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Page 13 <br /> 6.4.12 EXHIBIT L - Reclamation Costs <br /> Exhibit L: Financial Warranty Map, shows Initial Extraction will begin in the yellow hatch <br /> area shown on the Exhibit L Map, comprising 16±acres. The direction of extraction will <br /> follow the perimeter of the extraction limits in order to establish the perimeter keyway for <br /> the 121.86± acre Center Section of Central Field. The perimeter extraction comprises <br /> approximately 70.21± acres and will leave an approximately 51.65± acre Core, that may <br /> be extracted as needed as keyway drainage capacity allows. <br /> The initial extraction area is bordered to the South adjacent to a near 800± foot section <br /> of oil and gas line that is pending removal; along with the two oil and gas wells, also <br /> pending removal (refer to Exhibit C for ownership details). Extraction will not occur within <br /> 10 feet of these lines, or 25 feet from the wells, as indicated in the setbacks detailed under <br /> Exhibit D: Extraction Plan. Below this gas line is an existing pond and well that will be <br /> used as a Settling Basin Area, containing at present a solitary settling basin and pump as <br /> a point of discharge of groundwater. This pond may be expanded or added to below this <br /> line. <br /> Perimeter Keyway Extraction will maintain a perimeter slope no steeper than 1.25H:IV, <br /> except for the perimeter shown in red along it's extraction limit, and respective toe where <br /> cut slopes will not exceed 2.001-1:IV; as indicated (refer to Exhibit S: Stability Analysis for <br /> additional information). At the toe of the cut perimeter slope is the keyway that runs <br /> below the extracted deposit of the basin, into the bedrock, which allows the subsurface <br /> waters to flow to the settling basin and discharge pumps necessary to keep the cut basin <br /> dry during a time of extraction and reclamation of the affected perimeter slopes. <br /> The keyway dimensions may vary more or less from 4± to 8± feet in depth and 4± to <br /> 16± feet in width. Extraction must be broad enough to allow equipment to safely <br /> approach the toe and excise the bed dimensions where the resulting channel is sufficient <br /> to convey the groundwaters to the settling basin for discharge. <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 /> 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 />