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dam. <br />c , <br />t <br />f-+ The mean annual flow at the Englewood dam site for the period <br />1921 -49 has been estimated as 103,200 acre -feet, ranging from 31,640 <br />Cn acre -feet in 1937 to 322,400 acre-feet in 1941. Rainfall records for <br />Ulysses, Kansas, shows that the annual precipitation averaged 19.8 inches <br />for the period of discharge record 1938 -49, 17.5 inches for the period <br />including discharge estimates 1921 -49, and 16.2 inches for the period of <br />precipitation record 1891 -1949. A minimum calendar year precipitation of <br />8.4 inches occurred in 1896. <br />Near the Englewood dam site the river leaves the High Plains province <br />and crosses the Permian redbeds, which extend nearly to its mouth. The <br />river makes a short loop into Kansas, then enters Oklahoma again to form <br />the boundary between Harper and Woods Counties. In this region the Cimarron <br />becomes highly mineralized from underlying salt beds. The generally poor <br />quality of the water extends downstream to the mouth. Dissolved solids <br />consist chiefly of sodium chloride. There is considerable artificial <br />pollution from oilfield wastes in the lower part of the basin. <br />2 -5 <br />