Authorities in Surrey are set to deploy advanced 3D mapping technology to investigate the sinkholes that appeared on Godstone High Street last week, forcing the evacuation of dozens of households.
Tandridge District Council’s leader, Catherine Sayer, confirmed that a remote sensing technique known as LiDAR (Light Detection and Ranging) will be used to create detailed 3D maps of the affected area. The decision to prioritize non-intrusive methods over borehole testing was made due to ongoing safety concerns.
Investigation Delayed for Safety Reasons
The sinkholes, which prompted the evacuation of 30 households—six of which have since returned—have raised alarm among residents and local authorities. While Surrey Highways initially planned to carry out borehole testing, those plans have now been postponed until next week.
“What I have seen is information that says the borehole testing is delayed, and they’re going to use less intrusive testing methods and survey methods,” said Ms. Sayer.
One of the primary technologies being considered is LiDAR, which uses laser pulses to measure distances and map the terrain. Originally developed in the 1970s for meteorology, LiDAR is now widely used in applications ranging from autonomous vehicles to geological surveys.
Specialist Equipment Expected on Site
A spokesperson for Surrey County Council, whose highways department is overseeing the investigation, stated that the necessary equipment is set to arrive on 26 February.
“We’re waiting for some specialist equipment to arrive on-site to carry out a further comprehensive assessment to ensure any stability and repair work is safe and designed properly,” the spokesperson said.
Security Measures Strengthened
Meanwhile, security around the site has been increased amid concerns about public safety. Surrey Police announced that additional measures, including enhanced perimeter fencing and 24/7 staffing by Ringway on behalf of Surrey County Council, have been implemented.
“In addition, CCTV cameras have been installed, and an overnight security guard has been provided by Tandridge District Council,” a police spokesperson said. “Surrey Police is supporting partners by providing advice on additional security measures that could be put in place by the local council.”
Community Meeting Planned
In response to residents’ concerns, Tandridge District Council will host a public meeting on Tuesday evening at St Nicholas Youth Centre. The meeting aims to provide updates on the investigation and address the impact of the sinkholes on local businesses and residents.
While the full extent of the underground instability remains unclear, authorities hope that the use of LiDAR and other remote sensing technologies will provide crucial insights into the cause of the sinkholes and guide future repair efforts.
