Ground Stability

Innovation in Cornish Property Risk Assessment

Cornish mining expert, Cornwall Consultants and national mining and ground report specialist, Terrafirma, have announced a collaboration that sees the launch of a new Ground Report combining leading digital mapping and data analysis with ‘on-the-ground’ experience…

Introducing: The Ground Report

Terrafirma, an expert provider of environmental information and data intelligence, today launched the Ground Report, a risk and liabilities report designed to enable property professionals to better identify, manage and resolve ground and environmental hazards…

Shaft swallows car park in St. Ives, Cornwall

Late on Saturday 28th April, a 40ft deep and 3ft wide hole opened in a car park in Garth-An-Creet, St. Ives, Cornwall. Local emergency services were called to assess the scene and undertake work to prevent the hole from widening and affecting nearby properties. Subsequent investigation by Terrafirma concludes the hole was created by the collapse of a disused mine shaft.

Sinkhole Appears in Rugby Pitch in Swansea

A sinkhole which is said to have collapsed on the 14th February 2018 appeared in the corner of one of the Morriston RFC rugby pitches in Heol Gwernen, Cwmrhydyceirw.

SinkholeAlert: Demonstrating Disaster with Data

Exploring the themes behind Sinkholes in the UK

At Terrafirma, understanding the ground is what we do best: Our CEO Tom Backhouse was recently asked to feature in Channel 5’s documentary Sinkholes to provide an expert insight into the roots behind their cause. Inevitably then, when high profile sinkholes such as those at Fontmell Close, in St Albans or in Wednesbury, causing up to six million pounds of damage and evacuating families from their homes, we ask ourselves “can sinkholes be predicted?”.

Over the last few months and years, the experts at Terrafirma have meticulously observed, understood and recorded each sinkhole as they form. Now, armed with this information, Terrafirma is proud to present a new dataset and report feature; ‘SinkholeAlert’, allowing our team to examine the common themes behind these hidden dangers. 

Sinkholes: Explained

Delve behind the scenes of the Channel 5 documentary on Sinkholes.

The word sinkhole has become a term broadly used term to describe any hole in the ground created by erosional processes and the drainage of water. Ground hazards in the UK are often synonymous with the word sinkhole which can span from just a few feet in diameter to gigantic chasms large enough to swallow whole buildings.

They can have devastating consequences as can be seen on the new three-part Sinkhole documentary which began on Monday 20 November on Channel 5 and features extensive commentary from sinkhole expert and Terrafirma CEO and founder, Tom Backhouse.

Most recent of long legacy of Sinkholes appears in Ripon

On the 9th November 2016 a naturally occurring sinkhole opened up on Magdalens Road near the River Ure in west Ripon. The collapse, reaching depths of 9m, measured 10m x 20m and extended into the back gardens of three households.  The sewage system connecting the residencies collapsed and a safety parameter was set up resulting in the evacuation of 12 homes. On the 11th November BGS undertook investigation works concluding that the site remained at risk of further slippage. Monitoring continued, especially of the surface tension fractures which when recorded, had extended to twice the distance of the collapses 10m surface footprint. The BGS response team, after completing data collection, liaised with Harrogate Borough Council, North Yorkshire Fire and Rescue Service, and utility services in regards to ground stability. Currently, the team then returned to the BGS to analyse the field data. Following this, the Harrogate Borough Council officers met with representatives of North Yorkshire County Council highways department, Yorkshire Water and Northern Powergrid. As of the 14th of November all residents remained displaced, with utility companies working towards making plans for temporary solutions.