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■ change the level of service on a state highway from an acceptable level(LOS D)to an unacceptable level(LOS E or worse),or ■ exacerbate conditions on a roadway or at an intersection that currently operates at an unacceptable level of service. _ TRANSPORTATION AND CIRCULATION IMPACTS — YEAR 2007 PLUS PROJECT CONDITIONS _ Impact 1 -Increase in Peak Hour Traffic Volumes on SR 132 East of I-5 The existing two-lane segment of SR-132 to the east of I-5 currently experiences Level of Service (LOS) "F" during the AM and PM peak hours and is projected to continue at this level through the year 2007 base and year 2007 plus project traffic conditions. The project is projected to contribute two (2) vehicle — trips to this segment of SR-132 during the AM peak hour and zero (0) vehicle trips during the PM peak hour. As such, the project would not be expected to exacerbate peak hour conditions on SR-132 and the project's impacts would be less than significant. Impact 2—Structural Damage to Existing County Roadways All project truck traffic would use Koster Road between the project's quarry entrance south to Blewett Road, Blewett Road between Koster Road and Bird Road, and Bird Road between Blewett Road and SR- 132. Based on the existing condition of Bird Road from south of Blewett Road north to SR-132 and based on the calculated year 2007 base condition T.I. values, the project would result in less than — significant impacts on Bird Road. Conversely, based on the existing condition of Koster Road from the project's entrance south to Blewett Road and on segments of Blewett Road between Koster Road and Bird Road, and based on the calculated year 2007 base condition T.I. values, the project would result in significant impacts which can be reduced to less than significant with mitigations. Mitigation Measure 2 _ Reconstruct Koster Road from the project's entrance south to Blewett Road to provide a 32-foot paved roadway surface with 50 feet of right of way according to the County's typical rural road sections. The County's"Road Inventory"indicates that Koster Road is built on six-inches of base material that has been — sealed over the years. Though the actual structural section is unknown at this time the existing structural section should be based, as a minimum, on a TI value of 9.0. T.I. values of 9.0 were also calculated for year 2007 base conditions and year 2007 plus project conditions. — Reconstruct Blewett Road segments that are less than the County's Waal road standard between Koster Road and Bird Road to provide a 32-foot paved roadway surface with 50 feet of right of way according to — the County's typical rural road sections. The County's "Road Inventory" indicates that Blewett Road is built on six-inches of base material that has been sealed over the years. Though the actual structural section is unknown at this time the existing structural section should be based, as a minimum, on a TI — value of 9.0. A T.I. value of 9.5 was calculated for year 2007 base conditions and a T.I. value of 10.0 was calculated for year 2007 plus project conditions. The recommended mitigations are those needed not only to mitigate the project's impacts but also to correct existing and year 2007 base roadway deficiencies. The project proponent will be required to contribute a fair share towards the implementation of the improvements. Level of Significance After Mitigation: Less-Than-Significant 2"d Draft DeSilva Gates Quarry Trafc&Circulation Analysis 50 October 2005 Jones&Stokes (R9057ISo02/25-4000-02)