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A v ll 6350 li 6350 _ See Detail A -y 6250 szso '' - 3HaV backfilled sloe - - }, i 6150 See Detail A �nd mining 6i so f _ �- +Water 0'betweenthe watertunnel a _. r Antici ated Reservoir tunnelso5o p between the water tunnel and the highwall , s0r>o 5950 o t 8 q 8 8 S 8 S W q 8 8 S 8 8 m o 8 n S t S 8 m S S o S m o 8 S 8 S Y Y o & 8 + m ssso. I �'��II� �Y ellfl�i f I�fli II T 8 8 8 8 8 S s 8 r I �", I I ) I I it�i fil / I D B B I � 6200 6400 6400 e200 See Detail B - I sa5o a Detail B 6150 Detail A �t _ 6300 ,.� 6050 Anticipated Reservoir 6050 ezoo 8H:1V badkfilled slope am0 V t I 1 \ 6950 6950 0 0 0 0 0 0 o n m +m o I 6000 6000 D 6450 6450 6;350 _ 6350 6350 _ 5 6250 l 625o s�so - See Detail A Seg Detail B 6156 I �� See Detail A szso See Detail s 6160 I _ `� 6t60 61050 Anticipated Reservoir — I O o 0 0 0 0 0 0 Anticipated Reservoir 8050 1 8050 51950 I 5950 I - $ $ C s s O - I 6960 5950 — r r 0 0 00 00 g o 0 00 00 0 o O S it m gt � I 1� N 0' 700' 1400' -2100' i - I I - Conceptual view of western slope variable C Asphalt Paving Co. benches from along the A-A' profile Ralston Quarry CVegetation "island". See Detail C for example design. E A' Map C-4: Cross Sections Permit Number: M-1974-083 Mine Center Location: Latitude: 39°49'15.46"N Longitude: 105°14'30.35"W State:CO County:Jefferson Nearest Town:Arvada Section:4&8 Township:2&3 South Range: R 70 W ,r £ Variable bench heights:40-100' Major Watershed:Van Bibber Creek 0' 100, 200' 300, Units: Map Scale: ■Foot ❑ Meter • Legend Permit Boundary Baseline Topography Detail A - East Dipping Slope Information Detail B - West, South, & North Dipping Slope Information Detail C - Vegetation Island Example PP g P S pp� 9 P 9 p This figure shows a possible configuration of the slopes and of to the top - Mining Extents benches on the western slope of the quarry.According to 73° Max overall slope angle of the quarry geotechnical analysis of the basalt and underlying shale,the Overall slope Reclaimed Conditions bench slopes can vary between 40'and 80'tall,and the benches themselves between 14'and 40'wide.Asphalt Paving Company f/ Top of slope The west, south, & north dipping slope limits are shown in the will excavate the slopes in a varying fashion to create aesthetically table below. These limits were determined by Brierley and Assoc. pleasing benches. using Swedge analysis of the slopes at the Ralston Quarry 90°=Max bench.cut angle. (q ��® (B) ---.----,--Rangeland grasses Disturbed Boundary Height of benches Benches are sloped Topsoil-like See Exhibit F for APR 1 ., , �1 5 will vary. towards the wall growth vegetation �' 4h specifics. DIVISION OF RE _AMATION (A) IB) medium MININGANDSAFETY Benches of vary g Lowest widths. Analysis Slope Dip Slope Angle Hieght Limit Calculated 3 - 10' Direction (deg) Limit (deg) (tt) Wedge FOS 1 Map Georeferencing Information: Down to the 1 Datum: ❑NAD27 ■ NAD83 ❑WGS84 ❑ None(Local) quarry bottom West Dipping Overall 251 90 200 1.37 Mapping State Plane: ■Center Zone❑ North Zone ❑South Zone ❑Other: South Dipping Overall 180 79 400 1.35 Mined out basalt bench Projection: UTM: ❑Zone 12 ❑ Zone 13 ❑Zone 14 ❑ Other: PP 9 I t. Local System(Name): North Dipping Overall 0 86 200 1.38 b •°"""°°° �^ File Name:X:\Asphalt Paving Company\Ralston Quarry\AutoCAD\Ralston Quarry 040915.2.dw GO\sa n 9 is Date Plotted: 4!9l15 } - i l I"l�- Quarry floor T 715 Slopes and heights based on geotechnical analysis by Brierley in 2014 & 2015 TF ° r° sloN E�° Greg Lewicki And Associates Designed: Revisions Bv I Date Notes: Drawn: 11541 Warrington Court Phone(303)-346-5196 Parker,CO USA 80138 E-Mail-info@lewicki.biz Checked: Approved: