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LAFARGE <br />NORTH AMERICA <br />Construction Materials <br />August 27, 2003 <br />Mr. Thomas Schreiner <br />Environmental protection Specialist <br />Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />RE: River Valley Resource, Permit No. M-2001-090 -Responses to August 21, 2003 <br />Letter C/aSt: ~~visiort `TOe Szg : ~k!-1 <br />Dear Mr. Schreiner: <br />Lafarge West, Inc. (Lafarge) has prepared the following responses to your letter of August 21, <br />2003. This response will address each point in the same order as your letter. Tn addition, Lafarge <br />has also prepared a response to your question concerning the stability analysis of any man-made <br />structure within 200 feet of the mining crest. Our responses are as follows: <br />1) Lafarge West, Inc. will supply the DMG either a signed, notarized agreement with the <br />owners of the Suttle Ditch or a court decree allowing the relocation of the ditch prior to <br />moving the Suttle Ditch or mining closer than 40 feet as recommended by Greystone <br />Environmental Consultants (Greystone) in the attachment to this letter. As stated in <br />previous correspondence, Lafarge is pleased to accept this as a condition of our permit <br />amendment. <br />2) It is Lafarge's intention to obtain the agreement and/or court decree for the relocation <br />of the Suttle Ditch as soon as possible after completing this Permit Amendment. It is <br />Lafarge's preference that the relocated ditch be constructed and tested prior to mining <br />closer than 40 feet of the existing structure (as determined by the Greystone Stability <br />Study). However, according to our mine plan we will not be closer than 40 feet of the <br />Suttle Ditch for the first three years or so. For this reason, Lafarge will initiate mining as <br />soon as all of the necessary permits are in place whether the agreements for the relocation <br />of the Suttle Ditch are in place or not. However, Lafarge will not mine closer than 40 <br />feet to the Suttle Ditch until all of the requisite agreements are in place. <br />3) With regard to the man-made structures on or adjacent to the site, it is Lafarge's <br />opinion that we have met the requirements of the regulations for mining closer than 200 <br />feet by commissioning the attached stability study. It is Lafarge's opinion that the <br />stability analysis completed by Greystone Environmental Consultants provides the <br />necessary data to support this opinion. Specific answers to the questions on the stability <br />of any man-made structures are as follows: <br />Western U.S. Region <br />1400 W. 64th Ave., P.O. BOX 21588, Denver, Colorado 80221-0588 <br />Office: (303) 657-4000 <br />Web: www.lafargenorthamerica.<om <br />