Knowing little to nothing about this stuff I did some reading over the winter and decided to build a high banker to try this summer. I used an Angus Mackirk Au trap drop riffle sluice, a 40 gallon tub from amazon, and two 1250 gph sumps I had laying around. The AC sumps will be powered by a generator running full steam.
After some testing I am wondering if the sluice pitch I tested is too steep or do I need more flow. From what I have gathered the drop riffle design is great for catching fines while washing away black sand and other heavy materials but I am not sure if this setup is tuned properly. The angle of the sluice in the video is 4.16* which should be an inch drop per ft of sluice length. Both sumps are running of house AC with no restrictions.
I haven't tested gold bearing material as of yet so I am wondering if this is setup correctly and if not how can I improve this system.
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