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GEOLOGIC DATA FOR COLLOM CROSS SECTIONS <br /> This volume presents drill hole information used to prepare the cross-sections located on Map <br /> 11 B of the Collom Permit Revision. The cross-sections are shown on Figure 2.04.6-5 (3 <br /> sheets) of the permit revision. <br /> INTRODUCTION <br /> The drill hole data base used to prepare the computer generated cross sections contains <br /> lithologic and other data collected from the holes drilled in the Collom area from the late <br /> 1960's through 2006. The drill data can be separated into two separate categories—pre-2004 <br /> and 2004 through 2006. <br /> The pre-2004 Collom data was obtained from drill hole files drilled from the late 1960's <br /> through 1996 in the Collom area. This data was obtained from a review of all Colowyo drill <br /> data, which occurred in the late 1990's, to aid in a coal seam correlation project to determine <br /> subsurface conditions for the Colowyo property. The work involved obtaining coal depth, <br /> thickness, hole location and collar elevation for all holes in the Colowyo drill hole files at that <br /> time. No lithologic data was collected since many of the holes only had geophysical logs. All <br /> this data was input to a computer data base. Therefore, all lithogic printouts obtained from <br /> this time period contain only identified coal seams (e.g., Al, D2, F6), with the other material <br /> defined as 'undifferentiated stone'. Some of the lithologies also identify some of the thicker <br /> sandstones as 'sandstone'. <br /> The 2004 to 2006 drill hole work input all data from the drill holes. Thus the following <br /> information contains lithologic data from ground surface to total depth. This data along with <br /> geophysical data is presented on strip logs for all Collom drill holes. <br /> DRILL HOLE FILES <br /> The following files are separated by cross-section identifiers, e.g., Cross-section A-A'. The <br /> beginning of each section has a list of those holes included in that section. Each drill hole has <br /> at least the lithologic log present. <br /> If available, the hole completion report is presented first. This is followed by the computer <br /> generated lithologic data printout. If the lithologic printout does not have complete lithology, <br /> and the drill hole file had a lithology description, this was included as part of the drill hole <br /> data. For all 2004 to 2006 drill holes, only the printout of all the lithology was included. <br /> (The hand written notes were not included). A strip log was included that shows lithology <br /> and geophysical logs (caliper, gamma, density, and resitivity). <br /> All lithologic printouts have the pilot hole location, if more than one drill/core hole was <br /> drilled at the location. This is also the case for the drill hole completion report. <br /> The lithology summaries contain adjusted depths, seam, thickness, lithologic qualifiers, <br /> lithology type, shade, and color. The adjusted depth is the depth as shown on the geophysical <br /> log, not the drilling or core depth. For the column under seam, if there a letter and possibly a <br /> number (e.g., E2), that identifies the coal seam. If it has an `S' in front of the letter, this <br />