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• 13 • <br />pond. That pond is rued as a water source for the mining operations under this •and the <br />former permitted reclamation permit. <br />The next unit to be mined, the northwest excavation unit, shall be the 8-acre northwest <br />portion of the site located north of the central access road and west of the central drainage <br />arroyo. Posting of the financial warranty for this unit shall be delayed until stripping and <br />mining for this unit is ready to begin. Topsoil in depths of 6 to 12 inches shall be fast <br />stripped and stockpiled along the north side of the central access road bordering along the <br />south edge of the northwest unit. Mining at grade level with the central access road shall <br />begin at the southeast comer, north of the central access road about 155 feet, and proceed <br />north and west at full depth of the resource (estimated at 12 to 15 feet deep) to the <br />northwest comer of this unit and rho permit area boundar}•. Excavation shall be <br />"dayligltted" to the central drainage arroyo along the east edge of this unit. Headwall <br />backslopes at the north and west boundaries shall be excavated at 3H:1 V for stable final <br />backslopes. Processing and stockpiling for material from this mining unit shall occur in the <br />area beriveen the excavation and the central access road. iviining of the northwest mining <br />unit is expected to take 2 to 3 years to complete. Reclamation of [he initial north-central <br />mining area east of the central drainage arroyo should be complete by the time the <br />Northwest mining unit is begun. Financial warranties will be appropriately reduced for <br />portions reclaimed or partially reclaimed. <br />Next to be excavated shall be the 8-acre "feedlot" area located irrtmediately north of the <br />Doing ditch, west of the central drainage arroyo, and south of the central access road. <br />Posting of the financial warranty for the feedlot ertraction unit shall be delayed until <br />excavation of the prior northwest mining unit is nearing completion. Extraction within <br />the feedlot unit is expected to last 2 to 3 years, depending upon market conditions. <br />Gravel deposits are expected to vary in depth from 8 to 12 feet, and are underlain by the <br />weathered silty claystones of the bforrison formation, as aze all of the alluvial gravel <br />deposits to be mined at this site. <br />Topsoil preciously stripped from the surface in depths of 6 to 12 inches shall be spread <br />evenly over the graded, worked-out surface of the formerly mined northwest unit to begin <br />reclamation of that unit. Financial warranty reduction shall follow completed stages of <br />reclamation. Excavation shall begin at the southeast comer of the stripped feedlot unit <br />and proceed northerly and westerly to the west boundary fence at full depth of the gravel <br />deposits. Excavation shall be "dayligttted" to the east at the central drainage arroyo, and <br />sloped 3H:1V at the north edge headwall along the central access road, and a[ the west <br />boundary headwall. Gravel mined shall be processed and stockpiled to the south in the <br />open azea east of the central drainage arroyo and north of the Doing irrigation ditch. As <br />mining progresses westerly the mined-out pit azea shall be utilized for processing and <br />stockpiling by progressively shifting process equipment westerly to remain close to the <br />extraction area. Completion of mining in this unit shall complete extraction operations for <br />this pemtit azea. No incidental nor secondary products are expected to be produced in <br />this sand and gravel extraction and production operation. <br />