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In page Rhine–Herne Canal:

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The port has two docks branched from the canal situated just east of the lock at Gelsenkirchen and has a water surface of 117,800 square metres (1,268,000 sq ft). The industrial port is ~900 by 60 metres (2,950 by 200 ft) and the trading port ~500 by 75 metres (1,640 by 246 ft).[1] A private railway of length 18.4 kilometres (11.4 mi) is operated which is linked to the tracks of the Deutsche Bahn