Canadians sure can use dredge's.Seen dredge permits and dredging in action,but thats not the point here.Reggie gould sells them,here is what he had to say to me.
" The prices are on my web site Gould Engineering Advanced Gold Recovery Systems
under New Bazooka. The 4" is $700,00 which includes the Suction Nozzle, 5 feet of Dredge Hose, the Bazooka and the Nugget Trap with the High Powered magnet.You need to buy a 200 gpm pump 5 HP motor with intake hose and Foot valve ot strainer and 30 feet of 1-1/2" diameter supply hose rated at 90 psi. As far as silt you would not want to put anything on the output it would only cause a jam. The Bazooka is a sub-dredge so it sits on the bottom of the river. So the silt also stays on the bottom of the river and mostly stays there. Most people would never know you wre dredging. The conventional dredge puts the silt on the surface of the water and leaves a trail for larhge distances. The Gould-Bazooka is the most enviormental unit on the market. It is also the most effecient unit on the market, a 200 gpm pump will run the entire dredge where most dredges use two pumps. A 200 gpm pump will actually run my 5" dredge." Reggie.
I think that this style of dredge would be alot better than a convential dredge when it comes to enviromentalists.No reason why you could not get a work permit to use this device,with a reclaimation bond.
Also $700.00 dollars is not a bad price when compared to a keene 4"?I am strongly considering one,much easier to set up,costs less,less environmental impact,but might not recover fine gold as well as a keene sluice,but that wouldnt bother me,I can get fine gold anywhere,cant get the nuggets everywhere.