Commitment to Safety • Reliable Results
Responsive Resources • Established Expertise

Penhall Technologies provides utility locating, employing both electromagnetic induction (EMI) and ground penetrating radar (GPR) for privately owned property. We can identify and locate subsurface hazards and obstructions existing in the ground. Reduce the risk and help ensure the safety of your next project by contacting Penhall Technologies for your private utility locating needs.

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What services can we assist you with?

I can confirm this is a private locate. For all public locates please contact 811.

Other Service

To better help you with your request, could you kindly provide the following information:

What are we scanning? Slab on grade, suspended slab, etc.

What are we scanning for? Ex. rebar, tension cables, conduits, etc.

What is the size of the area(s) that need to be scanned? How many areas?

What is the thickness of the slab?

What is the scanning in preparation for?

To better help you with your request, could you kindly provide the following information:

What is the surface that we are performing the locate on? Ex. Ground/Dirt, asphalt, concrete, indoor/outdoor, etc.

What is the size of the area that needs to be scanned in square feet or linear feet?

How many scan locations?

What are we locating? Water, gas, electrical, sewer, etc.

How many utilities are running through the proposed scan area?

Do we have access to meters or utility boxes?

What is the locating in preparation for?

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Once you submit this form, a Penhall Company representative will contact you within 24 hours. Thank you for the opportunity to earn your business!


San Antonio Utility Locating Projects that Penhall Worked On

Avoid hitting power lines by scanning first

Penhall Technologies was hired to do GPR concrete scanning in a medical office building before a trench could be cut. The contractor wanted to locate utilities in and under the concrete to avoid hitting the main power to office buildings. Our analysts scanned 250 feet of trench using the GSSI HR Mini to confirm that no conduit was located in the concrete. The analysts then used a radio detection unit (RD7100) to locate live power under the concrete slab. Penhall Technologies was able to successfully locate the main power in the building.

Locate utilities before installation

Penhall Technologies was hired to locate multiple grounding wires surrounding a cellular tower before a new sewer line was installed. The analysts located the grounding wires by using the radio detection unit (RD7100) and inducing a signal on all wires to locate the grounding loop as well as the radial wires. It was originally thought that there were only 2 radial wires in the path of the sewer line. Penhall Technologies located four radial wires in the path and discovered that the grounding loop was too close to the existing sewer line.

Ground penetrating radar used to locate utilities in concrete slab before cutting and core drilling

Locate buried utilities under concrete slabAt a university campus in San Antonio, Penhall performed a GPR utility survey to locate buried cables, wires, and structural steel elements before before cutting and coring. We were located and marked all subsurface targets and provided a written field report.

Locate water and gas lines to avoid damage of utilities before cutting to relocate heavy gym equipment

Locate utilities in concrete slab under carpetIn preparation for equipment relocation for a gym at a San Antonio apartment complex, Penhall Technologies scanned to locate and mark water and gas lines.  Our GPR analyst was able to help the customer avoid damaging utilities in the four areas where the equipment were to be relocated.