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San Joaquin County Community Environmental Setting,Impacts,and Mitigation Measures Development Department Public Services and Utilities result in a substantial increase in demand for schools, libraries,or parks and recreational facilities(e.g.,a high-density residential subdivision)such that substantial physical deterioration of these services would occur. Further,the _ Project does not include construction or expansion of any of these services or facilities that could themselves have an impact on the environment. There would be no impact. No mitigation is required. Impact PUB-7: Increased Demand for Road Maintenance Facilities Resulting in Alteration or Need for Expansion of Road Maintenance Services (Less than Significant with Mitigation Incorporated) _ Quarry operations would result in an increase in the amount of traffic along the area road system. This traffic would consist of trucks hauling equipment and processed aggregate and return trips following delivery of materials to customers/job sites. The proposed haul routes are as follows: Incoming traffic would approach on Interstate 5 and exit onto Vernalis Road,traveling west, then travel south on Bird Road,east on Blewett Road, and north on Koster Road to the site entrance. Outgoing traffic would exit the site at the same point,turning south (right)on Koster Road,and following the same route in reverse. While some of the incoming trucks would be carrying equipment,most would be empty. Outbound trucks, fully loaded with processed aggregate,would therefore weigh an average of 20-25 tons more than when they entered the site. This — additional weight could accelerate the degradation of roads along the existing haul route. The impact would be greatest on county-maintained roads,especially Blewett, which is the longest portion of the haul route and contains two bridges, _ but Bird Road, SR 132 (Vemalis Road), and Interstate 5 would also experience increased loads. Based on the existing condition of Koster Road and the condition of segments of Blewett Road between Koster Road and Bird Road, the addition of project- related traffic could result in significant structural impacts on Koster Road and _ Blewett Road resulting in an increased demand for road maintenance services. Mitigation Measure TR-4, described in section 3.L, "Transportation and Traffic," requires the project to contribute a fair share towards the reconstruction of segments of Koster Road and Blewett Road. Implementation of Mitigation Measure TR4 would reduce these impacts to a less-than-significant level. Impact PUB-8: Increased Demand for Flood Control Resulting in Alteration or Need for Expansion of Flood Control Services (No Impact) The project area is relatively flat. The site drains generally to the northeastern portion of the site. The presence of the Delta-Mendota Canal and its accompanying levees, and the general absence of culverts along the perimeter of DeSilva Gates Quarry Project Draft Environmental Impact Report 3.K-10 AS 05105.05