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Page 14 <br /> 6.4.12 EXHIBIT L - Reclamation Costs <br /> Please Note: The graphic representation of the Perimeter Keyway Extraction and Core <br /> are idealized, and may vary in shape and size presented. Annual Reports will report on <br /> the nature and extent of affected lands and more properly reflect actual conditions on <br /> the ground in a given year of operations. <br /> UNITS OF DISTURBANCE: <br /> The life of the operation is based upon a base rate of extraction approximating 8.0±acres <br /> of disturbance in a given year. This time will pulse with the market and may average 8.0± <br /> acres, but could be faster or slower. Starting out, initial warranty necessary to cover the <br /> costs of reclamation for the extent of disturbance in a given year will also vary in time and <br /> circumstance, as the initial disturbance is generally less at the onset. So, a rate of <br /> disturbance can be estimated and the warranty adjusted incrementally with time and <br /> circumstance. <br /> Starting out in the initial projected 5 years of Operations, and incrementally thereafter, <br /> necessary warranty can be estimated and adjusted in incremental Units based upon the <br /> projected Life of the Operation. Essentially, a 30-35± year Life of Operations assumes a <br /> rate of extraction of approximately 8.0± acres per year. <br /> Considering the Mining-Regrading Schedule included as Table E-1 in Exhibit E, and the <br /> general development concept shown on Exhibit L: Financial Warranty Map, Raptor <br /> estimates for the initial 5-year period, development of an initial 40-acre excavation and <br /> development of a "Core" area in the Center Section of Central Field will result in creation <br /> of approximately 5,110-foot of external perimeter pit wall. No reclamation or lining is <br /> anticipated in the initial 5-year period. <br /> Raptor conservatively estimates for Financial Warranty purposes an approximately 50.50 <br /> split of wall excavated at 2H:1 V and 1.25:1 V slopes. <br /> DEWATERING: <br /> Raptor assumes that the pit would be in an unlined state and if operations had ceased, <br /> would recharge to static water level requiring dewatering of the pit to allow reclamation <br /> operations to be completed. <br /> 100 hp. 4,500 gal./min. pump x (up to) 3 pumps @ 24 hours/day <br /> Volumes per Tract: <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 MIING&SAFETY <br /> OFFICE OF MINED LAND RECLAMATION <br />