HGI paper to appear in Vadose Zone Journal – 3/09
The paper is titled “A coupled electrical resistivity-infiltration model for wetting front evaluation" by D. F. Rucker. The work describes time series measurements of electrical voltage to estimate the velocity of an infiltrating wetting front from the surface.  Simplifying assumptions include a Green-Ampt soil and a two layer electrical resistivity model. If cumulative volume of infiltrating water is known, an estimate of the wet hydraulic conductivity can be made.

HGI initiates large-scale geophysical survey of a tank farm at Hanford - 2/09
On Feb 9, 2009, HGI initiated a surface geophysical exploration project of subsurface contamination at the SX Tank Farm Complex at the Hanford Site in south-central Washington. The results of this survey, which includes 40 acres of EM/MAG characterization and 10 line kilometers of resistivity data acquisition in and around the tank farm, will assist the Site in refining its current understanding of contaminant plumes from past tank leaks that were determined from an initial well-to-well resistivity survey conducted by HGI within the tank farm in 2008.

HGI begins joint work with Arizona Parks & Recreation to survey earthen dam at Patagonia Lake – 2/09
On Feb 17, 2009 hydroGEOPHYSICS (HGI) started a multi-year geophysical study of the Patagonia Lake and Earthen Dam complex. The project is a collaborative effort between HGI and the Arizona Parks & Recreation Department to characterize dynamic seepage changes using HGI’s High Resolution Resistivity method. In addition, a lake based resistivity and bathymetry survey will be completed to evaluate reduced storage capacity due to increased sedimentation.

HGI completes waterborne survey of expanded Panama Canal – 2/09
On Feb 26, 2009 hydroGEOPHYSICS will present results to the Panama Canal Authority for a 773 line kilometer water-borne resistivity survey which was completed in December of 2008.

HGI deploys 320 channel system to provide real time monitoring of heap leach injections – 9/08
hydroGEOPHYSICS successfully deployed its newest resistivity data acquisition system at Newmont’s Gold Quarry facility to provide real time (2D, 3D & 4D) monitoring of leaching solution injections on gold heaps for the purpose of guiding the injection process in multiple wells to enhance recovery rates.

HGI repeats appearance in the Inc5000 – 8/08
hydroGEOPHYSICS is pleased to announce that we were selected to the 2008 Inc5000 and ranked #1481 on the list of the fastest growing privately held companies in the U.S. Additionally HGI was ranked #21 on the Top 50 Engineering Companies sub-list.