Maxi here it is, posted just after I saw your shot. http://www.shipspotting.com/gallery/photo.php?lid=2890990

Hello Pieter. What a coincidence. Send me the link to see your photo.
Actually is a kind of dredger, but not do chnnel maintenance. They extract sand from the bottom of the river and them sell it for the construction industry.

Hi Maxi, just posted a shot of heer taken in 1998 or thereabouts. I think it is actually a dredger.