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• MONITOR WELL DRILLING AND CONSTRUCTION SUMMARY <br />NUCLA AND NUCLA EAST MINES <br />Monitor Well Name GW-N14 (WN0014) Geologic Unit Monitored Dakota Coal <br />Elevation Gruund Level (ft-amsl) 5110.82 <br />Location: N 601954.173 E 1,11609U.57T 47 N R 16 W S 36 D A C <br />total Drill Depth (ft) 95.0 <br />Total Well Depth (ft) 95.0 <br />Drilling Details <br />Borehole Diameter (in) 7 7/8 to 79.6; 6 3/4 to 95.0 Rig Speedstar 1500 <br />Bits Tricone Driller Allan Chiles <br />Drilling Fluid _ <br />Additional Details <br />Drilling/Construction: Start 06/14/86 Finish 06/16/86 <br />Lithologic Log (Y/N) N <br />• Geophysical Log (Y/W) N <br />Constructio~i Details <br />Casing Specs: Blank 4" id PVC sch 40 Perforated 0.02" slot <br />Perforated Interval(s) 80.1' - 95.0' <br />Packer and Cement Basket Set At 80.1' <br />Cement Frum 74.0' To 80.1' <br />Bentonite Slurry From 5.0' To 74.0' <br />Gravel Pack Frum NA Tu <br />Additional Details Top five feet of annulus sealed to ground surface with <br />cement <br />Development Sunnnary_ Airlift while injecting with water and then only air for <br />1 hour; cleaned up and made approximately 0.25 gpm <br />• Coimuents, Problems lop of Upper Dakota Coal @ 81.0 feet. Top of Lower Dakota <br />Coal @ 89.1. Still in coal at 95.0 feet. <br />Air and t4ud <br />D-5 Revised 11/01/86 <br />