Orange County NC Website
23 <br /> Eno River Water Management Plan <br /> Table 1 - Eno River Water Management and Operations Conditions (revised October 2020) <br /> Triggers Allowable Surface Water Withdrawal Minimum Releases <br /> West Fork Instantaneous <br /> Percent of Drawdown in Eno Instream Flow <br /> Storage Lake Orange Town of Orange- Resco Reservoir Requirement at <br /> Remaining in from top of Hillsborough Alamance Products Lake Orange (WFER)(mgd Hillsborough <br /> Stage Lake Orange flashboard (ft) (mgd [cfs]) (mgd [cfs]) (mgd [cfs]) (mgd [cfs]) [cfs]) Gage(mgd [cfs]) <br /> no stage >100 spilling * * 0.9 [1.4] 1.1 [1.7] 0.65 [1.01] <br /> Stage 1 100-80 0 1.51 [2.34] 0.82 [1.27] 0.43 [0.67] 1.1 [1.7] 0.65 [1.01] 1.75 [2.71] <br /> Stage 2 80-60 2.0 1.36 [2.10] 0.74[1.15] 0.38 [0.59] 0.65 [1.01] 0.65 [1.01] 1.3 [2.01] <br /> Stage 3 60-50 4.3 1.28 [1.98] 0.7 [1.08] 0.36 [0.56] 0.45 [0.7] 0.65 [1.01] 1.1 [1.7] <br /> Stage 4 50-40 5.8 1.28 [1.98] 0.7 [1.08] 0.32 [0.5] 0.45 [0.7] 0.65 [1.01] 1.1 [1.7] <br /> Stage 5 40-30 7.4 1.13 [1.75] 0.62 [0.96] 0.19 [0.29] 0 0.65 [1.01] j 0.65 [1.01] <br /> Stage 6 <30 9.3 ir 0.68 [1.05] 0.19 [0.29] 0 0 0.65 [1.01] 0.65 [1.01] <br /> million gallons per day(mgd);cubic feet per second(cfs);feet(ft) <br /> *When flows are greater than 10 cfs as measured at the Hillsborough gage,additional withdraws beyond those allowed in Table 1 can commence <br /> at rates less than or equal to that of contracts held by the Town of Hillsborough &Orange-Alamance for water supply sources outside the basin. <br /> Low Flow Stage Conditions: <br /> -A low flow period will begin at the end of the 7th consecutive day when the average daily flow at the Hillsborough gage has been below 10 cfs.At <br /> the end of the 4th day,the Orange County Engineer will request that affected parties prepare for a low flow period. <br /> -When flows are between 10 cfs and 3 cfs at the Hillsborough gage during a low flow period,withdrawals from the Eno River shall be limited to the <br /> Stage 1 amount shown above(100-80 percent of storage remaining), regardless of water level in Lake Orange. <br /> -When flows are below 3 cfs at the Hillsborough gage during a low flow period,withdrawals shall be limited to amounts shown above for percent of <br /> storage remaining at Lake Orange. <br /> -A low flow period will be terminated when average daily flow at the Hillsborough gage registers 10 cfs or greater for a period of 7 consecutive days. <br /> The Orange County Engineer will notify affected parties when the low flow period is terminated. <br /> 10 <br />