11547 South Gowerton Coal Mining Risk Assessment April 2017 · 2017. 5. 18. · GOWERTON SOUTH...

Intégral Géotechnique

Urban Style Land Limited Gowerton South Coal Mining Risk Assessment 11547/LP/17/CMRA

Integral Géotechnique

CLIENT: Urban Style Land Limited

PROJECT: Gowerton South

TITLE: Coal Mining Risk Assessment Report

JOB NO: 11547

DOCUMENT REF: 11547/LP/17/CMRA

Revision Purpose Description Originated Reviewed Authorised Date

0

Final

LP MJE HP April 2017

Geotechnical Engineers:

Intégral Géotechnique (Wales) Limited

Integral House

7 Beddau Way

Castlegate Business Park

Caerphilly

CF83 2AX

Tel: 029 2080 7991

Fax: 029 2086 2176

CONTENTS

1.0 INTRODUCTION

2.0 AVAILABLE INFORMATION

2.1 Site Location and Description

2.2 Site History

2.3 Geology

2.4 Mining

3.0 RISK OF PAST COAL MINING TO PROPOSED DEVELOPMENT

4.0 SITE INVESTIGATION TO ASSESS RISKS FROM PAST COAL MINING

4.1 Coal Authority Permission

4.2 Shallow Mine Workings

4.3 Mine Entries

5.0 REMEDIAL STABILISATION WORKS

5.1 Coal Authority Permission

5.2 Shallow Mine Workings

5.3 Mine Entries

6.0 CONCLUSION

APPENDICES

Appendix A Coal Authority Mining Report

FIGURES

Figure 1 Site Location

Figure 2 Site Plan

Figure 3 Mining Constraints Plan

Figure 4 Coal Authority Interactive Viewer Plan

GOWERTON SOUTH 11547/LP/17/CMRA

INTÉGRAL GÉOTECHNIQUE (WALES) LIMITED PAGE 1

1.0 INTRODUCTION

Urban Style Land Limited are proposing the development of a site at Gowerton South for

residential end use.

Intégral Géotechnique (Wales) Limited have been commissioned to carry out a Coal

Mining Risk Assessment of the proposed development site, in order to provide a risk

based approach to the development of the site.

The Coal Mining Risk Assessment:

presents the available data on the coal mining issues which are pertinent to the

site;

assesses the risk to the site from any known coal mining issues;

sets out appropriate mitigation (ground stabilisation) measures for dealing with

these mining issues, which can then be followed during the design and

development of the site.



2.0 AVAILABLE INFORMATION

2.1 SITE LOCATION AND DESCRIPTION

The site is located approximately 700m southeast of the centre of Gowerton, centred at a

National Grid Reference of 26778, 222440, see Figure 1.

The site is roughly rectangular in shape and occupies an area of approximately 6.3

hectares. The boundaries of the site are defined by rear gardens of housing fronting

Gorwydd Road to the western side. To the north is the residential development of the

former Cattle Market site. The eastern boundary is formed by slopes down to the

mainline railway from Swansea to Milford Haven. The southern boundary is formed by a

river flowing north westwards beyond which lie the rear gardens of the various housing

estates.

The site is typically on a north facing slope of the valley with overall shallow northerly and

north-easterly grades. The ground is typically wet and saturated. Various man made

channels have been cut through many of these areas to alleviate some of the wet ground.

A roughly central north-east trending area between adjacent tip areas is waterlogged with

varying areas of standing water. This may represent groundwater or water from mine

adits. No evidence of discoloured water was noted.

The majority of the area is raised and covered by tips of colliery spoil materials emanating

from the former colliery workings. The tips are generally undulate but generally elongate

fingers of materials showing progressive placement. Some tips are estimated to be up to

15m in height. Some areas adjacent the winding pit are evidently more ashy and clinkery

suggesting spoil from boiler houses. The entire area is covered by mature and semi

mature tress including ash, oak, holly, hazel etc.

Stands of Japanese Knotweed were evident bordering the stream that bounds the

eastern side of the site.

Some localised fly tipping is evident.

Visual indications of mine activities were noted. Centrally there is a brick chimney,

probably associated with the main winding pit of Gorwydd Colliery. The tips in this area

are ashier than elsewhere. The bases of the winding pit tower are evident. Masonry

walls are also present further suggesting more substantial infrastructure may be present.



2.1 SITE LOCATION AND DESCRIPTION (CONTINUED)

Several instances of ground profiles indicative of either mine adits or artificial drainage

channels were noted.

One large hole of 2m depth was noted in the central valley suggesting a partially open

mine shaft or possible collapse feature over abandoned workings.

2.2 SITE HISTORY

The recent history of the site has been traced with the aid of the following historical maps:

Map Scale Dates

1:2,500 1878-1879, 1898-1899, 1915-1916, 1935-1940, 1959, 1966, 1975-

1976, 1988-1989, 1993

1:10,560 1884, 1889, 1900, 1907, 1921, 1936, 1938, 1951

1:10,000 1964, 1968-1969, 1972-1974, 1982-1989, 1993-1995, 1999, 2006,

2010

The 1878-1879 map shows the southeast part of the site to be occupied by Gorwydd

Colliery. The southeast part of the site is occupied by spoil tips with three coke ovens

shown in the centre of the site, a smithy, a saw mill and several other associated

buildings. Several spur railway lines are shown to cross the site trending approximately

north-south to meet the main railway line immediately to the northeast of the site, trending

approximately northwest-southeast. The railway is on an embankment to the east of the

site and in a cutting to the north of the site. A tramway crosses the site trending

approximately east-west joining the spur railway lines to another railway line

approximately 40m southwest of the site at the closest also trending approximately

northwest-southeast. Two weighing machines are shown associated with the spur

railway lines. Gorwydd Road is shown, adjacent to the southwest site boundary at the

closest, and access roads from this to the main colliery cross the site. A small area of

marshy ground is shown near the centre of the site. The rest of the site is generally

covered in rough pasture and open fields. An issue is shown in the southern part of the

site, crossing the southern site boundary. The Gors-fawr Brook is shown to approach the

site from the south and follow part of the east and north site boundary before flowing

north towards a confluence with the River Llan approximately 200m north of the site. The

area to the south of the site is shown to be marshy and two air shafts are indicated

approximately 120m and 250m south of the site respectively. Generally the area around

the site is shown to be a network of open fields with some areas of rough pasture. A

further spoil tip and furnaces are shown approximately 100m southeast of the site.



2.2 SITE HISTORY (CONTINUED)

The 1898-1899 map shows the Gorwydd Colliery to be disused and much of the

associated infrastructure including most of the buildings, the spur railway lines and

weighing machines and tramway to have disappeared leaving just the spoil piles, which

have expanded into the southern part of the site.

Spoil piles are indicated on the northwest edge of the site, with a small area crossing the

site boundary. Residential development is indicated along the main road.

The 1915-1916 map shows that the only buildings to remain on the site are two

chimneys. The area approximately 100m to the north of the site is shown to be occupied

by the New Gorwydd Colliery with associated spoil heaps and spur railway line. A tank is

indicated along side the railway line approximately 40m north of the site. Residential

development is shown to have spread along Gorwydd Road. A small pond is shown on

the northwest site boundary.

The 1935-1940 map shows no significant changes to the site. The New Gorwydd Colliery

to the north of the site is no longer indicated and the majority of the infrastructure has

disappeared leaving only two small buildings, a chimney and the spoil heaps. Residential

development is shown to have expanded along Gorwydd Road. A Cattle Market is shown

approximately 150m northwest of the site with associated Cattle Pens. A Goods Shed is

shown approximately 60m north of the site along the railway. The furnaces to the east of

the site are no longer indicated.

The 1959 map shows the area of the spoil heaps to be covered in deciduous trees. Two

streams are shown to issue on the site and flow west and southeast respectively. A small

track, understood to be an old cattle track, is shown to cross the site trending

approximately north-south. Residential development is shown to have spread further

down Gorwydd Road, adjacent to the southwest site boundary. The buildings and

chimney associated with New Gorwydd Colliery to the north of the site are no longer

indicated, leaving just the spoil heaps in this area.

The 1966 map no longer indicates the presence of the southern chimney on the site. The

residential development is shown to have expanded along Gorwydd Road to the south of

the site. The railway line to the southwest of the site is indicated to be disused. The

Cattle Pens are no longer indicated.



2.2 SITE HISTORY (CONTINUED)

The 1975-1976 map shows no significant changes to the site. Residential development is

shown to have expanded to the south and east of the site. The railway line to the

southwest of the site is no longer indicated and the northern part of it is shown to have

been replaced with houses. The railway line to the northeast of the site is shown to have

reduced in width with many of the sidings and the Goods Shed no longer indicated. Two

electricity substations are indicated approximately 80m west and 80m southwest of the

site respectively.

The 1988-1989 map shows no significant changes to the site. Residential development is

shown to have expanded to the east of the site.

The 1993 map shows no significant changes to the site. Residential development is

shown to have expanded to the southeast and southwest of the site.

The 1999 and 2006 maps show no significant changes to the site or surrounding area.

The 2010 map shows no significant changes to the site. The Cattle Market to the

northwest of the site is no longer indicated and this area is shown to have been filled with

residential development.

2.3 GEOLOGY

The 1:50,000 scale geological map of the area indicates it to be underlain by the Upper

Pennant Measures of Carboniferous age, generally comprising sandstone with seams of

coal.

The conjectured outcrop of the Penyscallen seam is shown immediately to the north of

the site and the conjectured outcrop of the Swansea Four-Feet seam is shown to cross

the northern part of the site. The conjectured outcrops of further coal seams are shown

to the south of the site, including the Swansea Five-Feet, Swansea Six-Feet, Swansea

Three-Feet and Swansea Two-Feet seams, all trending approximately northwest-

southeast.

The geology is shown to dip towards the northeast, with dip angles to the south of the site

ranging between 30°and 38° although it is likely that the angle of dip will be shallower

under the site as the Gowerton Synclinal axis is indicated to the north of the site.

Abandonment plans indicate more likely dips of 26° to 27° beneath the site.



2.3 GEOLOGY (CONTINUED)

The solid geology is shown to be overlain by undifferentiated Glacial Drift, with Alluvium

indicated to be present in the eastern part of the site, associated with Gors-fawr Brook.

Made ground is known to be present across the site due to the site’s historical use as a

colliery and spoil heaps of up to 15m in height were observed during the walkover.

A summary of the anticipated geological succession is given below in Table 1.

Table 1: Summary of Anticipated Site Geology

Geological unit Horizon Description

Recent Made ground Various materials

Recent (eastern part of

site)

Alluvium Clay matrix with varying quantities of sand

and gravel

Pleistocene Glacial Drift Gravel, sand and clay.

Carboniferous Upper Pennant Measures Sandstone with coal seams.

2.4 MINING

A Coal Mining Report for the site has been obtained from the Coal Authority and a copy is

included in Appendix A. This indicates that the site is within the likely zone of influence

from workings in four seams of coal at shallow to 280m depth and last worked in 1900.

The plans indicate the presence of 9 mine entries within, or within 20m of, the boundary

of the site, including 2 disused adits and 7 disused mineshafts.

The Coal Authority states that it is not aware of any damage due to geological faults or

other lines of weakness affected by coal mining.

Mining Abandonment Plans obtained from the Coal Authority confirm the geological

information discussed previously, and indicate the presence of workings in the Swansea

Four-Feet, Swansea Five-Feet, Swansea Six-Feet and Swansea Three-Feet seams.



3.0 RISK OF PAST COAL MINING TO PROPOSED DEVELOPMENT

Mining Abandonment Plans obtained from the Coal Authority indicate the presence of

workings in the Swansea Four-Feet, Swansea Five-Feet, Swansea Six-Feet and

Swansea Three-Feet seams.

An adit and slant is shown in the north of the site into the Swansea Four-Feet seam, with

shallow workings indicated to the northeast of the conjectured outcrop of the coal seam.

A potential mining hazard zone is defined associated with this seam.

An adit is also shown just south of the south site boundary, with workings extending to the

northeast of the conjectured outcrop below the site. A potential mining hazard is defined

associated with this seam.

A cross section down Gorwydd Winding Pit indicates the Swansea Five-Feet seam to be

the shallowest at this point, being encountered at approximately 56m below ground level.

The Swansea Six-Feet and Swansea Three-Feet seams are indicated to be

approximately 133m and 158m below ground level respectively with the associated

workings also at this depth and therefore unlikely to impinge on the site. Shallower

unrecorded workings cannot be ruled out.

The collapse of any workings in shallow seams could lead to void migration up to the

surface, if there is insufficient rock cover above the workings to prevent this happening.

Any resulting surface subsidence could cause subsequent structural damage to buildings

erected within the site. Hence wherever inadequate thicknesses of competent cover are

present a mining risk is identified.

In view of this, a borehole investigation would be required to confirm the presence and

depth of any shallow coal seams beneath the site and to assess the risk of associated

mining risks. The risk could be present across the entire site, although the shallowest

workings would be more likely within the southwest area of the site.

A survey plan showing the mining constraints is presented in Figure 3. This plan

compares well with the high development risk zones defined by the Coal Authority on the

interactive web viewer service. An extract from this plan is presented in Figure 4.

In addition to the three adits and seven shafts identified by records, there is also potential

risk of old unrecorded mine entries to the shallow Swansea Four Feet seam. Soil

stripping and/or geophysical surveys may therefore be required to check for possible old

unrecorded mine entries. The approximate location of known features are shown on

Figure 3.



4.0 SITE INVESTIGATION TO ASSESS RISKS FROM PAST COAL MINING

4.1 COAL AUTHORITY PERMISSION

Prior to carrying out any investigation works, it will be necessary to obtain permission

from the Coal Authority for any works that intersect coal seams or associated workings.

Appropriate risk assessments will need to be carried out as part of the permission

application.

4.2 SHALLOW MINE WORKINGS

In order to confirm the findings and conclusions of the desk study and examination of the

abandonment plans, it is recommended that boreholes are drilled across the site.

Sufficient boreholes will need to be drilled to enable the depth of the shallowest coal

seams/associated workings to be intercepted, and the thickness of the overlying rock

cover to be understood and assessed. The boreholes should be drilled down to depths of

typically 25m to 30m, this being greater than 10 times the seam thickness, which is a

general rule for shallow mine workings. The Swansea Four Feet seam is anticipated to be

0.6 to 1.2m in thickness but the workings may include main roadways up to approximately

1.5m in height. The Swansea Five Feet is anticipated to be 1.2m in thickness, the

Swansea Six Feet 2.7m in thickness and the Swansea Three Feet 1.5m in thickness.

The seam depth and rock cover thickness data derived from the borehole investigations

will enable the potential mining risk from shallow underlying recorded or unrecorded

workings to be assessed and appropriate mitigation measures to be decided.

As discussed above, a risk assessment should be carried out as part of the application for

permission to drill, in order to consider and minimise any risks from a rotary drilling

investigation, such as potential displacement of mine gases from workings underneath

neighbouring properties and houses. The likely volatility of the coal seam and the

potential for spontaneous combustion should also be considered.

Air flush drilling techniques could be used, provided that they are located sufficiently far

enough away from any neighbouring houses, such that they do not present a significant

risk. If any boreholes need to be drilled within 50m of existing properties, then water

mist/flush should be used to reduce the potential risks.

On completion of the drilling investigation, the boreholes will need to be backfilled and

sealed with a cement based material, in order to prevent ingress of air in to workings.



4.3 MINE ENTRIES

The plans indicate the presence of 9 mine entries within, or within 20m of, the boundary

of the site, including 3 disused adits and 7 disused mineshafts. The various mine shaft

and adit entries will require accurate location and assessment. However, records could

be incomplete and consequently there may be in mine entries in the local area which The

Coal Authority has no knowledge of.

Soil stripping and/or geophysical surveys may therefore be required to locate these

features and also to check for possible unrecorded mine entries.



5.0 REMEDIAL STABILISATION WORKS

If remedial works are required, their scale will depend on the level of mining risk that is

assessed from the borehole investigations.

5.1 COAL AUTHORITY PERMISSION

It will be necessary to obtain the relevant permission from the Coal Authority prior to

carrying out any proof drilling or drilling and grouting works, if these should become

required. All works will need to gain their approval.

5.2 SHALLOW MINE WORKINGS

Once the general site geology has been confirmed and the level of risk from shallow mine

workings has been assessed, it may be considered that some parts of the site are at risk

from shallow mining and, therefore, that these areas may require remedial works or

appropriate precautions.

Whenever a coal seam, and possible/proven associated workings, are found to be

present within potential influencing depths of the site surface, remedial works may be

required in order to develop the site safely.

Prior to finalising any foundation design, proof drilling and grouting measures may be

required wherever a coal seam and/or associated proven/potential working are found to

underlie the site within potential influencing shallow depths.

The level of the required foundation reinforcement could range from light reinforcement

where the risk of shallow mining related subsidence is thought to be low, to raft

foundations capable of spanning 3m voids with 1.5m cantilever effects at the edges,

where the shallow mining risk is thought to be high.

Proof drilling works may confirm that the seam/workings are not present within shallow

potentially influencing depths, or that there is sufficient overlying rock cover above any old

workings to prevent any remnant uncollapsed voids migrating up to the site’s surface from

proven or potential underlying shallow workings, thereby causing surface subsidence.

Proof drilling may also establish that the workings, although shallow, are already

collapsed or mostly collapsed. Therefore, the incorporation of appropriate reinforcement

within the foundations may be considered sufficient protection against possible remnant

mining subsidence risk.



5.2 SHALLOW MINE WORKINGS (CONTINUED)

Where a coal seam and/or workings are considered to be shallow enough, consideration

could alternatively be given to carrying out bulk coal recovery excavations if this is

practical and acceptable from an environmental standpoint. This would effectively remove

any risk from shallow mining, but would require closely supervised replacement of the

excavated overburden soils and rocks to an appropriately engineered standard that would

be suitable for developing residential properties on.

5.3 MINE ENTRIES

All encountered mine entries should be suitably investigated and assessed for any

associated treatment / building exclusion zones.

In the case of a shaft, boreholes should be drilled down the shaft in order to establish the

depth of the base of the shaft and the state of any backfill. Safety stagework will need to

be established across the shaft prior to any drilling works. A borehole would also need to

be drilled outside the shaft in order to confirm the rock head level around the shaft.

Subject to the depth of the surrounding rockhead, the cap can be constructed ideally on

the rockhead or, alternatively, (if the rocks are considered to be too deep) at shallower

depths within suitably competent overlying soils.

The design and construction of the cap will need to comply with Coal Authority

specifications and will need to be agreed with the Coal Authority. A building exclusion

zone should be established around the shaft, and its size will be dependent on the size of

the shaft and the depth to the rockhead around the shaft.

For any old known or uncharted levels or adits, the entrance should be investigated and,

if necessary, treated in order to ensure that the ground has been fully collapsed and that

the infill has been appropriately engineered to allow developments at the surface. The

orientation of the entry should be established and boreholes may be required to establish

the line of any cross measures drivages connecting the level entrances to the coal seam

workings. Bulk excavations may be required in order to appropriately remediate any

encountered level entrances.

Wherever feasible, it would be preferable to design the site layout such that the proposed

houses are located away from the locations of the former level entrances.



6.0 CONCLUSION

Based upon the findings of this Coal Mining Risk Assessment, we are of the opinion that

the site can be suitably and safely developed, subject to carrying out the recommended

mining site investigation works and then carrying out the mitigation measures detailed in

Section 5.0, if they should be considered necessary.

APPENDIX A

COAL AUTHORITY MINING REPORT

© The Coal AuthorityPrinted:24 Feb 2011Page 1 of 6

The Coal Authority, Mining Reports Office, 200 Lichfield Lane, Berry Hill, Mansfield, Nottinghamshire NG18 4RGON-Line Service: www.groundstability.com - Phone: 0845 762 6848 - DX 716176 MANSFIELD 5

OFFICE MANAGER, INTEGRAL GEOTECHNIQUE (WALES) LTD., INTEGRAL HOUSE 7, BEDDAU WAY, CAERPHILLY, MID GLAMORGAN, CF83 2AX

Person dealing with this matter:

Our reference:

Your reference:

Date of your enquiry:

00011289-11

SM5255/MJE

22 February 2011

Land At, Gorwydd Road, Gowerton, Swansea, West Glamorgan

Information from the Coal AuthorityUnderground Coal Mining

The property is in the likely zone of influence from workings in 4 seams of coal at shallow to 280mdepth, and last worked in 1900.

The property is not in the likely zone of influence of any present underground coal workings.

The property is not in an area for which the Coal Authority is determining whether to grant a licence toremove coal using underground methods.

The property is not in an area for which a licence has been granted to remove coal using undergroundmethods.

Non-Residential Coal and Brine Report

Electronic Ref: EME_00015458030001_005

RRUID: 005.00015458030001

Coal mining

Brine Compensation District

Yes

No

This report is based on and limited to the records held by, the Coal Authority, and the Cheshire BrineSubsidence Compensation Board's records, at the time we answer the search.

Issued by:

Date we received your enquiry: 22 February 2011Date of issue: 24 February 2011

All rights reserved. You must not reproduce, store or transmit any part of this document unless you have our written permission.

Past

Present

Future

This report is for the property described in the address below and the attached plan.

CON29M Non-Residential 00011289-11

Louise Tipper


Mine entries

Coal-mining geology

Opencast Coal Mining

Coal-mining subsidence

Mine gas

Hazards related to coal mining

Withdrawal of Support

The property is not in an area that is likely to be affected at the surface from any planned futureworkings.However reserves of coal exist in the local area which could be worked at some time in the future.

No notice of the risk of the land being affected by subsidence has been given under section 46 of theCoal Mining Subsidence Act 1991.

Within, or within 20 metres of, the boundary of the property there are 9 mine entries, the approximatepositions of which are shown on the attached plan.There is no record of what steps, if any, have been taken to treat the mine entries.

Records may be incomplete. Consequently, there may exist in the local area mine entries of which theCoal Authority has no knowledge.

The Authority is not aware of any evidence of damage arising due to geological faults or other lines ofweakness that have been affected by coal mining.

The property is not within the boundary of an opencast site from which coal has been removed byopencast methods.

The property does not lie within 200 metres of the boundary of an opencast site from which coal isbeing removed by opencast methods.

The property is not within 800 metres of the boundary of an opencast site for which the Coal Authorityis determining whether to grant a licence to remove coal by opencast methods.

The property is not within 800 metres of the boundary of an opencast site for which a licence to removecoal by opencast methods has been granted.

The Coal Authority has not received a damage notice or claim for the property since 1 January 1984.There is no current Stop Notice delaying the start of remedial works or repairs to the property.The Authority is not aware of any request having been made to carry out preventive works before coalis worked under section 33 of the Coal Mining Subsidence Act 1991.

There is no record of a mine gas emission requiring action by the Coal Authority within the boundary ofthe property.

The property has not been subject to remedial works, by or on behalf of the Authority, under itsEmergency Surface Hazard Call Out procedures.

The property is not in an area for which a notice of entitlement to withdraw support has been published.

Past

Present

Future



Working Facilities Orders

Payments to Owners of Former Copyhold Land

Comments on Coal Authority information

Information from the Cheshire Brine Subsidence Compensation Board

The property is not in an area for which a notice has been given under section 41 of the Coal IndustryAct 1994, revoking the entitlement to withdraw support.

The property is not in an area for which an Order has been made under the provisions of the Mines(Working Facilities and Support) Acts 1923 and 1966 or any statutory modification or amendmentthereof.

The property is not in an area for which a relevant notice has been published under the Coal IndustryAct 1975/Coal Industry Act 1994.

In view of the mining circumstances a prudent developer would seek appropriate technical advicebefore any works are undertaken.

Therefore if development proposals are being considered, technical advice relating to both theinvestigation of coal and former coal mines and their treatment should be obtained before beginningwork on site. All proposals should apply good engineering practice developed for mining areas. Nodevelopment should be undertaken that intersects, disturbs or interferes with any coal or mines of coalwithout the permission of the Coal Authority. Developers should be aware that the investigation of coalseams/ former mines of coal may have the potential to generate and/or displace underground gasesand these risks both under and adjacent to the development should be fully considered in developingany proposals. The need for effective measures to prevent gases entering into public properties eitherduring investigation or after development also needs to be assessed and properly addressed. This isnecessary due to the public safety implications of any development in these circumstances.

The attached plan shows the approximate location of the disused mine entry/entries referred to in thisreport. For reasons of clarity, mine entry symbols may not be drawn to the same scale as the plan.Property owners have the benefit of statutory protection (under the Coal Mining Subsidence act 1991*).This contains provision for the making good, to the reasonable satisfaction of the owner, of physicaldamage from disused coal mine workings including disused coal mine entries. A leaflet setting out therights and the obligations of either the Coal Authority or other responsible persons under the 1991 Actcan be obtained by telephoning 0845 762 6848 or online at www.coal.gov.uk/services/subsidence.If you wish to discuss the relevance of any of the information contained in this report you should seekthe advice of a qualified mining engineer or surveyor. If you or your adviser wish to examine the sourceplans from which the information has been taken these are normally available at our Mansfield office,free of charge, by prior appointment, telephone 01623 637233. Should you or your adviser wish tocarry out any physical investigations that may enter, disturb or interfere with any disused mine entry theprior permission of the owner must be sought. For coal mine entries the owner will normally be theCoal Authority.The Coal Authority, regardless of responsibility and in conjunction with other public bodies, provide anemergency call out facility in coalfield areas to assess the public safety implications of mining features(including disused mine entries). Our emergency telephone number at all times is 01623 646333.

*Note, this Act does not apply where coal was worked or gotten by virtue of the grant of a gale in theForest of Dean, or any other part of the Hundred of St. Briavels in the county of Gloucester.

A site investigation was carried out in 2005 by Integral Geotechnique 50 Cathedral Road Cardiff CF119LL.

The property lies outside the Cheshire Brine Compensation District.



Additional remarksThis report is prepared in accordance with the Law Society's Guidance Notes 2006, the User Guide2006 and the Coal Authority and Cheshire Brine Board's Terms and Conditions 2006. The report iscompliant with Home Information Pack requirements.

The Coal Authority owns the copyright in this report. The information we have used to write this reportis protected by our database right. All rights are reserved and unauthorised use is prohibited. If weprovide a report for you, this does not mean that copyright and any other rights will pass to you.However, you can use the report for your own purposes.


© The Coal AuthorityPrinted:24 Feb 2011Page 5 of 6CON29M Non-Residential 00011289-11

Location map

Approximatepositionof property

Enquiry boundary These maps are reproduced from Ordnance Survey materialwith the permission of Ordnance Survey on behalf of theController of Her Majesty's Stationery Office. © Crowncopyright. Unauthorised reproduction infringes Crowncopyright and may lead to prosecution or civil proceedings.The Coal Authority. Licence number: 100020315. [2006]

Approximate position of enquiry boundary shown

Key

Disused Adit or Mineshaft

FIGURES

Intégral House7 Beddau WayCastlegate Business ParkCaerphillyCF83 2AXTel: 029 2080 7991Fax: 029 2086 2176

FIGURE 1 - SITE LOCATION Integral Géotechnique

NORTH

South Gowerton

SITE LOCATION

FIGURE 2: SITE PLANIntégral House7 Beddau WayCastlegate Business ParkCaerphillyCF83 2AXTel: 029 2080 7991Fax: 029 2086 2176


South Gowerton

NORTH

SITE BOUNDARY

INDICATIVE MASTER PLAN LAYOUT

FIGURE 3: MINING CONSTRAINTSIntégral House7 Beddau WayCastlegate Business ParkCaerphillyCF83 2AXTel: 029 2080 7991Fax: 029 2086 2176


South Gowerton

NORTH

FIGURE 4: COAL AUTHORITY INTERACTIVE VIEWER PLANIntégral House7 Beddau WayCastlegate Business ParkCaerphillyCF83 2AXTel: 029 2080 7991Fax: 029 2086 2176


South Gowerton

NORTH

DEVELOPMENT HIGH RISK AREAS AND COAL OUTCROPS

VERY APPROXIMATE SITE BOUNDARY

11547 South Gowerton Coal Mining Risk Assessment April 2017 · 2017. 5. 18. · GOWERTON SOUTH...

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