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Quarry Department — Portland Plant <br />April 16, 2013 <br />Mr. Timothy Cazier <br />Environmental Protection Specialist <br />Division of Reclamation, Mining, and Safety <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />Dear Mr. Cazier <br />tiN <br />H olci m <br />The reason for the mines non - production status is as follows: <br />Holcim (US) Inc. <br />3500 State Hwy 120 <br />Florence, CO 81226 <br />RECEIVED <br />APR 2 2 2013 <br />7- DIVISION OF REC <br />MINING AND S AFETY ON <br />Phone 719 - 784 -6325 <br />Fax. 719 -784 -3470 <br />www.holcim.com /us <br />Subject: Notice of Temporary Cessation for Mine Permit # M- 2002 -096 — Ranch Land Rock <br />Pit#1 <br />Holcim (US) Inc. is submitting a "Notice of Temporary Cessation" for Mine Permit M- 2002 -096, <br />Ranch Land Rock Pit #1, as outlined by C.R.S. 34- 32.5- 103(11)(b) of the Colorado Land <br />Reclamation Act. As required, please find enclosed with this notice a revision fee in the amount <br />of $144.00. <br />We request that comencement of the initial five -year period for Temporary Cessation be <br />November 1, 2012. Prior to this date, reclamation activities performed in 2012 included the <br />removal of the previous landowners office, weight scale, and other operating equipment as well <br />as the removal of some dimension stone. <br />The Ranch Land property has extensive limestone reserves that are suitable for use as a calcium <br />source for the cement production process. Holcim purchased the property as a potential long- <br />term limestone reserve for the cement plant. Due to its remote location away from any populated <br />areas, proximity to the cement plant, and favorable geology, Holcim purchased the Ranch Land <br />site as an alternative to other lands Holcim holds along the Highway 50 corridor in Fremont, <br />County. <br />Holcim is currently in the process of evaluating the timing and economic requirements needed to <br />bring the Ranch Land property into operation as a limestone source for the plant. Holcim's <br />existing reserves at the Bear Creek Mine, (operated under DRMS Permit M- 1977 -344), lie within <br />close proximity to the Highway 50 corridor and contain a high stripping ratio. These variables as <br />well as the scope of the operation at the Ranch Land site are being considered. For this reason, <br />Holcim is submitting this request for Temporary Cessation until the results of our economic <br />evaluation are completed and we have the information needed to submit a formal request to the <br />division to modify the mine permit to allow for limestone extraction from the Ranch Land site as a <br />source for the cement plant. <br />