The Coen Tunnel (1966) is a tunnel in the A10 motorway under the North Sea Canal in western Amsterdam. The tunnel is named after the Coen port in the vicinity which was named after Jan Pieterszoon Coen. The tunnel itself is 1283 metres long of which 587 metres are fully covered. The tunnel connects the Zaan district with the western part of Amsterdam. The tunnel reaches a maximum depth of 22 metres.