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Exhibit L <br /> Page <br /> o Concrete and/or asphaltic surfaced roadways demolition and placement/consolidation within pit <br /> void immediately adjacent to plant area,followed by ripping/scarification of sub-base. <br /> o Regrade and recontouring of entire plant and facilities area(107 acres)to approximate original <br /> contours and drainage conditions. <br /> o Placement of growth medium and revegetation across full extent(107 acres)of the reclaimed area. <br /> o Placement of silt fencing and/or other erosion controls at areas to be identified upon completion of <br /> reclamation activities. <br /> • Terminal Mine Pit,Plant Waste Pile,and Remaining Haul Roads <br /> To include the following: <br /> o Terminal pit closure(on assumed basis of a 63.3-acre terminal pit maximum areal extent)via <br /> placement of growth medium(in part)sourced from the TS-I long-term growth medium stockpile. <br /> o Final slope reduction(to 5H:1 V)of plant waste stockpile areas not previously reclaimed followed <br /> by growth medium placement. <br /> o Ripping and scarification of remaining portions of Southwest and Southeast Haul Roads, <br /> respectively,followed by growth medium placement. <br /> o Revegetation of(all of the above)areas,to include drill seeding,mulch application,and <br /> crimping/discing. <br /> o Placement of silt fencing and/or other erosion controls at areas to be identified upon completion of <br /> reclamation activities <br /> • Revegetation Monitoring and Maintenance Period(5 Years) <br /> To include the following: <br /> o For all areas associated with final site closure, CSC will initiate a five-year post-closure(PC) <br /> monitoring and maintenance period. CSC has included in Year 1 (i.e.,PC-1)those areas that remain <br /> subject to(but are already in)the respective five-year period(s). Thus,Year 1 of the post-closure <br /> period will address a final reclamation obligation totaling approximately 503 acres,to include the <br /> 107-acre plant/facilities area and 68.7-acre terminal pit,along with those areas <br /> reclaimed/revegetated over the preceding four(4)years.,i.e., Year 19(77.5 acres),Year 18(86.8 <br /> acres), Year 17(90.1 acres)and Year 16(92.0 acres),respectively. <br /> Each year thereafter,the oldest reclaimed mine block will drop off the five-year monitoring and <br /> maintenance period roster;thus,the assumed(approximate)acreages for the successive post- <br /> closure years are: (PC-2)=411 acres; (PC-3)=322.5 acres;(PC-4)=242.6 acres;(PC-5)= 175.1 <br /> acres. CSC has assumed a per-acre cost for this five-year monitoring and maintenance period and <br /> applied same on a descending scale,on the basis that maintenance requirements will likely decrease <br /> with each passing year. <br /> Colorado Sand Company II, LLC <br /> Kersey Mine 112(C)Reclamation Permit Application <br /> June 7,2024 <br />