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a w ~ , <br /> <br /> [`mow -id ~:r .t'.1 <br />' <br /> SS ~J > <br />P~Y <br />i[~ <br />i~~.~ <br /> . <br />. <br />t ' <br />f~~~.. .., •~ <br /> Lincoln DeVore <br /> loot Motor <br />' Grantl Junction, Colo 81501 <br /> (303) 2a2-8968 Octoh^r '-rF, 19F31 <br />' Paragor. Engineering Inc. <br /> 2784 Crossroads Blvd. Spite 104 <br /> Grand Junction, CO 81501 <br />' Re: File 1:0. 41FO~J <br /> Surficial Geology <br /> Ha11 Pit <br />' Grand Junction, Colorado <br />Gentlemen: <br />At yo•lr request, personnel from this opFi^e h.:v_ conducted ground <br />reconnaissance of the onsite geolonv i- order to determine the <br />geological constraints relating to the proposed Hall Gravel Pit. <br />Follo:•ling are our findings. <br /> The tract is located in the South rest of the So~ltheast k and <br />' the So•lthern '~ of the Southlrest '~ of Scctior. 2~, Township 1 South, <br /> Range 1 Last of the 6th Prinicpal Pleridian, <br />' The tracC is located in the Clifton dist-ict, east of the City of <br /> Grand Junction. <br />' The topography is sloping slightly to the north tuith elevations <br />running at 4i90 to 4810 feet above sea level •::ith the higher eleva- <br />tions to~•rard the southeast corner of the site. The site is dominated <br />' by ro111ng "Badlands" topography to the so•ith~vest. This ''Badlands" <br />topography is made vp of Atancos Shale, cut and v*eathered by inter- <br />mittent streams Bisecting the upland areas. <br />' This site is proposed for a sand and gravel pit. The depth to <br /> the gravel layer is greater than 20 feet anti is no[ greater than <br /> 10 feet in total thickness. Flith the amo~lrt of overburden over the <br /> gravel, there is a high risk for collapse ofE the sidewalls and <br /> creak areas around the open pit. In some cases, there may not be <br /> any gravel of economic va1~1e and a subs~rrfnce investigation should <br />' be done to provide a soils profi <br />of large amounts of overburden, le and to retermine the risk factor <br />sloughinc and collapsing into the <br /> pit. <br /> <br />1 <br />'~ <br />Colorado Springs, Colorado Pueblo, Colorado Grand Junction, Colorodo Glenwood Springs, Colorado Ewnston, Wyoming <br />