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In page Amur:

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The first permanent bridge across the Amur, the Khabarovsk Bridge with an overall length of 2,590 metres (8,500 ft), was completed in 1916, allowing the trains on the Trans-Siberian Railway to cross the river year-round without using ferries or rail tracks on top of the river ice. In 1941 a railway tunnel was added as well.[citation needed]