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(c) The results of a geotechnical investigation of the proposed disposal silo including the following <br />(i) The character of bedrock and any adverse ecologic conditions in the disposal area <br />(ii) A survey identifying all springs, seepage and ground water flow observed or <br />anticipated during wet periods in the area of the disposal site; <br />(iii) A survey of the potential effects of subsidence of the subsurface strata due to past <br />and future minino operations: <br />(iv) A technical description of the rock materials to be utilized in the construction of <br />[hose disposal structures containing rock chimney cores or underlain by a rock drainage blanket: and <br />(v) A stability analysis including, but not limited to, strenrrth parameters pore <br />pressures and Iona-term seepage conditions. These data shall be accompanied by a description of all engineering <br />design assumptions and calculations and the alternatives considered in selecting the specific design specifications <br />and methods. <br />(d) If, under 4.09.1(101, rock toe buttresses or key-way cuts are reouired, the applications shall <br />include the followine: <br />(i) The number, location and depth of borings or test pits which shall be determined <br />with respect to the size of the spoil disposal structure and subsurface conditions; and <br />(ii) Engineerin,_specifications utilized to design the rock-toe buttresses or key-way <br />cuts which shall be determined in accordance with 2.05.3(6)(c)(v). <br />RESPONSE <br />The partial highwall excavation and the ramps contain 68,000 BCY of material which at a 28 percent swell factor <br />equals 87,000 CY and the low-permeable bamers contains 20,000 CY of material. An additional 68,000 CY of <br />spoil were required to till the pit to an elevation of 6,860 feet. This material was pushed into the pit from the spoils <br />to the south by dozers leaving the slopes at an angle of 2h to Iv. The resulting level storage area is approximately <br />200 feet wide at the west end, 100 feet at the east end and 1,700 feet in length. <br />As neither excess spoil nor underground development waste will be generated in connection with the Fish Creek <br />Tipple operation, the requirements of this section and Rule 4.09 do not apply. <br />(7) Coal Handline Structures <br />(a) A narrative and appropriate map, prepared to meet the standards of 2.10, gettcrally <br />explaining the location, construction, modification, use, maintenance and removal of coal removal, handling, <br />sloraee, cleaning, and transportation areas and structures in accordance with 4.01.1. <br />RESPONSE <br />Coal handling structures are shown on the Map 24, Surface Facilities. The coal will be conveyed from the portals <br />to a point where it will be stockpiled in an open pile. The coal will be either conveyed or trucked to Tipple 2. <br /> <br /> <br />Permit Renewal No. 3 2.05-86 4/1/99 <br />