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TABLE 9 DESILVA GATES QUARRY TRUCK TRIP DISTRIBUTION FROM SR-I32/BIRD ROAD INTERSECTION Direction Distribution °lo Distribution % i Westbound on SR 132 to I-580 25% Northbound on 1-580 25% Eastbound on SR 132 to 1-5 75% Eastbound on SR 132 beyond I-5 15% Northbound on 1-5 500/6 _ Southbound on 1-5 10% Total 100% 1 100% YEAR 2007 BASE TRAFFIC VOLUMES The SR-132/Bird Road interchange is currently estimated to be under construction by the year 2007. The — County has indicated that this interchange and associated SR-132 highway improvements will need to be in-place before aggregate production in the Vernalis area can be expanded over current levels. Because aggregate production levels can not be increased without these improvements, the year 2007 traffic — forecasts and resulting traffic operations presented in the "Existing and Forecasted Study Area Traffic Volumes and Resulting Traffic Operations" technical memorandum (prepared in support of the interchange project)is assumed to represent short-term existing conditions. Year 2007 base traffic forecasts for SR-132 were developed using a yearly growth rate (provided by Caltrans) of 3.34-percent per year (compound growth). Based on information provided by the aggregate — producers, study area aggregate sites are estimated to produce up to 5,600,000 tons per year by or just after the year 2007. (The proposed project was not assumed to be in production by the year 2007 and the start-up production estimate of 500,000 tons was not included in the above year 2007 yearly production estimate.) Based on 250 production days per year and 25 tons of material per truck, Table 10 shows that this production would result in an average of 896 truck loads a day and 1,792 two-way truck trips per day. TABLE 10 VERNALIS AREA AGGREGATE PRODUCTION SITES YEAR 2007 BASE AVERAGE DAILY TRUCK TRIP GENERATION Average Daily Truck Average Yearly Average.Yearly Average Daily Loads Average Daily 2-Way Production Tons Production Days Production(Tuns) 25 Tons ruck) Truck Trips 5,600,000 250 22,400 896 1,792 _ The peak daily truck generation was estimated based on 40% more production occurring during peak production months with the results shown in Table 11. As shown in the table, 1,254 truck loads would be produced on a peak production day resulting in 2,508 two-way truck trips per day. TABLE I1 — VERNALIS AREA AGGREGATE PRODUCTION SITES YEAR 2007 BASE PEAK DAILY TRUCK TRIP GENERATION Average Daily Truck Average Yearly Loads Peak Daily Peak Daily Peak Daily 2-Way - Production(Tons) (25 Tons/Truck) Adjustment Factor Truck Loads Truck Trips 5,600.000 896 1.4 1 1,254 1 2,508 2"Draft DeSilva Gates Quarry Trafc&Circulation Analysis 16 October 2005 Jones&Stokes (R90577S002/25-4000-02)