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Timothy Pierce, for Rimrock Exploration and Development, Inc. (Rimrock) <br />P.O. Box 430 <br />Nucla, Colorado 81424 <br />Mr. Russ Means <br />Colorado Division of Reclamation, Mining, and Safety (Division) <br />Grand Junction Field Office <br />101 South 3 Ave, Suite 301 <br />Grand Junction, CO 81501 <br />Sincerely, <br />Timothy . Pierce <br />cdpierce35 @aol.com <br />970 - 864 -7455 <br />31 October, 2011 <br />f 'nn c7 <br />o a <br />NOV 2 2011 <br />GRAND ,, .;c,;.: ! +: ; .: _ U OFFICE <br />RECIJ MP €'iOr t'',I:■:iNG & SAFETY <br />RE: J -Birds Mine Permit M- 2005 -050 Technical Revision 02 Response to Division Comments <br />Dear Mr. Means; <br />Attached please find the following pages: <br />• One copy of the Division's review comments dated September 26, 2011 for Technical <br />Revision 02 to Permit M- 2005 -050 with a relevant response from Rimrock's contract <br />engineer inserted following each Division comment. <br />• The following supporting documentation for the Rimrock response to the Division's <br />September 26 review comments is also attached. <br />o Construction design detail sheets for the Upper and Lower Ponds. <br />o An NCRS Websoil map and hydrologic soils group report for the J -Bird mine site. <br />o Flow calculation reports for TR -20 (WinTR -20 ver. 1.10) and TR -55 (WinTR -55 <br />ver. 1.00.09) method. <br />• Additionally, an electronic copy of the documents listed above is being forwarded to your <br />email address at the CDRMS Grand Junction Field Office. <br />Please contact me at 970 - 864 -7455 with any questions regarding this response to the Division's <br />September 26 review of Technical Revision 02. Alternatively, if I cannot be reached, then please <br />call Alan Chiles at 970 - 417 -1239 for information. <br />®nisi nc'r•:_; ,r, <br />