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Keene 4" Suction Gold Dredge

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Keene 4" gold dredges are the workhorses of the industry. A 3" dredge can be expected to process up to 1.5 - 2 yards of gold bearing gravel per hour* but a 4" dredge can be expected to process up to 3 yards per hour*, an increase of 50% to 100% in your ability to process and recover gold. Once you are into the gold it is the volume of gold bearing gravel processed that decides whether an operation is profitable or not. The Keene 4" gold dredge also gives you a choice of recovery systems. You can choose a basic sluice box such as is used on the smaller Keene dredges. This is lighter in weight with fewer parts and allows for quick, easy cleanups. You can also choose the famous Keene 3-stage box since the 4" dredge is the smallest dredge to offer this big dredge feature. The 3-stage sluice offers enhanced fine gold recovery, and the more hours you operate, the more important this will be. Keene 4" dredges of course feature their oversize powerjet with quick coupling system. This dramatically reduces clogging and in the rare event of a clog, allows for quick and easy access to the hose.
Keene 4" Ultra Gold Dredge
Keene 4" Ultra Gold Dredge
This 4" Ultra is designed as a lightweight, compact 4" dredge for those wanting to minimize cost and complexity. The Ultra 4" is based on the Keene 3" design with a wider box and larger motor and pump. The 4" Ultra is perfect for the person constantly on the move who wants a less expensive lighter weight 4" gold dredge. Those involved in longer term operations in one location should consider the 4" deluxe 3-stage models below.

Our 4" dredges all now come standard with 20 feet of suction hose so you can reach farther and move the dredge less often.



Features for the 4" Ultra Dredges
bulletThe flotation is extremely light and compact and can be assembled or dismantled in a matter of a minutes. The floats have built in storage indentures providing a place for your tools, mask, rock pick etc. The floats have stringers, or "runner bottoms" for fast water and rock laden bottoms.
bulletThe dredge is equipped with Keene's powerful P180 300 gpm pump with oversized pressure hose. This motor and pump combination is ideal for the 4" dredge offering the best combination of power and portability.
bulletThe 16" X 40" sluice box has rolled top edges, tapered sluice design, longer classifier screen and improved riffle design for superior recovery. Equipped with ribbed black rubber matting, for quick identification of values, under a longer classifier screen.
bulletThe Marlex Jet flare is built with a longer straight section and flare making it possible to use a shorter power jet to reduce weight. The jet flare design also improves fine gold recovery and increases suction power. The jet flare also makes the dredge easier to set up in shallow water conditions. The sluice box can also be set independently on a flat area next to the water.
Part Number Engine Type Compressor Weight
KE4400PH 5.5 hp Honda GX200 None 170 lbs.
KE4405PH 5.5 hp Honda GX200 T80 180 lbs.

Keene 4" Deluxe Gold Suction Dredge with 3-Stage Sluice

Keene 4" Deluxe Gold Suction Dredge with 3-Stage Sluice and Full Size Floatation System
Keene's deluxe 4" dredge has all the features of the larger professional dredges. This is the most popular 4" dredge in the world! The 4" dredge is ideal for the prospector requiring a light portable dredge with capacity to move large amounts of material. Experience the professional 3-stage recovery features of Keene's larger dredges. Experience fine gold recovery, in a lighter and more compact dredge that will out-perform any double or triple sluice on the market. The 4" Deluxe also features a four piece modular marlex frame and float assembly for better stability in fast and deep water. The floats have recessed tool and hardware holders molded in their tops. And although when assembled you have more floatation than the 4" Ultra because it breaks down into four separate floats instead of two each float alone is easier to handle. However, as good as the frame and floats are it is the 3-stage recovery system that steals the show on the 4" Deluxe gold dredge.

Keene Three Stage Sluice Box

Features of the Keene 4" Deluxe 3-Stage Gold Dredges

bullet3 stage sluice box for unsurpassed fine gold recovery. The best in the business !!!
bulletThe pump has proven to be the one of the highest performing pumps on the market.
bullet4" floats with built in tool boxes and drink holders with bottom runners for rocky rivers and fast water.
bulletFloat frame with handle inserts, ideal for picking up and carrying dredge through fast water conditions.
bulletThe adjustable jet flare can be raised and positioned at frame level for transporting through rapids and shallow areas.
Part Number Engine Type Compressor Weight
KE4500PH 5.5 hp Honda GX200 None 228 lbs.
KE4505PH 5.5 hp Honda GX200 T80 239 lbs.


Keene Oversize Powerjet with Quick Coupler System
Keene Oversize Power Jet with Quick Coupler System
We have taken the standard Power Jet and created a more efficient, easy to use and overall superior jet! The new design involves a slight enlargement of the jet tube, making it a bit larger than the interior of the suction hose. The result of this modification is a smooth, seamless flow from hose to jet. Rock jams and other obstructions are virtually eliminating downtime. The quick coupling features two side mounted snap levers for quick and easy joining.
*Yards per hour are estimates only and can vary depending on the size and shape of the rocks and gravel and how hard the material is packed. Operator expertise has a large impact on the amount of gravel a dredge can process due to more experienced operators being more efficient and less prone to clogging the dredge.
AMDS has Keene suction dredges for gold and other valuable minerals. The suction dredge is the best method for the small miner to recover gold from underwater deposits. Gold dredging is a relatively inexpensive method of mining for small one or two man mining operations, and can provide reasonable returns for the hard-working miner. Keene Engineering is the oldest and largest manufacturer of portable suction gold dredging equipment. Note: the State of Alaska requires a permit for all suction dredges operating in the State of Alaska. See our Suction Dredging Regulations page for details.
Alaska Mining & Diving Supply is a dealer for Keene gold dredges. Contact Us! for more information on how to purchase your new Keene gold dredge.


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Prices are F.O.B. Anchorage, Alaska unless otherwise noted. All prices and specifications are subject to change without notice.
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