To: TheBusDriver who wrote (992 ) 8/8/2002 3:47:00 PM From: marcos Respond to of 1285 Wouldn't be ships they'd haul in, it would be barges special-built for the purpose ... they're common now elsewhere, many of them self-dumping using conveyor systems and maybe a wheel loader on board for the corners ... of course if you self-powered one you could call it a ship i suppose, they usually say 'carriers' nowadays though Gravel under water like that should be cheap to handle if you set up an efficient system, which would be great chunks of capex certainly, but once done, and if engineered correctly, you should be able to hoover it up and blow it through a pipeline into a shore-based screen plant which would shunt off each sort into its crusher and/or loading bin or whatever, quite cheaply on a per-cubic-metre basis .... you wouldn't need a wash plant at the start, because you've got the river water coming with it, in whatever proportion you like [edit] - the dutch are past masters at this sort of thing .... i predict we'll see a dutch name show up at some point in the list of engineers involved .... anything to do with dredging, building breakwaters, dykes, etc - they've been in the business for centuries, started at home ... biggest shoreline modification company in the world is dutch, i forget the name, met a couple of their engineers once though, smart guys and they have impressive machinery The other big risk, a class of political risk, is the chance of a real or perceived damage to fish and/or other species .... silting downriver shouldn't be a problem, since you're hoovering up all the silt, not dredging with some kind of bucket system ..... but what if there's some rare kind of snail crawling around down there, or some fish that spawns only in that channel, or spends its juvenile life there