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• <br />U. S. Departmeni of Labor <br />February 6, 1980 <br />t/~ine Safety and Health Administration <br />P O Box 25367 <br />Denver, Colorado 80225 <br />Coal Mine Safety and Health <br />District 9 <br />IJilliam A. Anderson <br />Mine Superintendent <br />Sheridan Enterprises, Incorporated <br />9745 East Hampden Avenue <br />Denver, CO 80231 <br />~ `~: <br />'~: <br />,~~. <br />FHB 14 1980 <br />t <br />Re: hlcClane Canyon Test Site No. 1 <br />I. D. No, 05-03013 <br />Roof Control Addendum <br />Dear Mr. Anderson: <br /> <br />Your letter of January 31, 1980, to clarify those items of concern regarding <br />the conventional timbering plan under top coal or sandstone has been reviewed <br />~ and is approved. This addendum will be included in your currently approved <br />roof control plan. <br />Sincerely, <br />ohn W. arton <br />~istrict Manager <br /> <br />