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(Page 2) <br />MINE ID # OR PROSPECTING ID # M-1979-097 <br />INSPECTION DATE 03/28/06 INSPECTOR'S INITIALS ESC <br />OB38RVATION3 <br />This was a follow-up inspection from the Division's inspection of March 7, 2006 of the East <br />Rigden Pit, File No. M-1979-097 conducted by Erica Crosby of the Colorado Division of <br />Minerals & Geology. Eric Reckentine, Tim Nieson and Gary Knox of Lafarge were present during <br />the inspection. <br />Lafarge requested the inspection in order to demonstrate compliance with the approved <br />reclamation plan regarding armoring of the lateral berm that separates the East Rigden Pit <br />from the adjacent Port of Entry (POE) Pit operated by Lafarge (Permit M-1982-182). <br />The armoring and stabilization plan of the lateral berm was approved under Technical <br />Revision 03 (TR-03). The plan calls for a rock-armored channel to safely pass water <br />between the two pits. The filter material is to consist of 8" type 2 bedding followed by <br />2' type M riprap (dso = 9") and 1' mixed soil and rip rap on top (dso = 6"). <br />Lafarge began work on the armoring and stabilization plan after the Divisions inspection <br />of 3/7/06 and notice of possible violation of C.R.S. 34-32.5-116(1) for failure to follow <br />the approved reclamation plan. Lafarge graded the berm between the two pits and has <br />installed a majority of the rock armoring. Trenches were cut on the downslope of both <br />pits, and concrete was placed in the channel location. The concrete riprap exceeds the <br />design standards in terms of size. In addition, the rock is very angular and appears to <br />be keyed in well to the surrounding area. Another layer of rock is required on the toe of <br />the channel where it has been keyed in place. <br />Lafarge has completed most of the work associated with the channel. However, some <br />additional armoring is needed as well as final grading of the site. The operator will <br />need to complete the armoring by April 1, 2006 as previously noted in the Division's <br />inspection report and submit photographs of the completed armoring by May 1, 2006. <br />I & B Contact Addreae <br /> j' CE <br />NAME Eric Reckentine j" BL <br />OPERATOR Lafarge West, Inc. j' FS <br />STREET 1800 N. Taft Hill Rd. j' HW <br />CITY/STATE/ZIP Fort Collins, Colorado 80521 j' HMWMD (CH) <br /> j" SE <br />cc: Carl Mount; DMG j' WQCD (CH) <br />