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Attachment 3 <br /> ORANGE- ALAMANCE WATER SYSTEM, INC. <br /> POST OFFICE BOX 187 MEBANE, NORTH CAROLINA 27302 TELEPHONE: (91 9) 563-621 2 <br /> December 30, 2019 <br /> Donald F. Greeley, Director RAtiwaa <br /> 091ce at the Director <br /> Department of Water Management <br /> City of Durham JAN 6 2020 <br /> 101 City Hall Plaza <br /> Durham, NC 27707 <br /> Dept.of Water Management <br /> RE:Teer Quarry Operation and Eno River Capacity Use Area <br /> Dear Mr. Greeley, <br /> This letter is to confirm that Orange-Alamance Water System has no objection to the City of Durham's <br /> proposed withdrawal of water from the Eno River under the conditions specified by the NC Department <br /> of Environmental Quality Division of Water Resources (DWR).The City of Durham, referred to as the <br /> Durham Water System in the WMOP, is subject to the Voluntary Eno River Capacity Use Area Water <br /> Management Operations Plan (WMOP), as are the Hillsborough Water System (Town of Hillsborough), <br /> Orange County,the Orange-Alamance Water System, and Piedmont Minerals (now Resco Products). <br /> The City of Durham (City) owns the Teer Quarry Reservoir located adjacent to the Eno River and needs <br /> to operate the facility under broader parameters than those currently permitted under the Finding of <br /> No Significant Impact(FONSI) for the Phase I Teer Quarry Supplemental Storage Project (2010) in order <br /> to meet the City's water supply needs.The City of Durham Department of Water Management <br /> developed a broader set of water withdrawal and water supply access conditions in collaboration with <br /> DWR,the NC Wildlife Resources Commission (WRC) and the US Fish and Wildlife Service (USFWS), and <br /> discussed those conditions with the Eno River Water Users at their annual meeting on August 30, 2019. <br /> The essence of the agreed-upon conditions for withdrawal from the Eno River is: <br /> 1. A withdrawal rate of 5 mgd is currently allowable under the Voluntary Eno River Capacity Use <br /> Area (CUA) Water Management Operations Plan. <br /> 2. Withdrawal rates exceeding 5 mgd may only occur when Eno River flows as measured at the <br /> USGS Eno River Gage near Durham (US-501) exceed the annual median flow of 49 cfs, i.e.,flows <br /> well above the low flow conditions of concern in the WHOP. <br /> 3. Withdrawal rates exceeding 5 mgd require a flowby rate downstream of the point of withdrawal <br /> measured at the USGS Eno River Gage Near Durham. <br /> a. The total flowby requirement in the Eno River downstream of the point of withdrawal <br /> will be 90% of flow above 49 cfs when Teer Quarry is above 254' MSL. <br /> b. The total flowby requirement in the Eno River downstream of the point of withdrawal <br /> will be 80%of flow above 49 cfs when Teer Quarry is below 254' MSL. <br /> 4. Withdrawal rates exceeding 5 mgd may only occur when Falls Lake is at or above guide curve <br /> (251.5' MSL). <br /> Sincerely, <br /> Faye Metcalf, <br /> Board of Director <br />