Is your gold recovery actually 95%, 90%, or even a really poor 50%? If you are not testing to know what it really is, you just don’t know. Some do regular testing, but most do not.

…as an academic argument, when mated to the appropriate engine, is the pump really moving water at the rate of 400 GPM?

Then I came to a section of recently exposed gravel that looked unworked. Water seeped out all around, making the ground beneath a sea of slick mud.

Excited for this first notable evidence, I returned to that riverbed, looking for another paystreak and obviously more jade.

Many suggestions had some pieces or parts that would work some of the time, but Dredger Dan’s suggestion was, in my humble opinion, the cleanest, cleverest, and most dependable.