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Page 16 <br /> 6.4.5 EXHIBIT E - Reclamation Plan <br /> laterally and vertically. This process starts in the keyway and continues until the <br /> core reaches ground level. As the core is built the internal slopes are also brought <br /> up to achieve a 3:1 or shallower slope. The exact mix of material used to <br /> construct the core is determined at the time of construction based on the <br /> materials available. Moisture adjustments required have generally been minimal <br /> in prior experience and judgements on additional water are made during <br /> construction to achieve a moisture content typically in an optimum range of 2-4 <br /> percent. The internal slopes do not necessarily have to be clay materials, but can <br /> consist of pit run, overburden, shale or a mixture of these materials. The general <br /> approach to construction of the core and regrade of a typical wall at the <br /> extraction limit is shown in the Figure 1 below. <br /> Typical Liner and Regrade for Extraction Limit Wall — Final Reclamation <br /> Original ground surface Sequence <br /> Topsoil 1. In cycles <br /> • Install liner in 6"lifts <br /> Static Water Level Backfill to 3H 1V <br /> Liner 772. Replacetopsoil <br /> Regraded slope at 3H:iV <br /> g p <br /> Backfill material <br /> Unexcavated Perimeter Wall <br /> (slope 1.25H:1V <br /> 1 <br /> Keyway Bed rock <br /> Figure l: Typical Liner and Regrade for Extraction Limit Wall <br /> ZA Backfill Notice is included with this application as an Addendum at the back of <br /> Exhibit E - Reclamation Plan, to facilitate the fill of portions of the extracted lands <br /> for final end-use potentials beyond water storage, which may include residential, <br /> commercial or industrial structures or uses otherwise approved, now or in the <br /> future, by Weld County, Colorado; or a Colorado municipality, as applicable. The <br /> extent and nature of the water storage basin represents the maximum build-out <br /> respective of optimal extraction of commercial product and resulting final slopes. <br /> As part of reclamation, lands situated above the anticipated final water level of <br /> the completed basins, and within 10.0± feet below the anticipated final water <br /> Z Adequacy Item 28: Paragraph removed as proposed post mining land use is lined water storage. <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 />