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MINE ENGINEERING CIVIL ENGINEERING <br />MINE RECLAMATION CONST. MANAGEMENT <br />May 15, 2012 <br />3. E. STOVER & ASSOCIATES, INC. <br />2352 NORTH 7 STREET, UNIT B <br />GRAND 3UNCTION, COLORADO 81501 <br />PHONE: (970) 245 -4101, FAX 242 -7908 <br />Dan Hernandez <br />Division of Reclamation, Mining and Safety <br />1313 Sherman St., Room 215 <br />Denver, CO 80203 <br />Re: New Elk Mine Permit C -1981 -012 <br />Minor Revision No. 117 <br />Temporary DWDA Storage Area <br />Dear Mr. Hernandez: <br />On behalf of New Elk Coal Company, (NECC) enclosed is an application for a minor revision to establish a <br />temporary DWDA pile located in the soil storage area. A small portion of an access road will be turned <br />into a haul road in order to access the temporary DWDA storage pile. See Map -11, Sheet 1 for the <br />location of the haul road. <br />The existing DWDA is at full capacity. NECC needs a temporary pile as a transition to the West DWDA <br />(DWDA #3) and use of the approved belt line between the existing DWDA and RDA beltline. The pile will <br />be located north and east of the subsoil stockpiles shown on Map -11, Sheet 3. The temporary pile is <br />necessary to continue mining operations. <br />Development waste will temporarily be stockpiled in the soil storage area for at least 30 days, or until <br />such a time that Technical Revision 65 (DWDA #3) is approved. <br />The pile will be located on ground that is previously disturbed so the disturbed area, and the affected <br />area will not increase. <br />Since the temporary storage pile will be situated on ground that is previously disturbed, drainage <br />facilities, including ditches and culverts are assumed to be adequate. Drainage from the temporary <br />DWDA will be routed to culvert C9, and ultimately end up in Pond 007. It is assumed Ditch D6 is sized <br />appropriately to convey flow from the soil storage area since no new disturbance will be created with this <br />revision. In addition, according to Table 20, Ditch D9, the upland diversion ditch, has been sized to <br />handle a peak flow of 34.8 cfs. A SedCad verification was run, and for a 100 -year event, the drainage <br />area will generate a peak flow of 31.0 cfs. Therefore, it is assumed D9 was designed based on the 100 - <br />year event, and is considered adequately sized. <br />A new reclamation estimate is not required as this area was previously bonded as part of TR -55. <br />Please call with any questions. <br />Sincerely, <br />��.1 rrvY� C 1 c1 <br />Tamme Bishop, P.E. <br />Project Engineer <br />