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<br />I <br />I <br />I <br /> <br />DRILLING METHOD <br /> <br />HX Coring <br /> <br />DEPTH TO GROUNDWATER <br /> <br />Not Ene. <br /> <br />DESCRIPTION AND CLASSIFICATION <br /> <br />DESCRIPTION AND REMARKS <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Brown gravelly silty medium to coarse <br />sand, some cobbles and boulders <br /> <br />Brown gravelly medium to coarse sand, <br />liule silt. <br /> <br />loss of 5 cubic feet of drilling mud in 20 <br />minutes of drilling <br />Rock fragments in core barrel <br />Rock fragment sand coarse sand with <br />silty clayey coating <br /> <br />Gravel and medium to coarse sand, no <br />fines <br /> <br />loss of mud circulation for 20 minutes <br />Angular fine to coarse gravel and sand <br />and rock fragments with silty clayey <br />coating <br /> <br />Gravelly fme to coarse sand <br /> <br />rock fragments in core barrel <br /> <br /> <br />NORTHWEST, INC. <br />Consulting Engineers & Scientists <br /> <br />SURFACE ELEVATION 274.0 feet <br /> <br />BORING DIAMETER <br /> <br />LOGGED BY <br /> <br />NTD <br /> <br />8/13/94 <br /> <br />3-ineh <br /> <br />DATE DRILLED <br /> <br />DEPTH <br /> <br /> ZUl~ ~ <br />'" out- '" >- <br />Ul HZLL- "'~ '" i-lELL <br />t-"" Ult- Ul~ <br />-' "'t-Ul 0 ~ <br />0.. "'Ul:I t-Z 5;-': '" '" <br />:E: t-HO ",Ul u~ '" ~ <br />'" UlUl-' :It- Ul CONSTRUCTION <br />Ul ZUllO Z <br />0 '" <br /> ~Q:- U <br /> <br />CO IST SOIL (FEET) <br />NS TYPE <br /> <br /> 5 <br />." 21 <br />"" <br /> W <br /> 21 <br /> 15 <br />- <br />- <br />- <br />- <br />- <br />- 27 <br />- <br />- <br />- <br />- <br />- 20 <br />- <br />- <br />- <br />- <br /> 27 <br />.~: 25 <br />.......:- <br />.~: <br />.~: 24 <br />-:- <br />.~: <br />-:- <br />.~: <br />-:- <br />.-. 30 <br />.-.:: : <br />.~: <br />_-:. <br />.~: <br /> 26 <br /> 35 <br /> 34 <br /> <br />PROJECT NO. <br /> <br />7147-G <br /> <br /> <br /> <br /> <br />EXPLORATORY BORING LOG B-4 <br /> <br />CONTINENTAL DAM <br />HINSDALE COUNTY, COLORADO <br /> <br />DATE <br /> <br />BORING <br />No. <br /> <br />B-4 <br /> <br />February 10, 1995 <br />