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~ Water & Sewer Authority of Cabarrus County <br />~/~CC Water and Wastewater System Master Plan <br /> <br />Safe Yield Update and Regional Drought Operations <br /> <br />Location: Orange County, North Carolina <br /> <br />Management Agency: Orange Water and Sewer Authority <br /> <br />Drought Indicator(s): [~]Reservoir Water Levels I~]Stream Flows <br /> [--]Water Production and Distribution Capabilities <br /> ~]Drawdown Rates <br /> , [-]Precipitation Outlook <br /> [~]Daily Water Use Patterns <br /> [~Seasonal and Long~Term Weather Patterns <br /> [~Availability of Water from Other Sources <br /> [~]Other: , <br />Additional Information: <br />www.owasa.org/pages/2003consord.asp <br /> <br />Program Summary <br /> <br />The determination of drought shortage conditions shall be guided by periodic extimates of the <br />risk (i.e., probability) that water stored in OWASA's reservoir system will decline to <br />unacceptably low levels within the foreseeable future. Until improved or alternative criteria are <br />developed, such guidance shall be based on a five percent or greater risk that total reservoir <br />storage will decline to 20 percent or less of total storage capacity within an 18 month period. In <br />the event of a water supply shortage, OWASA shall, using its b~st professional judgment, <br />determine which of the following stages is the most appropriate response to the estimated level of <br />risk. <br /> <br />A. Water Supply Advisory <br />B. Stage One (1) Water Shortage <br /> Actions shall be taken with the goal of reducing the overall water demand by 10%. <br />C. Stage Two (2) Water Shortage <br /> Actions shall be taken with the goal of reducing the overall water demand by 15%. <br />D. Stage Three (3) Water Shortage <br /> Actions shall be taken with the goal of reducing the overall water demand by 20%. <br />E. Water Supply Emergency <br /> In addition to the previous measures the following actions shall be taken. <br /> 1. No OWASA-supplied potable water may be used for any outdoor purposes <br /> other than emergency fire or other safety issues. <br /> 2. Water used for heating or cooling shall be reduced to all but essential <br /> facilities. <br /> 3. Water may be discontinued in portions of the service area to preserve the <br /> availability of water for essential public health. <br /> <br />PN 096873.0800 30 <br />January 23, 2004 <br /> <br />BLACK & VEATCH <br /> International Company <br /> <br /> <br />