I followed the whole Dortmund-Ems canal on Bing maps and couldn't pinpoint an exact match. IIRC the canal crossed 4 rivers. Then I started to look at other canals in Germany and Europe, there are a whole lot, more than I would of ever imagined. The Europeans have been digging their own ways to to rivers or the sea for centuries.
Leteln is on one side of the canal bridge and Minden is on the other. The canal is the Mittellandkanal and the German name is of the crossing is the "Weser Aquadukt".