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INTEROFFICE MEMORANDUM <br />TO: FILE <br />SUBJECT: C1981-018 DESERADO MINE MR-139 COST ESTIMATE <br />DATE: 12/5/2008 <br />The Deserado Mine Minor Revision 139 (MR-139) calls for the addition of a 10" breathable drill hole at <br />the RDH-03 with associated shed, and the adjustment of the bond estimate to allow for backfilling only <br />of the four return shafts associated with C-1981-018. <br />The costs associated with the concrete plugs and the drain pipe for the four return shafts is $9995.00. <br />This cost will be removed, as the total depth of the Return Shafts will be backfilled per 4.07.3. <br />The remaining direct costs of $2,605.00 associated with MR-139 plus the indirect costs of $663.00 for a <br />total of $3,268.00 will be subtracted by the difference of $9,995.00 from the modifications of Return <br />Shaft estimate. This brings the total reclamation costs associated with MR-139 to -$6,727.00.