Agenda - 10-21-1986 - Laserfiche WebLink

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UPDATE ON UPPER ENO RIVER, ORANGE COUNTY, 1986 Prepared by Donald N. Cox, Hillsborough, N. C., . September 19, 1986 The Eno River rises in northern Orange County, flows by Hillsborough,_ through the Eno River State Park into Durham .County, where in eastern Durham County it joins with the Little River and Flat River to form the Neuse River. The Eno, at Hillsbcrough has .an average "flow of approximately 66 cfs, an historic 7Q10 of 1.7 cfs; and from yarious stream studies, a need for a 5.4 cfs - minimum flow for preservation of a viable fish habitat. - The water supply impoundments on the Eno River include Lake Orange, owned by Orange County, on the east fork of the Eno, fed by approxtmatelii 14 percent of the river watershed above Hillsborough, providing by fair the major supply of water, Corporation Lake on the main run of the Eno, owned by the Orange-Alamance Water System, a private water company, Lake Ben Johnson, with a dam on the main stem of the river just below Corporation Lake, owned by Hillsborough, and a small impoundment formed by damming the river and cutting a diversion channel for the river, used by Piedmont Minerals for process water to separate the pyrophyllite mined and processed nearby. The Orange-Alamance Water System currently withdraws .6 - .7 mgd with 95% leaving the Neuse River Basin, 75% delivered out of Orange County into Alamance County. Hillsborough withdraws approximately 1.3 mgd for its. service area, approximately 60% is returned to the Eno 3.2 miles downstream at its wastewater treatment plant outfall . Hillsborough may also treat and deliver ! to Orange Water and Sewer Authority, serving Chapel Hill and Carrboro in the Cape Fear River Basin portion of Orange Countyyamounts of water ranging from .4 to 1.5 mgd. All of this portion is removed from the Neuse Basin_