Let Geoinvestigate quote for your Walkover Mining Survey, Walkover Mine Shaft Survey or Mine Shaft Inspection Survey. Save time and money with us! Our geologists and coal mining experts provide a fast turnaround professional nationwide mine shaft walkover survey and site inspection service for general mining hazard, mine entries, mine shafts, mineworking subsidence and ground instability. Recently we have completed mine working walkover surveys in Bristol, Newcastle, Birmingham, Manchester, Barnsley, Glasgow and Edinburgh.
Please contact Ross Nicolson or Stuart Howe for advice or a Walkover Mining Survey quote on T. 015394 44485 (Ross Mob. 07747612732) or Head Office T. 01642 713779 or email firstname.lastname@example.org or email@example.com
Geoinvestigate also provide Coal Mining Risk Assessment CMRA reports and highly competitive follow-on coal intrusive site investigation and drilling and mine working exploration drilling services.
If you are buying or selling a house, land or commercial property the mine entry interpretive report or mine search report you have obtained may require that you take further action and that you appoint a professional geological company like Geoinvestigate to carry out a mineworking, mine shaft inspection or mine entry walkover survey. When applying for a purchase loan your lender, mortgage company or bank may request this information as part of the loan application process.
Geoinvestigate provide expert site inspection services of properties at risk from mine working, mine shaft and mine entry hazard. If you’ve had a mine search report done and you need a follow-on site inspection or walkover survey and a mining geologist or mining engineers report on ground stability we have the right team of experienced professionals to carry out the work quickly and reliably.
The Coal Authority and Terrafirma Mine Searches Ltd and others provide interpretive mining search reports identifying mining hazards with mining hazard maps including information on coal mine entries, mine shafts, coal pits, collieries, mine adits, mine drifts, opencast mine working, mining subsidence, mine gas and geological faults. Some reports provide subsidence risk analysis rating the mining hazard at a specific property in terms of High, Medium or Low Risk with the recommendation for Further Action. Other reports such as the Coal Authority’s CON29M are more factual identifying the approximate location of the mine shaft or mine entry in relation to the boundary of the property – “mine entry within or within 20m of the property boundary” is an often mentioned outcome.
Coal mine entries, mine shafts, coal pits, mine adits, drifts and levels are the coal mining hazards most likely to be flagged up in a Coal Authority Mine Entry Interpretive Report and the most likely to significantly impact the outcome of a subsidence risk assessment such as that provided by Terrafirma Mine Searches and others. While mining subsidence risk assessment is by its nature conservative and in the case of Terrafirma Mine Searches service some might perhaps even say overly pessimistic they can be a useful starting point for identifying mining hazard and considering its impact on property value.
The starting point for a walkover survey or site inspection of a mine entry or coal mine shaft is the coal mining report CON29M or the Coal Authority’s more detailed mine entry interpretive report containing various levels of subsidence risk analysis, factual coal mine search information and a mining hazard or shaft location map. Both the Coal Authority and Terrafirma Mine Searches provide reliable basic information on the nature of mining hazard and in respect of coal mine shafts the approximate locations of mine entries shaft diameter, mine shaft depth, drift depth, adit azimuth and mine shaft treatment details are given where available.
A mining Walkover Survey is what it says – a walkover survey of the site or a surface site inspection where mine hazard has previously been identified looking for evidence of mining subsidence and mine hazard location. A coal mining walkover survey or site inspection also known as a reconnaissance survey or mine inspection survey should be carried out by a Competent Person typically a mining geologist, mining engineer, mineral surveyor, geotechnical engineer or geo-environmental engineer. Preferably the mining hazard inspector should be a Competent Person with experience in mining or tunneling though sadly this experience is rare in the UK today even within the UK Coal Authority. Knowledge of Coal Mining Risk Assessment, CMRA and the follow-up drilling investigation of coal mine working hazard and mitigation and remediation methods is further useful expertise.
Geoinvestigate Limited are fully qualified and experienced to carry out coal mine and other tin, copper, lead, chalk stone mining walkover surveys and surface site inspections having also underground mining and tunneling expertise. Geoinvestigate’s background in Coal Mining Risk Assessment CMRA and follow-on coal and mine working drilling intrusive site investigation using the company’s state of the art, safe, high speed coal and mine working Microdrill adds a further exceptional dimension to our understanding of coal mining hazard, mining subsidence risk assessment, intrusive mine working investigation and mine working mitigation and remediation.
In recent months Geoinvestigate has seen an increase in the number of coal mining subsidence risk analysis reports recommending further ACTION in the form of a walkover mining surveys and walkover mine shaft surveys, mine shaft site inspection, site reconnaissance visits or further intrusive ground investigation the latter typically requiring mine drilling or trenching or a site scrape. The requirement for further action seems particularly to be a frequently recurring outcome of the recently introduced Terrafirma Mine Searches Ltd subsidence risk report and other mine search providers are likely to follow suit as the industry becomes more cautious and risk averse. The recent coal mining subsidence catastrophe at Bayfield Estate, West Allotment near Newcastle where 19 houses have been demolished and extensive stabilisation works have been carried out on others because of ground instability are likely to contribute to this trend. In the wake of this nationally reported incident the Coal Authority is shortly to announce changes to coal mining ground investigation and site investigation expected to result in some instances in more borehole numbers and deeper holes. The outcome of the Coal Authority’s recommendations are eagerly awaited by the coal mining investigation and coal drilling industry and by Geoinvestigate’s coal mining experts.
Before Geoinvestigate’s coal mining inspectors carry out a walkover coal mine shaft survey, mininig survey or a mine working site inspection survey at a property we carry out a Phase 1 desk study to see if we can identify problems before we arrive at site. This would include reviewing either the Coal Authority or Terrafirma Mine Search report, Street View images and other online coal mining legacy information. Geoinvestigate are also expertly qualified to carry out Coal Mining Searches, Coal Mining Risk Assessment, CMRA and mining Subsidence Risk Analysis.
When one of our coal mining or ground stability inspectors or mining geologists carry out a mine entry or coal mine shaft walkover survey or mining site inspection of a property they look for evidence that might be indicative of mining related problems and land instability. Building or ground distortions, depressions, sagging or ponding water on a the lawn, patio or driveway, pavement or road may be indicative of mine shaft presence or even advanced mining sinkhole or coal mining crown-hole development. A sagging brick wall may be a tell-tale that a mine shaft below it has settled, subsided or has become unstable and may be about to form a crown hole. Sagging block work on a driveway can be indicative of underlying mine shaft instability.
Geoinvestigate’s mine shaft surveys and mine working surveys are carried out in accordance with the general best practice as well as Field Reconnaissance guidance presented in Chapter 11, page 5 CIRIA (Draft Report) Abandoned Mine Workings RP940/C758 which replaces SP32 Construction over abandoned mine workings published in 1984. CIRIA Report C758 Abandoned Mine Workings is expected to be released in 2019.
Here’s some examples of mine shaft problems Geoinvestigate identified from a preliminary Phase 1 desk study and walkover mine working and mine shaft survey.
2017 hole suddenly appears in the West Midlands near Birmingham in an area of historic coal mining
2016 Street image shows the driveway wall and driveway blockwork is sagging – precursors to crown hole or mine shaft collapse
Sagging brick wall and extension of brickwork may show actual coal mine shaft to left of Coal Authority plotted position?
Coal Authority plotted approximate coal mine shaft position on a street in Bristol.
Mining hazard survey Barnsley. Sagging and cracking of walls perhaps indicative of shallow coal mining subsidence or the presence of a coal mine shaft.
Walkover survey finds recent circular subsidence feature indicative of mine shaft or mining crown hole instability under table
Sagging wall and broken concrete slab indicative of mine shaft instability. Shaft to left of Geoinvestigate inspector
Desk study identifies dark moist patch in lawn indicative of sagging mine shaft or domestic water well near Birmingham
Shaft subsequently collapsed and identified as a domestic water well rather than coal mine entry
Coal Authority identify 2 shafts at the front of Nos 71 & 69. Sagging wall may show mine shaft instability
Coal Authority CON29M report identifies coal mine entry mine near cracking, sagging & building tilt
Desk study identifies darker circular depression in lawn corresponding with CON29M mine shaft position
Recent ground instability and formation of subsidence trough over old mine stope?
Desk study identifies building distortion and cracks due to coal mine shaft instability in Oldham
Geoinvestigate provide expert site inspection services of properties at risk from mine working and mine shaft hazard. If you have a mine search report by the Coal Authority or Terrafirma Mine Search or another and you need a follow-on mining site inspection or a mine shaft walkover survey and a mining geologist or mining engineers report on ground stability we have the right team of experienced professionals to carry out the work quickly and reliably.
Here’s a recent Walkover Mine Shaft Survey we did in Manchester. The mine shaft hazard is believed to be located somewhere under the main road adjacent to the property. One of Geoinvestigate’s expert mining inspectors visited the property and carried out a detailed walkover mining survey looking for signs indicative of mining subsidence such as building cracks, building tilt, distorted windows and door frames, sagging ground and depressions, uneven paving and ponding water.
Mine Search report plotted coal mine entry/mine shaft position some where under the main road at this Manchester location.
Geoinvestigate’s walkover mine shaft survey of property, building and road identifies NO PROBLEM
On this occasion after thorough interrogation of the building and the surrounding area Geoinvestigate’s coal mining inspectors assessment was NO PROBLEM. Yes there was minor wall cracking but this was evidence of historical structural problems namely rusting expanding steel lintels and perhaps drain repairs but nothing that pointed to mining subsidence. Geoinvestigate’s expert mine shaft walkover survey report cxoncluded that there was no obvious visible surface evidence inidcative of mine shaft or shallow mine working movement. Consequently our site inspection report recommended that the purchaser should be awarded a full mortgage without any reduction or penalty for mine shaft proximity.
However because of the probable presence of shallow mine working Geoinvestigate recommended that were the house to be extended at a future date a Coal Mining Risk Assessment or CMRA should be carried out though this did not impact the outcome of the current purchase loan application. Geoinvestigate were also able to assist the purchasers with an estimate of the cost of a Coal Mining Risk Assessment CMRA and follow-on shallow mine drilling works just in case the latter might might be necessary.
Let Geoinvestigate quote for your Walkover Mine Survey and save time and money with us. Our mining experts provide a nationwide professional fast turnaround mine shaft walkover survey and site inspection service for mining hazard, mine entries, mine shafts and mine working subsidence and ground instability. Recently we have completed mine working walkover surveys in Bristol, Newcastle, Birmingham, Manchester, Barnsley, Glasgow and Edinburgh.
If you are buying or selling a house, land or commercial property the mine entry interpretive report or mine search report you have obtained may require you to carry out a mine shaft walkover survey. When applying for a purchase loan your lender, mortgage company or bank may request this information as part of the loan application process.
Geoinvestigate provide expert site inspection and walkover mine shaft survey services of properties at risk from mine working and mine shaft hazard. If you have had a mine search report done and you need a follow-on site inspection and a mining geologist or mining engineers report on ground stability we have the right team of experienced professionals to carry out the work quickly and reliably. Call or email us to discuss how we can help you whether its coal mining risk analysis, coal mining risk assessment CMRA, Walkover Survey or a subsequent coal drilling site investigation.
Please contact Ross Nicolson or Stuart Howe for advice or a Walkover Mining Survey quote on T. 015394 44485 (Ross Mob. 07747612732) or T. 01642 713779 or email firstname.lastname@example.org or email@example.com