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1 <br />TABLE 6-lA <br />COST-EFFECTIVENESS ANALYSIS <br />GRAVITY SYSTEM <br />Item <br />Gravity Sewers <br />Quantity <br />Cost <br />Gravity System: <br />8" Sewer Pipe <br />21,210 <br />l.f. <br />$ 848,400 <br />4" Laterals <br />12,936 <br />l.f. <br />194,096 <br />Service Connections <br />422 <br />105,500 <br />Manholes <br />75 <br />97,500 <br />Pumping Stations <br />6 <br />450,000 <br />Force Main, 4" <br />1,270 <br />l.f. <br />15,240 <br />Abandon Septic Tank <br />422 <br />101,280 <br />Subtotal <br />$1,811,966 <br />Pavement Repair <br />51,840 <br />sq. yd. <br />$ 648,000 <br />Miscellaneous: <br />Special Foundations, TV <br />Inspection, Performance <br />Bond Premium <br />$ 181,197 <br />0&M <br />Gravity Sewers: <br />$1,648/Mile/Year for 20 Years <br />Present Worth = $15,455/Mile�l� <br />x 21,210 l.f. $ 62,083 <br />Pumping Stations: <br />$12,823/mgd/Year for 20 Years�l� <br />Present Worth = $120,252/mgd x <br />0.05908 mgd $ 7,104 <br />Total $2,710,351 <br />(1) P/A, 8-5/8%, 20 Years = 9.3778 <br />