2008-03-21_GENERAL DOCUMENTS - C1980007 (3)

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Additional surveys for Jumbo Mountain were completed by Western Cultural Resource Management, Inc. (WCRM, Inc.) during October and November 1993. Map 7A shows the areas surveyed during the field reconnaissance. A literature search was conducted by WCRM, Inc. in September 1993. That search identified 15 cultural resource reports. Those reports are listed in Exhibit 10A. Exhibit l OB contains the results of the survey. Exhibit 11 contains clearance documentation from the State Historic Preservation Officer. A Class II Cultural Resource Assessment was conducted by Metcalf Archeological Consultants, Inc., with the results of the assessment contained in a report dated January 1995. This report was submitted with Permit Revision No. 6 and is contained in Exhibit l OC. The State Historic Preservation Officer was contacted by the Division on August 21, 1995, and indicated concurrence with the submittal. The State Historical Preservation Office indicated in a letter to the Division dated October 5, 2007 that a portion of the proposed permit expansion area for Permit Revision 12 has been surveyed for cultural resources and a segment of the Deep Creek Ditch has been recorded. The ditch was found to be ineligible for the National Register of Historic places in 1996. As for most of Colorado, the PR-12 expansion area has not been fully inventoried for cultural resources and the undertaking proposed in PR-12 may have the potential to affect unidentified cultural resources. Geology -Rules 2.04.5 and 2.04.6 The applicant describes the geology of the permit and adjacent area in Section 2.04.5 of the permit document. Additional information is detailed on Map 9, which details the geology of the lease area, as well as the coal outcrop line and the strike and dip of the F and B Seams. Stratigraphic information is shown on Maps 10 through 23. The permit area lies on the southeast margin of the Piceance Basin and just south of Grand Mesa. The general geology of this area consists of gently (three to five degrees) north-northeast dipping beds of sandstone, shale, and coal of upper Cretaceous and early Tertiary age. The geologic formations exposed in the North Fork Drainage Basin consist of Late Cretaceous to Early Tertiary Age sedimentary strata, Tertiary Age igneous intrusives, and Quaternary Age alluvial and colluvial deposits. The units are described below in ascending order. The Mancos Shale is the oldest stratum exposed in the region, and is of Late Cretaceous Age. This unit is composed of over 4,000 feet of gray marine shales and minor interbedded buff sandstones. This unit is highly erodible and unstable. Erosion and oversteepening of slopes in this formation produce the numerous rock falls and landslides observed in the lower North Fork Drainage Basin (lunge, 1978). The Mesaverde Formation is of Late Cretaceous Age and conformably overlies the Mancos Shale. This formation consists of approximately 2,300 feet of marine and terrestrial sedimentary rocks. The Mesaverde Formation is the coal-bearing formation in the region and is divided into 7