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MC <br />SMITH MLLIAMS CONSULTANTS, INC. <br /> <br />• <br />CALCULATION TITLE PAGE <br />CLIENT <br />Cripple Creek & Victor Gold Company JOB NO. <br />1125 TASK NO. <br />A100 PAGE 1 OF 7 <br />PROJECT CALCULATION No. REV. No. <br />Arequa VLF 1 1 <br />SUBJECT/ TITLE <br />Rlear PI a Deei n <br />REV. PREPARER/ DATE REVIEWER/ DATE OA REVIEWER/ DATE CONFIRMATION <br />NO. REQUIRED M <br />1 Amanda L. Dolezal 2118108 Derek T. Wittwer 2120/08 J;rzy <br /> <br /> <br />CALCULATION OBJECTIVE <br />Design riser pipes, including the screen length, for the PSSA. <br />CALCULATION METHODOLOGY/ LIST of ASSUMPTIONS <br />• Screen length for riser pipes based on Roscoe-Moss Shutter Screen <br />Stainless Steel - Standard Flow <br />, <br />• Maximum flow required = 14,400 gpm <br />• Selected backfill = screened ore <br />REFERENCES <br />Roscoe Moss Company, "Casing and Screen Technical Information", Los Angeles, CA. <br />CONCLUSIONS <br />• 20 feet of Roscoe Moss Shutter Screen will be used for each riser pipe. <br />• One ten foot long compression joint will be used for each riser pipe and will be placed 15 feet below the top of the <br />riser. <br />• The total height of each riser pipe will be 50 feet. <br />• The shear pins used for each riser pipe will be 0.125 inches in diameter. <br />•