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MONITOR WELL DRILLING AND CONSTRUCTION SUMMARY <br /> NUCLA AND NUCLA EAST MINES <br /> Monitor Well NameGW-N24(WM0024) Geologic Unit Monitored Overburden, Dakota Coal , <br /> Elevation Ground Level (ft-amsl ) 5764.05 Underburden <br /> Location: N 603814.995 E 1,118342.28 T 47 N R15 W S31 B C C _ <br /> Total Drill Depth (ft) 31.5 <br /> Total Well Depth (ft) 31.5 <br /> Drilling Details <br /> Borehole Diameter ( in) 5 1/4 to 15.0' ; 4 7/3 to 31.5Rig Speedstar 1500 <br /> Bits Tricone and Core Driller Allan Chile, <br /> Drilling Fluid Air <br /> Additional Details Exploration Hole 874-E <br /> Drilling/Construction: Start 04/21/86 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 Intervals) 25.5' - 31.5' <br /> Packer Set At 5.0' <br /> Cement From 0.0' To 5.0' <br /> Bentonite Slurry From NA To <br /> Gravel Pack From NA To <br /> Additional Details Dry Hole <br /> Development Sunanary <br /> Comments , Problems Top of Lower Dakota Coal at 15.7' . Bottom of Lower Dakota Coal at 23.5 <br /> D-24 Revised 11/01/86 <br />