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<br />• <br />Ot <br />~j xe,G <br />e`~ <br /> <br /> <br />safe mining operations in that area. Surface drainage will be disrupted by mining activities within a <br />larger overall acreage. Anew drainage study was performed and is included in an updated Water <br />Information exhibit. <br />This amendment, unlike previous amendments, makes a distinction between the limiu of mining and <br />the limits of disturbance. For the purposes of this amendment, "limit of mining" is defined as the <br />region of excavation within which product has been or will be extracted; and "limit of disturbance" is <br />defined as mined areas and areas of affeMed land outside the limits of mining. Land between the <br />limit of disturbance and the limit of mining will not be mined but will be used for access to mine <br />workings and for material stockpiles and berms. <br />The total azea of disturbance to be involved in the operation comprises approximately 184 acres and <br />reFlects an increase of approximately 50 acres over the presently approved total affected area of 134 <br />acres. Of this increase, the limits of mining will be increased by 38 acres and disturbance outside the <br />limits of mining will be increased by 12 acres. The areas and changes in areas aze distributed as <br />follows: ~ - 1(, <br />~ /~.t+r <br />r \~ Table I-1 <br />~" ~ Disturbance and Mining Area Suttunary <br />Location Previous Limit of Increase Limit of Increase <br /> Limit of Mining in Limit Disturbance in Limit <br /> Miningl This of Mining This of <br /> DisNrbance Amendment (Acres) Amendment Disturbance <br /> {Acres) (Acres) (Acres) (Acres) <br /> (1) (2) <br />North Quarry 32 70 38 78 46 <br />Central Quarry 48 51 3 54 6 <br />South Quarry 45 42 (3) 43 (2) <br />Process Area 9 9 0 9 0 <br />Totals ]34 172 38 184 50 <br />Notes: 1. Based on Mine Plan Amendment No. 3 <br />2. Includes increase in limit of mining <br />The onl y area where the limit of mining will be expanded significantly is in the North Quarry area. <br />This increase is made to accommodate a proposed reservoir in the bottom of the quarry and to <br />increase the operator's minable reserves. Very slight modifications to the limits of mining are <br />proposed at the eastern edge of the permit azea at the Central and South Quazries to facilitate <br />remediation of the east highwall of the Central Quarry and to provide for a temporary stockpile area <br />that will reduce visual impacts of mining in Unnamed Drainage No. 1. <br /> <br />/'l~~ <br />