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-16- <br />The surface water quality, diversions, sediment control, and discharge <br />structures sections of the application have been reviewed by the <br />Division. The surface water information can be found on pages 78-104 of <br />Volume 8; Pond Appendix of Volume 3 of the 1981 application; and as <br />amended in 2.04.5 and 2.04.7 of the permit revision. The information has <br />been reviewed and found to be in compliance with the requirements of this <br />section. <br />B. Ground Water <br />For a description of the ground water hydrology of the mine area and <br />permit revision area and a discussion of the impacts of mining on ground <br />water, please refer to the Regional Geology and Ground Water Hydrology <br />portion of Section IX, Probable Hydrologic Consequences and Cumulative <br />Impact Assessment of this document. <br />Ground water information can be found on pages 55-77 of Section 2.04 of <br />Volume 8, pages 126-163 of Section 2. U5 of Volume 8A, and in the ground <br />water Appendix of Volume 2 of the 1981 application; and in Sections <br />2.04.5 and 2.04.7 of the permit ammendment. The operation is in <br />compliance with the requirements of this section. <br />VI. ALLUVIAL VALLEY FLOURS (2:06:8, 4.24) <br />The discussion of alluvial valley floors can be found on pages 15-23, <br />Section 2.06, Volume 8A and AVF Nppendix of the 1981 application; <br />Alluvial Valley Floor Phase I study, September 7, 1982; Alluvial Valley <br />Floor Phase II study - October 8, 1982; and as revised in Section 2.06 of <br />the Permit Revision application. <br />Identification of Alluvial Valley Floors <br />The general area in which the Orchard Valley mine is situated contains <br />several deposits of alluvium. These alluvial deposits are made up of 3 <br />types of alluvium: 1) Flood-plain alluvium (Qal) along the North Fork of <br />the Gunnison River; 2) Valley-fill deposits (Qvf) along a portion of <br />Stevens Gulch; and 3) Alluvial gravels (Qag) divided into 3 age <br />categories (younyer (Qagy), middle (Qagm) and older (Qago)). These <br />deposits are located along the North Fork Valley side slopes. <br />The applicant has identified three areas within or adjacent to the <br />proposed life of mine area which may meet the geomorphic criteria of <br />alluvial valley floors. Alluvial deposits were identified in the Morrell <br />Cow Camp area which is tributary to Terror Creek, along Stevens Gulch and <br />along the North Fork of the Gunnison River. <br />