Lokk at this DD: Alluvial Mining: http://geology.er.usgs.gov/eespteam/diamondproject/alluvialmining.htm Geotextile Dewatering Tubes used for Alluvial Mining: http://www.spinpro-us.com/index.html DD By: Chopp 7/11/2011 How the Tubes Work: http://www.youtube.com/watch?v=aKyfyDp-ohM DD By: TAPPER JIM **Report on Black Rock Canyon from 2004** http://www.nbmg.unr.edu/scans/0830/60000251.pdf DD By: foxwoodsfan 6/25/201 I think I found the original land patent for the 1,340 acres of staked prospects in Section 9, Township 29 North, Range 47 East, Mount Diablo Meridian (lines 10, 11 & 12 of the list): http://www.glorecords.blm.gov/details/patent/default.aspx?accession=924470&docClass=SER&sid=rqxjog1q.ien DD By: foxwoodsfan BRCM owns a 48" Knelson Concentrator, here's how it works: http://www.youtube.com/watch?v=QHr55_eRi44 It is already on this site just above the forum!