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PEABODY COAL COMPANY - WESTERN DIVISION <br />MONITOR WELL CONSTRUCTION AND COMPLETION SUMMARY <br />• Mine: Seneca II-w Monitor Well Name: Gw-s2~d-2o0TC <br />Location Coors: 38623.0 S 25802.0 w Lithologic Unit Monitored?rout Creek Sands ton <br />Ground Surface Elev: 7196.7 7ota1 Depth: 760.4 <br />Peabody Personnel: T. Smith Driller: E. Hensley <br />Type of Drilling: ~4ud Rotary Drilling Fluid: Bentonite I <br />Borehole Diameter: 5.725 inch Completion Date: 10/t0i88 <br />Well Construction Diagram Completion Details <br />Depths Details <br />Top Se <br />0.0 - GS <br />•ent <br />6" Surface Casing <br />7.875" Boring <br />.19.0 - <br />5.125" Boring <br />Casing. Specs: Blank 1.56^ I~D~, x.475" G.0~ galvanized steel pipe <br />Perf ora ted 1.56" I.D., 1.938" O.D. fiberglass <br />screen with 2 columns of 1" long slots (0.025" slot openings) <br />Blank Interval(s) 0.0 - 615.9 feet <br />Perforated Interval(s) 615.9 - 760.4 feet <br />Packer and/or Cement Basket Set At <br />Nane <br />Bentonite Seal From To <br />Cement Seal From ~ To 6169 <br />Gravel Pack From 583.0 To 76D.4 <br />Casing Height or MP Above Ground Surface <br />Additional Details <br />1.875" Galvanized <br />Pipe <br />583.0- Frac Sand <br />593.0- <br />615.9- <br />8-12 Silica Sand <br />1.938" Fiberglass <br />Screen <br />5 <br />.4 TD <br />Development Summary <br />Comments: Eight centralizers were placed at 756. 736. 716.696. <br />676 656 636, and 616 feet. <br />End Sea <br />