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1.0 INTRODUCTION <br />• 1.01 Description of the Area <br />This report is a supplement to a previous report (Amuedo and Ivey, Inc., 1994); <br />also see Attachment 13-6 in the permit package. This earlier report was prepared before <br />coal production began at the Yoast Mine. A brief discussion of the area from the earlier <br />report is (p. l ) <br />`"fhe proposed Yoast mine is located mainly in secs. 17, and 19, and in smaller parts of <br />secs. 8, 20, 29 and 30, T.SN., R.87W. in Routt County, Colorado. The haul-road <br />alignment originates in the north-central part of sec. 28, and passes southwestward and <br />southward through secs. 29 and 32, T.6N., R87W. and through secs. 5 and 8, T.SN., <br />R.87W." <br />A more detailed discussion of the area is given in the report. <br />1.02 Purpose and Scope of Investigation <br />The following background comments were made to the writer by Mr. Michael G. <br />Altavilla regarding the purpose and scope of the work to be done for the present project. <br />These comments were based on discussions at an adequacy meeting held on June 25, <br />1999, between Seneca Coal Company (hereafter referred to as SCC) and the Colorado <br />Department of Minerals and Geology (hereafter referred to as DMG). This meeting was <br />not attended by the writer. <br />"During the adequacy review of PR-Ol, the Colorado Division of Minerals and <br />Geology (DMG) raised concerns regarding potential landslides or unstable areas within <br />the southern area of the Yoast Mine. This geologic mapping (Exhibit 6-l, Site Specific <br />Geology) was originally done by Bruce Stover, CMLRD, December 1994, after the <br />original investigation A&I conducted, through the photogeologic interpretation of aerial <br />photographs. In the PAP, it was agreed that the areas would be field examined prior to <br />mining or facilities construction. SCC and Montgomery Watson conducted a field <br />investigation in May 1999 and provided a report and photo documentation to the DMG. <br />Based on the June 23, 1999 adequacy review of TR-I 1, the DMG expressed concerns on <br />the contents of this report." (Michael G. Altavilla, personal communication, July 19, <br />. 1999) <br />