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4.2 No River Crossing <br /> Due to the potential impact to the riparian corridor, water quality, and fisheries <br /> associated with the Mokelumne River, this alternative looks at developing the project <br /> without constructing a bridge across the Mokelumne River. Because of the location of <br /> the processing facility with respect to the proposed quarry area, relocation of the bridge <br /> would not significantly change the impacts associated with the project. The value of the <br /> riparian corridor would be approximately the same within the area of feasible relocation <br /> of the bridge, and water quality and fishery impacts would remain approximately the <br /> same. <br /> This alternative would eliminate the direct impact to the riparian corridor and <br /> would substantially reduce the potential for impact to water quality and fisheries. The <br /> most significant change associated with this alternative would be a negative impact on <br /> traffic. An alternative route for transporting aggregate from the quarry area to the <br /> processing facility would be required. This would likely involve construction of an <br /> access road from the quarry area to some point on Mackville Road. This would impact <br /> the traffic on Mackville Road and Jahant Road, and at the intersections of Jahant Road <br /> - Mackville Road and Jahant Road - Linn Road. An average of 95 one-way trips by <br /> 25-ton aggregate trucks would be added to these intersections and roadways per day. <br /> Because of existing right-of-ways, access from the quarry site to streets in <br /> Clements may not be the most feasible option under this alternative. It might be <br /> necessary to obtain an easement from the adjacent land owner to access Mackville Road <br /> directly from the quarry site. Because access from streets within Clements would <br /> require truck traffic to go through the town of Clements and past the fire station, this <br /> access may create a safety hazard for traffic and pedestrians, and may impact emergency <br /> equipment travel from the fire station. <br /> 4.3 Reduced Deoth of Excavation <br /> Because of the potential to encounter groundwater during excavation of <br /> aggregate, and the associated need to dispose of this water, this alternative evaluates a <br /> reduced depth of excavation at the quarry to avoid contacting the groundwater table. <br /> 107 <br />