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13 <br /> allocations to date but is in the process of doing so through the proposed <br /> rules. In this study, Orange County' s allocation is assumed to be 10 MGD, <br /> which is roughly the midpoint between the projected deficits shown in <br /> Table 3. 11 for moderate and high growth. For the purpose of estimating <br /> pumping costs, this allocation is assumed to be evenly split between northern <br /> and southern Orange County. <br /> 6.2 Cost Analysis <br /> Preliminary costs for transmission of 10 MGD of raw water from Jordan <br /> Lake to Orange County are presented in Table 6. 1 . The total project cost,project cost in <br /> terms of 1987 dollars, includes the first costs for construction and purchase <br /> of facilities and the present worth of annual costs . Costs have not been <br /> included for the installation and operation of a new raw water pipeline <br /> extending from the Chapel Hill area to Hillsborough. This pipeline would be <br /> necessary for the transmission of raw water from either the north to the south <br /> or from the south to the north of the County and would be common to all of the <br /> alternatives evaluated in this report. The total project cost shown in <br /> Table 6.1 can therefore be compared on a fair basis with the costs for new <br /> reservoir construction. As is discussed later in this section under <br /> Transmission Main, the total cost for the installation, operation, and <br /> maintenance of this pipeline is estimated to be $5,500,000. <br /> Note that the costs given in Table 6. 1 are based on an independent <br /> County system that would not benefit from any of the regional system concepts <br /> that are currently under discussion. The Triangle J. Council of Governments <br /> has proposed a separate study to evaluate the feasibility of regional <br /> systems. Further, the costs in Table 6. 1 relate only to the direct <br /> transmission of raw water to the County' s water treatment plants, with <br /> additional costs included to address water quality concerns. The transmission <br /> of finished water from a central water treatment plant would provide a means <br /> to help defray project costs through sales of water en route and might well be <br /> a more attractive alternative for the County to pursue. This and other <br /> potential regional alternatives could not be evaluated under the scope of this <br /> study. Alternative schemes for transmitting finished/raw water from Jordan <br /> Lake should be evaluated in future studies if the County elects to pursue the <br /> acquisition of water from this source. ' <br /> 6-2 <br /> 1 <br />