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SUMMARY ANO CONCLUSIONS <br />No engineering geologic conditions were observed on the site, or are <br />anticipated, which would preclude development of an aggregate quarry. Findings <br />include: <br />1. The bedrock on the site 9s composed of compositionally layered metamor- <br />phic rocks of the Idaho Springs Formation. Interlayered biotite gneisses, <br />biotite schists, amphibn)ites and granitic gneisses occur. " <br />2. Metamorphic laminae are well developed and are parallel with a less <br />well developed foliation. Both .features dip moderately steeply to the <br />east or back into the hillside. <br />3. The rocks do not exhibit any prominent jointing or faulting. <br />4. Favorable attitudes of planar features in the rock, combined with the <br />absence of well developed fracturing, indicate a good cut slope stability <br />for the proposed 1/2 to 1 slope ratio. <br />LOCATION AND TOPOGRAPHY <br />The subject property consists of approximately 10 acres of land in the <br />SW 1/4 of Section 32> Township 6 South, Range 71 West, near Shaffers Crossing, <br />Jefferson County, Colorado. The site slopes down to the west at a ratio of <br />about 2.5 to 1 and is bounded by U.S. Highway 285 to the north and Elk Creek <br />to the west. Elevations on the property range from 8,120 Feet at the extreme <br />eastern edge to 7,920 feet at the extreme western edge of the site. The slope <br />is fairly uniform from east to west except toward the western third of the <br />property where grading has Teveled off a good portion of land (approximately <br />2 acres) at an elevation of 7,945 feet, Upslope from the graded area moderately <br />dense coniferous vegetation covers the hillside, <br />-1- <br />JC 00780 <br />PetersonlElk Creek <br />