2013-03-01_GENERAL DOCUMENTS - M1999051

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In Reply Refer To: LLCON050 3592 C- 0118326 C- 0118327 C- 0119986 C- 0119985 C -37474 Natural Soda Inc. Attention: Mike Clark 3200 County Rd. 31 Rifle, Colorado 81650 Dear Mr. Clark: United States Department of the Interior BUREAU OF LAND MANAGEMENT White River Field Office 220 East Market St. Meeker; Colorado 81641 FE . .4 913 We have reviewed your October 29,. 2012 request to construct a lighted site facility sign. The proposed project is located in Township 1 South, Range 98 West, Section 26, SE, 6 P.M. This project is considered to be a minor modification to the approved "Natural Soda 2010 Mine Plan and Environmental Monitoring Plan" and is approved with the following conditions of approval: 1. The applicant is responsible for informing all persons who are associated with the project that they will be subject to prosecution for knowingly disturbing archaeological sites or for collecting artifacts. 2. If any archaeological materials are discovered as a result of operations under this authorization, activity in the vicinity of the discovery will cease, and the BLM WRFO Archaeologist will be notified immediately. Work may not resume at that location until approved by the AO. The applicant will make every effort to protect the site from further impacts including looting, erosion, or other human or natural damage until BLM determines a treatment approach, and the treatment is completed. Unless previously determined in treatment plans or agreements, BLM will evaluate the cultural resources and, in consultation with the State Historic Preservation Office (SHPO), select the appropriate mitigation option within 48 hours of the discovery. The applicant,:under guidance of the BLM, will implement the mitigation in a timely manner. The process will be fully documented in reports, siteforms, maps drawings, and photographs. The BLM will forward documentation to the SHPO for review and concurrence.