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In addition to the existing practices of simply extracting and stockpiling the obsidian, there will be new <br /> product markets, and under the new plan the operator will need to crush some of the obsidian to <br /> uniform, specified sizes for the different end uses. This will require that a crusher is also onsite regularly. <br /> It has been observed that water is frequently impounded in the existing quarry. It is expected that this <br /> will continue to be the case, and dewatering will be necessary during all active quarry operations as the <br /> quarry is deepened. Water that is pumped from the quarry(which will be inherently free of sediment) <br /> will be routed to the sediment control/stormwater pond below the toe of the expanded staging area <br /> pad. From there it will either percolate back into the ground or be released into the stream system. <br /> Phase II: The same general steps may be implemented to define and excavate the other large obsidian <br /> deposit in the northern half of the expanded permit area. At this time no details of Phase II are known <br /> or presented in this conversion application, and no disturbance is of that area is being considered at this <br /> time. When the operator wishes to develop the northern deposit, the necessary application will be <br /> made to the DRMS. <br /> Additional Concerns—Security.Stormwater Control, Weed Control <br /> Throughout the life of this operation, erosion and presence of noxious weeds will continue to be <br /> monitored on all disturbed areas and addressed in a timely manner. <br /> The operator will install and maintain adequate stormwater controls for all affected areas of the site, <br /> including the quarry and operations pad areas, roadways, above-quarry slopes, topsoil stockpiles, and <br /> overburden cells. These controls may include earthen dams, culverts, ditches or diversions, and wattles <br /> or silt fence, as appropriate. See the Exhibit C maps for locations of the stormwater controls. <br /> The site will be kept secure by a single locked and gated entrance. The areas above the highwall will <br /> contain signage and/or physical barriers to deter accidental falls. <br /> Reclamation—Overburden and Topsoil Handling, Revegetation <br /> Native topsoil is present throughout most of the undisturbed portions of the expanded permit area, <br /> though depths vary. Topsoil that is stripped prior to disturbance will be placed in one of the following <br /> areas: on the permanent overburden disposal cells,on the outslope of the expanded staging and <br /> stockpile area, on the new surfaces of the sloped areas above the expanded highwall, or placed in <br /> stockpiles for later use in reclamation. Topsoil will be spread on reclaimed surfaces at a depth of 3 to 6 <br /> inches. All areas where topsoil is placed, including the topsoil stockpiles, will be seeded with the <br /> approved revegetation seed mix at the approved rates. (Please see the Exhibit E reclamation plan for <br /> revegetation details.) <br /> Conclusion of Mininp, <br /> At the conclusion of the operations, all areas and features of the site will be fully reclaimed. This means <br /> the quarry will have stable, benched highwalls; slopes will be topsoiled and revegetated (excluding in- <br /> quarry surfaces with exposed obsidian); earthen stormwater controls will remain as permanent <br /> structures; roadways will be either stabilized to remain as permanent, or reclaimed by ripping followed <br /> by topsoiling and seeding; all stockpiled topsoil will be spread and seeded; all product stockpiles will be <br /> removed; all equipment and supplies will be removed; and the benches and operations pad area will be <br /> ripped,topsoiled and seeded. See Exhibit E for reclamation plan details. <br />