The Old Settler's Irrigation Ditch, near Rosston, Oklahoma, in both Beaver County, Oklahoma and Harper County, Oklahoma, was constructed during 1893 to 1905. It was listed on the National Register of Historic Places listings in Beaver County, Oklahoma in 1983. It enabled Ditch Valley to become a lush green area, in contrast to the surrounding arid lands. It is about wide for much of its length. It is supplied by water from a diversion dam on the Cimarron River. With

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