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3.6 Proposed Project Components 3.6.4 Reclamation The Applicant and its consultants have prepared a reclamation plan for the RMC Pacific Vernalis ` Quarry, dated October 2003, pursuant to the requirements of the Surface Mining and Reclamation Act(SMARA)and the County's mining ordinance. Phasing Reclamation would be completed within two years after a phase of mining is completed. Upon termination of mining activities at the quarry,the plant, office,and other structures and objects would be removed and the area graded and leveled. The processing plant, structures, and all of the processing equipment would be removed from the site. Buildings(offices, shops,etc.) would L be demolished and removed from the site. All concrete foundations would be excavated and removed and underground electrical conduit and water pipelines would be excavated, removed, and properly disposed of at an off-site location. Electrical equipment,transformers,power poles, and power lines would all be removed from the site. The two leased parcels(Phase II and III areas) would be reclaimed first and returned to agricultural use. All other areas,except the silt ponds would be mined and reclaimed back to agriculture use to the elevations shown on the Reclamation Plan. All silt ponds would be stabilized and capped with overburden to the same approximate elevation as Blewett Road and INN would be returned to agricultural use. In Phase IX, the silt ponds would be capped,the processing plant would be removed,and the plant site would be mined. At that time,a portable plant would be located on the capped silt pond(Phase IVA area) located north of the original plant site. "r Use of Top Soil and Overburden Once mining activities are complete, the site would be reclaimed to open space and agricultural uses. The slopes would be backfilled to 2:1 and hydroseeded. Excess topsoil would be placed at ` the bottom of the pits to enhance vegetative growth. The current depth of the topsoil and overburden over the project site averages five feet. The silt ponds would be capped to match the adjacent elevations.The other mined out pits would be 70 to 120 feet below the surface. The plant, office,and other structures and objects would be removed and areas graded smooth. Refer to Figure 3-6 and Figure 3-7 for the proposed reclamation plan (Reclamation Plan Option 1 and Reclamation Plan Option 2). V Topsoil would be distributed, watered, and graded to an approximately 6-to 9-inch thickness. After placement and grading are complete, the material would be track rolled(a method for the V compaction of soil on a slope to increase slope stability and establishment of vegetation) to prevent erosion and enhance seeding. The total volume of the topsoil would be 797,390 cubic yards. The final thickness would be less than the original thickness due to shrinkage, loss in handling, and intermixing.The total volume of overburden(other than topsoil) would be 6,644,917 cubic yards. It is estimated that the interbedded clays would be 14,730,000 cubic yards. The overburden and clays together total 21,374,917 cubic yards. Approximately 7.2 million cubic r RMC Pacific Vernalis Quarry Mining and Reclamation Project 3-25 ESA 1203015 Draft Environmental Impact Report May 2006