Item - Agenda w-Hillsborough 03-22-2004

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i Revised March 1.989 Table 1 Maximum Allowable Surface Water Withdrawals Based on Lake Orange Level Drawdown Allowable Surface Water Withdrawal Percent of in feet -- - - - - -- gallons per day---------- - Storage from top Remaining at of 1 -ft. Town of Orange- Piedmont Instream Flow Lake Orange flashboard Hillsborough Alamance Minerals Requirement > 100 spilling * * ** 11100,000 100 - 80 0.0 11510,000 820,000 430,000 1,100,000 80 - 60 2.0 11360,000 740,000 380,000 650,000 60 - 50 4.3 11280,000 700,000 360,000 450,000 50 - 40 5.8 1,280,000 700,000 320,000 450,000 40 - 30 7.4 11130,000 620,0;00 190,000 0 <= 30 9.3 680,000 370400 0 0 notes: * - Adjusted to reflect outside source agreement for Hillsborough and Orange - Alamance . Excess withdrawals from Eno River based on outside source agreement can be made when flows at Hillsborough Gage are 10 cfs and above, regardless of water level in Lake Orange. Maximum withdrawals will be limited to the total of the contract amount and the allocated amount. - When flows are between 10 cfs, and 3 cfs at the Hills- borough Gage, withdrawals from the Eno River will be limited to the 100 -80 percent of storage remaining amount shown above, regardless of water level in Lake Orange. - When flows are less than 3.-cfs at the Hillsborough Gage, withdrawals will be limited to amounts shown above for percent of storage remaining. ** - For Piedmont Minerals Inc: When flows at the Hillsborough gage are 14 cfs and above, withdrawals from the Eno River will be limited to 900,000 gallons per day (gpd). Between 14 cfs and and 4 cfs, withdrawals will be limited to 430,000 gpd, regardless of water level in Lake Orange. Below 4 cfs, withdrawals will be limited to amounts shown above for percent of storage remaining.