FAQ about Horizontal Directional Drilling

At Morris Infrastructure Group we work closely with our clients to complete seamless Horizontal Directional Drilling projects.

What is Horizontal Directional Drilling (HDD)?

Horizontal Directional Drilling (HDD) is a steerable trenchless technology method of installing utilities underground where it is not practical to excavate.


  • What is horizontal directional drilling typically used for?

HDD is commonly used to install pipes, conduit or cables.

  • When should I consider using HDD?

When in environmentally sensitive areas or in areas where damage to the ground or root structures is to be avoided.

When open excavation is not possible due to roads, footpaths, and/or waterways.

  • What preparation is required prior to drilling?

Locating of existing underground assets (DBYD, excavation permits) in some cases permits by asset owners or land owners.

  • How much space is required for the entry and exit pits?

A minimum of 1m x 1m space is required for entry exits holes. Rig requires 1.8m x 4m to park.

  • Is there a maximum drill diameter?

Our drill can drill up to 200mm pipe.

  • Do I require approval from my local council?

Yes, all local shires require notifications when HDD activities take place.

Five reasons why I should choose Horizontal Directional Drilling?

  1. Durability: The piping used in HDD projects are built to last.
  2. Quicker installation processes with less impact and disruption to the surrounding landscape.
  3. Reduced installation costs: As it only requires a small crew to carry out a HDD project
  4. Negligible soil contamination: Pipes installed are made to last therefore are impenetrable.

At Morris Infrastructure Group we pride ourselves on providing a cost-effective, timely and reliable service.