Garrett Electronics - trusted by real miners & prospectors!

Magazine

Prospecting & Detecting

Dredging Tips and Tricks: A Measure of Water Pump Efficiency

…as an academic argument, when mated to the appropriate engine, is the pump really moving water at the rate of 400 GPM?

Online access required. Please .

Add a Comment

Additional articles that might interest you...

Trash! A Hindrance Or Hot Spot For Hidden Gold?


I love it when I am in the middle of a high trash area and all the ferrous bars go away, the screen number goes to a three or an eight, and the meter is forty to a hundred. I don’t know for sure that I have found gold, but it narrows the odds down.

The Summer of ‘81


When it was all setup and running, you had everything coming off the dredge riffles into the boil box. At the hole section, some of the water got sucked down and pulled a lot of black sand and over heavies…

Piles of Gold


These gritty clay lines were only a quarter of an inch up to three inches wide. Once the line had been laid out, they would look at the wall of gritty clay material and seek more indicators.

Ask The Experts


Designing my own dredge...

Ophir—Possibly the Best Kept Secret in Alaska!


...I decided to excavate the semi-frozen high-bank that was resting on a soft shale bedrock footing. Within three feet, I encountered an intrusive!

Drywashing for Desert Gold—Part II


…whichever layer I’m getting the best gold, I’ll work that stratum. Some of the best gold in the desert is not always on the bedrock.

Blackberries and Gold


There were iron stains all over and even a few places where I could see iron trash sticking out of the bedrock. These would be ideal spots to start with as the gold travels with the iron and lead.

Subscription Required:
The Bawl Mill   • Ask The Experts - Where can I obtain chemicals for flotation?   • Ask The Experts - Can I get an update on your efforts in DC?   • Ask The Experts - What equipment do I need to enter an old lode mine?   • Hard Work Pays Off On Hard Rock   • The Mysterious Telluride Minerals   • Detecting: Getting Away From The Heat And Into The Gold   • The Coolgardie Gold Mining Camp of Southern California   • Gold Prospecting for Better or Worse: How Curiosity Burst My Platinum Bubble   • Prospecting for Copper—What to Look for on the Outcrop   • Hard Rock 101: Small-Scale Blasting   • Melman on Gold & Silver   • Mining Stock Quotes and Mineral & Metal Prices

Free:
Legislative and Regulatory Update   • PLP Update   • Reminder: Annual Claim Filings Due

Advertisements

Precious Metals Recovery plants and equipment
Fighting to keep public lands open to the public
Specializing in the processing of precious metal ores!
Watch prospecting shows on your computer right now
Free Online Sample Issue