The UK and Ireland boast a vast network of underground utility, building, and transport infrastructure. There’s an estimated 4 million kilometres of pipes, electricity and telecoms cables, and sewers lying beneath our feet.
This intricate web of subsurface assets is in a constant state of change. In fact, the National Underground Asset Register (NUAR) in the UK reports that a hole is dug every seven seconds to access these underground utilities for repairs, upgrades, and installations. This ever-changing landscape is a testament to centuries of investment, dating back to the early 1800s when the first pipes were laid.
Navigating this complex underground network creates significant challenges for developers and landowners alike. With centuries of infrastructure hidden below ground, understanding what lies beneath can be a daunting task. The potential economic costs and health and safety risks associated with misidentifying or damaging underground utilities are substantial. The Utility Strike Avoidance Group estimates that the UK experiences around 60,000 accidental strikes on utility infrastructure annually. These incidents can lead to injuries, project delays, traffic disruptions, and significant economic losses, with total costs estimated at £2.4 billion per year.
What is a Subsurface Survey?
Subsurface surveys identify and verify the location and depth of buried services, features, materials, and voids. This geospatial certainty is essential for confident planning, design, and construction. Our subsurface survey services help avoid design clashes or interference with existing infrastructure, reducing the risk of utility strikes and their associated costs, delays, and reputational damage.
Harnessing technology for informed decision-making
Fortunately, advances in technology have allowed us to understand the unseen environment below street level. Various techniques now allow surveyors to provide detailed information about underground infrastructure with minimal disruption to the site. Key technologies include Underground Utility Surveys, Ground Penetrating Radar (GPR), CCTV Drainage Surveys and Building Information Modelling (BIM).
By leveraging these technologies, surveyors can supply developers with geospatial data, enabling informed decisions when planning, designing, and constructing projects that interact with subsurface infrastructure.
The advantages of subsurface surveys
- Risk reduction: Minimising the probability of utility strikes during construction, reducing costs, delays, and reputational damage.
- Cost savings: Reducing the need for exposing buried services prior to excavation. Read David Sayad’s piece, Avoiding cost and conflict by understanding the infrastructure beneath our feet in New Civil Engineer to find out more.
- Enhanced planning: Identifying important subsurface features and hazards for better project planning.
- Regulatory compliance: Ensuring projects meet safety and regulatory standards.
- Safety: Protecting construction workers and the public.
Investing in high-quality subsurface surveys early in the design process can provide a return on investment of 462% to 2,200%, highlighting their value in modern construction and development projects.
Case Study: Minerva House – Unveiling Mystery Utilities
At Minerva Ave in London, a developer faced the challenge of unidentified cables within a building basement. Specialist surveyors from Murphy Geospatial were tasked with solving this mystery. By gathering records from various asset owners and conducting a comprehensive utility survey, they identified the cables as belonging to British Telecoms (BT), despite inaccuracies in asset records. This crucial information allowed the developer to proceed confidently with their project, avoiding the costs and disruptions associated with further invasive exploratory work.
Ensure your project’s success by unveiling the hidden infrastructure beneath your feet with subsurface survey services from Murphy Geospatial.