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iii ii~iuiii~iu iii <br />STATE OF COLOI~AD0 r <br />Roy Romer, Governor <br />DEPARTMENT OF NATURAL RESOURCES <br />MINED LAND RECLAMATION DIVISION <br />FRED R. BANTA, Director <br />December 22, 1988 <br />Mr. Rick Mills <br />Colorado Yampa Coal Company <br />29587 Routt County Road No. 27 <br />Oak Creek, Colorado 80467 <br />Re: Channel 7, 31-1, 31-2, 41, 51 and 51W Certification - Eckman Park - <br />C-81-71 <br />Dear Mr. Mills: <br />On November 18, 1988, we received the above-referenced certification documents. <br />We must request additional information to ensure compliance with the existing <br />Division "Policy on Professional Certification." (A copy of the Policy is <br />attached for your review), and to ensure that the channels have been <br />constructed as required. Please submit the following information: <br />l.) Details regarding the various field and/or laboratory procedures used to <br />determine the adequacy of the channel construction. This would include <br />such information as survey reports, field inspection reports, details <br />regarding rock sizing and durability determination tests, etc. This <br />information should be contained within the ten inspection reports <br />referenced in the letter from Conrad H. Parrish. Please submit the <br />inspection reports and any supporting information. <br />2.) A specific statement indicating that riprap size and durability tests <br />were performed to verify compliance with design criteria. <br />Please contact me if you have questions. Thank you for your continued <br />cooperation. <br />Si ncgr~y, <br />David A "rry <br />Rec1 ion Specialist <br />DAB/bdc <br />Enclosure(s) <br />cc: Michael Savage, Mined Land Reclamation Division <br />A <br />217 9F <br />215 Centennial Building, 1313 Sherman Street Denver, Colorado 80203.2273 Tel. (303) 866.3567 <br />