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How wide does the Ob River valley become in its middle course?
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Ob River
The Ob and Yenisey river basins and their drainage networks.
In its middle course, which extends from the junction with the Tom River to the confluence with the Irtysh River, the Ob River valley broadens significantly as it flows through the taiga. In this section, the valley reaches a width of 18 to 30 miles (29 to 48 km).1