.49 121.09 117.23 Area not accessible 85.51 85.94
81.09 waterlogged 115.5 111.5 127.5 116.63 81.55 118.36 124.43 86.17 122.61 116.5 96.96 117.63 84.72 122.35 WATER QUALITY IMPROVEMENTS 118.23 79.88 80.95 81.5 123.73 118.72 117.34 104.5 80.62 84.48 118.67 122.35
113.22 119.86 121.24 PROVIDED VIA THE REMOVAL OF 85.5 120.80 118.41 103.5 81.46 118.37 123.56 117.5 81.24 Tippings 118.79 121.15 SILT AND SEDIMENTS THROUGH 82.55 118.58 112.79 120.25 123.33 Track
118.5 108.5 95.90 118.08 81.39 84.5 THE USE OF SWALES/FILTER 117.19 80.67 117.55 114.5 102.5 112.79 119.5 85.54 118.87 TRENCHES CONVEYING SURFACE 81.85 110.5 109.95 Assumed Line Of Bank 121.37 122.08 113.5 79.13 116.92 122.17 120.5 112.79
WATER RUN-OFF TO A 83.5 123.55 101.5 94.95 78.35 105.85 117.22 120.71 112.5 116.56 118.48 SETTLEMENT POND/BASIN. 112.79 115.5 82.27 79.15 78.78 84.32 116.69 117.71 107.5 116.12 112.20 Assumed Line Of Bank
121.5 95.08 116.24
Stockpile 106.04 118.67 79.5
111.5 Stone 78.5
109.5 78.32 80.5
81.5 82.38 82.5 114.99 79.26 79.14 83.79 122.5 116.5 78.98 115.30 79.36 118.08 119.77 113.78 118.49 101.5 82.96 123.5 105.5 114.52 79.15 106.5 79.52 94.22 79.36 73.5 94.38 115.48 72.5 71.04 102.19 114.97
108.5 79.68 112.86 100.5 81.33 74.57 92.50 124.5 117.5 79.23 Overburden 81.74
75.69 110.5 114.53 130.5 114.5 74.5 71.37
93.95 122.5
92.27 104.5 83.5 118.5 75.62 79.08 113.31 107.74 115.44 78.5 71.5 103.5 112.38 75.5 72.78 83.00 112.38 77.5 84.30 106.57 Und 113.70 70.52
119.5 84.59 76.5 70.15 72.75
113.5 FencePost 1.3m & Wire High Assumed Line Of Bank 112.5 93.13 85.583.37 102.5 120.5 72.36 74.10
70.15 113.11 129.5
99.5 84.71
81.5 113.66 93.27 74.5
113.08 82.5 115.96 Air Shaft 93.31 88.09 86.78
94.27 Limit83.5 of Face
88.09 84.70
70.5
115.5 71.5
Approximate 72.5 107.14 Tyres/ 73.5 84.78
75.5 113.53
76.5 Wood
77.5 77.50 84.46
101.5 78.5 79.5
109.5 86.93 80.5 83.79
84.5 84.72
114.5 85.5 84.65 94.94 86.5
95.28
94.63 87.81 111.5 95.21 87.5
T3 128.5 98.85 96.79 95.61 99.883 87.64 97.64 96.59 88.13 116.5 96.33 95.95 Drewton Tunnel 97.77 94.74 94.98 96.57 95.03 87.90 84.66
95.5 85.02
99.59 99.5 85.09 84.71
97.27 95.25 95.68 96.75 97.5 85.04 108.5 97.45 98.5 Vp
110.5 97.12 87.18 86.27 Air Shaft 99.13 99.44 96.5 94.96 107.5 97.75 93.95 91.38 89.10 84.80
101.67 92.84 127.5
97.28 100.29 99.10 95.27 91.42 Dismantled Railway
96.89 103.5
100.5 101.01 103.42 90.93 95.42 95.52 99.5 99.50
100.06 99.96 103.48 95.42 108.29
117.5 94.18 100.50 101.5 92.86 90.591.592.593.5 90.49
106.5 95.5 89.5 94.5 102.5 88.5
96.96 101.73 101.24 87.5 94.80 92.24 95.5 107.68 86.5
100.09 104.97 87.47 86.75 95.28
105.89 95.50 88.16 85.5 92.5
100.66 105.5 104.00 94.90 107.66 106.5 84.5 91.36 T4 105.21 108.60
107.95 92.53 92.30 93.42 100.13100.5 106.60 100.759 101.41 105.5 83.5 107.19 106.64 107.15 93.89 88.25
82.5 126.5 102.63 101.19 105.07 100.28 93.5 100.02 104.5 107.51 81.02 95.55 95.15 110.15 106.27 81.5 84.77 93.77 103.72 115.5 103.5 99.97 109.5 106.95 106.58 112.5 92.88 80.23 88.85 94.92 96.85 102.5 100.21 100.50 STONE 107.10 88.68 94.08 95.04 96.39 101.5 106.45 99.50 103.52 80.5 95.54 94.95 92.95 100.42 100.71 104.69 94.17 100.5 100.5 105.84 81.79 West Hill Plantation 104.5 T B 71.33 97.30 113.5 100.78 113.5 99.5 103.95 79.5 Def 105.88 103.99 92.92 101.67 105.28 97.85 102.53 98.5 99.57
93.67 88.43 78.76 125.5
100.42 TIPPINGS 82.46 108.21
102.93 107.5 92.42 99.5 101.51 97.5 100.08 103.58 99.86
98.5 101.79 92.74 98.42 99.72 100.55 104.44 104.22 102.17 105.54 105.39 99.21 111.5 95.74 101.57 101.84 88.42 100.31 91.94 100.07 103.20 101.83 105.39 80.47
97.5 102.09 105.52 81.29 96.5 105.5 88.03
97.69 100.86 104.39 106.08 104.81104.5 92.16
96.5 92.47 100.35 100.10 83.99 97.61 104.77 88.28 92.5 100.59 99.39 99.97
88.43 103.5 103.34 104.91 91.81
96.61 102.66 88.68 124.5
94.78 100.24 102.82 102.02
89.00 93.5
101.56 102.85 103.5 89.10 96.5 100.47 102.5 100.5 95.5
96.72 102.61 98.33 94.5 90.19 91.50 93.50 96.27 101.5 102.67 102.24 100.49 97.14 99.19 93.89 101.01 102.39 102.5 96.24 99.46 90.70 95.50 101.04 100.37 101.12 100.5 101.5 97.41 96.01 99.66
100.83 99.35 100.95 102.07
Def 98.82 100.62 94.99 95.41 95.94 105.5 107.5 106.5 92.21 97.42 99.36 98.64 108.5
88.77 TIPPINGS 89.26 95.00 123.5
98.5 98.57 99.88 99.50 96.22 1.22m FF 108.5 93.5 94.82 99.5 109.5 95.594.591.592.5 85.36 88.51 99.29 98.09 99.73 98.71 90.5 97.61 98.5 99.80 95.22 91.25 92.88 97.59 98.91 98.22 107.5 85.29 95.88 97.37 96.5 97.5 97.62 95.66 95.5 97.06 97.52 87.14 98.00 95.12 BH
93.16 96.55 97.90 97.24 94.5 97.07 97.84 110.5 93.5 97.62 83.21 88.23 96.10 97.26 80.98 82.64 96.79 92.5 93.66 95.43 93.71 97.65 84.10 95.5 92.52 79.89 77.45 89.63 93.5 93.45 91.5 96.16 94.5 96.34 95.55 97.51 88.589.5 91.5 93.91 87.1187.5 90.5 92.5 93.16 86.5 90.5 89.48 97.01
75.95 78.76 82.5 84.5 85.5 77.78 83.5 97.13 95.09 91.61 111.5 80.68 80.5 81.5 90.86 94.14 89.57 93.24 79.25 78.579.5 85 01 88.54 72.26 77.5 89.03 80.90 95.18 76.5 95.90 93.51 71.73 76.34 93.47
72.5 73.574.5 83.59
75.5 121.5 94.66 122.5 71.10 71.5 70.38 72.46
92.36
70.5 78.76 93.16 112.5 120.5
63.47
119.5 68.5 118.5
67.92 77.42 93.35 89.5 69.13 113.5
Weedley Tunnel 69.91 117.5 63.49
69.44 68.88
70.46 76.33 114.5
115.5
116.5
81.5
80.5
104.5
SM 115.5 72.5
116.5
105.5
103.5 106.5 110.5
111.5
117.5 112.5
109.5
107.5
102.5 113.5
79.5 114.5 78.5 73.5 118.5
77.5 74.5 101.5
76.5 75.5
108.5
119.5
79.5 80.5
82.5 84.5 83.5 85.5 86.5
81.5
89.5 88.5 90.5
78.5
87.5
91.5 75.5
77.5
74.5
76.5
FF 92.5 93.5
94.5 95.5
100.5 96.5
99.5 97.5
98.5
101.5
72.5 73.5
102.5 103.5
1.22m RH
KEY
OVERLAND FLOW ROUTE
SITE BOUNDARY
First Floor, South Wing, Equinox REV DATE BY DESCRIPTION CHK APD North Great Park Road, Almondsbury, Bristol , BS32 4QL
01454 625945 www.pegasusgroup.co.uk Planning | Design | Environment | Economics
CLIENT: SCALE @ A1: CHECKED: APPROVED: STONELEDGE PLANT AND TRANSPORT LTD 1:2000 LAJ NRF PROJECT: RIPLINGHAM QUARRY EXTENSION DATE: DESIGN-DRAWN: DRAWING-STATUS: WESTOBY ROAD, RIPLINGHAM 16/11/2020 LAJ PLANNING
PROJECT No: DRAWING No: REV: TITLE: EXAMPLES OF SWALE LAYOUTS TYPICAL EXAMPLE OF A QUARRY PROPOSED DRIANAGE OVERVIEW P17-1222 001 - SETTLING POND/BASIN Copyright Pegasus Planning Group Ltd. Crown copyright. All rights reserved. Ordnance Survey Copyright Licence number 100042093. Promap Licence number 100020449. Emapsite Licence number 0100031673 Standard OS licence rights conditions apply. Pegasus accepts no liability for any use of this document other than for its original purpose, or by the original client, or following Pegasus’ express agreement to such use. T 01285 641717 www.pegasuspg.co.uk \\10.6.1.1\DATA\PROJECTS\P17\P17-1222 STONELEDGE, RIPLINGHAM QUARRY\IN\04 DRAWINGS\03 SKETCHES\P17-1222-001 DRAINAGE STRATEGY.DWG pegasusgroup.co.uk
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