Agenda - 08-23-1993 - C 1-4 - Laserfiche WebLink

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06 ; (Page 2 . 3-6 ) Orange Alamance Water Systems, Incorporated (OAWS) OAWS is a non-profit association formed in 1969 to serve populated areas in western Orange and eastern Alamance counties . The system has recently defined a future service area in Orange County in and near the village of Efland. The service area crosses the ridge line separating two major drainage basins, the Cape Fear and the Upper Neuse, serving the US 70 corridor west from Efland, the Mebane area and several rural communities in eastern Alamance County. A small portion of Cedar Grove Township is also served with water by the system. Approximately one-third of OAWS customers are in Orange County, with a slightly smaller proportion in the Upper Neuse drainage basin. Industrial use accounts for about 20% of total usage in the system. The three major industrial users - GKN, Honda, and Dayco - are located in Alamance County. The primary raw water source for OAWS is Corporation Lake, an impoundment on the Eno River just north of US 70, which has a 20 year safe yield of 0.7 mgd. The rate of sedimentation is such that 35% of its storage capacity has been lost since the dam's- construction in 1969 . At that rate of sedimentation, Corporation Lake would be completely filled by the year 2025, with a resulting net yield of zero. The Orange County Water Conservation Ordinance, effective January 1988, allocates 0. 80 to OAWS from Lake Orange when the lake is at its normal level. This allocation drops to 0 . 32 mgd when Lake Orange reaches crisis level. OAWS has interconnections on the east with Hillsborough and on the west with the Graham-Mebane water system. Graham-Mebane is , in ................................................................................. turn, connected to the City of Burlington. '13 90'' '> a ci. es>of. ::..:.:.-..: .._...i:::::::::: ):::: ::. .:;:. .i':::::::::::..�:::::::::.�. i'::. ..;:::.. .;.�:.-:.::nom;.;::.: ::::::::.:. :;i i:::.�...:::::. ::::i•:. ..�. :iv:;.............................................Y................ Gza3 am and::*0*.'::::<c: let construction :o ;;t ei r own reservoir on Back:: n::eastern Alamance Count::: : res:i ents of ti o se>t o ±cities. Between 1980 and 1986, raw water pumped from OAWS increased by 50%, from 0 . 42 mgd to 0. 63 mgd. Population served during that time increased from 4 ,800 to 6, 150. Projected water demand and deficits are shown' in Figure 2 .4 . These figures show that the system is rapidly reaching capacity when Corporation Lake is considered as a sole source. Even with a full allocation from Lake Orange, under the Orange County Water Conservation Ordinance, OAWS faces a system-wide demand deficit by 1995 . POTENTIAL WATER S IJ SOURCES FOR O C I 1590 the ne reek Ras.raci r::> n ain Tc sh : as .et+ d as saw serve$ A;:.1**. c r > ; ; it3 is :::OWASA should nave adequate supplies'of wter through the twenty year plan period. The two water suppliers in central Orange County are in a less enviable position. As growth trends and the drought of the mid 1980 's clearly showed, Hillsborough and OAWS have serious water supply needs that are both short and long term.