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Quarry Department - Portland Plant Holcim (US) Inc. Phone 719-784-6325 <br />3500 State Hwy 120 Fax: 719-784-3470 <br />Hof c s m Florence, CO 81226 www.hoicim.com/us <br />December 14, 2007 DEC 18 2007 <br />Daniel Kibble, JR. Divisian c.i sec: enRatian, <br />P.O. Box 362 <br />Frisco, CO 80443-0362 <br />Re: Coaldale Gypsum - Division of Reclamation, Mining, and Safety Permit #M 1977 247 - <br />Amendment AMPre-blast survey requirement <br />This letter is to notify you that as a condition specified with the approval of Colorado State - <br />Department of Natural Resources, Division of Reclamation, Mining and Safety on Permit # M- <br />1977-247 - Coaldale Gypsum Quarry, Holcim (US) Inc. is required to conduct a Pre-Blast Survey <br />of potentially affected structures within one-half mile (2,640 feet) of the proposed blasting <br />locations at the Coaldale Gypsum Quarry. <br />Your property is located within one-half mile distance from the proposed blasting location and is <br />subject to the pre-blast survey requirement. Holcim will conduct the pre-blast services through a <br />third party service (Matheson Mining Consulting Services Inc.) that specializes in this type of <br />survey. Please indicate on the attached form if Holcim has your permission to conduct.the pre- <br />blast survey and return the form to my attention at: <br />Holcim (US) Inc. - Portland Plant <br />3500 Highway 120 <br />Florence, CO 81226 <br />Attn: Joe Lamanna <br />Should you have any questions please do not hesitate to call me at (719) 784-1209. <br />Sincerely, <br />Joe Lamanna <br />Quarry Manager <br />Portland Plant - Holcim (US) <br />Cc: Mr. Allen Sorenson, Division of Mining, Reclamation, and Safety, Reclamation Specialist <br />1313 Sherman Street Room 215 <br />Denver, CO 80203