Welcome to Keene Engineering! The world leader in portable mining and prospecting equipment.
Family owned and operated since 1955.
OPEN MONDAY THROUGH FRIDAY!
Open Saturdays by request and appointment only. Hey, we want to get out there and do some digging too!
Do not hesitate to call if you need to pop in on Saturday. We will be more than happy to accommodate your schedule!
Now you can…
Time For Some Good News!
Take a minute to read this very exciting article by Shannon Poe at the American Mining Rights Association!
HOT OFF THE PRESSES!
Get your copy of the new Keene Catalog! Click HERE to request your copy today!
WHAT’S HAPPENING…
A great new product the Jabbit sluice stand. Easy sluice set up even in adverse conditions.The Jabbit Sluice Stand is the only deep water, self-driving sluice stand available. The perfect companion for the Keene A52, A51, and MiniMax Sluice. Simply...
This is a new video on using the Mini Max sluice box on it own. This is just one part of the Mini Max package. This is the Ultimate in a versatile package from a beginner to a professional.
youtu.be/VUdjzZ9Xt68The Mini Max Power Sluice Concentrator is one of the most versatile packages that we have ever made. Whether you’re working in river banks, desert placers or...
Living in Southern California, there aren’t too many places to sluice anymore due to NO RAIN and little water in creeks & rivers. I MISS sluicing
Awesome!! Video !! Looks like Fun and Pat Keene is the man !!!
I like that.
4" Keene Sluice Fine Gold Upgrade (Review)
I called Mark Keene with a question about making the 4" "Mini" a better gold recovery machine. He was working on an improvement of screen sizes and a new configuration. Mark asked me to test and compare the results and give him an honest answer. The "4" Kit" came with a new set of riffles, a longer upper screen/scrubber and another screen for the lower fine gold recovery area. It allows a nugget trap and the finest gold recovery I have ever seen. I was impressed after trying the rubber molded mats on the market. Mark's configuration will catch and keep the gold on start up/shut down and plug-ups, LOST by the rubber mat method. This Keene 4" upgrade kit is worth every cent. It recovers down to micron. No other can touch Mark's new design. The end of the sluice is no longer a void where gold could be lost. It has excellent recovery from header to the bottom of the sluice. Honest answer to Mark: This system is "forgiving" compared to the rubber mats. 2-X the recovery vs rubber mats. If I am wrong, I'll buy you a beer! Worth the upgrade! I did mod it out a little from the kit, but I do that anyway.
The install was very easy. I am including pictures. I did add "miner's moss" and a heavier, first 6" of rubber matting (drilled and capped with crown nuts for securing) for more aggressive recovery and more expanded metal (mod). I added an old piece of matting (old blue matting) under the miner's moss to reduce height for easier clamping down. I can run it with an aggressive rate of water (slope) to prevent overloading the sluice with maximum recovery. I ran 3 test pans of tailings with no visible gold in my pan. Impressive! The mat method results were 25-50% loss in recovery (tested by me). I wasted $$$ on mats before going back to the Mark Keene, asking for a solution. This is it! Thank you Mark for your excellent customer service and carrying on a long tradition of excellent equipment.
BTW, this is one of my 6+ dredges I have purchased since 1984. Not one has let me down. Great job Mark Keene and Keene Eng.
R/, Billy Page
Charleston SC / Ga. gold miner
What's this compare to an over under? I'd assume it wouldn't be as good?
I’ve used it, it aggravates me to see how small the gold this set up catches! Lol mercury much
Or 5 inch box
Is this sluice bether than the 3 stage?
Nick Garza
Will you make that in a 6 and 8 inch box?
An impressive cleanup.
If you have any spare gold you’d like to send my way I’d be okay with that
Very good. I like my clean up as well on NF American.
Dredging ?
No that's somewhere esle it's off keens site
I think you should do a competitin Guess the weight and win a free few grams 👀
Come on, work out that black sand. 👍😊
Very impressive.
Yes, impressive! XxOo
Bradley Dover is that icconi or where bro
This is a modified 4" dredge with a sump installed. Our customer dean did a great job. He is running Keene P180 pump with a taller impeller and altered GX200 Honda producing a few extra horsepowers. To be honest, I did not think he would have enough power to drive the sump system. Just a few additional RPMs on the larger impeller made a much bigger improvement Than I thought. Sometimes it is good to be wrong.
Our dredging trip to Idaho went great. You sent me the bigger impeller and machined the housing for the 180 pump and wow did that thing pump. Ran the highly modified Honda GX200 at only 2750 RPM and it was more than enough to have awesome suction at the nozzle plus it ran the other jet for the sump. Here’s a video of the dredge running and I’ll send you the final video I’ll put together next week of our entire trip.
Correct me if I’m wrong but I was told you never put your hands in your box unless your clearing away large rocks only if the speed of your hand is going as fast and in the same direction of the water
How much is it for the sump box add on at the end of be sluice?
Is a sump something new?
Matt Hospodar
Michael Carr
Why is it a problem to run Gold Hog matting? The purpose of the sump system was to determine how much gold if any was getting past the Gold Hog matting. Every day we ran for a minimum of 6 hours with the only clean out at the end of the day. After determining how much was in the secondary sluice vs. the primary sluice there was never more than 2% of the gold by weight. 95% of the gold in the secondary sluice was smaller than 250 mesh. I used to use the standard sluice configuration but will never use anything but GH Matting. Here’s the complete video of our trip. m.youtube.com/watch?v=zqbY6BUaQQQ
Chris Pritchard
This is some of Patrick's gold, just a little over a once so far. He still has to clean up his finds.
Damn !!! Awesome !!! I’m going to have to go on one of these Patrick Keene trips !!!
Aw man . . . We just got into Campville. Would of loved to prospect with Mr.Keene!
Fantastically cool - sorry we missed this year.
Nice little handful!
Must have dug up the area that Heather Willis was sitting on for that much gold. lol
EYEZ LOVE DAT GLOW♡☆
How long did he run?
Alright Pat..
Mine mine mine mine
Nise
Talk about a view when dredging!!!
Idaho
Patrick Keene What is this? Sand dredge for clearing out the bottom or is it a YUGE gold dredge ? ...and hows the engine coupled to the pump?
Let's take it to the Sewa River Kono and Kenema Semmi River
Belt drive: a mechanism in which power is transmitted by the movement of a continuous flexible belt.
Looks like dinner delivery while dredging
What River is that??...Looks like Nevada
How deep were you going?
Daniel Cowin
WHAT’S HOT!
New and Improved Super Concentrator with an even better price!
We’ve made it next to impossible for you not to add this little power house to your prospecting arsenal at only $350.00!
We are extremely excited to present the next generation of a dredge designed for the recovery of super fine gold
Model 6220SMAX
This New Super Mini Max Power Sluice Concentrator unit is the most versatile package that we have ever offered.
Model MMPSCK
Keene's HydroAir Sniping for gold on the Yuba with Pat Keene
Pat Keene’s annual trip to the Yuba River…
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Keene HydroAir 12 Volt Hookah System
https://www.youtube.com/watch?v=BcMMiVCO_ds HydroAir Battery Powered Diving System - HAS…
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Keene 151 old style compared to a New 151S
I recently purchased and installed the Upgrade Kit…
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