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This design models existing grade conditions after successfully excavating footing down to solid bedrock. The footing <br />is cast directly onto bedrock, incorporating #8 rebar pins set on 2' centers into bedrock (see below). <br />0 <br />#5 Gr 60 Rebar <br />12" OC Horz: <br />12" OC Vert. <br />#5 Gr 60 Rebar <br />12 OC Horz. <br />18" OC Vert. <br />21 \ 2 1 <br />22' <br />#8 Gr 60 Rebar x 4' <br />Drilled and Grouted 2' <br />into Solid Rock @ 2' OC <br />2' <br />#5 Gr 60 Rebar <br />12" OC Horz. <br />6" OC Vert. <br />16' <br />61 <br />1 <br />63 <br />#5 Gr 60 Rebar <br />12" OC Horz. <br />12" OC Vert. <br />#5 Gr 60 Rebar <br />12" OC Horz. <br />� � ! 18" OC Vert. <br />\ #5 Gr 60 Rebar & #8 Gr 60 Rebar, 3' -4" Hook <br />12" OC Horz. 6" OC Vert. <br />#5 Gr 60 Rebar <br />12" OC Horz. <br />12" OC Vert. <br />3" Overflow to Sediment Pond <br />3' - 4 " <br />"Wet" Side <br />8' 2 <br />2 <br />8' ' <br />(sump omitted from view for clarity) <br />3" Overflow <br />from 10" to 8" Thick Wall <br />#5 Gr 60 Rebar <br />�� <br />12 OC Horz. #5 Gr 60 Rebar & #8 Gr 60 Rebar, 3' -4" Hook <br />6" OC Vert. 12" OC Horz. <br />Backfill on "dry" side (south) shall consist of earth and rock excavated from "wet" side. Width of back fill at top <br />of wall shall be a minimum of 12' to allow for vehicle traffic. Sloped side of backfill shall be revegatated to <br />prevent erosion. <br />The leachate collection line shall be connected to a series of 4" perforated plastic drain lines, covered in <br />geotextile filter fabric, to facilitate dewatering and settling of the deposited tailings. These drain lines shall <br />be spaced at least 20' on center throughout the tailings disposal field. <br />The leachate will be pumped back to the mill as recycled process water. <br />6" OC Vert. <br />24" 1.5" Leachate Recycle <br />8 <br />t► (pump discharge) <br />, <br />M <br />14' - 8 " <br />8' -0" <br />10 <br />1 . <br />10" <br />7 <br />4" Leachate Collection, wet sump, <br />connected to system of 4" perforated <br />pipe networked throughout the <br />disposal field. <br />421 <br />0 <br />#5 Gr 60 Rebar <br />12 OC Horz. <br />18 OC Vert. <br />Top of Structure <br />Datum 8,320.00' Elev. <br />• <br />w o o <br />V <br />� V <br />0 <br />4� <br />4� <br />s� <br />I <br />�1 <br />C M <br />� <br />r <br />w <br />o <br />o� <br />� <br />m <br />c:. <br />p Cl1 <br />tj <br />a� <br />• <br />w o o <br />V <br />� V <br />0 <br />4� <br />4� <br />iE81 <br />s� <br />I <br />�1 <br />tj <br />iE81 <br />