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.

Get a free quote today!

Where is the job located?

(*) Zip Code

(*)How did you hear about us?

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

What is the locating in preparation for?

Contact Information

(*) First Name

(*) LastName


(*) Email

(*) Phone


What is the best way to reach you?


Other comments or project details?

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

Washington DC Utility Locating Projects that Penhall Worked On

Find underground water lines

Our branch in Washington, DC worked at a construction site to locate a water line running through it. Prior to the scanning the water line had been struck but not broken. Our analyst used the GSSI 400MHz Antenna and used the RD 7100 for sweeps to locate the water line. After locating the water line, the workers were able to safely dig around the water line with no further incidents.

Locate underground storage tanks with GPR

Our Washington, DC branch located any utilities surrounding the area surrounding gasoline storage tanks at a truck stop. The construction crew at the site were trenching around the storage tanks for a new concrete barrier. For this reason, they wanted to make sure nothing was struck. Using the RD7100 and the GSSI 400MHz Antenna, our analyst found multiple objects at the site. He found and marked irrigation, power, and sewer lines. He also found a miscellaneous line that could have been a fiber optic line.

Use private utility locating service to avoid hitting electric lines

Recently, a local plumbing company hired Penhall Technologies to locate an electric line that was struck during digging operations. The client didn’t scan the area initially, so the contractor needed to know where the line entered the building and where to shut it off. The total area of the utility scan was 30’x110’. Within that area, the analyst found (12) electric lines and (1) water line. The analysts used the Sir 3000 with a 400 MHz antenna to scan the areas and followed up by performing sweeps with our electromagnetic detection device (RD 8000), which will pick up any live power or communication lines.

Penhall Technologies reveals man holes that were previously unknown to help customer find out issues regarding their water supply

utility locating to mark out water lines and detect man holesLast week, Penhall Technologies had a utility locating job in Washington, D.C. at the National Mall. The water supply to one of the concession stands on the Mall was turned off or blocked. The client had hired numerous companies to come out and investigate, but they could still not figure out what was causing this. The analysts’ job, was to locate the water line and map out the different directions it was heading. The client wanted to know the direction of the blockage, to know where to inspect for damage. Using spray paint, the analysts accurately marked out the water line in numerous directions. We verified our results because the lines led to numerous manholes with water line markings. These client had no previous knowledge of the manholes.

Scan ground to help locate where a potential leak might be

gpr scanning to locate private utilities Recently, a homeowner in Washington, D.C. called Penhall Technologies for private utility locating services. The client called mainly because he suspected a potential water leak, but he did not know where it was. In this case, it was crucial to locate the water pipe and the potential leak for the plumber contracted to complete his job successfully. Our analysts surveyed the suspected areas and helped identify where the potential leak existed so the plumber could focus the repair efforts accordingly.