Based in Arizona, The HDD Company is a leading supplier of Horizontal Directional Drilling (HDD) services for the installation, replacement and rehabilitation of pipeline and utilities at vital crossings. We are known for our expertise in marine applications.



Serving the USA from our headquarters in Casa Grande, Arizona The HDD Company has a proven track record for completing a wide array of horizontal directional drilling projects both as a sub-contractor and as a prime contractor. We own and operate an integrated fleet of heavy and light HDD rigs and tunneling equipment. The HDD Company is a trusted provider of horizontal directional drilling services for major utility and communication network installations, as well as oil and gas projects. We are regarded as leader in the specialized field of marine construction.

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3117 N Cessna Ave
Casa Grande, AZ 85122
MAIN 530 676 5705

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The HDD Company is helping to lay the infrastructure that propels our communities forward. We have completed thousands of traditional horizontal directional drilling projects involving utilities and pipelines across the western United States, demonstrating a talent for problem solving in the face of any challenge.

With our proximity to the west coast, the HDD Company excels at shore approaches, harbor and marine work. Our San Francisco Bay utility installation is considered one of the most complex projects ever completed using horizontal directional drilling. In recent years, our HDD services have been used to install subsea intakes for desalination plants. In fact, HDD installations have become the preferred methodology for these installations due to the reduced impact on the marine environment.

  • Installations ranging in diameter from 51 mm to 1,524 mm (2 in to 60 in).
  • Ability to drill continuous lengths up to 2743 m (9,000 ft).

Light HDD Rigs | Light HDD rigs provide an economical trenchless solution over shorter distances. They require a smaller drill pad, so you can set up in confined spaces.

Heavy HDD Rigs | Heavy HDD Rigs can install product lines spanning distances up to 3 km (1.86 miles). Need to safely cross a highway and a water body in one shot? We can do that.



The HDD Company is part of the Crossing Group which offers a range of trenchless services. Visit our services page for detailed descriptions of our HDD methodologies.

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Tunnel Boring and Pipe Jacking Systems are used to hydraulically install underground pipelines up to 4.2 m (168 in) in OD range within strict alignment and grade tolerances. The likelihood of settling or sloughing is very low. Wheel machines are equipped with various cutter heads and sand shelves. A closed-face attachment is available for boring in unstable ground conditions. This versatile system can be easily adapted to work with any jacking pipe, in any pipe joint length. It can accommodate a wide range of pipe diameters.

Tunnel Boring Machines are used to excavate tunnels with a circular cross section through a variety of soil and rock strata. They can bore through hard rock, sand, and almost anything in between. Tunnel diameters can range from 1 m and exceed 15 m (3 ft to 49 ft).

The Crossing Group - The Tunneling Company - Tunnel Boring - Pipe Jacking - Trenchless Construction - Tunneling - Augering, Boring & Pipe Ramming


A boring technique commonly used for installing oil & gas pipelines ranging from 51 mm to 1067 mm (2 in to 42 in) in diameter without leaving casing in the ground. Product pipe is welded to steel casings and either pushed or pulled through the ground in sections. The casing is cut off and removed, leaving just the product pipe. Maximum installation length is 150 m (492 ft).

The Crossing Group - The Tunneling Company - Slip Boring - Trenchless Construction - Tunneling - Augering, Boring & Pipe Ramming


A pneumatic hammer is attached to the inside edge of the casing. The front of the DTH breaks cobles, boulders and even solid rock into small pebbles or dust. The spoil makes its way through the hammer and into the casing, where it is removed by airway augers.

The Crossing Group - The Tunneling Company - Down The Hole Hammer - DTH - Trenchless Construction - Tunneling - Augering, Boring & Pipe Ramming


A Guided Boring Machine (GBM) is used to install 305 mm to 3.6 m diameter pipe (12 in to 144 in) with grade and alignment precision. It is commonly used for installations 50 m to 150 m in length (164 ft to 492 ft) or when line and grade accuracy is critical in displaceable soil. Our GBM is extremely versatile and our customers continually approach us with new applications.

The pipe installation involves a two-step process where launch and reception shafts are strategically located to minimize surface disruption. A pilot tube with a theodolite guidance system is then pushed through the ground at the precise grade and alignment specified in the design into the reception shaft. A reaming head is welded to the pilot tube and the casing and the pilot tube is used as a guide to install casing. The GBM can be used in conjunction with auger boring or pipe ramming methodologies.

The Crossing Group - The Tunneling Company - Guided Boring - Trenchless Construction - Tunneling - Augering, Boring & Pipe Ramming


Pipe Ramming is used in a wide variety of soil types including gravel, cobble or sand. A pneumatic hammer is attached to the back of the casing pipe and driven through the material at any angle: from horizontal to vertical. The material is cleaned out of the pipe using an auger boring machine. Pipe Ramming methods are used for pipe diameters of 305 mm to 3.6 m (12 in to 144 in).

The Crossing Group - The Tunneling Company - Pneumatic Pipe Ramming - Tunneling - Augering, Boring & Pipe Ramming