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1 . Background Information <br /> 1 .1 . Site Description <br /> The North Hangs site is located slightly southwest of Silt in Garfield County, Colorado. The site <br /> is located at 39.542688, -107.680721. The site is a total of 72.8 acres. <br /> The North Hangs Site bounded by Interstate 70 to the south and the Colorado River to the <br /> north. The surrounding areas include similar land uses such as mining, agriculture, and <br /> rangeland. A sand and gravel mine exists directly to the south across 1-70. The Bernudy ditch, <br /> owned by Grand River LLC, intersects the center of the site running east-west. The site is <br /> currently rangeland used for grazing. The site is flat with a slight gradient towards the river. <br /> The site location is shown in the vicinity map in Figure 1 below. <br /> at t �'.r` �•':" ' z'. . „" North 5.G :a42� Silt,CO (* <br /> p'(-' ' i:1 '0''"30''K.. Hangs Mine <br /> Colorado <br /> River <br /> l <br /> Altnitas .°+ ',\ r,.4 <br /> /. <br /> , 4� <br /> • <br /> f�,.a 'gip .� <br /> y a <br /> . . '"7 4 ' <br /> 1 <br /> .. •. <br /> ,, +yam :.,p- I{ ki, <br /> I70 <br /> \ <br /> III* <br /> w <br /> � <br /> Google Earth r _ ' <br /> 1 �" <br /> 1QO-ft <br /> Figure 1 —Vicinity Map <br /> The geology of the site is composed of a sand and gravel alluvial deposit created by the <br /> Colorado River. The deposit is overlain by approximately 18 inches of topsoil and two feet of <br /> overburden. The deposit itself is composed of sand and gravel, and is approximately 20 feet <br /> North Hangs Mine GW Monitoring <br /> Plan 2 lill Lewicki& Associates <br /> December 2024 <br />