Third Party Approvals

Securing third-party approvals can be one of the most challenging and time-critical aspects of trenchless construction. HB Tunnelling provides specialist design and engineering support to manage these processes efficiently, helping to avoid delays and keep infrastructure projects on track.

Streamlining Third-Party Assurance Processes

At HB Tunnelling, we understand that maintaining the construction programme is critical to the delivery of a successful project.  However, 3rd party approvals or technical assurance processes for trenchless construction projects can often delay the programme or hold up the completion of a project.  

Our Design & Engineering team have extensive experience delivering trenchless crossings beneath railways, highways, rivers and critical infrastructure assets. They work with various 3rd party stakeholders and certification bodies, including Network Rail and National Highways. As such, we understand the process requirements in order to gain swift approval of crossing projects from the early stages of construction. From environmental impact assessment to construction methodology, we’ll help you ensure compliance at every stage.

Typical Approvals Managed

  • Network Rail Form A/B 
  • National Highways CD622
  • Canal & River Trust 
  • Environment Agency 
  • Local Authorities 

HB Tunnelling can undertake 3rd party approvals for:

Network Rail

Provide CRE-D, CRE-C, CRE-T and CEM roles, supporting Form A and B submissions to NR/L2/CIV/044, plus monitoring plans, dilapidation surveys and geotechnical reports.

National Highways

Provide DGA role and deliver SOI, PSS, GI and GDR to CD622, plus structural assessments to CG300 for crossings or works affecting National Highways assets.

Canal and River Trust

Ground investigation, geotechnical assessment and trenchless construction design to CRT Codes of Practice

Other Asset Owners

Experience delivering geotechnical and structural assessments to meet technical assurance requirements for utilities, transport bodies, and major asset owners across the UK and Ireland.

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Case Studies

Design in Action: View Our Project Outcomes

Our design solutions are proven in the field. Review case studies where early engagement and expert design saved time, reduced cost, and ensured seamless constructability for complex infrastructure.

Bessacarr – Caisson Shafts & Augerbore

HBT undertook the design & build of the foul & storm pump stations & manholes to adoptable standards in accordance with Yorkshire Water requirements.

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A63 Hull – Augerboring

HB Tunnelling supported Balfour Beatty by installing a drainage pipe from the new underpass at the modified Mytongate Junction, linking it to the pump station shaft.

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Appleby Lodge – Guided Auger Boring

HB Tunnelling was approached by United Living Energy Ltd (ULEL) to help resolve a potential service clash during the installation of the Appleby Lodge Gas Pipeline.

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Enquire About ECI & Consultancy Works

Ready to leverage the ECI advantage? Reach out to our certified CRE/CEM specialists to discuss your project’s early design, risk mitigation strategy, and cost optimisation. Use the form below to initiate an immediate, certified consultation.

Email Us Direct: enquiries@hbtunnelling.co.uk

Call us on: 0845 388 3325