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this 22-year period, diminishing by less than 1%. <br /> In summary, Cedar Grove township is one of the most important agricultural <br /> areas in the County. As of 1971 , it contained over 36% of all the cropland and <br /> 25% of all the pastureland in the county even though less than 20% of the county's <br /> land area is within the township. <br /> Transportation <br /> A modified version of the North Carolina Highway Functional Classification <br /> System has been used by the Orange County Planning Department to describe the <br /> road network in Cedar Grove township. The major township roads are the arterial <br /> highways, NC86 and NC49, both important north/south transportation routes. One <br /> level below the arterial highways are the collector roads which provide access <br /> to the major road system. In Cedar Grove township these include Efland-Cedar <br /> Grove Road (SR 1004), Carr Store Road (SR 1004/SR 1352) , Corbett Ridge Road <br /> (SR 1004) , Walnut Grove Church Road (SR 1001 ) , Little River Church Road (SR 1543) , <br /> Wilkerson Road (SR 1507) , Lynch Store Road (SR 1364), and Saw Mill Road (SR 1545) . <br /> Natural Environmental Constraints <br /> The natural environmental constraints in Cedar Grove township include flood- <br /> prone areas, water supply watersheds, steep slopes and soil conditions. <br /> Flood Hazard Areas: The major flooding hazard in Cedar Grove township <br /> exists along the Eno River, the South Fork of the Little River and Forrest Creek. <br /> The areas that would be subject to flooding in a storm which would occur on <br /> average once every 100 years is not extensive. It is generally confined to <br /> band along these streams rarely exceeding 1000 feet. <br /> Water Supply: The Eno River which has its head waters in Cedar Grove <br /> township is the water supply for the Town of Hillsborough and for the Orange- <br /> Alamance Water Systems Incorporated, a nonprofit association which supplies <br />