Horizontal Directional Drilling

Directional boring is a cost-effective alternative to open excavation and an essential tool in today’s environmentally sensitive construction industry.

Hydro Excavation

Hydro excavating is the safest, most cost effective and environmentally friendly method of excavating in the industry today.

Plowing & Trenching

We handle all aspects of cable placement, from the largest cable laying projects to the smallest drops.

Traffic Control

Experience safety and peace of mind in your work zone with assistance from Four O Six Underground’s traffic control services.

Concrete & Asphalt

Four O Six Underground offer a wide range of services and options for small-scale concrete and asphalt repair and maintenance.

Montana's Turnkey Drilling Solution

At Four O Six, we provide quality commercial boring installation at competitive prices.

Four O Six Underground in Helena, Montana, is renowned for being a leader in today’s underground trenchless technologies. Trenchless technology allows our technicians to reach underground infrastructure without disrupting the flow of vehicular or foot traffic.

We provide boring and horizontal drilling services that utilize advanced trenchless technologies. In addition, trenchless drilling allows us to easily provide services to underground utilities, like water sewer, power, telecom, and fiber communications. Being on the cutting edge of drilling technologies, we specialize in telecommunications and directional drilling. We also provide services in small-scale asphalt and concrete work, traffic control, hydro excavating, and commercial landscaping clean up and restoration.


The best way to explain it is to show you. Here is a video that shows what we do.

In addition to Montana, we provide a variety of services to the areas of Wyoming, Colorado, Idaho, North Dakota, and New Mexico.

With over 15 years of experience, Four O Six Underground works hard to provide quality services in a timely manner. Our method is effective because we use innovative technology on every job. We take into consideration the specific needs every job requires. Not only is our goal to provide quality workmanship, but we also want to create lasting relationships with our customers.

Licensed and insured, we are ready to handle any job that comes our way. We are dedicated to safely and effectively completing every job. Customer satisfaction is always guaranteed because we go above your expectations each time. With Four O Six Underground, we provide free estimates for our customers upon completing an inspection of their proposed project. To obtain more information, call us today!

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