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<br />t westerly and then northward. It is estimated that <br /> Phase I will take about 11 years to extract <br />' approximately 4.5 million tons of s end, gravel, <br /> end overburden. - <br />' Phase II will also begin with dewetering trenches <br /> around the perimeter of the mining area. The ground- <br />' d i <br />t <br />k <br />ill b <br />th <br />l <br />t formed <br /> e pumpe <br />o <br />wa <br />er w <br />n <br />e <br />a <br />e area <br /> during Phase I mining. Excavation will progress <br /> from the north to the south. It is estimated that <br />' Phase II will take about four years to extract <br /> approximately 1.6 million tons of material. <br />' <br />GEOLOGY Sub-surface soil investigations were conducted <br />' on this site. The investigations included boring <br /> and logging et several locations across the site <br />' utilizing a four-inch diameter continuous flight <br /> auger drill. <br />' In general, the site is overlain by one foot <br /> of silty topsoil, then a layer of sandy silty topsoil, <br /> in thickness <br />f <br />a <br />ilt <br />cla <br />var <br />in <br />th <br />l <br />d <br /> s <br />n <br />y <br />y <br />y <br />g <br />en a <br />ayer o <br />y s <br />' from two feet to 16 feet. Below this layer is <br />i <br />l <br />d <br />bbl <br />l <br />h <br />h <br /> var <br />es <br />the sand, grave <br />en <br />co <br />es <br />ayer w <br />ic <br />' from 7 to 14 feet thick end extends to bedrock. <br /> Bedrock is composed of one to three feet of weathered <br /> siltstones, sandstones, end claystones, then firm <br /> to dense bedrock to great depths. <br />i ' Groundwater was encountered at depths of one <br /> to 9 1/2 feet below the surface. Water levels <br />' are subject to seasonal fluctuations based on irrigation <br /> end the level of flow in the Cache Le Poudre River. <br />I <br />~ ~ o-~ <br />