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2 . 2 OREBODY <br /> The Climax orebody is a large , nearsurface , stock- <br /> works type deposit. The Ceresco, Upper and Lower Orebodies <br /> comprise the deposit ( Figure 4 . 1 ) . The orebodies are arcuate <br /> in section and circular in plan and are stacked one above the <br /> other with a remaining portion of the Ceresco Orebody being the <br /> highest. <br /> Known mineable ore extends from the surface of Cer- <br /> esco Ridge ( approximately the 12,500 foot elevation) down to an <br /> elevation of 10 ,400 feet. In plan, the deposit is at a maximum <br /> 3/4 of a mile in diameter. <br /> Because of the stacked orebodies, the variable time <br /> of emplacement of mineralization and the extreme variation in <br /> topography, the character and thickness of overburden is highly <br /> variable . Overburden ranges from minor soil cover to large <br /> amounts of glacial till to all rock types from precambrian <br /> schist through tertiary intrusive rocks. The thickness varies <br /> from zero to several hundred feet. <br /> 2.3 OPEN PIT <br /> Open Pit mining operations will remain through the <br /> end of the known Open Pit ore reserves. Presently, estimated <br /> ore tonnage of the Open Pit ( 1 ) is 150million tons with an ore <br /> grade of approximately . 305 percent MoS2. Total strip tonnage <br /> was approximately 380 million tons for an overall strip ratio <br /> of 1 . 83 to 1 . / The ultimate acreage to be affected within the ; <br /> bounds of the Open Pit and haul road system is 1265 acres . <br /> The --Climax Open Pit is designed as a modified slice <br /> system. The typical slice system consists of mining ore and <br /> waste increments more or less parallel to the final pit walls <br /> until final limits are reached. Each subsequent mining incre- <br /> ment will leave behind a bench that is lesg than 40 feet in <br /> width depending upon the stability of the particular geologic <br /> material. General criteria used for slope design of the Open <br /> Pit ranges from 45 degrees to 32 degrees depending upon rock <br /> conditions. Because of access problems on the top of Ceresco <br /> Ridge , this system was modified by mining the upper benches to <br /> 2-3 <br />