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-,•%- ... <br /> L . <br /> . <br /> • - !PROPERTY OF BOARD O, <br /> COMMISSIONERS** <br /> H HAZEN AND SAWYER, .c. <br /> CONSULTING ENGINEERS <br /> December 30, 1988 <br /> • <br /> Mr. John M. Link, Jr. <br /> County Manager <br /> County of Orange <br /> P.O. Box 8181 <br /> Hillsborough, NC 27278 <br /> Re: Additional Comments on Development <br /> of a New Reservoir in Northern <br /> • Orange County <br /> Dear Mr. Link: • <br /> We are pleased to present this letter report in fulfillment of our <br /> agreement with the County, dated November 29, 1988, for providing professional • <br /> engineering services related to the development of a new reservoir in Northern <br /> Orange County. In accordance with the agreement, this report presents updated <br /> property requirements and costs for potential reservoirs on Seven Mile Creek <br /> and on the Eno River above McGowan Creek. These updates are based upon new <br /> 41 topographic maps that have been prepared by Piedmont Aerial Surveys under <br /> contract with the County. In the Phase I Water Supply Study and related <br /> studies, estimates of reservoir water surface elevations and associated <br /> property requirements were based upon one-inch to 2000-foot topographic maps <br /> with 10-foot contours. The new maps are.plotted at a scale of one inch to 200 <br /> feet and have 5-foot contour intervals. They permit property and other <br /> requirements for reservoir construction to be defined with much greater <br /> accuracy than was previously possible. <br /> This study has focused on defining property requirements for the <br /> following levels of safe yield development, which have been previously <br /> evaluated for the two referenced sites: <br /> Previously • <br /> • Total Total Estimated <br /> 20-Year Required Water Surface <br /> Safe Yield Storage - Elevation <br /> _ <br /> (mad) (ma) (ft ms1) <br /> From Phase I Study, 1750 572 <br /> Eno River above McGowan Creek 8 <br /> { - Seven Mile Creek..—.... -- ••- <br /> 2100' .__:. 581 <br /> Town of Hillsborough <br /> Seven Mile Creek 8(7)* 4900 597 <br /> *Hazen and Sawyer estimate <br /> 4300 GLENWOOD AVENUE - P.0.80X 30428 • RALEIGH.NORTH CAROLINA 27622 • (919)782-8333 <br /> RALEIGH.NC • DURHAM,NC • CHARLOTTE.NC - NEWPORT NEWS.VA • HOLLYWOOD.FL - NEW YORK•NY <br /> • <br />