Laserfiche WebLink
FUGRO CONSULTANTS, INC. <br />4_ <br />39.13733, -108.31436 <br />Palisade, CO <br />Figure 1: General Location Map <br />Fugro Consultants Inc., (FCL) performed the geophysical surveys for Huddleston -Berry Engineering & Testing <br />LLC. The field data were collected between April 6th and 9th, 2016 by Sr. Geophysicist Jim Pfeiffer and Sr. Staff <br />Geophysicist Lincoln Steele. <br />Data Acquisition <br />The objective of the geophysical investigation was to use electrical resistivity to map potential groundwater <br />pathways draining into the abandoned mine working of the Snowcap coal mine. FCL deployed the AGI R8 <br />SuperSting resistivity system over seven North-South survey alignments on site. The R8 system is an 8 channel, <br />84 electrode systems capable of measuring a variety of resistivity arrays during each survey. The lines ranged in <br />length between 249 meters (full 84 electrode array) and 231 meters (78 electrode array), depending on <br />steepness of terrain and other physical obstructions (berms, piles, etc.). A composite resistivity survey including <br />both Dipole/Dipole and the Schlumberger method were used to best image the subsurface along each profile. <br />The survey lines were adjusted to best evaluate potential subsurface anomalies and pathways in the area of <br />concern, located near several known surface features from the mine. The first line collected was in a <br />background area located west of the mine workings to gather baseline information about the site. Figure 2 <br />shows the survey area with each of the ERT profiles labelled, noted surface features, the buried water line and <br />the boundaries of the imaged ERT anomaly. <br />Project/Proposal No. 04.79160011 25 April, 2016 <br />Page 2 of 6 <br />TR -69 A14-14-7 09/16 <br />