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May 23, 2000- Mobilized to site. Mine safety conducted. $et up equipm <br />initiated for Low slump grout plug ar 300 + 30 as measured from the to <br />May 24, 2000- Two holes drilled with LM 100 drill to 44 & 45 feet on a <br />line in an attempt to intercept decant line. Mike Ley produced new info <br />indicated that pipe could be as deep as 75'. Denver Grouting / HS cont <br />contracted Auger Drilling to locate pipe. <br />GROUTING <br />A O'wI.a,, of Nor, !Wf <br />May 25.26.2000- Auger Drilling drills 6 holes ( #'s 3 -8 )'way from as <br />in an attempt to intercept decant, 4 Holes were drilled to the east, 2 hole <br />the west. No sign of gravel or pipe. <br />May 30, 2000 — Hole u 9 drilled back on assumed center 1 e to 100' to <br />Hole # 10 ( Grout hole # 1) was attempted 5.5 feet to the North at app <br />300 - 24. Resistance / Obstruction was encountered at 721. DG utilized <br />hammer to intercept pipe & to install casing. Air was injected & comm <br />riser tower verifying interception of pipe. <br />May 30. 2000- (Continued) Hole #11 ( Grout hole # 2) as attempted <br />line at 23.5 feet towards the tower at approximate station 300 + 0. Pipe <br />hammer drilled. Hole was air tested & communicated to the riser tower, <br />interception of decant <br />May 31.2000- Casing installed in Hole # 11 ( Grout hole ig 2 ) to appro <br />Hole 12 was located approximately 67' towards the tower at approx <br />30. This hole gazed the edge of the pipe. <br />Hole # 13 ( Grout hole 3 ) was drilled 16 inches to the West of hole <br />pipe encountered. Hammer drilled & air tested. Confirmation made at <br />May 31, 2000 — ( Continued) Low mobility grout plug installed in Gro <br />Slump of material averaged 1.5 inches. Pressures recorded at the injecti <br />from an initial pressure of 100 psi to 600 psi. 8 yards of ,lbw mobility <br />Water at the rower was displaced during grouting operations. Flows at <br />reduced from an original 10 to 15 gallons of overflow a minute prior to <br />nothing. <br />June 1.2000- Slurry grouting operations initiated in Grant hole g 2. In' <br />displacement of water was recorded at the riser tower. Gr of hole <br />unul grout was detected at Grout hole # 3. Injection was men moved to <br />continued until grout was detected at the riser. Calculated quantities we <br />indicating that grout apparently was flowing past the riser into the upp <br />Approximately 60+ yards of slurry were injected. <br />DENVER <br />RECEIVED TIME JUN.I6. 3:43RM <br />PR/NT TIME JUN.16. <br />nt. Drilling <br />er. <br />surned center <br />ation which <br />ted & <br />ed center line <br />were drilled to <br />o avail. <br />ate station <br />X1100 drill & <br />cared to the <br />n assumed center <br />ncountered & <br />verifying <br />imately 72'. <br />ate station 200 — <br />2. Center line of <br />er tower. <br />t Hole # 1. <br />n header ranged <br />out placed. <br />e tower were <br />routing, to <br />ediate <br /># 2 continued <br />ote # 3 and <br />e exceeded <br />decant line. <br />3:45PM <br />• nJL U4 <br />