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MONITOR WELL DRILLING AND CONSTRUCTION SUMMARY <br /> NUCLA AND NUCLA EAST MINES <br /> Monitor Well Name GW-N21(WN0021) Geologic Unit Monitored Dakota Coal Overburden <br /> Elevation Ground Level (ft-amsl ) 5740.94 <br /> Location: N 600392.383 E 1,119289.39 T 46 N R 15 W S 6 B A A <br /> Total Drill Depth (ft) 56.0 <br /> Total Well Depth ( ft) 56.0 <br /> Drilling Details <br /> Borehole Diameter ( in) 6 3/4,, Rig Speedstar 1500 <br /> Bits Tricone Driller Allan Chiles <br /> Drilling Fluid Air and Mud <br /> Additional Details <br /> Drilling/Construction: Start 07/09/86 Finish 07/09/86 <br /> Lithologic Log (Y/N) N <br /> Geophysical Log (Y/N) N <br /> Construction Details <br /> Casing Specs : Blank 4"id PVC sch40 Perforated 0.05" slot <br /> Perforated Intervals) 26.0' - 56.0' <br /> Packer and Cement Basket Set At NA <br /> Cement From 0.0 To 5.0' <br /> Bentonite Slurry From NA To <br /> Gravel Pack From 5.0' To 56.0' <br /> Additional Details <br /> Development Summary Air/water and air injection for an hour; produced about 10 gpm. <br /> Comments , Problems <br /> 15-2-11 Revised 11/01/86 <br />