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Which railways cross the Ob River and Irtysh River?
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Ob River
The Ob and Yenisey river basins and their drainage networks.
The Trans-Siberian Railway is the primary rail system that crosses both the Irtysh River and the Ob River. Specifically, the main line crosses the Irtysh at Omsk and the upper Ob at Novosibirsk.1
Additionally, other rail lines connect the upper Ob to Kazakhstan, crossing the river at Barnaul.1