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C~J <br /> <br />1 <br />~~ <br />Wrenclto Mlne <br />EXCESS fiPOil DISP06~,~ MEAS <br />•~ Job NO. 25,251 <br />H <br />1 <br />W <br />TYPICAL TRI~~NGULAR <br />NO SCALE <br />VALLEY FILLS DRAIN REQUIREMI=NTS <br />FILL FILL MINIMUM. MINIMUM REQUIRED <br />VOLUME TYPE HEIGHT F~ WIDTH FT AREA SF <br />< 1,000,000 CY SANDSTONE 4 10 40 <br />SHALE 8 16 128 <br />> 1,000,000 CY SANDSTONE 8 16 128 <br />SHALE 16 16 256 <br />NON-VALLEY FILLS DRAIN REQUIREMENTS <br />FILL . <br />TYPE <br />SIDEHILL FlLLS, OR TOE DRAINS <br />ALONG FACE OF WIDE FILLS <br />MEDIUM TO LARGE VALLEY <br />SHAPED FILLS <br />D RAI N <br />DRAIN ROCK <br />DURABLE, NON-ACID, NON-TOX C FORMING ROCK. <br />SLAKE DURABILffY (ASTM D 46 4) -GREATER THAN 909a <br />FILTER FABRIC - MIRAFI 14 OR EQUNALENT. <br />S ECTI O N <br />EQUIVALENT TRIANGULAR TRIANGULAR RECOI <br />DRAIN DIMENSIONS (HxW) DRAIN AREA (SF) ROCK <br />6.5 x 13 42 907. <br />8 x 16 128 GRFJ <br />DED <br />MORE <br />THAN <br />12 INCHES, <br />8 x 16 128 MAXIMUM SIZE <br />EQUAL TO <br />16 x 32 256 1/4 jOF WIDTH. <br />EQUIVALENT TRIANGULAR TRIANGULAR RECOMMENDED <br />DRAIN DIMENSIONS (HxW) DRAIN AREA (SF) ROCK GRADATION <br />3 x 6 9 1" IO 6" ROCK <br />6 x 12 36 1' TO 2' ROCK <br />8 x 16 64 1' TO 2' ROCK <br />"Exhibit 13, <br />~ Disposal Area Stability Report, <br />Drain ~G~RES ~~ <br />Requirements <br />Flg. 5 <br />