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HM(S5;S <br />?G A • C • G. <br />Noy <br />?' M;??n9 ana ? <br />°,R®G e Austin Civil Group, Inc. <br />Land Planning - Civil Engineering - Development Services <br />November 24, 2009 <br />Mr. Travis Marshall RECEIVED <br />Environmental Protection Specialist <br />Division of Reclamation, Mining and Safety, Grand Junction Field Office NOV 2 5 2009 <br />101 S.3 rd St., Suite 301 UMJJ~'NCTICAN FILLD OFFICE <br />Grand Junction, Colorado 81501 . U1Vr1&0N OF <br />1/f=4`Mr10€tilif?'slPlit??i? & SAFETY <br />Re: 32.5 Road Gravel Pit, File No. M-2009-03 1,1121 <br />Responses to Second Adequacy Revie <br />Dear Mr. Marshall: <br />Based on your review of our application we have made the following clarifications. Please note <br />as you are reviewing the project that we have added 2 sheets to both Exhibit D and Exhibit F <br />respectively. The hope is to clarify the specific activities for each of the Exhibits. We have also <br />revised our hatching for clarity. See our responses to your review in Blue below. <br />1. EXHIBIT D - Mining Plan (Rule 6.4.4): <br />• In Exhibit D, under Typical Sequence of Operation, Item (2), it is stated that "The <br />area to be stripped topsoil area will be no larger than 4 acres in size at one time. <br />The total volume of stockpiled topsoil for the entire site includes approximately <br />24,000 cubic yards." Please explain/clarify how a total volume of 24,000 cubic <br />yards will be stockpiled if only 4 acres is to be disturbed at one time. Does the <br />estimated 4 acres of disturbance include the operations of roads and process <br />areas? Please clarify the maximum disturbances at any given time during the <br />operation. <br />RESPONSE: The active mining disturbance area will be 4 acres at one time. <br />The total stripped topsoil area will be no larger than 6 acres in size at one time <br />including the active mining area, the area for the scales, and the settlement <br />pond area. The volume of stockpiled topsoil for the active mining area will <br />include approximately 4,800 cubic yards. The total area to be disturbed at <br />one time including the settlement pond, access road, scales, and the active <br />mining area will be 6.19 acres. Revised on Page 8. 1 have also revised the <br />cooresponding portions of the Reclamation Plan section. <br />On page 10 in the application, paragraph 3, it is stated that "the settlement ponds will <br />allow the sediment to drop out of the water before it is discharged off site into the 33 <br />Road ditch." Please provide proof that the operator has permission to use the mentioned <br />water conveying structure <br />RESPONSE: Please find the attached letter from the Grand Valley Drainage <br />District. The locations are historical drainage locations into the 33 Road Drain <br />System. <br />336 main street - suite 203 - grand junction, colorado 81501 - 970-242-7540 phone - 970-255-1212 fax