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GROUND VALVE <br />LEVEL <br />x x x '~ 19 INCH HOLE FOR SURFACE <br />x x x CASING DRILLED 20 FEET DEEP <br />x x x <br />x x 16 INCH DIAMETER SURFACE <br />x CASING CEMENTED IN PLACE <br />x <br />x <br />x <br />15 INCH DIAMETER HOLE <br />1000-1800 FEET <br />250 FEET <br />25 FEET <br />x x <br />x x <br />x x <br />x ~ x <br />xn~x <br />~~~ <br />x ~~~ x <br />x iii x <br />xlllx <br />ni <br />x~~~x <br />~~~ <br />x~~~x <br />x x <br />u <br />MINING <br />DIRECTION <br />10 3/4 INCH STEEL CASING <br />CEMENTED IN PLACE <br />9 5/8 INCH HOLE <br />7 5/8 INCH SLOTTED STEEL <br />CASING NOT CEMENTED IN <br />PLACE <br />METHANE <br />GAS <br />If <br />/~irouNrw~r cronc ~s• ~ <br />COYPAN3; ,,. ra ma mr, m~~ xn. ra <br />m[rm<c m n~.w <br />L MK 61-01-@ <br />{y{ rIRWl0~00m <br />