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20 <br /> FLOW AND STORAGE REQUIREMENTS <br /> Instream Flow <br /> In addition to maximum withdrawal limits set for offstream uses in the Eno River Basin, minimum <br /> instream flow requirements are established at the Hillsborough streamflow gage (USGS <br /> Streamflow Gage #02085000). A minimum of 1.7 cfs (1,100,000 gallons per day) is to be <br /> maintained at the gage when Lake Orange is greater than 80 percent total storage. This value is <br /> reduced as the storage level decreases at Lake Orange. Table 1 lists the minimum instream flow <br /> requirements. Orange County will be responsible for coordinating releases to maintain <br /> minimum flows at the gage. The three major withdrawers will provide withdrawal schedules to <br /> the County at least one week in advance and will notify the County immediately regarding <br /> emergencies and other necessary changes in the withdrawal schedule. <br /> Additional Storage <br /> The withdrawal allocation can be revised whenever additional storage facilities are completed <br /> in the capacity use area or when additional water supplies are made available from sources <br /> outside the area. New storage facilities will be reviewed to ensure that there are no adverse <br /> effects upon the permit holders or on streamflow as measured at the Hillsborough gage. <br /> Outside Sources <br /> Water obtained from sources outside of the area designated as capacity use will not be limited <br /> under the Eno Capacity Use regulations. During periods of higher flows (over 10 cfs or 6.452 <br /> MGD), public water supply systems may take additional water from the Eno, provided that <br /> they have long-term contracts for obtaining an equal amount of water from outside the basin <br /> when the flow in the Eno drops. This type of adjustment will be evaluated on a case-by-case <br /> basis by the N.C. Division of Water Resources. <br /> PLAN ADMINISTRATION <br /> Orange County will be responsible for notifying affected water users of levels at Lake Orange <br /> and the West Fork Eno Reservoir and of the reductions of water withdrawals as required by <br /> the Plan. <br /> Periodic Review and Changes <br /> Withdrawal allowances will be subject to review when changes have been made to current <br /> systems, storage, or supply sources. <br /> Plan Support <br /> Technical support, plan clarification, and approval of minor interim adjustments and <br /> modifications will be provided by the N.C. Division of Water Resources. <br /> 7 <br />