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/~ Kennecott <br />/~ . Energy ~ . , Memorandum <br />co(oayocoolConr~anyL.P° <br />FOR: Steve Hinkmeyer <br />November l3, 1998 <br />Streeter Fill Monitoring Well <br />• <br />On October 12, 1998 drilling began on the Streeter Fill Monitoring Well #W6700. This well was <br />drilled as a substitute for Well #W6900N which failed in the 3rd quarter of 1997. This well is <br />located on the lowest bench of the Fill and penetrates the base alluvium. The hole did not make <br />any water during drilling, but circulation was lost at about 93 feet when the base of the fill was <br />reached. Based upon evidence from drill cuttings and lost circulation, the original ground surface <br />was encountered between 98 and 105 feet below collar elevation. <br />The following information and attached drawing correctly depicts well construction. <br />O Location - N 346,292.47,E 1,360,828.60, Elev. 6702.25 (top of surface casing) <br />Drilling Method - 6 inch down hole hammer with casing advancer system. <br />O Total Hole Depth - 108 feet <br />O 2" Stainless steel casing set +2.3' to 93' <br />2" Stainless steel screen (20 slot) set at 93' to 108' <br />O Borehole packing: <br />0' to 87' -environmental grade bentonite chips <br />87' to 90' - %: inch bentonite pellets <br />90' to I08' - 10/20 silica sand <br />O Surface Well Protection - 4" lockable well cover, betonite packing around casing <br />O Drilling Contractor -Maxim Technologies <br />2650 18th Street <br />Denver, CO 80221-3932 <br />~i~ ~ //-/3-9 9 <br />Brian Keith Briggs <br />Colorado Registered Professional Engineer # 31956 <br />• File: d:Uniscl\dmglwpin5398.wpd F~lBViSi0f1 ~~~ I I _ ~~ _SaJ <br />Revision No. Wl ~({ - y q <br />