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5) Hours of operation will be limited to 12 hours per day for 6 days per week. By necessity, the <br />operation will be very limited during the winter months. <br />• ~~ <br />6) Currently the operation has two main accesses, one north of the town of Alma (Access #6) and <br />one immediately south of the town (Access #1), as shown on Map C-2. Traffic for the future <br />operation is not expected to increase significantly from that experienced in the yeaz 2000. In 2003, <br />traffic is expected to be less due to the poor economy and increased competition. In 2003, gold <br />mining will force Access #1 to be disrupted. The traffic for this access will be moved to Access #4, <br />slightly south of Access #1. Most of the traffic of concern is gravel haul trucks, of which there will <br />be two types, semi-end dumps of 24 tons capacity and tandem trucks of 15 tons capacity. It is <br />expected that 60% of the tonnage will be hauled by the 15 ton tandems and 40% by the semi end <br />dumps. It is also expected that 50% of the traffic will move south of Alma and 50% will move north <br />of Alma. For all tmcks moving south, the south entrance will be used and the town will be avoided. <br />For north traffic, all attempts will be made to use the north access, but grade considerations at this <br />entrance will force some trucks to use the south entrance. <br />Using an average of 130,000 tons per yeaz of total aggregate/asphalt or concrete hauled from the <br />site in a year, the following traffic calculations aze given: <br />.'. <br />f~ <br />130,000 t 110 months activity = 13,000 tons per month. <br />13,000 tons/month /24 days per month = 541 tons/day <br />Since 60% of tommage will use 15 ton trucks and 40% will use 24 tons, the average is 18.6 tons. <br />Therefore, at 541 tons per day, this is 541118.6 = 291oads per day over 12 hours. <br />This is 2.41oaded trucks per how, and 2.4 empty trucks will return per hour. Other traffic such as <br />employees, sales, fuel, etc. will be estimated at 1.0 vehicles pet hour, therefore the total traffic per <br />hour is expected to be 2.4 x 2 = 4.8 +1(other traffic) = 5.8 vehicles per hour rounded to 6 vehicles <br />per hour. A maximum peak flow would be 7-8 vehicles per hour. <br />This is welt within CDOT limits for requirements of accel or decel lanes from the operation, even if <br />one entrance was used. Since this traffic will be equally split between Access #6 to the north and <br />either Access #1 or Access #4 to the south, the peak hourly traffic at either entrance would be 3-4 <br />vehicles per hour. <br />Alma Placer 7/03 <br />35 <br />