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r Qu.ility Contrr•I Division <br />• 10 fasl 11 t1, Avc• • <br />Ucnvcr, Colorado 80220 <br />SU1111ARY Of RATIONALE <br />ROCKC.ASTLE COh1PAIJY, GRASSY CREEK COAL COMPANY <br />PERIiIT NUMBER: CO-0035653 <br />ROUTT COUNTY <br />TYPE OF FACILITY: Elinor Industrial <br />SIC NO.: 1211 <br />LOCAT104!: Sections 20, 28, 29. 31, and 32, Township 5 <br />North, Range 87 West, 10 miles to south <br />southeast of Hayden, Colorado. <br />COIJTACTS: William H. Zabel, Rockcastle Company <br />A.O. Box 103R <br />.Janesville, WI 53545 <br />(603)+754-2291 <br />P,ECCIVING IJATER: Grassy Creek <br />CLASS: Unclassified <br />Effluent Limited Segment <br />DESIGN FLDIJ: N.A. <br />FACILITt DESCRIPTIOIJ: This is a new coal mining operation that will <br />last approximately seven years. The pro- <br />duction will be approximately 250,000 tons/ <br />year with the disturbed area being approxi- <br />mately 20 acres/year. Runoff from undisturbed <br />areas will be routed around disturbed areas <br />- with a series of ditches. There will be five <br />different disturbed areas in the permit boun- <br />dary. Mining will star[ at the lower <br />elevations and progress uphill. A portion of <br />the lower pit will be left to collect runoff <br />from the disturbed areas. This pit has been <br />sized to collect runoff from a 100 year - 6 <br />v hour storm so that a no discharge condition <br />exists. Tliis satisfies [he Colorado River <br />Salinity Regulations. <br />The discharge points will be located at the <br />outfall structures of the five detention <br />ponds. <br />, <br />8111 Earley <br />7/13/78 <br />