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MONITOR WELL DRILLING AND CONSTRUCTION SUMI4P.RY <br />NUCLA AND NUCLA EAST MINES • <br />Monitor Well Name GW-N16P1 (WN0116) Geologic Unit Monitored Dakota Coal Underbu_rden <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 [frill Depth (ft) 158.0 y <br />Total 61e11 Deptli (ft) 158.0 <br />Drilling Details <br />Borehole Diameter (in) 7 7/8 <br />Bits Tricon Driller <br />Drilling Fluid Air and Idud <br />Additional Details Cleaned out hole with MAGCO I_MP <br />Drilling/Construction: Start 06/30/86 <br />Lithologic Log (Y/N) N <br />Geophysical Log (Y/N) N <br />Construction Details <br />Casing Specs: Blank 4" id PUC sch 40 <br />Perforated Interval(s) 111.3' - 158.0' <br />Packer and Cement Basket Set At 111.3' <br />Cement From 98.3' <br />Bentonite Slurry From 5.0' <br />Gravel Pack From NA fo_ <br />Additional Details Top five feet of annulus sealed to <br />with cement <br />Development Sunonary Same as GW-N16 <br />Rig_ Speedstar 1500_` <br />Allan Chiles <br />• <br />To 111..3' <br />round surface <br />Comments, Problems Contact between Lower Dakota Coal and Underburden at _. <br />107.4 feet <br />To 98.3' <br />Finish 07/01 <br />Perforated 0.02" slot <br />D-10 Revised 11/01/F16 <br />