How He Built a Recirculating Sluice, by Mike Davis

If you want a detailed analysis of the project to build a recirculating sluice, here is the place to look
http://mdpub.com/sluice/
FInd 40 photos, drawings, schematics along with detailed instructions. This is by far the best site I have found on the subject of a home made recirculating sluice.

Homepage: http://mdpub.com/index.html

Courtesy of https://www.instructables.com/A-recirculating-sluice-box-for-gold-prospecting/

A great article.