It would take a major sluicing system to run the kind of yardage we are talking about . I think realisticaly you would have to have two seperate sluices to allow for good clean up and a crew to run them . Sad they wern't more interested in saving that gold , I'm sure the owner would have rewarded them if they were at 90% or better . I would have , The problem today is getting some people to actually work for their money , young or old . I have had many go through in my time , your smart to take care of the ones that do a good job for you .