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6-Main North Ventilation Installation (TROS-48) <br />Construction of the 6-Main North Ventilation Shaft will result in approximately 13.5 acres of distwbance for the <br />• shaft pad and associated access road. An upland and alluvial valley floor (AVF) soils investigation was <br />previously conducted along Fish Creek for azeas to be affected by proposed construction of two ventilation shaft <br />installations, the 18-Right Intake Shaft, and the 6-Main Notch Ventilation Shaft, grid the associated access roads. <br />The soils investigation was conducted in full compliance with the AVF requirements contained in Section 2.06.8 <br />of the Regulations of the Colorado Mined Land Reclamation Bgard for Coal Mining. Soil descriptions were <br />recorded from 12 continuous soil cores located along th'e proposed road corridors and within the vent shaft <br />disturbance azeas within and adjacent to the previously delineated Fish Creek AVF. Representative soil core <br />sample sites were located in TSN, R86W, Section 11 (Map 1S, 18 Right Bleeder Shaft) and Section 17 (Map <br />EX16E-M1, 6-North Mains Intake Shaft). The soil investigations were conducted on October 21 and 22, 2003 <br />by Kenneth E. Carlson, of Habitat Management, Inc., a Certified ;Professional Soil Scientist (#2824). The <br />detailed report of the investigations is, provided in Exhibit 16~, RAG Twentymile Coal Company, Fish Creek <br />Shaft & Access Road Soil Investigation, Routt County, Colorado, dated October 2003. The soils investigations <br />and results, covering the two shaft installations and associated roads, are summarized under the previous <br />discussion for the 18-Right Bleeder Shaft. Given that soil cores 9-12 fell within the proposed facilities and road <br />disturbance azeas for the 6-Main North Intake Shaft installation, the soils investigation results specific to these <br />cores are relevant to this project site. Detail maps for the soils investigations for the 6-Main North Ventilation <br />Installation are provided in Exhibit 16E. <br />WMD (Panels 12-Left through 17-Left, PR06-07) <br />The existing facilities currently in place at TCC will be used to support mining of coal in the WMD. TCC does <br />not anticipate the need to construct any new surface facilities, therefore, no response is required for this rule. <br />Rule 2.04.10 -Vegetation Information <br />• (1) The permit application shall contain a vegetation map,_preoared in accordance with 2.10, which <br />delineates plant communities within the Hermit area. or in case of underground mining, any area to be affected <br />by surface operations or facilities, and within any proposed reference area(s). The delineation of plant <br />communities shall be on the basis of the visually dominant perennial species. <br />f 21 If the applicant intends to use reference area(s) to evaluate the success of reve,?etation. as described <br />in 4.15.7(4). the proposed locations of these reference area(s) must be included on the vegetation maw <br />f3) The vegetation may shall include sufficient adjacent areas to allow evaluation of veeetation as <br />4) Plant communities shall be described in terms of species, composition, cover, productivity, and <br />woody plant density. The application shall include a discussion of environmental factors controlling or limiting <br />the distribution of species. such as elevation. slope. aspect, soils. water, availability, and past management. <br />Current condition shall be discussed for each community twe or portion thereof if significant differences exist <br />within a tune. <br />(5) The potential for impacts to rare and endangered plant species shall be evaluated in accordance with <br />requirements of 2.05.6(2)(a)(iii). <br />• <br />PR06-07 2.04-50.3 11/07/06 <br />