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SECTION I - GEOLOGY <br />Mining History <br />Mining operations were conducted on this property by <br />Herron and Strong from about 1958 to 1962. During this <br />period of time this sand and gravel deposit was selected to <br />provide gravel for the U. S. Government Missle Bases in <br />Southeast Wyoming and Eastern Colorado. Prior to 1958 <br />"Garner Sand and Gravel Company and Carl Broughton mined <br />material from the West side of the property. <br />Evaluation Procedures <br />During 1961 the geologic consulting firm of Doeringsfeld, <br />Amuedo and Ivey conducted a photogeologic and field evaluation <br />of sand and gravel deposits in east-central Colorado. The <br />area covered included approximately 3600 square miles lying <br />adjacent to and east of the Front Range of Colorado. The <br />southern boundary of the project area was near the point <br />where the South Platte River flows out of the Front Range. <br />The northern limit of the investigation was the confluence <br />of the Cache La Poudre and the South Platte Rivers. <br />During this investigation, data on the location, stratigraphic <br />distribution, areal extent, and continuity of sand and <br />gravel deposits were ascertained and the best area was <br />designated for detailed investigation. The area designated <br />for detailed investigation was the Lower Cache La Poudre <br />River Basin East of Greeley. <br />During the investigation it was found.that the gravels <br />in the Lower Cache La Poudre Basin meet the highest specifications <br />required for any aggregate period. The pebbles are 90-95% <br />quartz or quartzite and have been well sorted by stream <br />action. These gravels do not extent any further east from <br />the center of Greeley than 3 miles; and, further eastward <br />the gravels are supplanted by South Platte River Sands. <br />Many thin deposits in the Greeley area have been explored <br />but the remaining thick deposits are within the property for <br />which a Special Permit is now requested. <br />In 1973 A. A. Engineers and Associates of Denver, <br />Colorado were retained by Mr. Robert K. Jensen to further , <br />evaluate the property, utilizing a Becker Drill. The results <br />of their investigation are herewith submitted on the following <br />pages. <br />-12-