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• disturbed for each year of mining will va disturbed for each of the first 8 ry, gradually increasing upslope. Figure D-I illustrates Year's ofmining, A box cut of about 16 acres the area inifiate the operation and be co.4i00 ed toong by 450 feet wide) with an average depth of 45 to 50 feet will ramp oriented approximate) the adjacent p(ani b remain open to allow y Parallel to the do Y an excavated earth incline truck equipment access to subse wn slope prt wall. portions of this initial o and access sump, and drainage ditch. Subse cent] quent mine panels, and for containin Penin collection drainage ditch, conve q y' as noted above, g will the limestone from this initial cutowillnd the tmtial openin g the1n'Pit conveyor, pit access ramp will be moved t ~heilsoutheast Material above and 5, as noted on Exhibit D-1, and temporazijed eve n area south and south-east of minin the Year 6 operating block (not illustrated) wit be stored above thebYear i 5 g Year blocks 4 at the northern and western ed (Pre-stripped materials from exceeding 7p percent. Final higes and the sides of the earthen incline will be excavated g block.) The highwalls Surface Water Management ply (Halls will be sloped 4II;1 V and stabilized to control erosion. See the with slopes not PPendix F~ for a discussion of storm water controls. Mining of the limestone and u southwesterly direction p to 5 feet of bottom sandstone ~e~ill continue from this box cut in a general) as shown on Exhibit D-l. Incremental production y along strike, The panels era offset slightly relative to strike to pif floor in order to facilitate panels will be established block, The dimension of Passive drainage to the sum achieve an overall slope along the regardless of the thin wkly Panels must be at leasts24,ing pond) located in the first limestone kness of the limestone la feet wide b Year mining to be removed in the week) Yers, approximate! y 600-feet long. There are, unconsolidated la er Y panels. The limes y 7,000 to 15,000 cubic azea to be Y (including subsoil and to soil tone to be removed Yards of • mined. The avers e P )and shale approximate) p_ is covered by an approximately 450- to 600- g yearly pane} dimension for the first frve to 45-feet thick in the thickness of limestone feet wide (upslope) by an average of 1,400_ years of production level of I, plus 1 to 6 feet of the feet ion mining will be 5 million tons Codell Sandstone) to maintain a by 20 to 30 feet in be dependant on the thickness of limestoene emovedlinrea affected b Aroposed [imestone Areas undergoing active order to maintain ithe in any one given time. As each productiongblocki~g subject to wind erosion wip be 1' annual producti year will subsoil will be removed fro Progresses, unconsolidated united to 15.5 acres at an target. on the m the pre strip areas and carried b hind~current production Y point in pit floor from which the limestone and sandstone have been removed, g with topsoil and regraded unconsolidated materials and shale have been Panels and to subsoil and to placed psoil placement and seedin , Placed. This backfill material will be graded plriort revegetation periods. The combined area of active minind aceordin to vary from year to ear b g weather conditions and seasonal requirements. Y ased on thickness of g' Processing, stockpiling, and reclamation will the various materials encountered and production Limestone btastin standard practices. Mostlblashn once or twice per wee re wire low_ g will occur in limestone, by a licensed blasting contractor following q level blasting. A short summa but on infrequent occasions the overburden will 6.5 Exhibit. The specific btastin ry of blasting practices is listed below and discuss estimating impacts from btastin g design detail summarized below represents var de g and should not be considered ~ m the Rule Y pending on the specific rock bein Permit conditions. A~~ lablasot desio n for efficient procedures and practices accordinroken, equipment on site, technolo responsible for the blast, g to the ex gY available g will perience and trainin ,and the most g of the (ioensed contractor 1 ~ To achieve a powder factor of about 0.81b/ton, it is anticipated that 6.25-inch contain up to 360 pounds of blasting agents (ANFO interval. diameter holes will and an accelerator, with an approved delay i i SO-Mine Pemil~ ~khibitc (JU1.03,02)FINAL.doc July 3, 2002 D-3