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Studies of Suction Dredge Gold-Placer Mining Operations ...

Studies of Suction Dredge Gold-Placer Mining Operations Along the Fortymile River, Eastern Alaska USGS Fact Sheet FS–154–97 October 1997 U.S. Department of the Interior U.S. Geological Survey The U.S. Geological Survey (USGS) and the Alaska Department of Natural Resources (AKDNR) are investigating the environmental geochemistry of the

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Studies of Suction Dredge Gold-Placer Mining Operations ...

Studies of Suction Dredge Gold-Placer Mining Operations Along the Fortymile River, Eastern Alaska The U.S. Geological Survey (USGS) and the Alaska Department of Natural Resources (AKDNR) are investigating the environmental geochemistry of the Fortymile River drainage area in eastern Alaska. This river is designated a Wild and Scenic

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Placer Gold Mining in Alaska — Cooperative Studies on the ...

Effect of Suction Dredge Operations on the Fortymile River Background Alluvial gold was first discovered in the Fortymile River Mining District (FMD) in 1886 and has been placer mined there ever since. Essentially all of the mining in FMD has been placer. During the life-time of the district more than 500,000 oz of gold have been produced.

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Gold Suction Dredge Gold Mining Bucket Dredge Shell ...

And his dyslexia helped him create a revolutionary dredging system that has been used in gold mining operations across the U.S., and in Costa Rica, Peru, Canada, and Central and South America. Shell Dredging has deep roots in placer gold mining, dating back almost 50 years when the company’s first suction dredge was engineered and built.

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Water Board Explores Suction Dredge Mining in Wild Rivers ...

Jan 29, 2021  The good news is that the Water Board is proposing to prohibit suction dredge gold mining on most rivers which are polluted by toxic mercury – a legacy of the state’s historic gold mining era. Mercury was used to separate out the gold, but much of this toxic metal ended up back in the rivers.

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Placer Gold Mining in Alaska — Cooperative Studies on the ...

Effect of Suction Dredge Operations on the Fortymile River Background Alluvial gold was first discovered in the Fortymile River Mining District (FMD) in 1886 and has been placer mined there ever since. Essentially all of the mining in FMD has been placer. During the life-time of the district more than 500,000 oz of gold have been produced.

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Suction Dredge Mining — Rogue Riverkeeper

This type of mining traps and kills young fish and eggs, smothers spawning gravel for salmon, and stirs up legacy mercury from historic mining operations. Between 2009-2013, southern Oregon saw a huge increase in suction dredge gold mining operations on the Rogue and in surrounding tributaries.

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Gold DREDGES for Sale - Keene - Mining Equipment, Gold ...

Have a question about gold dredging or which suction dredge might be right for you? Call Gold Fever TOLL FREE: 1-888-985-MINE (6463) We have everything from lightweight portable 2" inch back pack dredges, highbanker/dredge combos and power sluices to commercial gold dredges. Scroll down and select any model below to review our most popular dredges.

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Parkplanning - Gold Run Mining Plan of Operations (Fiehler)

The National Park Service (NPS) is considering a mining plan of operations (MPO) which has been submitted by Vern Fiehler of Chisana, Alaska, for the purpose of conducting a suction dredge placer gold mining operation on the Gold Run group of unpatented mining claims located in the Gold Hill area within Wrangell St. Elias National Park and Preserve (WRST).

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Gold Prospectors of the Rockies - Suction Dredges

The Use of Suction Dredges in Colorado From the Colorado Division of Minerals Geology T he Division of Minerals and Geology regulates mining and prospecting operations in the state of Colorado under the auspices of the Colorado Mined Land Reclamation Act and the Hard Rock/Metal Mining Rules and Regulations of the Mined Land Reclamation Board.

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Gold mining - Types of mining - Gold - Information about ...

Large-scale slucing operations usually emply screening plants, or trommels, that remove larger alluvial materials (e.g. gravel and boulders) to prevent them from getting into the sluice box. Suction dredging. A suction dredge consists of a sluice box attached to a suction hose.

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Proline Gold Mining and Prospecting Equipment/Gold Dredges

The 6" dredge is ideally suited for use as an exploration and sampling unit for larger mining projects and is also capable of being the primary source of gold recovery in smaller operations. In our opinion, the 6" is the largest dredge that can be effectively operated by one man, however, a two-man team would allow the dredge to be used to its ...

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Gold Dredge Dredging Equipment Diamond Dredge DOVE

DOVE is a major manufacturer of highly efficient Dredging equipment, for river mining of Gold, Diamonds and other minerals.. DOVE powerful Dredges are produced in five standard models with various various capacities range of (80 m3/Hour -1000 m3/Hour) and depths of 8 meters to 50 meters (26.2 ft. – 164 ft.), or (8.74 – 54.68 yards).

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Gold Dredging - 911metallurgist

Feb 14, 2017  The working of gold alluvial deposits by dredging has from all times been a popular form of mining, not only from the simplicity of its operations, but also, in its more primitive stages, from the possibility of carrying it on without large capital, without skilled labour, expensive plant, long terms of preparatory work, or, in fact, any other requisite than a shovel, a dish, and a stout pair ...

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Comments on Montana’s General Permit for Suction Dredging ...

Mar 31, 2015  Montana’s general permit for suction dredging is for smaller operations with a nozzle of 4 inches or smaller. Larger operations must apply for an individualized discharge permit that contain more specialized, site-specific mitigation protections. However, even small suction dredge operations can create significant local impacts.

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Comment Letter - Suction Dredge Mining

short distance downstream of a suction dredge where turbidity levels return to normal” (CDFG, 1997). 6. There seems to be some concern in recent years concerning elevated water temperatures where suction dredge mining occurs. Suction dredges have no means of adding heat to the water column. They simply take in ambient cold water and discharge it

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Review of the Regulations and Literature Regarding the ...

A recent phone survey of suction dredge permitting offices of the Alaska Department of Fish and Game (ADFG) and the U.S. Bureau of Land Management established an estimate of the number of suction dredges typically mining on all Alaska streams in the" late 1980's and early 1990's (Table 1) .

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Gold Equipment for Sale - Gold Mining Dredge Dredge For Sale

The 15” dredge handles an average of 400 cubic yards of material per hour, or 9,600 yards per day. The unit digs by sucking water and gravel through a 15-inch pipe. A unique “Jet Principle” moves the material without use of a sand pump. The water and gangue material are

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Sand Extract Cutter Suction Dredger 10-20m Dredging Depth

High quality Sand Extract Cutter Suction Dredger 10-20m Dredging Depth from China, China's leading Sand Extract Cutter Suction Dredger product, with strict quality control 20m Dredging Depth Cutter Suction Dredger factories, producing high quality 20In Suction Dredger Ship products.

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Suction Dredge Mining — Rogue Riverkeeper

This type of mining traps and kills young fish and eggs, smothers spawning gravel for salmon, and stirs up legacy mercury from historic mining operations. Between 2009-2013, southern Oregon saw a huge increase in suction dredge gold mining operations on the Rogue and in surrounding tributaries.

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THE WESTERN MINING ALLIANCE Suction Dredging for Gold

metals in suction dredging operations is a ... Support suction gold dredging and help rebuild our economy and preserve our western heritage. ... [Ref BLM Mining Claim Database] Suction gold dredging and related activities occur throughout the State but are concentrated in the gold bearing areas of the State known as the Motherlode. ...

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» Suction Dredging

Suction Dredging for Gold. Fast Water Dredging. Teamwork in Production Gold Dredging. Outfitting a Suction Dredging Project. Boulders Winching Techniques. Double-screen Classification on Suction Dredges. Underwater Suction Mining Without the Use of a “Suction Dredge!”. Underwater Blow Mining in California Without a Suction Dredge!

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Gold Prospectors of the Rockies - Suction Dredges

The Use of Suction Dredges in Colorado From the Colorado Division of Minerals Geology T he Division of Minerals and Geology regulates mining and prospecting operations in the state of Colorado under the auspices of the Colorado Mined Land Reclamation Act and the Hard Rock/Metal Mining Rules and Regulations of the Mined Land Reclamation Board.

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Gold Panning and Dredging Information - USDA

Recreational Dredging A mining dredge is a device which "vacuums" up water and gravel from a stream or river and then directs the discharge through a riffle box where gold and other heavy objects are trapped. A recreational scale dredge setup commonly consists of a water pump driven by a small gasoline engine and a riffle box.

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Placer gold mining in Alaska : cooperative studies on the ...

Get this from a library! Placer gold mining in Alaska : cooperative studies on the effect of suction dredge operations on the Fortymile River.. [L P Gough; Geological Survey (U.S.);]

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Suction Dredging and High Banking for Gold Cascadia ...

Apr 16, 2018  Lawsuit Launched to Protect Washington Rivers, Salmon from Destructive Suction Dredge Mining. Harmful Gold-mining Method Already Restricted in California, Oregon For Immediate Release, January 10, 2017 Contact: Gabriel Scott, Cascadia Wildlands (541) 434-1463 [email protected] Jonathan Evans, Center for Biological Diversity, (510) 844-7118, .

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» Compilation of Published Findings on the Effects of ...

Compared to the 2413 (in-stream) cubic yards re-located by suction mining operations the movement rate by suction dredge mining would equal about 0.7% of natural rates. It has been suggested that a single operating suction dredge may not pose a problem but the operation of multiple dredges would produce a cumulative effect that could cause harm ...

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Gold Equipment for Sale - Gold Mining Dredge Dredge For Sale

The 15” dredge handles an average of 400 cubic yards of material per hour, or 9,600 yards per day. The unit digs by sucking water and gravel through a 15-inch pipe. A unique “Jet Principle” moves the material without use of a sand pump. The water and gangue material are

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» Teamwork in Production Gold Dredging

The amount of streambed material that you are able to process through a gold dredge will determine the volume of gold which you will recover. Actually, this is true of any type of mining operation, whether it be a large-scale lode mine or a small-scale gold prospector using a gold pan.

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The Legal Maze of Small-Time Gold Dredging in Alaska ...

Apr 14, 2018  Nome has been the epicenter of gold mining in Alaska since the Alaska Gold Rush blasted off in 1898. The era of "Wild West" operators was over. ... Suction dredging is tricky business. ... But these areas are limited to small-scale operations, in seabeds with limited gold deposits.

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The Gold Dredge - Keene Eng

The Surface Dredge. As the heading ofthis section implies, surface dredge floats on the surface of the water. The material is pumped to the surface through a suction hose into an efficient sluice box that is capable of recovering extremely fine particles of fine gold. The sluice box can either rest on the bank, or float on the surface of the water.

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» Search Results » suction mining

It has a drawing of an old prospector panning and of a modern suction dredge in operation on the front of the card. Both sides of the card are full of scientific and geological information about gold. It also tells about the history of gold mining in America. The vial of gold gets glued on the front of the card, with clear silicone rubber sealant.

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Suction Dredge Mining Reform in Washington State Trout ...

All streams in Washington are currently open to suction dredging, including designated Critical Habitat for threatened and endangered salmon, steelhead, and bull trout. The “Gold and Fish” regulations fail to protect our native fish.

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