Laserfiche WebLink
Page 116 <br /> 6.4.4 EXHIBIT D — Extraction Plan <br /> 'Exhibit L: Financial Warranty Map, shows Initial Extraction proposed to begin <br /> in the yellow hatch area shown on the Exhibit L Map, comprising 16.26± acre. <br /> The direction of extraction will follow the perimeter of the extraction limits <br /> over approximately 75.45± acres in order to establish the perimeter keyway <br /> (dewatering trench5) for the 127.10± acre Center Section of Central Field. The <br /> perimeter extraction will leave a 51.65± acre Core, that may be extracted as <br /> needed as keyway drainage capacity allows. The Initial Extraction area is <br /> practical as it has no encumbrances and is adjacent to the existing pond. <br /> The initial extraction area is bordered to the South along a near 800± foot <br /> section of oil and gas line that is pending removal; along with the two oil and <br /> gas wells, also pending removal (refer to Exhibit C for ownership details). If <br /> or while this infrastructure is still in place, extraction will not occur within 10 <br /> feet of these lines, or 25 feet from the wells, as indicated in the setbacks <br /> detailed below. 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 <br /> and pump as a point of discharge of groundwater. This pond may be <br /> expanded or added to below this line and may then be extracted itself once <br /> discharge is discontinued for Central Field Operations. <br /> Perimeter Keyway Extraction will maintain a perimeter slope no steeper than <br /> 1.25H:IV, except for the perimeter shown in red along it's extraction limit, <br /> and respective toe where cut slopes will not exceed 2.00H:1V; as indicated <br /> (refer to Exhibit S: Stability Analysis for additional information). At the toe of <br /> the cut perimeter slope is the keyway that runs below the extracted deposit of <br /> the basin, into the bedrock, which allows the subsurface waters to flow to the <br /> settling basin and discharge pumps necessary to keep the cut basin dry <br /> 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 <br /> and 4± to 16± f eet in width. Extraction must be broad enough to allow <br /> equipment to safely approach the toe and excise the bed dimensions where <br /> the resulting channel is sufficient to convey the groundwaters to the settling <br /> basin for discharge. <br /> Please Note: The graphic representation of the Perimeter Keyway Extraction <br /> and Core are idealized, and may vary in shape, size, and location presented. <br /> Annual Reports will report on the nature and extent of affected lands and <br /> more properly reflect actual conditions on the ground in a given year of <br /> operations. <br /> 4 Adequacy Item 17: Modified from first adequacy response to better define the mining and reclamation plan and <br /> reference a schedule in Exhibit E. <br /> s Adequacy Item 15: Keyway clarification <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 />