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Mav 2.:, 3000- Mobilized to site. Mine safety conducted. $ei up equipm 'nt. Drilling <br />initiated for Low slump groutplug ar 300 + 30 as measured from the to er. <br />I <br />May 24, 2000- Two holes drilled with LM 100 drill to X14 ? 45 feet on a surned center <br />line in an artempt to intercept decant line. 'Mike Ley produced nety info ation which <br />indicated that pipe could be as deep as 75'. Denver Grouting 1 RB conta ted & <br />contracted Auger Drilling to locate pipe <br />flay 25-25.2000- Auger Drilling drills 6 holes ( is 3-8 ) way from as ed center Line <br />in an attempt to intercept decant. 4 Holes were dnlled to the east, 2 hole were drilled to <br />the wesi. No sign of gravel or pipe. <br />May 30, 2000 - Hole = 9 drilled back on assumed center Itne to 1007 to o avail. <br />Rote ? 10 ( Grout hole # 1 ) was attempted 5.5 feet to the North at appro ate station <br />300 -+- 24. Resistance 1 Obstruction was encountered at 72'x. DG utilized M 100 drill & <br />hammer to intercept pipe & to install casing. Air was injected & commu cared to the <br />riser tower verifying interception of pipe. <br />May 30, 2000- (Continued } Hole 0~11 ( Grout hole ? 2) -Is attempted n assumed center <br />line at 23.5 f°et tw.vards the tower at approximate station 300 + 0. Pipe ncountered & <br />hammer drilled. Hole was air tested & communicated to the riser tower, verifying <br />interception of decant , <br />May ;1.2000- Casing installed in Hole ? l l ( Grout holey 2 ) to appro imately 72'. <br />Hale T 12 was locaied approximately 67' towards the tcw6r at approx' ate station 200 - <br />30. This hole grazed the edge of the pipe. ' <br />Hole T 13 ( Grout hole e 3 ) was dnlled 16 inches to the tk'est of hole r 2. Center line of <br />pipe encountered. Hammer drilled & air tested. Confirmation made at ' er tower. <br />i <br />,N-fa)• 31, 2000 - ( Continued } Low mobility grout plug installed in Gro r Hole r 1. <br />Slump of material averaged 1.5 inches. Pressures recorded at the injecti a header ranged <br />from an imtial pressure of 100 psi to 600 psi. 8 yards of 1;0w mobility rout placed. <br />Water at the tower was displaced during grouting operations. Flows at a tower were <br />reduced from an original 10 to 15 gallons of overflow a minute prior to routing, to <br />nothing. ! <br />June 1.2000- Slurry grouting operations initiated in Grout hole 9 2. Im ediate <br />displacement of water was recorded a; the riser tower. Grouting of hole ? 2 continued <br />until grout was detected a: Grout hole R 3. Injection was rnen moved to ole # 3 and <br />continued until grout was detected at the riser. Calct iated quantities we a exceeded <br />indicating that grout apparently was flowing past the riser into the uppe decant line. <br />%pproximareh' 601 yards of slurry were injected. ? <br />Ei?atoo <br />RECEIVED TIME JUN-16. 3:4---FM ? <br />PRINT TIME J!A`l.26. <br />3:45PM <br />-*" L; 14 <br />Z <br />W <br />u <br />a <br />a