THG Geophysics One-Call Service
The “811” system, commonly known as “Call-before-you-dig” or “One-Call”, was established in […]
Electrical Imaging of Historic Subsurface Coal Mining
A proposed gas fired power generating plant is being constructed over an […]
Electromagnetic Mapping Methods for Landfill Seeps
During a new landfill construction, an existing valley needed to be cut […]
Bedrock Study Using Resistivity Imaging
THG geophysics was contracted to perform a geophysical investigation to characterize bedrock […]
Sinkhole Delineation
Conventional geotechnical investigation techniques like test pits and borings can sometimes impose […]
Void Investigation for Pipeline Construction
THG Geophysics was asked to investigate an open hole that was exposed […]
Utility Mapping for New Gas Well Pads
As part of the development process for oil and gas well sites […]
Electrical Imaging of Mine Subsidence
Subsurface coal mining underlies many regions of southwestern Pennsylvania. The remnant subsurface […]
GF Instruments NEW LG-1 Galileo Land Gravity Meter
GF Instruments has just […]
Underground Storage Tank UST Investigation
One of the most useful applications of geophysical survey techniques is the […]