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ors <br /> support to the claim that the conversion seen elsewhere in <br /> the County is not occurring in Cedar Grove Township . <br /> TABLE 3-1 <br /> CEDAR GROVE FARMLAND TRENDS , 1955-1977 <br /> Acreage <br /> 195 1977 Change % Change <br /> TOTAL CROPLAND 15, 567 ac. 13,689 ac. -1 ,968 -12 .6% <br /> TOTAL PASTURE 3,649 ac. 5 ,452 ac. +1 ,803 +49 .4% <br /> TOTAL FARMLAND 19,306 ac. 19, 141 ac. . -165 0 .9% <br /> Source: North Carolina Crop and Livestock Reporting Service <br /> Natural Environmental CQDgtraints. <br /> Cedar Grove Township contains four natural environmental <br /> constraints to development activity ; floodplains, water <br /> supply watersheds, steep slopes, and poor soil conditions. <br /> Water Supply Watersheds : The headwaters of three water suppl <br /> watersheds, serving four water systems, rise in Cedar Grove <br /> Township. The three, Back Creek, Eno and Little Rivers <br /> together cover almost 90% of the Township ' s total area. <br /> Two impoundments on the Eno River downstream of the <br /> Township, Lake Ben Johnson and Corporation Lake, are the <br /> primary sources of water for the Town of Hillsborough and the <br /> Orange Alamance Water System (OAWS ) respectively. OAWS serves <br /> Efland and portions of Mebane and Alamance County. Upstream <br /> of those two impoundments, in Cedar Grove Township, is county <br /> owned Lake Orange. The lake is an augmentation reservoir from <br /> which water can be released during low flow periods to <br /> increase availability of water to downstream users. <br /> The headwaters of the North and South Forks of the <br /> Little River originate in the eastern third of the township <br /> and flow into Durham ' s Little River Reservoir. The western <br /> third of the Township gives rise to Back Creek, which flows <br /> into the Back Creek Reservoir, a source of water for Graham <br /> and Mebane. Finally, the northeastern corner of the township <br /> (an area of about 400 acres) lies in the Flat River <br /> Waters ed, which feeds Lake Michie, Durham' s main water <br /> supply at present. While these reservoirs do not directly <br /> serve Cedar Grove Township, they do serve Township residents <br /> who work or shop in Graham, Mebane, or Durham. Water system <br /> interconnections and contractual agreements additionally <br /> create the potential for water from these reservoirs to serve <br /> Orange County residents. <br /> Floodplain : The majority of the Township ' s 100-year <br />