Agenda - 09-14-2021; 12-2 - Information Item – Memorandum Regarding Administrative Updates to the Eno River Voluntary Water Management Operations Plan (WMOP)

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7 Instream Flow In addition to maximum withdrawal limits set for offstream uses in the Eno River Basin, minimum instream flow requirements are established at the Hillsborough streamflow gage (USGS Streamflow Gage # 02085000) . A minimum of 1 . 7 cfs (1 , 100, 000 gallons per day) is to be maintained at the gage when Lake Orange is greater than 80 percent total storage. This value is reduced as the storage level decreases at Lake Orange. Table 1 lists the minimum instream flow requirements. Orange County will be responsible for coordinating releases and maintaining minimum flows at the gage. The three major withdrawers will provide withdrawal schedules to the County at least one week in advance and will notify the County immediately regarding emergencies and other necessary changes in the withdrawal schedule. Additional Storage The withdrawal allocation can be revised whenever additional storage facilities are completed in the capacity use area or when additional water supplies are made available from sources outside the area. New storage facilities will be reviewed to ensure that there are no adverse effects upon the permit holders or on streamflow as measured at the Hillsborough gage.