Osha (river)
River
57°12′42″N 73°40′13″E / 57.21167°N 73.67028°E / 57.21167; 73.67028The Osha (Russian: Оша) is a river in Omsk Oblast, Russia, a left tributary of the Irtysh.[1] It is 530 kilometres (330 mi) long, and has a drainage basin of 21,300 square kilometres (8,200 sq mi).[2] The river flows across lake Tenis.[3]