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TIPTON AND KALMBACH, INC. <br />ONE PARK CENTRq L, SUITE Ia01 <br />1515 ARAPAHOS STREET <br /> <br /> CLINTON W~ MEH RING. PRESIDENT <br /> E. R. MICHELE. EXEC. VICE PRESIDENT <br /> D. D. HELTON. VICE PRESIDENT <br /> A. J. DEUTSCH,TREASURER <br /> J. H. TURN Eq~ SECRETARY- <br />Mr. Rich Atkinson <br />Colowyo Coal Company <br />5731 State Highwey 13 <br />Meeker, CO 81641 <br />August 8, 1983 <br />I~ <br />'':`; • Very truly yours, <br />TIPTON AND KALMBACH, INC. <br />/sue- ~~ /h°,~~~ <br />E. R. Mighe I <br />P.E. No. 6464 <br />Dear Mr. Atkinson: <br />DENVER,COLORADO 60202 <br />PHONE (303) 572-8081 <br />H EAO OFFICE IN DENV ER~COLO RqD O. SINGE IB33 <br />Fp DNDERS <br />ROYCE J. TIPTGN (i6B3-19671 <br />OLIN HALM BAGH (19 13-19 7 91 <br />GABLE: ARTIP-DENVER <br />Twx: 91 O ~ 931- 25a0 <br />Subject: Stoker Coal Siding Sedimentation Pond <br />Colowyo Mine <br />Enclosed are six copies of our computations for the Stoker Coal Siding <br />Sedimentation Pond and the inlet ditch to the pond. These computations show the <br />calculations for determining The 10-year and 25-year runoffs and the sediment yield for <br />three years. Also shown are the computations of storage aT various pond levels and the <br />setting of the pond outlet pipe, principal spillway, and emergency spillway. <br />All of these items have been designed by or under the direct supervision of a <br />Professional Engineer registered in the State of Colorado. <br />ERM/db <br />Encl; As noted <br /> <br />