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OPERATION AND MAINTENANCE COSTS <br /> Table 4 summarizes the annualized maintenance costs associated with operating LS #3. <br /> TABLE 4 - ESTIMATED ANNUALIZED OPERATION AND MAINTENANCE COSTS FOR LS #3 <br /> Item Cost Fre • uenc Annualized Cost <br /> Labor (daily check) _ $50 Weekly $2,600 <br /> Labor (intermittent call- <br /> outs) $100 Monthly $1,200 <br /> Electricity $15 Monthly $180 <br /> Vac -Truck $500 Annual $500 <br /> Misc. Repairs (Elec. <br /> Mech., etc.) $1,500 Annually $1,500 <br /> Pump Replacement $7,500 10 years $750 <br /> Complete Rehab $30,000 30 years $1,000 <br /> Total $7,730 <br /> RECOMMENDED SOLUTION <br /> From above, the total cost to construct the gravity sewer is $106,000. The net cost <br /> savings in maintenance for Option 2 is $7,730. This gives us a payback period of <br /> roughly 13.7 years. <br /> The payback period itself is short enough to justify the improvements. However, with the <br /> additional reliability of the system, which is difficult to quantify, gained through the <br /> improvements, we would recommend installing the new gravity sewer to eliminate LS #3. <br /> I I <br /> City of Centerville Project No: 193801520 <br /> 2013 Street and Utility Improvement Project �' $tdnte& Page 14 <br />