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STATE OF COLORADO <br />DIVISION OF RECLAMATION, MINING AND SAFETY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phone: (303) 866 -3567 <br />FAX: (303) 832 -8106 <br />June 4, 2013 <br />William A. Bear <br />Bowie Resources, LLC <br />P.O. Box 483 <br />Paonia, CO 81428 <br />Re: Bowie No. 2 Mine (Permit No. C- 1996 -083) <br />Minor Revision No. 136 (MR- 136) <br />Straw Wattles and Straw Logs for Sediment Control <br />Dear Mr. Bear: <br />COLORADO <br />ID IV I S I O N O F <br />RECLAMATION <br />MINING <br />SAFETY <br />John W. Hickenlooper <br />Governor <br />Mike King <br />Executive Director <br />Loretta E. Pineda <br />Director <br />The Division has completed a preliminary adequacy review of the minor revision application (MR -136) <br />submitted by Bowie Resources, LLC (BRL) for the Bowie No. 2 Mine. The revision proposes the use of <br />straw wattles and straw logs in addition to the currently approved silt fence for typical sediment control <br />designs on drill pads. We have the following comments and questions regarding the application. <br />1. Please revise Exhibit 8 to include: <br />a. A discussion of the typical flow rates with straw wattles and sediment logs as compared <br />to the flow rate of the currently approved silt fence designs that would indicate that the <br />wattles and logs will be as effective as a silt fence. <br />b. An indication that the total length of wattles or logs will be comparable to the length <br />indicated in the approved silt fence designs, including tie -back distance, and that the <br />wattles or logs will be overlapped to prevent bypassing when pieces are joined to <br />achieve the appropriate total linear footage. <br />C. A statement that wattles or logs will be installed with sufficient height to prevent <br />overtopping should the design flow depth indicate that it will exceed the height of a <br />properly keyed in wattle or log. <br />The decision due date for MR -136 is June 14, 2013. If BRL anticipates that this issue cannot be resolved <br />prior to the decision due date, please request an extended decision date. If you have any questions or need <br />additional information, please contact me. <br />Sincerely, <br />Susan L. Burgmaier <br />Environmental Protection Specialist <br />cc: Jim Stover, J.E. Stover & Associates <br />Office of Office of <br />Mined Land Reclamation Denver • Grand Junction • Durango Active and Inactive Mines <br />