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MONITOR WELL DRILLING AND CONSTRUCTION SUMMARY <br /> NUCLA AND NUCLA EAST MINES <br /> Monitor Well Name GW-N25(WM0025) Geologic Unit Monitored Overburden, Dakota Coa n <br /> Elevation Ground Level (ft-amsl ) 5731 _271 Underburden <br /> Location: N 604151 _972 E 1 ,117019,fl8 T 47 N R 16 W S 36 A D A <br /> Total Drill Depth (ft) 33.7 <br /> Total Well Depth (ft) 33.5 <br /> Drilling Details <br /> Borehole Diameter ( in) 5 1/4 to 17.0; 4 7/8 to 33.7 Rig Speedstar 1500 <br /> Bits Tricone and Core Driller Allan Chiles <br /> Drilling Fluid Air <br /> Additional Details Exploration Hole 875-E <br /> Drilling/Construction: Start 04/21/36 Finish 04/21/86 <br /> Lithologic Log (Y/N) Y <br /> Geophysical Log (Y/N) N <br /> Construction Details <br /> Casing Specs: Blank 2" id PVC sch40 Perforated 1/8" saw slot <br /> Perforated Interval (s) 27.5 - 33.5 <br /> Packer Set At 5.0' <br /> Cement From 0 ;; To <br /> Bentonite Slurry From NA To <br /> Gravel Pack From NA To <br /> Additional Details pry Hole <br /> Development Summary <br /> Comments , Problems Top of Lower Dakota Coal at 18.4 . Bottom at Lower Dakota <br /> rnal at 5 7' <br /> D-2E Revised 11/01/86 <br />