What Is HDD?

To dig or not to dig? 
When that is the question, Directional boring, also called horizontal directional drilling or HDD, is a method of installing underground pipes and conduits along a horizontally drilled bore path, with minimal impact to the surface and surrounding area. Pipe lengths installed via HDD range in footage from 30 up to thousands.  Diameters up to 48" have been installed in shorter runs.
Why use directional boring?
The process is used for installing telecommunications & power cable conduits, water lines, sewer lines, gas lines, oil lines, product pipelines and environmental remediation casings. It is used for crossing waterways, roadways, shore approaches, congested areas, environmentally sensitive areas and any area where other methods are more expensive.
When will it be more economical for you to use HDD?
It reduces cost under many different applications: On job sites there are less interruptions to other machinery (forklifts, trucks, etc.), no trenches or pot holes in the way slowing down other building production. On deeper installations, there is no digging, no shoring, and no back filling or compacting. No need to dig up roadways or trees; just bore under. In tight areas, where digging equipment may be too large to fit, HDD is a great alternative.

HDD is used instead of trenching or excavating for many reasons:

  • Less traffic disruption
  • Lower cost
  • Obstructions above ground
  • Deeper installations
  • Longer installations
  • No access pit required
  • Shorter completion times
  • Directional capabilities
  • Job site cleanlines
  • Job site safety
  • Safer for the environment