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MONITOR WELL DRILLING AND CONSTRUCTION SUMMARY <br /> NUCLA AND NUCLA EAST MINES <br /> Monitor Well Name GW-N15 (WN0015) Geologic Unit Monitored Dakota Coal Overburden <br /> Elevation Ground Level (ft-amsl ) 5712.55 <br /> Location: N 601939. 195 E 1 , 116089.86 T47 N R 16 W S36 D A C _ <br /> Total Drill Depth (ft) 79.8 <br /> Total Well Depth (ft) 79.8 <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 06/16/86 Finish 06/17/86 <br /> Lithologic Log (Y/N) N <br /> Geophysical Log (Y/N) N <br /> Construction Details <br /> Casing Specs : Blank 4" id PVC sch 40 Perforated 0.02" slot <br /> Perforated Interval (s) 15.3 - 79.8 <br /> Packer and Cement Basket Set At NA <br /> Cement From 5.0' To Ground Surface <br /> Bentonite Slurry From NA To <br /> Gravel Pack From 5.01 To 79.8 <br /> Additional Details Gravel pack generally less than 3/8" in diameter but <br /> some as large as 1 "; also contained some dried twigs. <br /> Development Summary Developed for 15 min. on 06/16/86; developed further on <br /> 06/17/86 for 3 112 hours ultimately producing 1 gpm with @ 1 tsp silt per min. <br /> Comments, Problems <br /> 15-2-8 Revised 11/01/86 <br />