Laserfiche WebLink
J. E. STOVER & ASSOCIATES, INC. <br />2352 NORTH 7' STREET, UNIT B <br />GRAND JUNCTION, COLORADO 81501 <br />PHONE: (970) 245-4101, FAX 242-7908 <br />MINE ENGINEERING <br />MINE RECLAMATION <br />May 20, 2009 <br />Mike Boulay <br />Division of Reclamation, Mining and Safety <br />101 South Td Street Suite 301 <br />Grand Junction, CO 81501 <br />Re: CAM Mining, LLC <br />Munger Canyon Mine <br />Portal Backfill <br />Permit No. C-1981-020 <br />Dear Mr. Boulay: <br />CAVIL ENGINEERING <br />CONST. MANAGEMENT <br />RECEIVED <br />MAY 2 2 2009 <br />GRIND JUNG I i(r. c iclb OFFICE <br />DIVI6ION OF <br />RECLAMATION MINING 8 SAFETY <br />The DRMS's inspection report dated May 13, 2009 noted a significant crack that <br />has opened up at one of the portal entries. On behalf of CAM Mining, LLC, <br />following is a plan to permanently repair the portal entry. The repairs will be <br />complete by the end of June 2009 or 30-days after plan approval whichever is <br />later. <br />Repair Plan: <br />Versa Foam System 15 will be spayed into the portal void. The outby section of <br />portal void will be filled with foam. CAM expects to use five to ten packs of foam. <br />The foam will provide a back stop for dirt fill. The foam will be plated with nine to <br />twelve inches of dirt and rock. The specifications of the foam are as follows: <br />Yield 16.5 cubic feet per pack <br />Strength 16.7 psi, 2405 psf <br />Weight 40 pounds per pack <br />The foam is surprisingly strong. It will support a 16-foot high column of rock. <br />Please feel free to contact me if you have any questions. <br />Sincerely, <br />J. E. Stover, P.E. <br />Consulting Engineer