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<br />I <br /> <br />DRILLING METHOD <br /> <br />HX Coring <br /> <br />DEPTH TO GROUNDWATER <br /> <br />Not Ene. <br /> <br />I <br /> <br />DESCRIPTION AND CLASSIFICATION <br /> <br />I <br /> <br />DESCRIPTION AND REMARKS <br /> <br />I <br />I <br /> <br />Tan gravelly silty coarse sand <br /> <br />I <br /> <br />Rock fragments between 7 and 9.5 feet. <br /> <br />I <br /> <br />at 9.5 ft. pushed split-spoon 3 inches, <br />retrieved gravelly coarse sand <br />silty fine to medium sand, some scattered <br />gravel in core barrel. <br /> <br />I <br /> <br />I <br /> <br />rock fragments <br /> <br />I <br /> <br />fine sand and silt. from return circulation. <br />brown clayey silty sand with gravel (20 %) <br /> <br />I <br /> <br />Brown sandy silty clay with some gravel <br />I to 2 inch rock fragments in core barrel <br /> <br />I <br /> <br />I <br />I <br /> <br />fine to medium sand in return circulation <br /> <br />I <br /> <br />Brown sandy silty clay to clayey silt and <br />rock fragments. <br />Loss of circulation at 3 I feet. No core <br />recovery <br />3 pieces of rhyolite breccia, 2, 3 and 5 <br />inches in size with horizontal and 45 <br />degrees vertical fractures. <br />Light grey rhyolite breccia. two horizontal <br />fractures at 33'3" and 34'10" <br />35-37.5 ft: one 32" piece of rhyolite <br /> <br />I <br /> <br />I <br /> <br /> <br />I <br /> <br />NORTHWEST, INC. <br /> <br />Consulting Engineers & Scientists <br /> <br />I <br /> <br />SURFACE ELEV ATtON 290.0 feet <br />BORING DIAMETER 3-inch <br /> <br />DEPTH <br /> <br />CON IST SOIL (FEET) <br />S TYPE <br /> <br />. . . <br />. . <br />. . . <br />. . . <br />. . . <br />. . <br /> <br />. . . <br />. . . <br /> <br />10 <br /> <br />15 <br /> <br />20 <br /> <br />25 <br /> <br />30 <br /> <br />35 <br /> <br />LOGGED BY <br /> <br />DATE DRILLED <br /> <br />NTD <br />8/11194 <br /> <br /> Zw~ ~ <br />'" OUI- '" >- <br />W HZLL. "'~ '" WELL <br />1-0::, wI- w~ <br />...J O::I-en 0 ~ <br />ll.. "'en", I-z 6.~ a '" <br />:E: I-HO o::w u~ '" ~ <br />0:: ",I- CONSTRUCTION <br />en wen...J Z W <br />ZWIO 0 '" <br /> ~a::- U <br /> <br />5 <br /> <br /> <br /> <br /> <br />5 <br />100 0 <br />100 91 <br />100 100 <br />100 83 ...... <br /> <br />EXPLORATORY BORING LOG B-1 <br /> <br />PROJECT NO. <br /> <br />7147-G <br /> <br />CONTINENTAL DAM <br />HINSDALE COUNTY, COLORADO <br /> <br />DATE <br /> <br />BORING <br />No. <br /> <br />February 10, 1995 <br /> <br /> <br />B-1 <br />