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MIJ-CONTINENT RESOURCES, INC. <br /> PRODUCERS OF THE FAMOUS COAL BASIN COKING COAL <br /> BOX 158 <br /> CARBONDALE, COLORADO 81623 TELEPHONE <br /> OMID-CONTINENT RESOURCES.INC. (303)963-2581 <br /> 245 PLAINFIELD ROAD-SUITE 220 TWX <br /> WILLOWBROOK.ILLINOIS 60521 December 14, 1983 _ 9109296897 <br /> TLX <br /> 45-0724 <br /> Mr, Jim Herron <br /> Mined Land Reclamation Division <br /> 423 Centennial Building <br /> 1313 Sherman St. S <br /> Denver, Colorado 80203 <br /> Re: Hydrology for T. R. Blending Bins: File No. C-017-81 <br /> Dear Jim, <br /> Enclosed are the calculations involving the addition of the disturbed <br /> land (0. 11 acre) to the 396-001 pond system. <br /> The present system has been designed as requiring 3.26 acre feet of <br /> storage (four ponds in series) . The as-built clean pond capacity is 3.89 <br /> acre feet, giving some 0.63 A.F. of extra storage. With a newly disturbed <br /> area of 0.11 acre, this would mean 0.1 AC disturbed equals 0.6 A.F. of <br /> storage, far above. the guidelines of 1.0 AC disturbed equals 0.1 A.F. of <br /> storage. <br /> See enclosed copy of Table II-B-App.-7 Att. 3 and copy of physical <br /> survey of sediment ponds; both these tables with a map will follow shortly <br /> in a letter from John Turner certifying as built sediment ponds. <br /> If you have any questions please contact me. <br /> Sincerely, <br /> Environmental Coordinator <br /> DIVBowman:ms <br /> Enclosures <br /> NOTE : For design criteria of new blending bin system <br /> contact Mid-Continent Environmental Coordinator . <br /> 19 <br />