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?

(*) City

(*) State

(*) Zip Code

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?

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

1. 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 Maryland colleagues were given an address for a utility locating job in Washington, D.C. When the team arrived at the address, the client instructed them to drive up and park on the National Mall. The client explained that recently the water supply to one of the concession stands on the Mall was turned off or blocked. They had hired numerous companies to come out and investigate, but they could still not figure out what was causing the water to be shut off or blocked. The analysts’ job, was to locate the water line and map out the different directions it was heading. The purpose of this was so that the client knew the direction of the possible blockage or so that they knew where to dig up the line to inspect for damage. The section of the mall the team was asked to map out was about the size of a football field. The SIR 4000 with a 400MHz antenna was used to scan this area. Using spray paint, the analysts accurately marked out the water line in numerous directions and were able to verify our results because the lines led to numerous manholes with water line markings. These manholes were not previously known to the clients. Penhall Technologies of the Washington, D.C. area has the capability and the man power to meet your needs in a timely manner, ultimately ensuring your projects get finished safely and on time.

2. Ground penetrating radar used to locate buried plumbing lines before remodeling

GPR use to scan floor to locate utilities and conduitPenhall was asked to perform GPR scanning to locate buried plumbing lines on the first floor of a large theater complex in Silver Springs, MD before remodeling could begin. We were able to locate the pipes to help the customer avoid damaging them during construction.

3. Locate all underground utilities before undergoing tree removal

locate underground utilties before undergoing tree removalA homeowner in Port Deposit, MD needed to find water and power lines in one acre of land before they could remove some trees. All detected subsurface utilities were marked to avoid damage during excavation of the trees.

4. Survey ground to help identify where a potential leak might be

gpr scanning to locate private utilities A homeowner in Washington, D.C. called Penhall Technologies because he suspected a potential water leak but he did not know where it was. We surveyed the suspected areas and helped identify where the potential leak existed so the plumber could focus the repair efforts accordingly.

5. Identify vital utility lines before remodeling to ensure safety during construction

locate utilities before undergoing remodeling to commercial propertyA customer in Bethesda, MD called us to locate and mark their utility lines for them before they decided to do any type of remodeling to the commercial property they just purchased.  Our experts used GPR, ground penetrating radar, to locate all lines (water, gas, and power), and they are now well on their way to remodeling their office in a safe, and timely manner.