The Tangential Impulse Water Wheel in California Gold Mining History—Part I
February 2004 by Guest WriterThe modern tangential impulse water wheel, a device best suited for hydroelectric power production where high water head is available, is an ingenious device born in the historic gold mining industry of California in the 19th Century.
HPT Research recently tested their patented process for treating Acid Mine Drainage (AMD) on thousands of gallons of contaminated water at the Mammoth Mine.
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We are quite pleased to report there are some courageous miners who have taken the time to learn their rights and have gone back to dredging while knowing they could be unlawfully harassed at any time by law enforcement…
By the end of the day Sunday there were a lot of tired panners! By then they could have panned more than 14 times to make it to the end. This was not a picnic!
Ore dressing is of prime importance to the operator of a small hardrock gold mine. No, Virginia, ore dressing has nothing to do with dressing in the latest spring dresses, or the stuff that gets forced into the turkey on Thanksgiving. It refers to the method of processing ore to extract the valuable minerals contained in the rock—in the case of this series of articles, gold and silver.
Gold and other valuable metals are often deposited in breccia and rubble formed by flat or gently-dipping faults. Such faults are commonly found in areas of crustal stretching caused by the movement of tectonic plates. Flat-faults are especially common in southeast California, southern Arizona, and northern Sonora, Mexico. However, they can be present anywhere that crustal stretching has occurred.
The Bawl Mill • Our Readers Say • Buying or Investing in Mineral Properties • The Joy of Prospecting • Company Notes • Picks & Pans: Rattlesnakes in a Gold Camp • Old-Time Mining Geology Books • Ask the Experts: Recommended Reading—Part I • Consider Adding Gold to Your Portfolio • US Files Charges Against Gold Refiner • Gold in Australia • Gold in Rotten Rock • Restoring the Rule of Law to US Mining • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices