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The project would generate additional vehicle trips,primarily haul truck traffic, on project area roadways. The added traffic would affect traffic operating conditions. (Final EIR,p. 4-21.) Significance Before Mitigation: Potentially Significant. Facts: Vehicle trips generated by haul trucks, employee vehicles, and delivery vehicles will add traffic to area roadways and affect traffic levels of service at area intersections. See Final EIR, pp. 4-21 to 4-30. Mitigation Measures: Mitigation Measure 4.4.1 a: Although the intersection of Koster and Blewett Roads is anticipated to operate at acceptable levels of service with project implementation, the intersection will require widening to accommodate truck turning movements if access to the mining site is provided via Koster Road. Additionally, all-way stop control will be required to mitigate this intersection's cumulative year 2025 unacceptable levels of service impacts from Haul Route 1. If the County allows the use of this site access, the project sponsor would fund its fair share of this measure as a condition of approval of the project. Peters Engineering Group conducted a Fair- Share Percentage analysis as part of its Traffic Impact Study for this project. The fair share percentage provides a measure of the project's share of the anticipated future improvements to the transportation network. This analysis is contained in Final EIR, Appendix A. (Final EIR,p. 4-29.) Mitigation Measure 4.4.1b: As a condition of approval, the applicant will be required to contribute an equitable share of the cost of the construction of a new interchange at SR 132 and Bird Road. Applicant's payment of its equitable share will be made through the creation of a CFD according to the County's June 6, 2008 Acceptance of Petition from the Vernalis Producers Group to Form a Community Facilities District, or other similar financing mechanism. Caltrans has approved a Project Study Report for an interchange to replace the existing intersection. The proposed interchange is expected to mitigate the cumulative impacts to the intersection(for Haul Route 1). (Final EIR,p. 4-29.) Mitigation Measure 4.4.1c: As a condition of approval, the applicant will be required to contribute an equitable share of the cost of installing new traffic signals and construction of a separate southbound left-tum lane and protected left-tum phasing at the intersection of Bird Road and Blewett Road. Traffic signal warrants must be satisfied at this intersection for implementation of this measure. These proposed improvements are expected to mitigate the cumulative impacts to the intersection(for Haul Route 1). (Final EIR, p. 4-29.) Mitigation Measure 4.4.1 d: The proposed project will be conditioned to operate at a maximum annual production of 1.33 million tons while Haul Route 3 is in operation. If the proposed project is limited to 1.33 million tons per year, the near-term with-Project level of service will be C and no significant impacts will occur. To mitigate significant impacts in the cumulative conditions, the proposed Project may be conditioned to eliminate Haul Road 3 after the pending construction of the Bird Road/SR 132 interchange, at which time only Haul Route 1 would be allowable (Final EIR, pp. 4-29 to 4-30.) Mitigation Measure 4.4.1e: In order to address safety concerns associated with Haul Route 3 13