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!


Maui Utility Locating Projects that Penhall Worked On

Ground Penetrating Radar used to detect voids due to erosion from tidal surf going under seawalls of a condominium property

GPR detects voids caused by erosion from tidal surf in hawaiiRecently, a contractor contacted Penhall Technologies with a unique request. This customer was working on a soil erosion issue along the coast on the island of Maui and wanted to know if we could detect voids in the soil below the surface due to erosion/washout from the tidal surf going under the seawalls. After informing the customer that our equipment is primarily used to locate underground utilities, GPR Analyst Joe suggested that depending on soil conditions he may also detect voids. This was an acceptable alternative to digging up 120’ of beachfront property to investigate. The analyst suggested that the locate be performed during low tide which would allow the voids to be clear of seawater and present an open “pocket” of air.

Using the GSSI SIR 4000 and the 400MHz antenna mounted to a 3-wheel cart, the analyst made several passes over the known sinkholes to further identify what they may look like. The scanned areas were then marked out using pink flags. Within a couple days the customer proceeded to excavate the areas that had been highlighted as problem areas and confirmed that the marked areas were consistent with areas they found to have voids, or washout.

Penhall Technologies of Hawaii has the capability and the man power to meet your needs in a timely manner as well as the expertise to think outside the box to provide solutions to the most challenging situations, ultimately ensuring your projects get finished safely and on time.

Radio Detection used to locate utility within restrooms of large hotel

locate utlities using radiodetectionA large contracting company hire requested a utility scan in six restrooms in a large hotel in Maui.  The company was performing a renovation and needed to reroute plumbing. Our analyst was able to locate and mark each restroom using RD technology making it safe for the construction company to move forward with the project in a time efficient manner.