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8. Division and Garfield Elevated Tanks; <br /> 9. New Elevated Tank; <br /> 10.New Booster Pumping Station; and <br /> 11. Vulcan Gravel Pit Supplementa.l Water Supply. <br /> If existing fixed assets do not include sufficient cost detail for treatment facilities, <br /> construction cost invoices, engineer estimates and/or other relevant cost reports will be <br /> requested as a basis to allocate known costs to component parts such as basins, structures <br /> and equipment for a clarifier or disinfection facility. If construction invoices or other <br /> detailed cost estimates are not available, Engineer will use detailed cost information from <br /> similar systems as a basis of allocating costs by treatment plant component. Where <br /> possible, data will be collected in electronic form to avoid duplication of effort with <br /> regard to data entry. It is understood that portions of the data such as estimated dates <br /> placed in service may be based on best estimates provided by Owner's utility staff. <br /> Task 2—Historic and Current Cost Information <br /> As part of the data collection efforts in Task 1, historic and current cost information for <br /> production facilities, including related engineering and project administration costs will <br /> be obtained. Available historic cost information will be trended to current day <br /> construction cost levels based on construction cost indices published in the Handy- <br /> Whitman Index of Public Utility Construction Costs TM for the North Central region. <br /> Major or total equipment related to each plant component will be separately identified <br /> from the related basin or other structure. <br /> Task 3 —Estimated Level of Annual Reinvestment <br /> The reproduction cost for equipment and building structures will be divided by their <br /> respective expected service lives to estimate an average amount of annual re-investment <br /> required to maintain the supply and production system at current cost levels. T'he average <br /> service life for each structure and major piece of equipment will be used as a variable to <br /> produce a range of required reinvestment assuming service lives within plus or minus five <br /> years of the anticipated average service life for each structure or major piece of <br /> equipment. Based on discussions with Owner's utility staff and a review of historic cost <br /> indices, an estimate of future cost trends will be developed and applied to current <br /> reproduction costs to estimate appropriate inflation adjusted average levels of <br /> reinvestment for the next 20 yeazs. <br /> Task 4—Letter Renort <br /> A letter report will be prepared summarizing the results of the study. The letter report <br /> will include summary tables of production system components and estimated ranges of <br /> reinvestment for the next 20 yeazs. Engineer shall provide 10 copies of the final letter <br /> report, and an electronic copy of the final report on CD. <br /> A-2 <br /> City of Decatur Task Order No. 13 <br /> Rev.06-23-08 <br />