Utility & Pipe Locating using GPR in Seattle, WA

Call Us Today!(206) 962-3272

11001 East Marginal Way South, Tukwila, WA 98168

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Your experienced utility locator

Penhall Technologies Scanning Analyst Mariah


  • BS in Geology from Western Washington University (2010)
  • MS in Archaeological Prospection Shallow Geophysics from University of Bradford, Bradford, England (2014)
  • 2 ½ years of work experience in gold, silver and antimony exploration/mining in Idaho
  • OSHA 10 Certified
  • Experience with multiple 3D modeling software packages (Surfer, GemCom, Voxler, Leap Frog, ArcGIS, etc)
  • Enjoy kayaking, SUP boarding, camping, and hiking in the summer, and a good book or show in the winter

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Determine where water leak may be through gpr scanning

determine where water leak may be through gpr scanningA customer in western Washington needed help identifying a potential leak in water lines at their private residence.We were able to locate and mark the lines and narrowed down an area that appeared to be where the leak existed. They were able to avoid added expense of digging through their entire asphalt driveway and concrete garage floor.

Identify the location of utilities before undergoing construction

locate water line on private propertyIn Enumclaw, WA, a customer asked Penhall to locate a PVC pipe that was serving his house and barn from a well pump house.  He was planned to extend a pole building and needed to know the location of the pipe before construction could begin to avoid any costly damage.

Before undergoing excavation, ensure safety by locating utilities

Identify subsurface hazards before excavationAt an EPA Superfund site in Tumwater, WA, Penhall was asked to locate and mark utilities in an area where intrusive or excavation work was planned.

Locate utility conflicts in subgrade surface prior to installing ground rods

Locate utility conflicts in subgrade surface prior to installing ground rodsIn Quincy, WA, we performed a utility survey to locate utility conflicts in subgrade surface prior to installation of ground rods.  Our GPR Analyst scanned six 5’x5′ areas to locate and mark the lines in order for the rods to be placed in locations that were free from hazards.