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Alu// <br />TETRA TECH <br />Pe5p Crw-';e fV <br />September 4, 2009 <br />J Division <br />??s°G'ICri, <br />4V <br />Mr. William Rodman <br />3613 West F Street <br />Greeley, CO 80631 <br />RE: Lafarge Permit M-1977-036 <br />Dear Mr. Rodman: <br />Lafarge is in receipt of your letter of August 16, 2009 objecting to the Brown property expansion of <br />the 35`h Avenue mine if mining requires the removal of groundwater. The purpose of this letter is to <br />inform you of the area to be mined and mining methods to be used, as well as to address mitigation <br />plans to be implemented by Lafarge to protect existing area wells. <br />The expansion area is the Brown property located on the northwest side of the existing mine <br />approximately one mile northwest of your property. Mining on the Brown property will include <br />dewatering to allow for mining under dry conditions. Because of the distance, we do not anticipate <br />that mining of the Brown expansion will impact wells on your property. <br />Lafarge will have a groundwater monitoring and mitigation plan for the site that will be on file under <br />the permit at the Colorado Division of Mining and Reclamation Safety. The purpose of the plan will <br />be to monitor groundwater conditions in the area and to mitigate impacts to existing wells from the <br />mining operations. This plan spells out temporary mitigation measures for impacts suspected to be <br />due to Lafarge's operations, and long term measures for impacts determined to be by Lafarge's <br />operations. A copy of the monitoring and mitigation plan is attached. <br />If you have any questions or comments, please do not hesitate to call. <br />Sincerely, <br />TETRA TECH <br />ary Linden, R.G. <br />Project Manager <br />Attachment <br />cc: Anne Best Johnson, Lafarge <br />red Ebert, Colorado Div. of Reclamation <br />Julie Cozad, Tetra Tech <br />Pam Hora, Tetra Tech <br />1900 S. Sunset Street, Suite I-F Longmont, CO 80501 <br />Tel 303.772.5282 Fax 303.772.7039 www.tetratech.com <br />PA2351 1\1 33-23511-08005\Deliverables\DRMS\Objection letter\Rodman 090309.doc