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San Joaquin County Community Executive Summary Development Department a (referred to as maximum design depth). The quant'slopes would have 15-foot- wide benches every 30 vertical feet. Site Reclamation and Post-Reclamation Use Reclamation would occur in stages,as described above under"Mining Plan" (Figure 2-7 in Chapter 2,"Project Description'). With final reclamation of the site, a total of 165 acres would be reclaimed to agricultural use(Figure 2-6 in Chapter 2, "Project Description'). The reclaimed slopes would be 1.5H:IV and would have 15-foot-wide benches every 30 vertical feet. The water storage basin would be approximately 90 feet deep and would have side slopes of 1.5H:1 V and a I%grade sloped floor. The road to the basin would remain to provide access for agricultural operations. Equipment associated with mining would be removed from the site. Haul roads that would not be used after project completion and other heavily compacted areas such as the plant site would be ripped to at least 12 inches. The site would be graded and topsoil reapplied at depths that emulate natural conditions at the site,to an average depth of 18 inches. Overburden and waste sand and fines would be used in reclamation to develop 1.5:1 side slopes along the perimeters of the excavated areas. No revegetation would be conducted because the majority of the site would be returned to active agricultural cultivation(e.g.vine,row,or tree crops). Reclaimed areas will be returned to a fertility level similar to the existing crops grown on the property. Success of reclaimed agricultural operations will be evaluated by a qualified agricultural consultant,and will be considered to meet acceptable fertility level when 80%of trees have success of establishment. If alternating row crops are planted, then success will be met when such row crops produce at least 80%product,as compared to surrounding properties on a per- acre basis. Side slopes are to be reclaimed. The South Pit would be backfilled to its pre-mining elevation, and Stages I and II of the North Pit would be backfilled to 15 feet above groundwater level (approximately 60 feet AMSL). Stage III of the North Pit is proposed to be 6. backfilled to groundwater level and used as an approximately 12-acre agricultural pond. However, if less mining occurs than planned,more fines than expected are generated during mining,or a substantial amount of fill is brought to the site as `- backhaul from job sites,no pond would be left. Instead,the South Pit would be backfilled to existing topography and Stage III of the North Pit would be backfilled to a uniform grade 15 feet above groundwater, consistent with Stages I and II of the North Pit. The Applicant would bear all costs of reclaiming the site, as required by the Surface Mining and Reclamation Act(SMARA). DeSilva Gates Quarry Project Draft Environmental Impact Report ES-5 J85 05105.05