2019-03-19_REVISION - M1974086 (9)

Home Browse Search

Lam., p' 500' 1000' " (T) Q�) tam z $ s 71 � LEGEND BOUNDARIES DRMS Permit Boundary 6350 CROSS SECTION TOPOGRAPHIC' See D it A Baseline Mining Reclaimed - 6350 __ �.... 6250 3H:1V backfilled slope 6250 6150 _...._� �._r. 40' between the water tunnel and mini See Detail A 6150Water tunnel 6050 _. 40n'between the water tunnelandthe highwall 6050 _ w�.�_ 5950 -- O O O O o 0dO O 0 0 0 0 O O Oc O O O OO O O O O O O O O O a + t + + P + °n n O 0 000 0 } O } + y to O n t '+ } v v °n o o C Go CD 0 5950 0 ON�tL0 to + M O + N N 0)C + + + + + + + + N C%1 04 co p + 0) 04 W N N O C%1 to B# C C1 E3 6400 6M 6400 6200 See See Detail B Detail A See Detail B , 6150 6300 6300-_ _ __ __ 3H:1 V backfilled scope 6050 6200 6050 s2oo � 5950 5950 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 a 6100 6100 0 0 0 O O O O O 0 O O O O O t + + t + co O O r' N N N N N N _ o O O O O + + + + + O + N r r' r 'r N N ,� 4 M 'd' O m ti O O r 6000 O 6000 p O O O O O p OO O O O O O O 0 O} - - - + t t - t t- O N CF) d' p r N to It to m P. O O D D' E 6450 6350 6450 6300 See Detail A 6M- -- - - ---._. 6350 6200 See Detail A 6250 6250 + See De B 6100 6150 6150 6000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 p O p p O O O O O O O O O O O O } + C N M d, t j M co O - - 0 O O O _ O O O O O O O O O O O a+0 + N N N N N N N N c9 c4 [O M C7 lh C7 6050 0 et- N co `Q' - I j t0 co 01 O ` N r r N 6050 5950 5950 0 0 0 0 0 0 0 0 0 $ 0 0 0 0 0 0 in 0 + O 0 0 0 0 0 0 0 0 0 0 0+ + + + + + r co oco co M 0 O N Pi Conceptual) view of western slope variable benches from along the A - A' profile r mr� C 0° 700' 1400' 2100' Vegetation "island". See Detail C for example desiign. Detail A - East Dipping Slope Information Up to the top This figure shows a possible configuration of the slopes and 73' = Max overall slope angle of the quant' benches on the westem slope of the quarry. According to Overall slope wall geotechnical analysis of the basalt and underlying shale, the bench slopes can vary, between 40' and 80' tall, and the benches themselves between 14' and 40' wide. Asphalt Paving Company will excavate the slopes in a varying fashion to create aesthetically pleasing benches. \ Detail B - West, South, & North Dipping Slope Information 900 = Max bench cut angle I (A) Height of benches Benches are sloped v towards the wall will vary. Benches of vary g widths. Slopes and heights based on geotechnical { analysis by Brierley in 2014 & 2015 t Down to the quarry bottom Quarry floor Top of slope (B) The west, south, & north dipping slope limits are shown in the table below. These limits were determined by Brierley and Assoc. using Swedge analysis of the slopes at the Ralston Quarry Detail C - Vegetation Island Example -Rangeland grasses Topsoil -like See Exhibit F for �- � � '��- � vegetation growth specifics. medium 3 - 10' ined out basalt bench (A) Analysis Slope Dip Direction (deg) Slope Angle Limit (deg) Hiegtnt Limit Qom) Lowest Calculated Wedge FOS West Dipping Overall 251 90 200 1.37 South Dipping Overall 180 79 400 1.35 North Dipping Overall 0 86 200 1.38 Detail C - Vegetation Island Example -Rangeland grasses Topsoil -like See Exhibit F for �- � � '��- � vegetation growth specifics. medium 3 - 10' ined out basalt bench