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San Joaquin County Community Executive Summary Development Department — completed within 6-12 months of exhaustion of reserves or expiration of the permit. ■ Production: Provide for a total permitted production level of up to 20 million cubic yards (30 million tons);with sequencing broken into different mining stages depending on geology,terrain,current technological capabilities,and the intent to incorporate the visual screening provided by the existing terrain. ■ Employment: Provide on-site staffing of 5-10 employees through the production life of the mine. Two shifts could be employed when special night operations are needed and three to five workers would be added to the labor force. ■ Site conservation: Avoid sensitive natural resources; minimize aesthetic impacts through site design, staging, and concurrent reclamation; and implement reclamation concurrently with mining operations throughout the life of the mine to return the site to a productive post-mining agricultural land use. Lead Agency Project Objectives The County has not identified any separate goals or objectives for the project in addition to those identified by the Applicant and stated above. J Mining Plan The Applicant proposes to dry mine the site (referred to as Dry Pit Operations) and dewater the pit as described below. However,based on the actual amount of water encountered,the Applicant may elect to wet mine the site(referred to as Wet Pit Operations). Mining operations are expected to encounter groundwater at depths of approximately 75 feet above mean sea level(AMSL). As described in the quarry excavation application,Wet Pit operations may be carried out in addition or in place of Dry Pit operations at the discretion of the Applicant,and for this reason,this FIR assesses the impacts of both mining methods. Mining operations would involve sequential excavation and backfilling of mining pits. Backfilling is part of the Reclamation Plan,described in more detail below. — Mining stages and reclamation sequencing for the Dry Pit and Wet Pit Operation methods are shown on Figure 2-6 in Chapter 2,"Project Description." Under either operation up to 155 acres of the site may be mined,depending on geologic factors encountered during excavation and mining economics. Excavation and reclamation would occur in two pit areas,the South Pit (approximately 40 acres) and the North Pit(approximately 115 acres). The North Pit area would be comprised of two separately excavated pits that would be mined in three sequential stages. The two pits in the North Pit area would be physically separated by a roadway easement. Quarry slopes of excavated pits would be 0.75H:1 V and would have a maximum depth of about 175 feet DeSilva Gates Quarry Project Draft Environmental Impact Report ES-0 J85 05105.05