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In page Cambrai:

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Moreover, a river link between Paris and the Nord department had been projected as early as the time of Mazarin and Colbert. The construction of the Saint-Quentin canal, between Chauny on the Oise and Cambrai, was taken up in 1802 on the order of Napoleon I and completed in 1810, after the drilling of the Riqueval Tunnel. The canal and tunnel were opened with great pomp on 28 April 1810 by the Emperor and Empress Marie-Louise.[citation needed] The Saint-Quentin canal has experienced heavy traffic, but since 1966, the date of the opening of the Canal du Nord, it has lost much of its importance.[citation needed]