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43 <br />Updated Rogers Road Sewer Service Concept Plan and Cost Estimates <br />February 8, 2011 <br />Page 3 <br />Construction cost estimates are preliminary only and are not based on a site -level <br />assessment of field conditions. Cost estimates will become more precise as detailed <br />engineering design proceeds. Please note that additional costs for acquiring sewer <br />line easements that may be needed across privately property have not been included <br />in these totals, due to the highly variable and case-specific nature of these costs. <br />Estimates are based on the best information available as of February 2011. In <br />general, construction costs have remained stable during the recessionary economic <br />conditions of the past three years, but OWASA assumes that project costs will <br />escalate at a 5 percent annual rate in the coming years as economic conditions <br />improve. We recommend that this inflation factor be used in any future <br />interpretation of these estimates. <br />The overall extent of this concept plan, including the number of unserved parcels, <br />will change in the future if (or as) individual development projects extend new <br />sewer lines to currently unnerved properties. <br />The costs shown below are for the extension of sewer to unserved portions of the <br />Rogers Road study area only. Additional eU r lot costs for connecting individual <br />properties to the sewer system are discussed in the next section. <br />Estimated Costs of Extending OWASA Sewer Service to All <br />Currently Platted Parcels within the Town of Chapel Hill's <br />Rogers Study Area <br />Engineering Design & Permitting <br />$198,000 <br />Construction <br />$2,562,000 <br />Construction Administration <br />$128,000 <br />Construction Inspection <br />$128,000 <br />Contingency <br />$414,000 <br />Total <br />$3,430,000 <br />Individual Connection Costs — As noted, the table above only includes estimates of <br />constructing the sewer collection system itself. Additional pgLlot costs for connecting to <br />the new system would include the following: <br />OWASA Service Availability Fee — This one -time connection fee represents the <br />proportional cost of "buying in" to OWASA's existing facility infrastructure (main sewer <br />lines, treatment plant, etc.) and is assessed according to the square footage of residential <br />