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ejtimated electric charge of 84 per kilowatt hour, and assuming <br />2 HP is equal to two kilowatts, the estimated increase in electrical <br />cost per dwelling unit for 15 minutes of pump operation per day <br />is 4¢ per day, or $1.20 per month. <br />An estimated construction cost for the grinder pump/manifolded <br />small force main alternative is included in the following section <br />' of this report. <br />1 <br />Cost Estimates <br />A. <br />Gravity Collection System/Conventional Pumping Station Alternative <br />(See Exhibit A) <br />1. Basis of unit price estimates: <br />average depth of 6' <br />a. 8„ 0 PVC Gravity sanitary sewer with <br />normal construction use $15.00/foot <br />add for dewater/rock <br />excavation (+) $25.00/foot add <br />for street, driveway <br />right-of- <br />and drainage restoration within <br />70' wide <br />way (+) $25.00/foot <br />Total = $65.00/ft <br />b. Standard manholes - $1200.00 each <br />(allowance for dewatering and rock <br />excavation is included <br />in gravity sewer unit price) <br />4" 0 service laterals from gravity <br />main to right-of-way <br />c. <br />line <br />normal construction use $250.00/lateral add for rock <br />unit <br />excavation (dewatering included <br />in gravity sewer <br />price) (+) $500.00 <br />Total = $750.00 each <br />Unit Cost Total Cost <br />Units <br />Description <br />I <br />18,710 LF 8110 PVC Gravity Sanitary Sewer <br />65.00 1,216,150 <br />1,200.00 84,000 <br />70 <br />Manholes <br />I <br />750.00 281,250 <br />375 <br />4"0 Service Laterals <br />2 <br />Conv. Pump Stations w/FM <br />50,000.00 100,000 <br />2 <br />Duplex Grinder Pump Stations <br />15,000.00 30,000 <br />5.00 5,350 <br />1070 <br />LF 21" 0 PVC Force Main <br />Sub -total ............................... <br />$1,716,750 <br />15% Contingencies ................• <br />• . . . $ 257+513 <br />1 <br />-9- <br />