Agenda - 09-19-2007- - Laserfiche WebLink

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Orange County water supply reservoir water levels Available information as of 11:00 A141, Thursday, September 13, 2007 Lake Orange • Water level 60" below spilling. • Water storage capacity remaining is 55.7% (264 million gallons) • Approximately 93 days of water supply remaining (at Capacity Use specified release rate) • Current Eno River flow at the Hillsborough gage is averaging approximately 2.8 cfs {1,810,000 gallons per day), which is slightly below the median flow for this time of year.. • Phase 3 Eno River Capacity Use withdra«~al restrictions have been in effect as of September 5~` 1~'est Fork Reservoir (as of 9/7/07) • Water level is 35" below spilling • Water storage capacity remaining is 85.3% • Approximately 285 days of water supply remaining (assuming Town's current demand [averaging 1.4 mgd [2.2 cfs] over the last few weeks] and current releases for streamflow augmentation of 0.65 mgd [1.0 cfs] minimum]) • Since 9111/07, the Town has been releasing 2.2 mgd [3.4cfs] into the river for the last week (0.2 mgd [0.4 cfs] more than required for its own use and its minimum instream flow release) to help preserve Eno instream flow and water level in Lake Orange. O«'ASA Reservoirs • Water level at Cane Creek Reservoir is 8 L 5" below full • Water level at University Lake is 80.8" below full • Total remaining water storage capacity is approximately 63.1% • Approximately 186 days of water supply remaining (at current 7-day average daily demand [11.5 million gallons per day]) • OWASA declared a "Water Supply Advisory", a earning of the potential onset of mandatory water use restrictions on OVVASA customers on August 23'~~. National ~~l'eather Sei•~~ice(NOAA Re6ional Precipitation data (niches above f+l or below f-1 noi•~nal) RDU Piedmont-Tizad -1.56" since September 1, 2007 -1.56" since September 1, 2007 -7.16" since January 1, 2007 -11.16" since January 1, 2007 Miscellaneous notes 1. The NC Drought Management Advisory Council drought map, updated September 13, 2007, shows all of Orange County to be in the area characterized as "extreme drought" in terms of climatic conditions. 2. Given that Orange Alamance's ~~~ithdrati~~als are now averaging well below historical levels; Piedmont 11~Iinerals withdraws are but a tiny traction of its historical levels of withdrawal; and excess releases by Hillsborough, the «~ater level at Lake Orange, though low, is well above historical expectations, given the cui7-ent lack of rainfall.