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

Other Service

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

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

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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?

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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!

Honolulu Utility Locating Projects that Penhall Worked On

Keep your project safe with concrete scanning and utility locating

utility locate in Honolulu Our analysts performed concrete scanning and utility locating before a dry-stand pipe relocation/excavation on grade took place. The contractor did not want to hit any power, irrigation, or gas lines present in their proposed layout. Using the RD7000, the analyst traced irrigation, power lines and a single gas line. These were within range of the contractor’s proposed trench location. After using the RD locator, the analyst used the SIR 4000 3-wheel cart to verify once again, the utility markings and explore any other hazards present in the soil. After reviewing the marked areas with the data collected, the contractor was happy with the report and utilized our services again the same day at another jobsite.

Penhall helps to locate any hazards, mainly a 480 power line, before demolition of an old conveyor belt for H-Power

utility locating hawaiiPenhall Technologies received a request for GPR scanning and utility locating a concrete slab on grade at Covanta, locally known here in Hawaii as H-Power (Honolulu Program of Waste Energy Recovery). The contractor’s purpose in having us scan and perform the utility locate of the 54’x51’ area was to enable him to proceed with a demolition of an old conveyor belt system to make way for a brand new one. The job required two GPR Analysts, two RD7000’s and one three wheel cart. There were numerous conduits and pipes throughout the requested scan area. The contractor’s main concern was to identify the main 480 power in which he requested green paint to be sprayed. We carefully examined the data and informed the contractor of our results and he became a happy Customer from beginning to end. Our Hawaii field office will ensure that you have the right data and tools for any task presented to our Team.


Ground penetrating radar used to locate underground utilities and other hidden obstruction

Locate underground utilities and hidden obstructionsAt a location in Makakilo, HI, a customer needed to locate underground utilities along with any hidden obstructions.  The area to scan was approximately 300 x 100 yards. Our analyst used ground penetrating radar to locate electrical lines, fiber optic lines, and other utilities successfully.

Ensure construction safety by locating utilities first

Locate buried sewer pipesFor a commercial property in Kailua, a general contracting company hired Penhall Technologies to scan for underground utilities.  Our analyst scanned a small area of 14′ x 10′ to locate and mark all utilities so that it was safe for the general contractor to move forward with their project.