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Page 18 <br /> 6.4.12 EXHIBIT L - Reclamation Costs <br /> Assuming a mean depth of advancing cut of 1.25H:iV at the extraction limits of 40.0± <br /> feet depth: <br /> 2,180± lin.ft. (extraction limit) x 1,400.00± sq.ft. (required fill — Diagram 1, above) _ <br /> 113,037± LCY <br /> 113,037± LCY <br /> x $ 0.56± per LCY. <br /> $ 63,300.74±fill along an 2,180-foot extraction limit cut at 1.25HAV. <br /> Assuming a mean depth of advancing cut of 2:1V at the extraction limits of 40.0± feet <br /> depth: <br /> 4,020± lin.ft. (extraction limit) x 800.00± sq.ft. (required fill — Diagram 1, above) _ <br /> 119,111± LCY <br /> 119,111± LCY <br /> x $ 0.56± per LCY. <br /> $ 66,702.22 Sub Total-Grading to 3HAV along an 4,020-foot extraction limit cut at 2HAV <br /> $ 63,300.74 Sub Total-Grading to 3HAV along an 2,180-foot extraction limit cut at 1.25HAV. <br /> + $ 66,702.22 Sub Total-Grading to 3HAV along an 4,020-foot extraction limit cut at 2HAV. <br /> $130,002.96 Total — Initial Grading. <br /> Liner Installation: <br /> Raptor has made allowance for liner installation on the regraded slope. Assumptions are <br /> that a 4-foot-thick liner will be keyed into bedrock at the base of the regraded slope and <br /> up the slope to approximately 5-foot below the original surface elevation. The keyway <br /> dimensions in bedrock are assumed to be 4x4-foot. <br /> For the exterior walls at extraction limits, the regrade and liner installation is as described <br /> in Exhibit E. For interior walls around the core, for the purposes of financial warranty <br /> estimate, regrading is performed as described above, and then the liner will be installed. <br /> Typical liner installation as described previously in Exhibit E is shown in the following <br /> figure. The volume of liner material required will vary according to the slope of the wall <br /> the liner is installed on. The volume of liner material is conservatively estimated based <br /> on the perimeter length at the top of the liner. <br /> VARRA COMPANIES, INC. TWO RIVERS SAND GRAVEL AND RESERVOIR PROJECT MARCH 2O22 <br /> A REGULAR IMPACT[1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING&SAFETY <br /> OFFICE OF MINED LAND RECLAMATION <br />