Flood Risk Assessment and Drainage Strategy
Thwaites Development Smith Road, Myerscough
Barnfield Construction
Project No: 16041
April 2016
Tel: (01423) 522293 [email protected] Windsor House, Cornwall Road Harrogate HG1 2PW www.topping-engineers.com
CONTENTS PAGE
CONTENTS PAGE 1 1.0 INTRODUCTION 2 Sources of Data 2 Existing Site 2 Proposed Development 3 Flood Risk Planning Policy 3 Other Relevant Policy and Guidance 5 2.0 POTENTIAL SOURCES OF FLOOD RISK 6 Fluvial Flood Risk 6 Groundwater Flood Risk 7 Flood Risk from Reservoirs & Large Waterbodies 7 Flood Risk from Sewers 8 Pluvial Flood Risk 8 Effect of Development on Wider Catchment 9 3.0 FLOOD RISK MITIGATION 10 Site Arrangements 10 Surface Water Drainage 10 Foul Water Drainage 11 4.0 CONCLUSIONS AND RECOMMENDATIONS 12
TABLES
Table 1.1 - Site Summary Table 2.1 - Pre-Mitigation Sources of Flood Risk Table 4.1 - Summary of Flood Risk Assessment
FIGURES
Figure 1.1 - Site Location Figure 1.2 - Environment Agency Flood Zone Mapping Figure 2.1 - Environment Agency Reservoir Failure Flood Risk Map Figure 0.2 - Risk of Flooding from Surface Water Mapping
APPENDICES
Appendix A – Existing Site Layout Appendix B - Development Proposals Appendix C – Drainage Strategy Appendix D – United Utilities Sewer Records
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1.0 INTRODUCTION
1.1 This Flood Risk Assessment (FRA) is compliant with the requirements set out in the National Planning Policy Framework (NPPF) and the associated Planning Practice Guidance. The FRA has been produced on behalf of Barnfield Construction in respect of a planning application for the proposed residential manufacturing/office development at Smithy Road, Myerscough
Table 1.1 - Site Summary Site Name Thwaites Development, Smithy Road, Myerscough
Location Smithy Road, Myerscough, BB2 7LB
NGR (approx.) 363729, 431462
Application Site Area (ha) 3ha
Development Type Mixed Use (manufacturing/office)
NPPF Vulnerability Low
EA Flood Zone Flood Zone 1
EA Office Lancashire
Local Planning Authority South Ribble Borough Council
Sources of Data
1.2 The report is based on the following information:
(i) Topographical Survey by TriCAD Solutions TRI-1660-01 to 06 (Appendix A) (ii) Site Layout Plan by Harrison & Johnson P3375/02 Rev C (Appendix B) (iii) Environment Agency information (iv) Central Lancashire Strategic Flood Risk Assessment
Existing Site
1.3 The site in question is located on land to the north of the village of Mellor Brook in Lancashire. Mellor Brook is located approximately half way between Preston and Blackburn. The land is bounded to the south by the A59. A site location plan is included as Figure 1.1 for reference.
1.4 A site topographical survey has been undertaken for the development site and is included in appendix A of this report. The high point of site is to the eastern boundary with adjacent the A59 roundabout at Mellor Brook village, where the site is approximately 90m AOD. The site then falls to the west, with the lowest development site level being circa 77.5m AOD in the NW corner. Outside of the development area the site has a reasonable level drop to the northern boundary as the site drops away to Mellor Brook which runs along the north of site in a depression at between 78m to 74m AOD east to west.
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1.5 The site is within the surface water catchment area of the River Ribble, 4km to the west. The closest watercourse to the application site, Mellor Beck, is directly to the northern boundary of the site and this watercourse runs to the west where it discharges to Wilcock Brook which then runs south west before joining the River Ribble.
Figure 1.1 - Site Location
Proposed Development
1.6 The proposed development comprises of construction of new brewery facility and office building along with associated access road and external parking area, the proposal will also retain the existing Stable building and hardstandings on site already (see Appendix B). Access to the proposed development will be taken from a new access road of A59 Mellor Brook roundabout which will be adopted with turning head up to private gate access to the main development.
Flood Risk Planning Policy
National Planning Policy Framework
1.7 The NPPF 1 sets out the Government’s national policies on di fferent aspects of land use planning in England in relation to flood risk. Planning Practice Guidance is also available online 2.
1.8 The Planning Practice Guidance sets out the vulnerability to flooding of different land uses. It encourages development to be located in areas of lower flood risk where possible, and
1 National Planning Policy Framework, CLG, March 2012 2 Planning Practice Guidance. http://planningguidance.planningportal.gov.uk/.
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stresses the importance of preventing increases in flood risk off site to the wider catchment area.
1.9 The Planning Practice Guidance also states that alternative sources of flooding, other than fluvial (river flooding), should also be considered when preparing a Flood Risk Assessment.
1.10 This Flood Risk Assessment is written in accordance with the NPPF and the Planning Practice Guidance.
Flood Zones
1.11 The Flood Zone Map for Planning has been prepared by the Environment Agency. This identifies areas potentially at risk of flooding from fluvial or tidal sources. An extract from the mapping is included as Figure 1.2 .
Figure 1.2 - Environment Agency Flood Zone Mapping
1.12 The site is shown to be located entirely within Flood Zone 1 (Low Probability) therefore the site is considered to be low risk of flooding. Flood Zone 1 is defined as land assessed as having less than a 0.1% annual probability of flooding from fluvial and tidal sources.
1.13 Table 2 of the Planning Practice Guidance classifies land use. Under these classifications the proposed distribution centre is considered to be ‘ Less Vulnerable’ to the potential impacts of flooding.
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1.14 Table 3 of the Planning Practice Guidance identifies that any development is considered appropriate within Flood Zone 1.
Flood Risk Essential Water Highly More Less Vulnerability Infrastructure Compatible Vulnerable Vulnerable Vulnerable Classification
Flood Zone 1 ü ü ü ü ü Exception test Flood Zone 2 ü ü ü ü required Exception test Exception test Flood Zone 3a ü x ü required required Exception test Flood Zone 3b ü x x x required
Other Relevant Policy and Guidance
Strategic Flood Risk Assessment
1.15 The Central Lancashire Strategic Flood Risk Assessment 3 (SFRA) was prepared to review flood risks on a much wider scale to assess the potential for new development within the study area. The SFRA was used as an evidence base for Local Development Frameworks for each Local Planning Authority.
1.16 The SFRA therefore aims to bring together all available flood risk information for a variety of sources to provide a robust assessment. The SFRA therefore is useful for this site-specific FRA by highlighting available data and instances of known flooding in the area. Although written under the guidance of Planning Policy Statement 25, the SFRA is still considered to include relevant information.
3 Scott Wilson (2007): Central Lancashire Strategic Flood Risk Assessment; produced on behalf of Harrogate Preston City Council, South Ribble Borough Council and Chorley Council
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2.0 POTENTIAL SOURCES OF FLOOD RISK
2.1 The table below identifies the potential sources of flood risk to the site, and the impacts which the development could have in the wider catchment prior to mitigation. These are discussed in greater detail in the forthcoming section. The mitigation measures proposed to address flood risk issues and ensure the development is appropriate for its location are discussed within Section 3.0 .
Table 2.1 - Pre-Mitigation Sources of Flood Risk Potential Risk Flood Source Description High Medium Low None Fluvial x The site is located in Flood Zone 1 The site is far removed from any tidal Tidal X influence.
Canals X None present.
Ground conditions are not conducive Groundwater X to fluctuating groundwater levels.
Reservoirs and The site is shown to fall outside of the X waterbodies area at risk of reservoir failure.
The site within a largely undeveloped Sewers X area. Any sewers present will provide minimal risk. Areas of site shown to be within low Pluvial runoff X Risk area of surface water flooding. Effect of The development will increase the Development X area of impermeable surfaces leading on Wider to a potential increase in runoff. Catchment
Fluvial Flood Risk
2.2 As previously mentioned, the site is shown to be within Flood Zone 1 (Low Probability) at low risk of flooding from fluvial and tidal sources.
2.3 The risk of flooding posed to the proposed development is low. The topographical survey indicates that the watercourse sits at a level approximately 4m beneath the development area due to the banking to the north of site.
2.4 Mitigation measures to address the residual risk posed by the watercourse along the northern boundary are discussed within Section 3.0 of this report.
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Groundwater Flood Risk
2.5 Subject to completion of site investigation to confirm we would assume that natural ground water level is located well below the site surface and the nature of the strata means it unlikely that there will be perched water above this level.
2.6 We therefore do not consider there is a risk of groundwater flooding affecting the development subject to final confirmation upon completion of suitable site investigation.
Flood Risk from Reservoirs & Large Waterbodies
2.7 Reservoir failure flood risk mapping has been prepared by the Environment Agency, this shows the largest area that might be flooded if a reservoir were to fail and release the water it holds. The map displays a worst case scenario and is only intended as a guide. An extract from the mapping is included as Figure 2.1.
Figure 2.1 - Environment Agency Reservoir Failure Flood Risk Map
2.8 Mapping demonstrates the site and possible access routes are far removed from the flood extent associated with flooding from large reservoirs. A review of Ordnance Survey mapping shows no other substantial lakes or waterbodies in the vicinity of the site.
2.9 As such, the risk posed from this source is considered negligible.
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Flood Risk from Sewers
2.10 The site is located in a largely village setting surrounded by residential properties. The closest sewers to site are located several hundred metres away and flow away from site. Sewer records are contained in Appendix D of the report,
2.11 The highest point of site to the east is set at a higher level topographically from the surrounding highway infrastructure where sewers are shown to be located and as such, flooding from sewers is considered to pose a minimal risk to the proposed development.
Pluvial Flood Risk
2.12 Risk of flooding from surface water mapping has been prepared by the Environment Agency, this shows the potential flooding which could occur when rainwater does not drain away through the normal drainage systems or soak into the ground, but lies on or flows over the ground instead. An extract from the mapping is included as Figure 2..
Figure 2.2 - Risk of Flooding from Surface Water Mapping
2.13 The mapping produced by the Environment Agency shows a well-defined flow path to the north of the site correlating with Mellor Brook shown to flow from east to west and does not encroach on to site.
2.14 As such, the actual risk posed by surface water flooding is minimal with any flow currently falling towards the watercourse and away from the site. The proposed development will
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adequately address surface water runoff from the proposed development, as discussed in Section 3.0 .
Effect of Development on Wider Catchment
Development Drainage
2.15 The current site is considered to be a mixture of existing buildings to be retained and rebuilt and other areas of buildings and hardstandings to be demolished and a drainage survey will be required to confirm the existing on site drainage system.
2.16 However based on the lack of adoptable sewers in the area of site for surface water and the proximity to Mellor Brook it is assumed the site discharges to the watercourse although no evidence is currently available that an existing outfall exists and this would need to be confirmed. Foul water is assumed to be via septic tank or similar currently however the new development will need a connection to public foul sewer network.
2.17 The proposed development will add an impermeable footprint to this site, altering the surface water runoff regime. Due to the lack of information on the existing drainage arrangements for the site it is therefore assumed the site will discharge surface water a Greenfield run off rate into the watercourse to the north.
2.18 An appropriate surface water drainage strategy will be required to ensure the proposed development does not adversely affect flood risk elsewhere as a result of changing patterns of surface water runoff/development drainage.
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3.0 FLOOD RISK MITIGATION
3.1 Section 2.0 has identified the sources of flooding which could potentially pose a risk to the site and the proposed development. This section of the FRA sets out the mitigation measures which are to be considered within the proposed development detail design to address and reduce the risk of flooding to within acceptable levels.
Site Arrangements
Sequential Arrangement
3.2 The Flood Zone mapping shows the site to be located within Flood Zone 1..
Finished Levels
3.3 Given the site’s location within Flood Zone 1, there are no specific requirements for finished floor levels with regard to flood risk. These levels may be set in accordance with wider design requirements.
3.4 Nevertheless, it is recommended that a nominal elevation above immediately surrounding ground levels should be provided to deter any potential overland flows from entering the proposed buildings.
Surface Water Drainage
3.5 The surface water drainage strategy is contained within Appendix C as per Topping Engineers drawing 16041-C-50. However can be summarised as follows:
Existing survey doesn’t show any sign of a positive drainage connection from the current site. Due to a lack of information it is therefore assumed the site will be subject to a Greenfield run-off flow restriction. Greenfield run-off has been calculated using the IH124 method for the site at 28l/s. Usual drainage hierarchy applies, it is assumed due to lack of site investigation that soakaways will not be viable (subject to undertaking percolation tests). As the site is next to a watercourse it is assumed surface water will discharge to Mellor Brook. The run-off has been split into two to suit the two development areas, the main development @ 23l/s and the adoptable highways at 5l/s. Each system/area is attenuated and has flow control manhole. 2 no. new discharge points into Mellor Brook are required and are subject to agreement with drainage authority. The development system is proposed to be a private maintained system, the highway system will be adopted by Lancashire County Council under S38 agreement.
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Foul Water Drainage
3.6 The foul water drainage strategy is contained within Appendix C as per Topping Engineers drawing 16041-C-50. However can be summarised as follows:
No foul sewers are located in the immediate site vicinity. Discharge to Mellor Brook for foul is not viable due to the nature of the development and trade effluent flows. Closest UU foul sewer is in Myerscough Smithy Road which is several hundred metres away from site to the south east. The site topography falls east to west and therefore any foul flows will need to be pumped to allow discharge to adopted sewer network. Adopted foul pumping station is proposed to the west of the site with rising main laid in landscaped areas where possible to the above foul sewer. The rising main will need to cross both the A631 and Myerscough Smith Road in order to reach UU manhole. Proposed foul strategy is subject to further discussion with United Utilities.
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4.0 CONCLUSIONS AND RECOMMENDATIONS
4.1 This Flood Risk Assessment (FRA) is compliant with the requirements set out in the National Planning Policy Framework (NPPF) and the associated Planning Practice Guidance. The FRA has been produced on behalf of Barnfield Construction in relation to the proposed development at Mellor Brook, Lancashire.
4.2 This report demonstrates that the proposed development is not at significant flood risk, and simple mitigation measures have been recommended to address any residual risks that may remain. The identified risks and mitigation measures are summarised within Table 4.1 .
Table 4.1 - Summary of Flood Risk Assessment Flood Source Proposed Mitigation Measure
Fluvial Site is shown to be in Flood Zone 1.
Strategic surface water drainage strategy prepared for wider Impact of the development will ensure a sustainable approach to surface water Development management.
4.3 In compliance with the requirements of National Planning Policy Framework, and subject to the mitigation measures proposed, the development could proceed without being subject to significant flood risk. Moreover, the development will not increase flood risk to the wider catchment area as a result of suitable management of surface water runoff discharging from the site.
PREPARED BY
Andy Dyson
On Behalf of Topping Engineers
16041 – Thwaites Development, Smithy Road, Myerscough
Appendix A
Existing Site Plan
Tel: (01423) 522293 [email protected] Windsor House, Cornwall Road Harrogate HG1 2PW www.topping-engineers.com 79.00
SOIL MH 78.57 IL77.91 78.81 79.18Notes 78.66 78.32 79.97 79.19 79.57 79.17 All Dimensions to be checked on site. Walls shown on 78.72 79.28 79.59 79.24
79.77 79.21 plans are not to be assumed to be solid & should be 79.44 79.23 79.25 79.35 79.30 checked for thickness, construction, load bearing capacity 78.98 79.37 78.96 CONCRETE 79.34 79.28 79.25 79.36 & stability. 79.00m 79.26 79.26 79.24 79.34
79.12
79.23 79.23 79.37
79.28 TARMAC 79.20 79.38 RWP 79.42 79.36 79.33 79.43 EH82.76 79.18 79.37
79.11 79.42 79.00m 8 79.24 78.96 7 79.36
79.07 79.55 79.00 1 6
79.97 RH84.61 79.34 2
80.01 78.93 BOL 82.14 DENSE VEGETATION - NO ACCESS 82.10 81.93 3
BOL 5 78.89 82.24 79.95 4 79.08 79.85 81.87 81.99 North
TW84.78 SOIL 82.09 80.16 82.26
79.99 78.89
82.09 82.22 80.06 79.68 82.28
80.24
79.00 79.97
78.00m 77.70 80.26 80.10 81.95 79.02
77.79
78.00m 80.54 81.27 80.35
79.33 78.80 78.00 82.30
81.52
82.23 82.15
80.44 81.96 82.30 82.10 81.37
77.88 78.28 79.27 78.54 80.48 78.24 81.04 82.64 78.68 80.63 81.31 81.54 82.26
79.03
80.70 82.05 79.44 78.94 80.75
78.82 SOIL
79.09 82.05 LP 80.88 81.94 78.43 78.54 78.86 80.99 81.34 82.41 SOIL 81.14 78.71 82.46
79.25
79.19
82.16 82.37 79.55 81.31 82.54
79.20 82.36 79.58 79.69 79.01 79.46 80.93 GU 79.79 79.00m 79.41 MH 81.88 82.08 CL79.67 LC 79.99 79.71 80.00m 82.49 79.83 81.31 79.35 ABBREVIATIONS 79.80 81.43 82.51 79.99 80.16 81.49 TW83.95 82.15
81.38 79.45 GRASS 81.00m 79.79 81.66 79.55 81.12 81.93 79.86 82.36 82.69 81.70 79.98 BT BT BT Cover 79.67 81.39 80.39 82.96 81.07 81.75 80.76 GU 80.52 81.81 CL Cover Level 81.78 80.13 81.93 79.54 80.00m 82.41 82.60 80.08 LP 82.21 80.58 81.94 79.88 80.41 DK Drop Kerb 79.81 80.01 81.72 LC GRASS Post & Rail Fence 81.18 82.69 CB 82.76 GU Gully
81.93 82.12 82.31
80.37 79.90 82.37 80.23 80.43 80.35 LC Lighting Cover MH 80.29 81.90 79.98 80.19 CL80.42 80.46 LP Lamp Post 80.33 81.98 82.17 82.86 TARMAC 82.95 81.87 82.44 MH Man Hole 80.42 82.04 81.00m 80.12 82.24 80.64 80.88 82.54 GU 81.04 SP Sign Post 79.71 80.33 TF83.06 80.57
79.88 80.14 END 80.39 SP 81.16 81.05 TS 81.60 81.55 TF Top of Fence DK 81.68 80.71 80.34 BOL 80.43 80.83 SP 81.82 80.32 80.87 80.57 81.92 TS Traffic Signal 81.85 80.42 MH 81.91 82.31 82.36 82.53 CL81.01 82.43 80.38 80.95 GU 82.33 82.72 81.29 80.51 80.58 TF82.33 81.66 82.80 80.72 GRASS 80.77 82.77 79.47 80.82 GRASS NOTE 80.11 MH 80.68 All levels and coordinates relate to OSGB36 using GNSS data. CL80.92 81.10 80.62 83.36 GU LP TF81.87 80.73 80.96 81.65 83.89 80.84 83.06 Levels defining edge of carriageway are observed at channel (bottom 79.21 80.88 83.33 79.30 80.48 80.62 80.59 TS 80.96 80.74 80.77 of kerb). SP 80.57 81.02 81.24 80.81 83.86 80.30 79.63 TARMAC 80.86 LC 80.90 LC 80.89 80.89 82.80 83.49 84.05 80.55 TS LOOK RIGHT Post 82.44 79.38 82.18 82.66 DK 81.06 GU 80.70 80.94 84.13 81.16 TF84.41 79.45 GU 81.24 79.43 82.18 83.20 80.62 82.50 83.67 79.52 80.46 81.09 81.19 81.04 83.21 SP 79.54 81.10 82.22 83.12 83.99 79.63 81.27 83.38 81.09 81.29 CHIPPINGS 79.73 79.69 80.58 81.14 LC 82.81 83.45 83.60 79.66 GRASS GRASS 83.47 SP 80.71 82.44 TF85.24 79.88 80.67 81.17 81.14 LC 79.54 80.63 TARMAC 81.58 79.75 79.88 79.97 GU LC 79.70 79.70 83.03 TS 80.76 81.55 83.64 80.49 81.37 TARMAC 80.68 81.27 SP 82.65 GRASS 79.80 79.97 80.61 GU 81.34 81.73 TARMAC 80.00 80.00m 80.07 80.84 81.03 LP 81.14 LOOK LEFT 79.86 GU 79.60 79.77 81.10 81.53 TACTILE Post 81.20 82.85 81.04 MH 81.12 CL81.74 80.08 SP 81.90 GRASS 80.10 GU 81.11 81.50 Post 80.20 80.58 TARMAC 80.04 TARMAC TARMAC 81.28 TC 01 81.05 81.72 79.82 81.27 E 363583.085 TS N 431445.306 81.12 81.65 79.98 SP Ht 81.856 MH 81.02 TACTILE
GRASS CL80.21 80.17 TS GU LOOK LEFT LOOK 81.30 81.21 80.19 81.19 81.09 81.44 81.00m 80.28 GU 81.31 80.49 79.94 SP 80.58 80.55 80.19 80.30 CB CB 81.30 CB SP 81.53 TS LC TS GU 81.61 LC 80.63 80.60 81.34 80.65
80.49 80.56 80.24 80.55RIGHT LOOK TARMAC 80.63 81.39 80.34 80.39 GU LC 80.72 TACTILE 81.61 TS Post 80.31 SP 81.80 TC 03 80.73 TS 81.52 80.44 80.40 80.44 80.64 80.77 E 363500.067 LC 80.58 TACTILE
80.68 GU 81.65 LEFT LOOK GRASS N 431436.820 LOOK RIGHT
81.83 Ht 80.419 LC LEFT LOOK 80.53 LP DK 80.5680.65 80.90 TS 80.90 80.83 TACTILE 80.52 81.69 Post 80.79 TS 81.98 TACTILE 81.02 82.00m 80.58 LC 82.00 80.47 80.43 80.68 LOOK LEFT 80.92 81.12 TACTILE 81.95 81.01 TS TACTILE 80.74 SP 80.60 SP TARMAC TS 80.82 TARMAC TS 80.64 81.11 80.60 80.88 Post 81.01 82.26 LC 81.87 GU 80.71 TS 81.04 80.85 TS TACTILE 80.93
80.77 80.93 80.78 LEFT LOOK 82.30 80.91 LOOK RIGHT 80.85 80.67 TACTILE
TS 82.45 80.85 80.83 80.84
TARMAC 80.93 80.82 82.53
80.90 LC 80.70 81.03 GU
80.93 80.64 81.06 80.80 SP GU 81.14
82.68 81.01 81.00 Rev. Description. 80.82 81.23 0 Issued 80.83 81.32 80.96 TS TARMAC 80.85 80.78
LOOK TACTILERIGHT80.86
81.00 80.7580.76 81.48 82.53 81.07 GU 81.23 81.58 80.84 81.03 SIGN 81.24 81.37 82.69 80.78 80.87 LP 81.42 GU MH 80.97 CL80.97 81.01 GU 81.04 LC 81.72 GRASS LC 81.60 81.64 81.82 81.07 TC 04 E 363559.789 LC 80.9181.00 TARMAC 81.01 N 431423.194
81.22 Ht 81.519 81.06 81.87 81.10 82.85 81.00 81.88 82.82 SP 82.17 81.94 81.96 GRASS 82.05 LP 81.24 81.08 82.98 81.17 81.13 83.45
82.76 SP 83.55 83.02
83.34 83.71 83.15 Site Address 81.27 Post & Rail Fence 81.34 MH 83.59 83.52 CL81.27 LP 81.34 MH 83.41 83.92 81.39 CL83.36 83.68 Site off A59 81.32
81.43 82.92
81.52 83.41 TF85.25 82.73 Post & Rail Fence LP 83.98 Samlesbury GU 83.49 SP
81.66 Post & Rail Fence Blackburn
GU 81.63 83.55 83.57
81.70 82.89 81.74 Project Description
81.75
GRASS
83.59 81.83 81.77 81.72 Site Survey 83.64
81.95
81.87
82.00 82.66
81.98
82.03 81.94
83.63
82.23 Drawing Title
82.21
83.69 Existing Site Layout
82.39 82.29
83.80
82.54
83.00m Scale Date Drawn By Post & Rail Fence
83.81
83.73 1:200@A1 10/03/2016 AD/SN/MW Drawing Number TRI-1660-01 The contents of this drawing and entities used are copyright TriCAD Solutions Ltd 2010 © 79.07 79.27 79.90 79.23 79.33 79.65 79.57 EH82.65 80.00 79.37 79.43 79.43 GU 79.35 79.63 79.65 79.44 79.10 79.42 79.55 Retaining Wall 80.14 80.66 CONCRETE 79.47 79.45 79.36 79.85 EH82.60 79.73 79.80 79.38 79.48 79.89 79.77 RWP 79.95 79.59 80.02 Notes 79.39 79.72 79.96
79.42 79.84 80.15 80.02 EH82.77 80.21 80.05 79.88 80.14 79.36 Retaining Wall 79.85
79.94 79.93 80.09
EH82.76 80.20 80.03 80.76 80.87 80.07 80.40 80.18 79.90 79.72 80.24 All Dimensions to be checked on site. Walls shown on 80.29 80.83 80.15 80.25 80.50 80.14 80.26 RH83.49 80.33 80.23 plans are not to be assumed to be solid & should be 80.07 80.23 80.35 83.30 80.90 80.97 81.17 83.19 80.32 checked for thickness, construction, load bearing capacity Dense Vegetation 81.53 80.27 80.43 80.36 GRASS TW85.20 80.35 82.26 81.30 80.56 81.27 82.98 80.40 & stability. 82.66 80.55 81.82 82.04 82.91 80.48 82.54 82.22 81.07 80.44 82.32 82.95 80.55 80.54 81.60 Retaining Wall 80.58 80.71 82.27 81.66 80.42 82.76 80.59 RH84.61 RH83.96
82.50 80.90 82.46 82.37 82.97 80.60 80.62 80.54 80.77 80.62 80.68 80.78 82.14 EH84.60 DENSE VEGETATION - NO ACCESS 82.55 EH82.44 82.10 82.80 80.65 80.63 81.93 82.51 82.60 80.67 80.66 80.80
82.53 81.53 80.66 80.61 TW83.44 80.67 83.00 82.24 82.55 82.64 Dense Vegetation - No Access 80.87 CONCRETE 82.28 82.67 82.69 80.74 RH85.99 FFL80.85 80.60 81.87 81.99 82.29 82.79 80.77 82.38 82.01 80.67 80.88 TW84.78 82.44 82.09 82.54 80.87 80.86 82.80 80.83 80.83 80.83 80.91 80.16 82.26 83.13 82.28 80.96 80.85 80.74 81.13 80.88 80.80
83.05 82.66 81.01 82.22 80.89 80.87
82.09 81.94 80.86 80.93 83.52 82.28 82.69 TW85.32 82.27 81.91
82.95 81.02 80.26 No Access 82.09 81.77 80.89 82.58 82.66 82.58 80.96 81.09
81.95 TW83.25 81.04 83.19 82.77 80.92 82.50 82.31 82.72 82.20 81.78 RH83.93 82.29 82.78 81.90 80.97 81.27 83.18 81.05 82.92 83.09 81.60 81.08 81.50 83.79 FALLEN TREE 8 82.86 81.12 81.01 TW84.60 82.70 81.27 82.30
81.52 82.23
82.15 82.30 SOIL/RUBBISH 7 81.96 82.36 82.37 82.88 83.24 81.40 81.52 81.56 82.10 81.37 82.80 1 TW84.56 6 FFL81.11 81.37 81.69 83.26 TW84.65 81.12 81.35 81.04 83.39 83.02 82.85 81.45 82.64 82.73 82.93 83.30 81.31 82.82 EH83.41 81.72 81.54 82.26 2 81.64 83.24 83.36 83.26 81.63 83.18 MH 82.05 83.08 TW84.70 81.38 3 No Access CL83.26 81.45 82.54 83.79 5 83.52 83.37 IL82.02 82.99 81.73 81.60 4 82.91 81.86 82.06 SOIL 81.56 North
82.97 83.4883.65 83.41 83.24 81.65 81.95 82.59 83.73 82.05 83.04 81.94 83.26 84.28 82.24 83.32 84.17 81.82 81.34 82.41 83.24 82.35 83.67 Dense Trees/Vegetation - No Access 82.84 83.22 82.27 82.46 82.64 83.21 82.16 82.64 TF85.06 82.02 83.32 84.59 83.19 83.40 85.34 82.19 83.33 82.22 82.16 82.37 83.08 82.54
82.54 83.32 83.28 83.27 83.26 82.34 82.36 TW83.96 82.55 83.32 83.32 83.30 85.12 82.50 84.49 82.37 85.50 85.02 83.25 83.95 83.89 82.72 82.74 82.08 85.08 82.33 83.35 83.43 82.58 82.90 84.97 85.16 82.54 82.62 83.30 82.49 85.24 83.35 TF84.99 83.57 83.53 82.51 83.92 85.02 85.09 82.61
TW83.95 82.15 85.07 83.35 83.30 84.42 82.76 82.92 83.57 83.35 83.10
83.34 85.07 82.76 82.95 81.93 84.86 82.36 82.74 82.69 85.31 85.04 82.81 85.14 GRASS 82.44 82.96 84.88 83.47 83.30 83.20
85.01 83.41 84.34 85.20
83.55 83.47 83.44 85.06 83.00 83.30 85.39 82.95 81.93 82.41 82.21 82.60 82.87 84.28 84.78 85.12 82.86 83.09 83.31 SOIL RUBBLE 82.82 83.28 83.42 85.19 83.48 83.92 83.41 83.40 82.69 81.18 85.61 84.93
82.76 84.85 84.04 85.31 85.24 82.88 85.29 85.23 83.20 82.12 82.31 83.19
83.53 83.41 85.49 FFL82.50 83.10 82.37 85.30 85.10 83.19 85.17 84.79 81.90 83.99 85.60 85.04 83.12 85.19 85.22 85.05 85.25 83.22 85.26 83.57 85.28 81.98 82.17 82.86 83.46 84.56 85.15 82.96 82.95 85.06 85.20 83.23 84.15 83.45 83.47 83.41 82.44 85.04 84.97 82.24 85.18 84.74 85.20 83.48 82.81 85.10 83.47 83.36 82.54 83.50 EH87.75 84.40 85.08 85.15 85.00
84.61 83.59 83.50 84.79 85.00m 85.39 83.22 84.27 83.51 83.91 85.19 81.60 81.55 83.09 84.25 84.17 BOL 83.39 84.52 84.73 83.25 84.16 84.09 83.58 RUBBLE 84.78 ABBREVIATIONS 83.87 85.18 83.71 82.31 83.35 83.86 84.57 FFL85.21 84.96 81.91 82.36 82.53 83.51 85.11 84.00 83.50 82.43 85.14 84.98 83.80 82.33 82.72 84.69 84.29 84.21 83.86 82.80 85.00m 83.10 83.11 RUBBLE 85.01 82.77 83.61 83.64 84.23 83.55 GRASS 83.44 83.92 83.92 84.53 BT BT Cover 83.37 83.37 83.62 85.31 85.13 84.16 84.18 83.36 83.46 85.18 84.33 83.54 83.49 85.06 CL Cover Level 83.72 85.24 83.98 83.74 83.89 84.93 84.82 84.22 83.06 83.76 83.63 83.90 84.37 RUBBLE 84.32 84.70 83.33 83.99 DK Drop Kerb 83.78 84.69 83.88 85.31 84.05 83.86 84.14 84.22 GU Gully 83.84 84.11 84.93 84.27 83.49 83.86 84.09 85.18 84.18 84.81 84.05 GRASS 84.18 85.09 84.18 83.96 84.52 84.98 84.20 84.40 LC Lighting Cover 84.96 84.59 84.10 84.97 Multi Stem 84.55 84.13 84.92 LP Lamp Post TF84.41 84.63 84.83 84.21 84.98 83.20 FFL85.21
83.92 84.07 84.06 85.15 83.67 84.22 MH Man Hole 83.21 RH89.37 SP 84.55 85.19 84.07 84.88 84.33 85.08 TF85.26
83.12 83.99 83.95 84.46 84.32 84.99 84.84 84.82 83.38 84.79 84.52 84.13 SP Sign Post 84.44 84.26 85.18 84.95 84.47 84.34 84.81 84.70 84.79 84.67 84.44 TF Top of Fence 82.81 83.45 83.60 85.16 85.13 84.71 84.90 85.00 84.83 84.52 84.32 84.53 TS Traffic Signal 83.47 84.50 85.17 82.44 TF85.24 84.92 84.84 SOIL 84.91 85.06 84.89 83.81 85.18 81.58 85.14 84.98 83.72 Post & Rail Fence 84.11 83.03 84.36 84.57 83.64 81.55 85.14
84.55 83.99 85.12 84.97 84.37 84.50 85.06 84.90 82.65 85.07 85.07 84.59 85.05 NOTE GRASS 83.93
84.95 All levels and coordinates relate to OSGB36 using GNSS data. 84.15 84.68 81.73 84.04 84.65 84.94 85.20 Dense Vegetation SOIL 84.99 84.90 84.19 85.06 83.08 83.98 Levels defining edge of carriageway are observed at channel (bottom GU 84.11 85.06 SOIL/RUBBISH 85.00 of kerb). 81.53 84.19 85.05
82.85 84.39 84.94 MH 84.76 84.57 84.61 GRASS 85.07 85.16 CL81.74 81.90 84.16 85.08 81.50 83.19 84.58 85.20 84.96 84.81 85.28 TC 01 85.05 84.98 85.10 81.72 84.37 85.23 E 363583.085 82.97 82.57 85.56 81.96 84.15 84.44 84.12 84.34 84.32 N 431445.306 84.80 85.10
81.65 83.03 84.99 84.96 Ht 81.856 84.68 85.32 85.09 82.08 84.29 85.09 GU LP 84.26 82.11 Possible drain 84.36 84.70 85.04 84.84 85.11 84.99 84.94
82.12 82.15 GRASS 84.93 81.89 85.21 85.06 85.38 81.80 84.90 85.00 85.09 85.01
85.00 85.33 85.36 84.96 85.06 85.02 85.14 84.58 82.31 Post & Rail Fence GRASS 85.09 85.10 85.15 85.09 COMPACTED CHIPPINGS 85.18 82.32 85.19 81.94 85.14 85.20 85.34 85.39 85.17 85.03 85.10 85.16 85.41 85.43 85.28 85.11 85.21 85.37 85.43 85.30 85.42 82.06 82.16 SP 85.18 85.18 85.54 85.51 85.16 85.28 81.80 82.45 82.48 83.66 84.97 85.07 85.19 85.39 85.20 85.47 85.14 85.28 85.50 GU 85.10 85.35 85.37 85.38 85.49 82.41 85.58 82.28 85.14 85.68 85.45 BLOCK PAVING 85.30 82.20 81.69 85.21 81.98 82.60 85.15 85.26 85.60 SOIL/RUBBISH 82.60 85.48 85.18 82.39 85.45 82.30 85.23 85.42 SOIL/RUBBISH 82.71 82.77 81.87 84.89 TP SP 85.37 82.14 Dense Vegetation
82.53 85.52 85.83 82.44 GRASS 85.89 82.05 82.94 85.91 GU Post & Rail Fence 85.07 82.32 82.94 85.95 86.00 85.63 82.60 85.75 LP 82.21 82.78 85.70 85.65 86.06
86.18 82.50 83.22 85.98 TC 02 E 363639.437 82.94 82.39 N 431427.407 83.20 85.91 82.85 Ht 83.036 83.34 86.32
82.67 GU 86.05 86.22 82.55 86.22 GU 86.21 86.02 82.99 83.09 83.37 81.72 81.82 MH LC 82.86 CL83.31
82.73 83.50 TF87.47 81.87 85.97 86.25 81.88 82.85 83.17 83.28 82.82 SP 82.17 81.94 81.96 82.05 83.00 82.98 82.91 86.36 83.29 83.02 83.69 GU 83.45 Rev.0 Description. Issued 82.14 86.15 82.13 83.15 GU Post & Rail Fence 83.14 82.22 83.18 83.08 LP TC 05 E 363597.619 SP 83.13 N 431416.324 83.31 Ht 82.277 83.52 83.63 83.84 82.32 82.57 83.27 84.62 82.65 TF84.65
LC
83.54 83.43 82.48 83.42 83.84 84.03 82.79 GU 84.68 GU 83.75 MH 82.87 83.56 CL82.86 83.57 LP LC 82.95 82.64 83.05 84.18 83.63 TC 07 84.02 84.01 83.91 E 363694.760 84.00m 82.79 83.16 N 431410.681 83.97 83.07 83.25 83.73 Ht 84.130 84.29 83.82 GU 83.15 Site Address 83.93 83.35 82.93 83.43 84.90 83.91 85.11 83.28 TF86.54 LP 85.00m 83.25 83.88 Site off A59 TC 06 83.55 84.23 Post & Rail Fence E 363654.117 83.46 83.64 N 431406.008 83.65 84.17 85.04 83.28 Ht 83.330 MH 83.65 Samlesbury 84.93 CL83.66 83.61 83.74 83.49 84.05 85.21 85.11 Blackburn 85.04 83.81 LP 83.88 83.58 84.21 85.13 Project Description 83.68 85.20 83.76 83.75 Site Survey
85.23 84.38 85.14 83.89 83.86 83.98
GU 85.37 85.24 SP
GRASS Drawing Title 84.12 Post & Rail Fence 84.20 84.26 Existing Site Layout TF86.8885.51
85.33 84.30
85.47 Scale Date Drawn By 86.16 86.00m 1:200@A1 10/03/2016 AD/SN/MW 85.59 86.47 Drawing Number
Post & Rail Fence 86.55 86.51 TRI-1660-02 The contents of this drawing and entities used are copyright TriCAD Solutions Ltd 2010 © 5 6 4 7 3 m TriCAD Solutions Ltd 2010 © Ltd 2010 Solutions TriCAD 8 2 1 Date By Drawn BT Cover Level Cover Gully Cover Lighting Post Lamp Hole Man Post Sign Top of Fence Traffic Signal Drop Kerb Drop North All levels and coordinates relate to GNSS data. OSGB36 relate using coordinates and All levels BT CL GU LC LP MH SP TF TS NOTE DK ABBREVIATIONS of kerb). Levels defining edge of carriageway are observed at channel (botto at channel observed are of carriageway edge defining Levels 0 Issued Notes be & should to solid be to not assumed be are plans capacity bearing load for construction, thickness, checked & stability. Rev. Description. Address Site A59 Site off Samlesbury Blackburn Description Project Site Survey Title Drawing Site Layout Existing Scale 1:200@A1 Number Drawing 10/03/2016 AD/SN/MW TRI-1660-03 All Dimensions to be checked on site. Walls shown on shown site. Walls on to checked be All Dimensions
87.77
88.55 86.34 86.93
86.62
87.65 86.37
86.71
86.22 87.67 86.47 LP 87.38
86.54 copyright are used entities and of The contents drawing this 87.67 86.61 86.50
86.46 87.77 86.51 86.23 87.54
87.58 GRASS 86.81 86.32 SP
86.14 86.33 86.45
87.47
86.38 86.83 87.38 87.13
87.39 86.17 88.39 86.15
TF88.68
86.19
86.14 86.23 87.50 87.30 86.58
86.31
86.06 87.44
87.60
Palisade Fence 86.12 85.98
87.44 86.19
86.96
85.70 86.10
85.98 85.90
87.45
GU 85.84
86.57 85.97 85.90
87.11 85.71 86.28
87.29 88.33 85.04
85.80
86.04
85.87 85.72 85.97 Post & Rail Fence 86.64
GRASS 87.34 87.37 85.80 85.88 83.71 83.62 83.74
86.94 86.66
87.51
85.06
85.79
83.69 85.62 82.74 82.83
86.29 83.62
81.97 87.09 81.91 85.67
84.87 LP
87.25 87.27
85.76 85.61 81.32 85.70 80.72
83.65 85.75
80.09 88.18 83.71 79.71 87.19
85.18 83.35
85.62 86.31 87.29
85.40 Vegetation 82.37 81.46
85.48
81.09 86.48
85.28 86.11
Multi Stem Multi
86.78 TF88.62
86.65
85.81 86.96
85.07 86.56 85.50
86.47 87.27 86.23 85.64 87.01 85.59
84.76 87.21
Post & Wire Fence Wire & Post
86.84 86.55
84.35 86.11
84.18 86.22 87.08
85.91 84.03 87.05 83.44 85.46 85.39 85.48
85.79 85.96 88.03 87.27
84.78
85.53
86.23
85.81
87.12 84.96
85.60 85.88 84.49
84.43 Chainlink Fence Chainlink 87.24
86.31
87.32
85.90 86.98
86.29
87.10
86.24 84.51 85.89 85.33 85.41 85.82
85.15 85.80
85.92 84.58 87.09
86.22 85.97
86.05
85.00m 85.19 85.93 87.27
85.24 87.20 84.77 Dissused Swimming Pool Swimming Dissused LP 86.42 85.85 86.83
84.64 88.18 85.14 85.25
85.89 84.02
86.24
85.85 85.38
86.16 SP
85.17
85.24
85.00m Post & Rail Fence 86.21
85.41 84.85
86.91
85.85 86.99 85.85
84.82
85.86 86.47 85.87 85.00 88.17
85.83 85.88 85.87 SP
86.79
86.99 GU 86.05
86.30 86.19 87.04
85.73 Palisade Fence
84.93 86.43 86.41
85.05 86.63 84.10
Chainlink Fence 85.93 08 85.217 363743.562 431381.388 GU
87.34 TC E N Ht 85.83
84.97
85.06
85.65
85.49 86.51 85.98
86.66 86.02 84.90 84.96 85.17 85.82 85.50
85.53 86.23 85.03
86.69 88.00m
GRASS 86.09 83.98
86.82 86.82 84.39 85.82 86.98
Vegetation 86.67
86.39 83.81 84.73 86.78
86.51
85.79
86.82
84.90 85.05 83.87 87.00
85.13
85.45 87.00m 86.31 83.90 86.72
83.74 87.00m
86.51 84.07 86.41 86.57 84.90
87.11
84.81
85.80
84.86 86.69
86.31 85.74 83.98 87.00m
86.71 86.30 86.88 86.90
84.71
84.58 85.67 86.50
84.81 84.65 86.90 83.79 85.64
85.23
85.81
84.70 86.37 86.23
85.59
83.81 84.50 86.20 84.76
84.69
84.76
86.54
84.34 86.00m 86.76 Water Level 09/03/2016 3.30pm 85.59
85.64 83.54 Pond 84.73 84.69
83.70
85.63
85.63 86.00m Post & Rail Fence 84.35
84.14 85.55 86.63
85.11
LP 86.09
85.62 83.46
86.46 87.15 85.61
83.87
83.52 83.95
GU
83.05 83.00 85.61
86.68 86.82
Fallen 86.05 84.32 86.36 83.43 84.53
84.54 83.31 86.06
84.57
85.96 84.49 86.04
83.00
84.55
86.11
83.52 83.31 86.75
83.70 86.51
82.91 84.57
87.03 85.51 83.97 84.41 84.49
85.65 84.51 84.57
86.37
86.16 84.22 86.93 85.64
85.10
85.98
84.12
86.84 85.88 83.01
83.44 85.17 83.91 86.02 84.65
86.95
85.70 84.41 84.16 86.26 Post & Rail Fence
84.57 83.52 86.32
86.41 84.89
85.91
86.69 82.68 83.12 85.19
86.06
86.36
84.13 drain Possible 86.22 85.04 84.38 83.74 85.42
84.90 85.28 84.36 85.98
84.96 84.93 86.02
83.55 84.22
85.09
TF85.26 84.53 85.50
85.28 85.58 86.18 86.32 85.59
84.29
82.96 85.45
84.20 86.25 84.26 85.30 84.30
SOIL/RUBBISH 84.68 SOIL/RUBBISH 84.17 85.33
83.50 86.00 85.49 86.22 84.23 84.27 85.10
84.95
85.75 86.99
84.71 85.91
TF87.47 86.55 85.10
84.99 85.68 85.39
86.15
85.89 84.21 85.47
84.18 85.08
83.36 84.18 84.97
85.20 85.36 86.05
84.55 LP
TF87.92 85.43 07 84.130 363694.760 431410.681
84.82 TC E N Ht
84.90 84.79 85.43 GU 83.87 85.47 85.95 83.10
84.23 85.32
84.62 SP
85.41 86.21 84.81 86.47
84.98 GRASS
84.03
86.51
83.47 85.16 85.51 85.56
84.01 84.59 85.38 85.39 83.91 84.83 84.70
84.05 SP
84.70 83.89
83.98
85.28
SOIL/RUBBISH 84.33 85.83 85.97 84.12
85.37 83.20 84.84 85.54
85.05 84.32 85.33
84.53 Post & Rail Fence 84.99 85.91 84.40 85.34
85.60 84.29 84.98 SOIL
84.00
86.16
85.00 Multi Stem Multi
84.16 85.70 83.75
84.98
85.05
83.84 83.57
85.42
84.81 83.88
84.68
83.59 83.84 84.14 85.09
83.86 85.20 83.41 84.44
84.21
85.20
84.11
84.94 83.92
85.65 84.05
GU 85.52
83.68 83.76