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Revised 11/15/81 <br /> 2.06.7 Variances for Delay in Contemporaneous Reclamation Requirements <br /> in Combined Surface and Underground Mining Operations <br /> The Maxwell Mine is not a combined surface and underground mining <br /> operation. Therefore, this Section is not applicable. <br /> 2.06.8 Surface Coal Mining and Reclamation Operations on Alluvial <br /> Valley Floors <br /> Extensive study of the area which will be affected by the Maxwell Mine <br /> indicates that an alluvial valley floor is present in the area of the <br /> Purgatoire River. The field mapping and associated work is shown in <br /> Exhibit 6, Hydrology and Geology Information, which has been prepared by <br /> Water, Waste, and Land Limited. The areas which have been traditionally <br /> flood irrigated or which have been sub-irrigated are delineated on the <br /> Regional Hydrology Map (Map 8). During the study and delineation of <br /> this alluvial valley floor, numerous monitoring wells were drilled and <br /> are also shown on the Regional Hydrology Map (Map 8) . Other information <br /> associated with the alluvial valley floor is shown on the Geology Map <br /> (Map 6) , the Land Use Map (Map 4) , the :vegetation Map (Map 11) , and the <br /> Soils Map (Map 10). Additional information which CF&I Steel Corporation <br /> has collected and is associated with the alluvial valley floor is shown <br /> in Exhibit 6, Land Use Information; Exhibit 8, Water Well Information, <br /> Exhibit 9, Water Quality Analysis, Exhibit 11, Soils Information, and <br /> Exhibit 12, Vegetation Information. <br /> CF&I Steel Corporation has completed a mine plan, shown on the Mine Plan <br /> Map (Map 3) , and described in Section 2.05.2 and 2.05.3, which will not <br /> interrupt, discontinue, or preclude farming on the alluvial valley <br /> floor, nor will it materially damage the quantity or quality of water in <br /> the surface and groundwater systems which supply the alluvial valley <br /> floor. Minimal surface operation and control and monitoring of <br /> subsidence, as discussed in the subsidence plan of this Section and <br /> shown in Exhibit 21 , Subsidence Control Plan, will be utilized to <br /> 2.06-2 <br />