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a river in Perm’ and Kirov Oblasts and in the Udmurt ASSR, a left tributary of the Viatka River of the Volga basin. The Cheptsa is 501 km long and drains an area of 20,400 sq km. It rises in the upland known as the Verkhnekama Elevation and flows through the upland westward in a deep and broad valley; in its lower course it crosses the Viatka Uval. The Cheptsa is fed mainly by snow. The mean flow rate 85 km from the mouth is 130 cu m per sec. The river freezes over in November, and the ice breaks up in April or early May. The Cheptsa is used for floating timber. It is navigable for 135 km from the mouth. The cities of Glazov and Kirovo-Chepetsk are situated on the Cheptsa.