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OPERATION AND MAINTENANCE COSTS • <br /> Table 7 summarizes the annualized maintenance costs associated with operating LS #3. <br /> TABLE 7 - 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 /> OTHER COSTS <br /> In the analysis of this situation, there are a number of related costs which are extremely <br /> difficult to accurately account for. <br /> Factors tipping the scale towards completing the project include: <br /> • The value of a more reliable gravity system and costs related to sewer back -up <br /> claims if there was to be such an event • <br /> • Aesthetic value of having the lift station removed from the neighborhood (this <br /> may include both visual and smell factors) <br /> • Costs associated with reconstruction of the new street if the sewer work is not <br /> done, the street work is, and then the sewer system fails (necessitating <br /> reconstruction) prior to the useful life of the street ending. <br /> Factors tipping the scale towards NOT completing the project include: <br /> • Costs related to the lift station not having served its full life expectancy <br /> • Costs associated with potential premature street deterioration due to disturbance <br /> of the underlying soils to install the sewer <br /> RECOMMENDED SOLUTION <br /> From above, the total cost to construct the gravity sewer is $143,000. The net cost <br /> savings in maintenance for Option 2 is $7,730. This gives us a payback period of <br /> roughly 18.5 years. <br /> The payback period, itself, is short enough to justify the improvements. However, with <br /> the additional reliability of the system, gained through the improvements, we would <br /> recommend installing the new gravity sewer to eliminate LS #3. <br /> • <br /> City of Centerville Project nille P No: 1 7 <br /> 2013 Street 5 f <br /> t and Utility Improvement Project C7 Page a 17 <br /> 48 <br />