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[it) TETRA TECH <br />November 30, 2010 <br />Ms. Lory Stephens <br />Boyd Irrigation Company <br />1100 10`" Street, Suite 300 <br />Greeley. CO 80631 <br />RE: Manmade structures within 200' of the Iverson Mine <br />Dear Ms. Stephens: <br />Lafarge West, Inc. (Lafarge) will be applying for a Regular 112 Reclamation Permit from the <br />Colorado Division of Reclamation, Mining, and Safety (DRMS) to mine sand and gravel on the <br />Iverson property which is located in Section 34 T6N, R66W of the Oh P.M., Weld County, <br />Colorado. As is required by the DRMS, we are notifying you on behalf of the Boyd Irrigation <br />Company because the Boyd Freeman Ditch will be within 200' of the land that will be affected by <br />mining and reclamation operations on the Iverson property. Therefore, the DRMS asks that Lafarge <br />submit a notarized agreement between the Boyd Irrigation Company and Lafarge that indicates that <br />Lafarge will compensate the Company (the structure owner) for any damage to the Boyd Freeman <br />Ditch caused by the mining. If an agreement cannot be reached, Lafarge is required to submit an <br />engineering evaluation to demonstrate that the structure will not be damaged by the mining <br />activities. <br />Therefore, as part of the process of designing the mining and reclamation plan for the Iverson <br />property, Lafarge asked Tetra Tech prepare a Stability Analysis Report to address the stability of <br />permanent manmade structures within 200' of the mining operation areas. Attached is a copy of that <br />Report. The Report indicates that while the proposed mining and reclamation activities on the <br />Iverson property will be less than 200' from the Boyd Freeman Ditch, it should not pose a hazard to <br />the ditch. <br />Attached are two copies of an Agreement that we have drafted which commits Lafarge to repairing, <br />replacing or compensating you for any damage to the ditch caused by the mining. We would ask <br />that you coordinate with the Ditch Company's Board to have a representative sign the Agreement, <br />have the signature notarized and then mail one copy of the Agreement back to me at the address <br />below. <br />Pain Hom <br />Tetra Tech <br />1900 S. Sunset Street, Suite IF <br />Longmont. CO 80501 <br />Phone: 303-772-5282 <br />Email: pam.hora rr tetratech.com