Hey there. I operate a geotechnical engineering contracting firm in Yorkshire. I have been doing this for 11 years.
the majority of our work is investigating mining issues and treating them via grout injection
it’s this part that’s important
“The property is in an area where records indicate there is coal at or close to the surface. Although there is no record of this shallow coal having been worked it may have still have been worked at some time in the past.
If this shallow coal has been worked it can represent an increased risk of subsidence.”
This basically means that the property is in a development high risk area and is situated over economic seams of coal. These may have been worked in the past and this was often not recorded at all or poorly recorded. The reason it is poorly recorded is because this was probably undertaken 100-150 years ago on an ad hoc basis. There wasn’t the pressures on land there is now nor the understanding of structural / civil engineering.
if this was a development site and not presumably a house you’d have to have it investigated by intrusive rotary investigation under a coal permit and if problems were found then grouted and the foundations designed with heavy reinforcement in
if it’s an existing house and is quite old (50+ years) then any issues would be remediated by the coal authority should they occur.
there are situations such as if the house has had a coal claim and it’s been paid out that you need to watch out for thought.
id speak to a local geotechnical engineer who knows the area and ask there advice. If it was a house in Yorkshire I could be more help…
