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This alternative would result in elimination of the potential adverse impacts of impacting the groundwater table and the disposal of water from the excavation site. This alternative could also reduce the duration of the project activities because of the reduced volume of material excavated. This would reduce the duration of the impacts of the project including noise and visual impacts on the surrounding community. However, this alternative would not fully utilize the aggregate resources available at the site. This would require that these resources be offset by aggregate resources from other areas. Based on the projected aggregate supplies available in the Stockton-Lodi P-C region, this alternative could have a long term negative impact on the available aggregate resource supply for the area. 4.4 Alternative Quarry Site The feasibility of alternative sites are constrained by the distance of the quarry site from a processing facility, the market area for the aggregate, and the available resources within the market area. As stated in Section 2.5, the most significant factor affecting the cost of aggregate to the consumer is transportation. It is not economical (and therefore not feasible) to transport aggregate over large distances. The proposed site is located adjacent to an existing processing facility and the increased cost of transporting the raw aggregate is therefore minimal. Alternate sites, distant from the proposed site, would require transport to another processing facility or construction of a new processing facility. Because of the projection by CDMG (1985) that the proven aggregate reserves in the Stockton-Lodi P-C area will be exhausted by about the year 2004, it is assumed that any proven alternate quarry sites will be developed regardless of the whether or not the proposed project is constructed. The market area for aggregate from the proposed project is largely the Stockton- Lodi area. Because 80 percent of the aggregate used in this market comes from reserves just south of Tracy (Section 2.5), lost aggregate production from the proposed project could likely be made up in the short term by reserves from the Tracy District. However, areas east of San Joaquin County that are currently supplied by the Mokelumne River District, may not easily or economically be supplied by other resource areas. 108