Agenda - 10-22-1991 - Laserfiche WebLink

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to reflect its very low density pattern of development and the existence of one current water supply and two potential supplies. The "Middle Eno" sub -basin lies between Lake Ben Johnson (intake point 103.0) and Corporation Lake. This sub -basin includes the proposed Seven -Mile Creek reservoir. Orange County recommends that this sub - basin be classified WS -3 to reflect its land use pattern. Future land uses in this basin should not affect this sub - basin's potential for meeting WS -3 standards. For the "Lower Eno" basin (from Lake Ben Johnson through Hillsborough into Durham, Orange County recommends that the Eno emergency intake in Durham be protected as follows: As a primary approach, the use of vegetative stream buffers rather than any watershed classification, is recommended (as proposed by the Durham City- County Planning Department. Failing this, orange County requests that the Lower Eno Protected Area continue to be classified WS -4 - applying to the 10- mile "protected area" only. Summary: Upper Eno: WS -2 Middle Eno: WS -3 Lower Eno: Buffers, or WS -4 Finally, regarding the classification of watersheds, orange County .requests that completion of special watershed studies be used as the primary criterion for determining whether other watersheds may qualify for CRITICAL WATERSHED (CW) STATUS. COMMENTS RELATING TO WATERSHED RULES ISSUES OR DEFINITIONS 1. DEFINITION OF "CRITICAL AREA" Orange County feels that the best methodology to determine the true geographic area critical to protecting water supplies is the concept of stream "travel time" for pollutants to reach water supplies. However, it is recognized that detailed research must be completed to reasonably project travel time. Given this yarn to tae usecx as a vvaerault-- NNW ::.�:<: <., :: f .;.w> : >:. ter:;::; ,:.,::.. s a ewfVg minimum. O^angei Cour►ty further applauds the provisions in the rules that allows local governments to