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E 6.0 PROJECT ALTERNATIVES x \ 6.1 No Project If this Conditional Use Permit application is denied, 'the f- quarrying operation would continue only to its limit of 110 acres of permitted excavation. As mineable reserves remain, there could be continued pressures for quarry development. No signifi- �» cant unmitigatable adverse environmental impacts or adverse changes have been identified in this report that would be avoided or mitigated by this alternative. Denial of this application would result in loss of mineral reserves available for the benew- r fit of the public of San Joaquin County. 6.2 Alternative Design: Smaller Scale Operation A In this alternative, a Conditional Use Permit for a smaller- scale operation would be applied for. The principle effects of this alternative would be a reduction in the duration of the project, and a reduction in the total volume of material to be processed. Somewhat fewer surface acres of the lease holding would be disrupted by quarrying. However, quarrying operations } would occur anyway in the areas of highest quality reserves. Any potentially significant environmental effects identified in this report would also occur with the smaller-scale operation. As mineable reserves remain, there could be continued pressures for quarry development. KRC Aggregate, Inc. needs to know that they can excavate their reserves of sand and gravel for the San Joa- quin County area for the next 20-25 years. No significant unmi- tigatable adverse environmental effects would be avoided or miti- gated by this alternative. 6.3 Alternative Design: 12:2 or 1: 1 Ratio Pit Slope Walls An alternative' design would involve the excavation of the g open pit with 1Z: 1 or 1: 1 ratio pit slope walls. This alternative would allow the processing of those additional aggregate reserves that would otherwise be left in-situ in the pit walls for long-term slope stability as required by county i" ordinance. Excavation of this material would require a variance { r from the County Planning Department, and would be addressed by the Reclamation Plan. A Slope Stability Report would be re- quired. Final pit slope walls would have to be restored to a 2: 1 ratio. KRC Aggregate, Inc. feels that the amount of sand and gravel reserves lost to the 12: 1 slope versus the 1: 1 slope are insignificant and will not be considered as an option at this time. t i i ( KRC Aggregate, Inc. - 1 - April 1, 1994