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42.06 REQUIREMENTS FOR PERMITS FOR SPECIAL CATEGORIES OF MINING <br />• <br />2.06.8 Surface Coal Mining and Reclamation Operations on Areas, or Adjacent <br />to Areas, Including Alluvial Valley Floors. <br />(1) CWI has conducted detailed all w ial valley floor reconnais- <br />sances and requests the Division make a negative determination <br />for the permit area, excluding the train to adout facilities <br />(refer to the All w ial Valley Floor Appendix in Volume 4). <br />(2) Activities will be conducted under a Division issued permit. <br />(3) (a) Based upon the geomorphology of the permit area, CWI <br />initiated a detailed investigation to determine whether <br />or not the possibility of alluvial valley floor areas <br />exist within or adjacent to the permit area. Refer to <br />Alluvial Valley Floor Appendix, Voliune 4. <br />(b) The results of detailed field investigations encompass- <br />ing geologic, hydrologic, land use, soils, and vegeta- <br />tion, are presented in the Alluvial Valley Floor Appen- <br />dix in Voliane 4. The only location within or adjacent <br />to the permit boundaries fulfilling the requirements of <br />an alluvial valley floor is the train to adout facili- <br />ties in the North Fork of the Gunnison River Valley. <br />• These facilities will not alter the hydrologic rela- <br />tionships of the area, and restoration of post-mining <br />hydrologic Functions is addressed in the A11wia1 Val- <br />ley Floor Appendix in Voliane 4. <br />Excluding the North Fork of Che Gunnison River Valley, <br />the remainder of the permit area lacks alluvial valley <br />floor areas on the basis of: absence of historical <br />flood irrigation; lack of capability to be flood irri- <br />gated, based on stream flow water yield, topography, <br />and regional agricultural practices; and absence of <br />continuous sub-irrigation derived from tl~e groundwater <br />system, CWI requests, for the above reasons, the Divi- <br />sion make a negative determination regarding the exis- <br />tence of alluvial valley floor areas for the portions <br />of the permit area which will be undermined (refer to <br />[he Alluvial Valley Floor reports in Volume 4). <br />(i) Refer to Surficial Geology htap 2-2. <br />(ii) Refer to Maps 5-1, 9-1, and 9A-1. <br />• Revised 08/01/84 <br />Revised 10/01/87 <br />5 <br />