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Dredging the Mokelumne
February 2008 by Tom Leftwich
Gold mining adventures can begin in the most unusual fashion. This one started when the high water receding in May of 1999 disclosed that a tragedy had occurred somewhere upstream of Slaughterhouse Gulch on the north fork of the...
Additional articles that might interest you...
Picks & Pans: How to Succeed in a Small Mine, A Case History: 1990-2000
May 2001
The first requirement for a successful mine operation is a market for the product, metallic or nonmetallic. The second requirement is to deliver a quality salable product...
The first requirement for a successful mine operation is a market for the product, metallic or nonmetallic. The second requirement is to deliver a quality salable product...
Prospecting in Northern Sierra County, California
November 2006
From the mid-1850s and even into the early 1900s, Northern Sierra County boomed with mining activity. This area was flooded with miners, establishing such towns as LaPorte, Gibsonville, Spanish Flat, Whisky Diggings...
From the mid-1850s and even into the early 1900s, Northern Sierra County boomed with mining activity. This area was flooded with miners, establishing such towns as LaPorte, Gibsonville, Spanish Flat, Whisky Diggings...
Why Do We Do The Things We Do?
September 2003
For years I had studied the tempting bench high above the East Fork of the San Gabriel River. A beautiful 20-foot vertical wall of encrusted boulders, cobbles and gravels beckoned to me 100 to 150 yards up a steep slope from the river bed. They were all very promising material. The kind of rounded curves that can charm so well, and tease a grown man into risking life and limb. So, on that nearly fatal day in May, I packed a spiral wheel...
For years I had studied the tempting bench high above the East Fork of the San Gabriel River. A beautiful 20-foot vertical wall of encrusted boulders, cobbles and gravels beckoned to me 100 to 150 yards up a steep slope from the river bed. They were all very promising material. The kind of rounded curves that can charm so well, and tease a grown man into risking life and limb. So, on that nearly fatal day in May, I packed a spiral wheel...
Looking Back
January 2003
Excerpts from California Mining Journal, our original title, published 50 years ago this month.
Excerpts from California Mining Journal, our original title, published 50 years ago this month.
What To Do When Gold Recovery and Assay Values Differ
May 2018
Before going into an analysis of the ore composition, two other major factors will affect the result. These are the accuracy of the assay and the effectiveness of the mill for the gold recovery.
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