· The Fortymile supported several dredges in the eariy lOOO's. One small dredge, powered by steam and processing approximately 50 cubic yards of gravel per hour, worked its way upstream from the mouth of the river, approximately 8 miles, to the lower end of the Fortymile canyon. This dredge recovered approximately 8,000 ounces in 4 years.

The Fortymile River region in east-central Alaska has a long and colorful history as the site of the first major gold discovery in interior Alaska. Placer gold has been mined in the region nearly every year since its original discovery in 1886. Total gold production is approximately 500,000 troy ounces.

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 · As well, we have substantial holding on the richest tributary creeks in the Canadian portion of the Fortymile drainage. Early day dredge operating in 1912 on the South Fork of the Fortymile River, located in …

The Fortymile River region in east-central Alaska has a long and colorful history as the site of the first major gold discovery in interior Alaska. Placer gold has been mined in the region nearly every year since its original discovery in 1886. Total gold production is approximately 500,000 troy ounces. Although many of the rich deposits have been mined, there still …

 · dredge mining does not affect the turbidity of the Fortymile River system under the conditions studied. The highest turbidity values from the dredge areas are within 200 …

While never yielding the spectacular gold production of the Klondike River basin, the Fortymile was one of the richest gold-bearing creeks discovered before the Klondike …

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 · that the suction dredge mining does not affect the turbidity of the Fortymile River system. The highest turbidity values from the dredge areas are within 200 feet (60 m) of the back of the two operating dredges which were studied. The data show similar water- quality values for samples collected within and on either side of the dredge plumes.

 · 24 Inch PE Floating Dredge PipePE Floater Dredge PipeHDPE Pipe . The inner rubber layer of the dredged self floating rubber hose directly bears the wear and erosion of the conveying medium and prevents its leakage. The outer layer is protected from external damage and erosion, and the interlayer is the pressure layer of the rubber tube, and it ...

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This report is an account of our work testing the viability of floater dredging for placer gold in permafrost. Floater dredging is a method of mining which uses a hydraulic excavator to …

The Fortymile River is a clear water stream whose six main forks and their tributaries flow out of the Yukon-Tanana Uplands east of the Mertie Mountains and north of the Tanana State Forest. It is a major tributary of …

Description of Dredge PE Floater. Dredge Polyethylene Floater is applicable for ensuring water float of dredging pipeline of ocean,river and lake,etc.It is popular floating material.It has been alternative to traditional steel …

 · Features: 1. Light weight, easy for installation and movement. 2. The costs and performances are much better than steel pontoons. 3. Good Flexibility, excellent impact resistance, particularly suitable in the open …

Dredge Floats. Dredging Pipe Floats (Floating Ring, Float Collars) are made from high wear resistant LMDPE by rotational molding technology. Dredge floats are widely used for supporting suction/discharge hoses. The dredging pipe floats are manufactured in a bright color to act as warning signs to other vessels in the vicinity.

The Fortymile River area lies within the Yukon-Tanana lithotectonic terrane of east-central Alaska. This terrane is a mosaic of several lithotectonic assemblages, each with a coherent lithologic, metamorphic, and deformational history. Previous workers have shown that the Fortymile River area is underlain by rocks of the Seventymile, Taylor Mountain, and …

Description of Dredge Floater Dredge Floater is made from polyethylene and polyurethane closed-cell .Dredge floater can be used for dredge steel pipe and dredge HDPE pipe.It is available for providing buoyancy for …

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Dredge floaters is the important part for dredge discharge pipelines,widely used in dredging industry. Dredge floaters are made from wear resistance MDPE by rotational molding …

Dredge floats are widely used for supporting suction/discharge hoses. The dredging pipe floats are manufactured in a bright color to act as warning signs to other vessels in the vicinity. Dredge floats are also manufactured in a way that will allow them to absorb the energy from vessel collision, to protect the pipelines that they are supporting.

Features of dredge pipe floats. • Valor Pipe dredge pipe floats are usually made in yellow as a warning sign to other vessels in the vicinity. Other colors can be made upon request. • To ensure long-term outdoor use, UV stabilizers must be added during manufacture to ensure good UV stability of the dredge pipe floats. • The dredge pipe ...

 · We installed our floater dredging equipment close to the mouth and began working upstream. The ground is producing well. The gold is coarse and the purity is 86%. Bruin Creek and Herbert Creek - We also …

Dredge floater features : 1.Good Flexibility, excellent impact resistance, particularly suitable for con-structions in open sea. 2.Light weight, easy to install and handle, lower costs for moving. 3.Higher corrosive resistance, …

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 · This power would then be used to dredge the submerged reserves of the river in the vicinity. * We published a report" PLACER GOLD DREDGING USING AN EXCAVATOR AND FLOATING PROCESSING PLANT" and a video on the floater mining method for the Canada/Yukon Mineral Development Agreement in 1993. As result this report and video, …

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 · Herd size (2022) 40,000. The Fortymile herd migrates between Alaska and Yukon. It was once estimated at about 600,000, and its range stretched from Whitehorse to Anchorage. By 1974, the herd was estimated at about 4,000, and it stopped migrating to Yukon. Conservation actions, including hunting restrictions and the sterilization of wolf …

 · Detailed Guide. A major tributary of the Yukon River, the Fortymile is a clear water stream that has 6 main forks flowing east of the Mertie Mountains and north of the …

 · Fortymile River system under the conditions studied. The highest turbidity values from the dredge areas are within 200 feet (60 m) of the back of the two operating dredges which were studied. Comparison of Dredge Turbidity to Regional Values The turbidity values found in the dredge studies fall within the range of turbidity values found …

 · The small jet suction dredger is the main dredge machinery made by OCEAN Pump. The working principle of the dredge machinery is to use high pressure water pump to provide high pressure water, flush the …