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MONITOR WELL DRILLING AND CONSTRUCTION SUMMARY <br /> NUCLA AND NUCLA EAST MINES <br /> Monitor Well Name GW-N16P1 (WN0116) Geologic Unit Monitored Dakota Coal Underbur <br /> Elevation Ground Level (ft-amsl ) 5673.25 <br /> Location: N 597932.487 E 1 , 117856.00 T46 N R15 W S 6 B C C _ <br /> Total Drill Depth (ft) 158.0 <br /> Total Well Depth (ft) 158.0 <br /> Drilling Details <br /> Borehole Diameter ( in) 7 7/8 Rig Speedstar 1500 <br /> Bits Tricon Driller Allan Chiles <br /> Drilling Fluid Air and Mud <br /> Additional Details Cleaned out hole with MAGCO LMP <br /> Drilling/Construction: Start 06/30/86 Finish 07/01 <br /> Lithologic Log (Y/N) N <br /> Geophysical Log (Y/N) N <br /> 1 <br /> Construction Details <br /> Casing Specs: Blank 4" id PVC sch 40 Perforated 0.02" slot <br /> Perforated Interval (s) 111 .3' - 158.0' <br /> Packer and Cement Basket Set At 111 .3' <br /> Cement From 98.3' To 111.3' <br /> Bentonite Slurry From 5.0' To 98.3' <br /> Gravel Pack From NA To <br /> Additional Details Top five feet of annulus sealed to ground surface <br /> with cement <br /> Development Sunwiary_ Same as GW-N16 <br /> Comments , Problems Contact between Lower Dakota Coal and Underburden at <br /> 107.4 feet <br /> D-10 Revised 11/01/86 <br />