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VWRY..�977 2 <br />Map C-3 Cross Sections <br />Ralston Quarry <br />halt Paving Co. <br />DRMS Permit Num r: M-1974 <br />Mine Entry Locatio Latitud .81222 Longitude: 105.23139 <br />State: CO County: Jefferson Nearest Town: Arvada <br />Section:4 Township: 3S Range: 70W PM: 6th <br />Major Watershed: -- <br />Map Scale As Shown <br />Map Georeferencing Information: Datum: NAD83 Projection: CO Central <br />Survey Source: Google & Drone Survey Date: 2010 & 2018 <br />Imagery Source: Google & Drone Imagery Date: 08/16/18 <br />Drawn by: BEL Date: 08/25/18 <br />Checked by: BEL Date: ---- <br />Approved by: GL Date: ---- <br />File Name: EAWork0ropbox (GLA)IAsphelt Paving Company\Ralston Quarry\AutoCAD\Ralston Quarry 190116.dwg <br />Greg Lewicki And Associates <br />3375 W Powers Circle Phone (303)-346-5196 <br />Littleton, CO 80123 E -Mail - info@lewicki.biz <br />6200 <br />M <br />6350 <br />6250 <br />6150 <br />6050 <br />5950 <br />+ <br />O Y <br />See Detail A <br />00 cm M Nr r CD M to <br />Y r Y Y N N N N N N <br />Detail B <br />BI <br />See Detail B 6200 <br />8 8 8 8 8 8 8 8 8 8 <br />h- W d c M Y to m h C+D W N N N <br />Y r Y Y <br />6150 <br />-_ 6050 <br />5950 <br />8 8 8 �p 8 <br />N N N N N <br />D1 E <br />6450 6350 <br />6300 <br />6350 <br />See Detail A 6200 <br />� <br />See Det B s25o <br />x.100 <br />6150 <br />6000 <br />n <br />6054 $ o <br />5950 <br />8 g 8 g 8 g s 8 8 8 8 s 8 <br />n W W pY N M a u� W h W w o <br />Y Y Y Y �- r r Y r• Y N <br />Conceptual view of western slope variable <br />benches from along the A -A' profile <br />'41 C <br />M <br />6300 <br />6200 <br />6100 / <br />6000 p pp <br />8 O <br />o Y <br />3H:1 V backfilled slope ' �T <br />40' between the water tunnel and <br />171 <br />Water tunnel <br />40' between the water tunnel and the highwall <br />8pp a o + s 0 g o + s <br />M M Cpl M V' 4 It I qT ' b tN <br />C1 <br />68400 <br />_ _.. Detail A <br />6300 <br />3HAV backfilled slope <br />6200 <br />6� <br />. M <br />8 8S S <br />m v+ to c0 1- co w o N <br />I <br />See D ail A 6350 <br />6250 <br />6450 <br />Ig 6150 <br />.._ <br />6060 <br />5950 <br />A <br />to 3 <br />p <br />LEGEND <br />BOUNDARIES <br />DRMS Permit Boundary <br />CROSS SECTION TOPOGRAPHY <br />Baseline <br />Mining <br />Reclaimed <br />See Detail A <br />8 8 8 8 8 8 O 8 8 p Q 8 O O O 8 8 o 0 8 8 8 O 8 8 8 8 O O O 8 ' 8 Q O 8 O <br />+ }} .}} + + o+ + + + + + ++ ++ p+ + + } + + + + + + N M + 48 +� ++ + <br />M V' IA W 1, W Cn O r N M t1' 0 r.- W Os O .+- N co el` I W P_ e0 � p .y� � <br />V_ *' r r Y a- e^ SV N N N N N N N N N Ch M M M A M M M M M 'tl' V <br />0' 700' 1400' 2100' <br />Vegetation "island". See Detail C for example design. <br />Detail A - East Dipping Slope Information <br />This figure shows a Up to the top <br />g possible configuration of the slopes and le of the quarry <br />benches on the western slope of the quarry. According to 730 =Max overall slope angle <br />geotechnical analysis of the basalt and underlying shale, the Overall slope <br />bench slopes can vary between 40' and 80' tall, and the benches <br />themselves between 14' and 40' wide. Asphalt Paving Company <br />will excavate the slopes in a varying fashion to create aesthetically <br />pleasing benches. <br />Height of benches <br />will vary. <br />Slopes and heights based on geotechnical <br />analysis by Brierley in 2014 & 2015 <br />Benches of vary g <br />widths. <br />90° = Max bench cut angle <br />Benches are sloped <br />towards the wall <br />Down to the <br />quant' bottom <br />Detail B - West, South, & North Dipping Slope Information <br />Quarry floor <br />(A) <br />Top of slope <br />—(B) <br />The west, south, & north dipping slope limits are shown in the <br />table below. These limits were determined by Brierley and Assoc. <br />using Swedge analysis of the slopes at the Ralston Quarry <br />Detail C - Vegetation Island Example <br />�----- --Rangeland grasses <br />Topsoil -like See Exhibit F for <br />growth vegetation <br />medium _ specifics. <br />3-101 <br />Mined out basalt bench <br />(A) <br />(B) <br />Analysis <br />Slope Dip <br />Slope Angle <br />Hieght Limit <br />Lowest <br />Calculated <br />Direction (deg) <br />Limit (deg) <br />(ft) <br />Wedge FOS <br />West Dipping Overall <br />251 <br />90 <br />200 <br />1.37 <br />South Dipping Overall <br />180 <br />79 <br />400 <br />1.35 <br />North Dipping Overall <br />0 <br />186 <br />1 200 <br />1.38 <br />Detail C - Vegetation Island Example <br />�----- --Rangeland grasses <br />Topsoil -like See Exhibit F for <br />growth vegetation <br />medium _ specifics. <br />3-101 <br />Mined out basalt bench <br />