Horizontal Directional Drilling


Horizontal Directional Drilling (HDD) or Horizontal boring as it sometimes known, provides a safe and cost effective solution for the installation of pipes, ducts and cables where conventional open cut methods are not permitted, practical or viable. Horizontal Directional Drilling (HDD) causes no disruption to roads or rail, does not scar the landscape and works from the surface, meaning this trenchless method is suitable for environmentally sensitive areas.

This prevents the need for costly and inefficient trenching methods which are harmful to the environment and create massive amounts of waste materials. As with most trenching operations the impact on local surroundings can be massive and extremely unpleasing whilst also bringing very high installation costs. It will reduce those costs enabling total project costs to be more feasible.

With this method, we can install pipelines of almost any material, with diameters ranging from 25mmØ – 1,200mmØ in distances from 15m – 1,500m installed in one single operation. We own and operate the most technologically-advanced directional drilling equipment, with pullback forces ranging from 14te up to 300te, and with over 40 years of experience are able to complete small, medium and major pipeline projects throughout the UK and Ireland.

Advantages of Horizontal Directional Drilling

  • No environmental disruption as surfaces are not broken up or damaged to any great extent
  • Minimal traffic disruption
  • Approved methods for pipe laying from 25mm to over 1200mm diameter over 1.5km.
  • Fast turnaround.
  • Full UK and Ireland coverage.
  • Very economic for river crossings, railway crossings, highway crossing and roundabouts.

Low cost of surface reinstatement and risk compared to open cut methods.    



  • Water
  • Gas
  • Electric Supply
  • Telecommunications
  • Rising Mains
  • Gravity Mains

To see an example of our HDD Drilling rig in action, please click the link below



To find out more about our Horizontal Directional Drilling services, or any of our trenchless technology, fill in the form below.

Directional Drilling image gallery...


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Allen Watson Limited

Offices at:
- Horsham, West Sussex
- Harlow, Essex
- Barnsley, South Yorkshire

01403 790772

Case Studies

Wessex Water Engineers site visit
Allen Watson Limited latest project was visited by Wessex Water Engineers to witness the installation of DN225 Naylor Denlok VC pipes by guided Auger boring

Press release - Allen Watson Acquisition
Trenchless contracting services added to The Cappagh Group's technical capabilities following Allen Watson Limited acquisition.

Drive Shaft under construction
Allen Watson Limited are currently on a Southern Water project titled Ebbsfleet green, Swanscombe subcontract works which requires the installation of pipelines.

Social Media

Allen Watson complete another deep pipe installation for a prestigious housing development on the banks of the rive… https://t.co/54WUphtQUe

AWL continue to invest in new equipment with the delivery of the first of four new vans complete with full livery.… https://t.co/wYU8AEy4rh


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