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Stioles, Minin,'vResource Mine Phase Schedule <br />located <br />!i <br />i <br />±50 Acres <br />Land <br />located <br />olway <br />= <br />±107 Acres <br />Stioles, Minin,'vResource Mine Phase Schedule <br />Mine Excavation and B c f4 <br />V1\� <br />Stripe, stockpile and seed <br />Mine <br />E <br />L <br />Backfill <br />t Mine <br />Mine <br />Mine Phase <br />topsail e'rk� u den stock <br />sand <br />°��ir� <br />clean inert <br />�����ti�ri to <br />DESCRIPTION Seg Schedule Graph <br />O <br />Affectedgravel Affected ,area <br />f <br />Backfill <br />inert: Bac fill <br />Phase <br />^ <br />material�t�r�l <br />�C <br />Acre <br />O <br />O <br />!F, <br />oO <br />Complete <br />ca <br />L <br />ru <br />L <br />Start Year <br />Complete '1 Year <br />Yr <br />Commercial Phase I (West Parcel HI & <br />O <br />^ <br />CO <br />S c fill washplantpond system. <br />O <br />2.4 <br />2023 <br />2023 <br />2045 <br />2045 <br />NA <br />Mine phase 2 (West Survey Parcel !l <br />2 <br />21.8 <br />2023 <br />2029 <br />2024 <br />2032 <br />3.00 <br />Mine Phase 3 (Muddle Survey `arcel 1) <br />3 <br />24.6 <br />2026 <br />2032 <br />2027 <br />2036 <br />.0 <br />Mine Phase 4 ( East Survey parcel B 1 <br />.. <br />� �• <br />03 <br />��� <br />,. <br />Mire phase 5 (East Survey Parcel 11) <br />5 <br />15.2 <br />20`40 <br />2044 <br />2041 <br />2048 <br />4,00 <br />Mine and Backfill Surface Area (Acres) <br />87, 1.6 <br />Commercial Area including buffers & settling <br />excluding settling ponds (Acres) <br />'line buffers excluding commercial buffers (Acres) <br />25,7 <br />r.#.1 <br />r0 :9 <br />1) City o Right of 120 mining <br />rea I is not includedaffected <br />Total yi. i� Affected <br />,.E i Area <br />. e q..excluding �i City i Evans avenue <br />�. Acres. i 7 <br />settling;3) Phase 1 - Commercial reclamation bond should be held for duration of the mining project. The only excavation 'in: <br />phase 1 is striping and stockpiling of some top soil, excavation of the wash plant ponds 12.4 Acres., and wash <br />plant ditches. other # will occur inPhase 1. Total Commercial <br />.r * r; q. (Phase <br />acres <br />e a <br />includes the ditch buffer, settling ponds, truck scales, office, asphalt hot plant and aggregate wash plant. <br />1, E• phase commercial <br />ra area <br />reclamation bond should e maintained <br />for ,• duration e <br />project. <br />r 4 <br />backfill,:acres settling pond excavation is not included in the 25 acre maximum excavation and backfill commitment. <br />1,5) For the mining and f • <br />backfill operation disturbance area is 25 acres. Two phases of mining and backfill may be disturbed at the same time, <br />*, .c e total i <br />Permit and/or Property Boundary <br />PRIOR TO <br />MINING <br />INITIAL MINE <br />DEVELOPMENT <br />MIINING OF <br />MINE BLOCK <br />FINAL MINE <br />BLOCK EXCAVATION <br />Water draw <br />down <br />f Topsoil ±1ft., Overburden ±2 ft., dry surface aggregate materials ±4 ft. <br />Ground water at ±6 ft. below the ground surface. <br />E Wet aggregate material ±36 ft. <br />Shale subgrade. <br />No dewatering trenches will be installed during the initial stripping and mining operations. <br />The dewatering trenches will be installed when the giround <br />water is encountered during the initial aggregate material <br />mining operation. <br />Future Finished Mine Slope <br />1 4 , to backfilled against during the <br />1 1 3 reclamation phase. <br />.mak, <br />Finished Mine Slope may <br />vary from 3:1 to 1:1 slope <br />depending on actual soil <br />conditions encountered <br />during mining. <br />Trench to dewater the aggregate deposit for mining <br />is to be located on all sides of each block. <br />Dry aggregate material for mining. <br />Wet aggregate material to be dewatered and dried <br />for next lift of the mining operation. <br />Final trench prior to <br />start of reclamation <br />backfill operation. <br />Final lift of aggregate material. <br />Trench excavated below aggregate material <br />into the shale subgrade. <br />- Dewatering trenches will be graded to the pump <br />basin located at the N.E. corner of each mine block. <br />- Pumps will move the mine block water to the <br />N. mine ditch which will serve all of the mine phases <br />and mine blocks. <br />- The N. mine ditch will carry the mine discharge <br />water to the point of discharge to the South Platte River <br />located at the N.E. corner of the property. <br />Dry material is to be mined in 6 to 12 ft. lifts; <br />or 3 to 6 lifts per mining block. <br />�filtv1i�t� =�' <br />Z <br />11 <br />O <br />o <br />\ 00 <br />ip O Ln <br />�70Ln <br />V (Lo In <br />.� O 00 <br />O 0) <br />�U00 <br />\C ^ <br />ro O <br />0 O <br />O (V M <br />c — <br />QO=� <br />,-I <br />NLU <br />W <br />= N <br />N <br />V1\� <br />a� <br />E <br />L <br />4 - <br />fu <br />a <br />U) <br />C <br />-O <br />O <br />f <br />O <br />C <br />E <br />fu <br />^ <br />® <br />�C <br />Q <br />O <br />O <br />!F, <br />oO <br />4-J <br />fu <br />E <br />ca <br />L <br />ru <br />L <br />Ufu <br />4-J <br />lL <br />0 <br />O <br />^ <br />CO <br />Imo <br />O <br />U <br />�`u <br />I� <br />> <br />6 <br />C <br />UI <br />d1 <br />,-I <br />NLU <br />W <br />= N <br />N <br />V1\� <br />LU <br />N <br />U <br />L <br />Z3 <br />O^^ <br />V) <br />W <br />l� <br />C <br />•E <br />W <br />n � <br />O a� <br />W Z <br />a U) <br />r7 <br />of 4 <br />