About Us

What We Do


We use state of the art horizontal directional drills and experienced drilling crews for commercial, residential and municipal underground utility pipe installation projects in Oklahoma. Horizontal Directional Drilling (HDD) is a steerable trenchless method of installing underground pipe, conduit, or cables with minimal impact to the surrounding surface area. This form of trenchless pipe drilling is often better for the environment and can save property owners’ time and money by reducing the disruption costs often associated with open cut landscape, concrete and asphalt trenching.

Working Together


A Tag Underground Works prides ourselves on safety, quality and our satisfied customers! Utility relocation and new installation for businesses, residences and subdivisions. We are experienced with fiber optic cabling and other utility lines. Additionally, we offer a variety of skilled services such as installing conduit for electric, gas, sewer, and water lines.

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Who We Are


A TAG Underground Works, LLC is a Woman-Owned, Veteran-Owned, HUB Zone, Small Business that is family owned and operated. Founded in 2015 by Grady & Arlene Ulm after faithfully serving the United States in both military and civil service for over 42 years. We are an underground construction company with over 20 years combined experience in the horizontal directional drilling industry. Our trained crew is outfitted with the most technologically advanced equipment available. We have friendly, knowledgeable office staff that is ready to assist in getting your project started!