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REX E LOESBY PE 3037719652 P. 03 • • (c) Overburden and Wrste Rock: The quarry is an underground operation and will remove material from areas already developed in the marble seam underground. Additional entries may be driven to the south of existing entries, but within the affected area, to allow removal of material from newly developed areas. 'T'here aze existing waste marble piles that remain from prior operators. Most of the waste wes generated from queaying activities that occtvred between 1886 and 19A1. Exhibit E: Mining Plan Map, with a background of an aerial photo of the quarry site, cleazly shows the surface extent of these waste piles prior to 1990 with the marble's characteristic brilliant white color. The background photogrnph was taken prior to the operating activities of CYMC. CYMC's activities involved the construction of the private access road, extension of existing waste piles a few tern of feet to the north, east, and south, construction of access mods on the existing waste piles, and construction of stormwater control features. Sierra anticipates no significant additions to these features, although portions of the roads may be extended slightly or relocated to allow efficient placement of waste marble and the marble waste piles will be extended to the east and south. The operation will generate low volumes of waste marble. Production rates anticipated by Sierra are between 4,000 and 16,000 short tons of dimension stone annually. Such oporations arc expected to generate an equal tonnage of waste blocks, gravel, and saw cutting fines. The fines will be small, minus 50 mesh, and will be high m moisture content (estimated higher ihau 50% moisture) when placed upon the waste dumps, The materials will be blended in the dumps to prevent the fines from causing sediment runoff, wind entrainment, and to effectively utilized the waste area capacity by £lling voids between the larger waste rocks. Sonte of the waste materials may be removed from the site if suitable uses end markets can be developed for them, allhouglr initial plans only call for removal of dimension stone blocks from underground working faces. Sierra will not dump fines on the waste piles until the effectiveness of the sediment control structure is reestablished, nor will Sierra dump waste blocks iur any area where CYMC may have caused damage that was a violation of its permit. Expansion of the waste piles will require some timber cutting, primarily to the south and east of the existing piles. Trees will 6e cut before blocks are allowed to impact these areas. The wood will be cut for fuewood or stockpiled for use in ferning of other quarry operations purposes. An attempt will be made to recover topsoil from these azeas to be stockpiled for later reclamation efforts. (d) Thickness of Aeposit: The marble to be quarried is approximately 300 feet thick (true pcrpcndicular thickness) in the vicinity of the affecied area, The marble seam dips to the west at approximately 53 degrees with a strike of approximately North 26 degrees West. (c) Mining Operation Components; The primary components of the operationwithin tltc affected area consist of the existing quarry portal entry driven by CYMC in 1990, three large historic quarry entries from earlier operations, a quarry water discharge system, access roads, marble waste piles, and a sediment control structure. Thera also exists a 10,000 gallon diesel