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Drought Response Operating Protocol January 10, 2013 Page 3 11 These responses are based on the risk of depleting OWASA's existing Cane Creek/ University Lake /Quarry Reservoir system to the Emergency Storage level and are consistent with the Response Triggers of OWASA's State - approved Water Shortage Response Plan. Those risks do not consider Jordan Lake to be part of OWASA's existing or primary water supply (University Lake, Cane Creek, and Quarry Reservoirs), but only as an "insurance policy" for use during extended drought or emergency conditions. if- -- Water Shortage-Advisor : Aggressive public awareness /education effort, including direct 1 communication with the Carrboro, Chapel Hill, and Orange County elected boards and the University of North Carolina at Chapel Hill. A Water Shortage Advisory may be intitiated earlier at OWASA's discretion. Stage 1 Shortage: Mandatory use restrictions -- with or without rate surcharges -- may be intitiated earlier at OWASA's discretion, but not later. The OWASA Board may authorize purchases of water from other utilities and /or obtain water through its Jordan Lake allocation only when total water storage in University Lake, Cane Creek Reservoir, and the Quarry Reservoir is below this Mandatory Stage 'I trigger, but not sooner. Board approval for such a declaration or purchase decision shall not be required, however, during an operational emergency as determined by the Executive Director per OWASA's Water Shortage Response Plan. Stage 2 Shortage: May be intitiated earlier at OWASA's discretion, but not later. Stage 3 Shortage: May be intitiated earlier at OWASA's discretion, but not later. Water Supply Emergency: Emergency actions will be taken to obtain supplemental water to ensure the protection of public health, safety and welfare. If Cane Creek /University Lake /Quarry Reservoir storage declines to this level, such actions would likely include the installation of temporary facilities to pump water from the Haw River to the Cane Creek Reservoir. Drought Response Operating Protocol (For Average Annual Reservoir Withdrawals of 7 MGD) 100% 90% .... Advisory �.., stage 1 80% Stagez U_ 70% Stage 3 �� —a 1 Emergency 1 '— —+ ! — —� 0 50% 50% 1 -W - -- — -- fJ) 40% L 0 30% N 20% d 10% Emergency Storage 0% Jan Feb March April May June July Aug Sept Oct Nov Dec These responses are based on the risk of depleting OWASA's existing Cane Creek/ University Lake /Quarry Reservoir system to the Emergency Storage level and are consistent with the Response Triggers of OWASA's State - approved Water Shortage Response Plan. Those risks do not consider Jordan Lake to be part of OWASA's existing or primary water supply (University Lake, Cane Creek, and Quarry Reservoirs), but only as an "insurance policy" for use during extended drought or emergency conditions. if- -- Water Shortage-Advisor : Aggressive public awareness /education effort, including direct 1 communication with the Carrboro, Chapel Hill, and Orange County elected boards and the University of North Carolina at Chapel Hill. A Water Shortage Advisory may be intitiated earlier at OWASA's discretion. Stage 1 Shortage: Mandatory use restrictions -- with or without rate surcharges -- may be intitiated earlier at OWASA's discretion, but not later. The OWASA Board may authorize purchases of water from other utilities and /or obtain water through its Jordan Lake allocation only when total water storage in University Lake, Cane Creek Reservoir, and the Quarry Reservoir is below this Mandatory Stage 'I trigger, but not sooner. Board approval for such a declaration or purchase decision shall not be required, however, during an operational emergency as determined by the Executive Director per OWASA's Water Shortage Response Plan. Stage 2 Shortage: May be intitiated earlier at OWASA's discretion, but not later. Stage 3 Shortage: May be intitiated earlier at OWASA's discretion, but not later. Water Supply Emergency: Emergency actions will be taken to obtain supplemental water to ensure the protection of public health, safety and welfare. If Cane Creek /University Lake /Quarry Reservoir storage declines to this level, such actions would likely include the installation of temporary facilities to pump water from the Haw River to the Cane Creek Reservoir.