Welcome to Keene Engineering! The world leader in innovative portable mining and prospecting equipment. Family owned and operated since 1950.
Rain, especially heavy rainfall or flooding, can “bring gold back” because it acts as a natural force that loosens and washes gold particles from the riverbanks and bedrock in mountainous areas, carrying them downstream where they can be deposited in more accessible locations for prospectors to find; essentially replenishing gold deposits in rivers after erosion from previous weather events.
When heavy rain occurs, the rushing water erodes the soil and rock along riverbeds, dislodging gold particles that were previously embedded in the sediment.
Since gold is a heavy metal, it tends to settle to the bottom of the riverbed, getting caught in crevices and behind rocks where water flow slows down.
Large flood events can significantly increase the amount of gold transported downstream, further replenishing gold deposits in certain areas.
So gear up and get ready for gold season!
You’ve GoT This!
There is so much more to reclamation dredging than just hunting for gold! Recent flooding has created a demand for cleaning out waterways, clearing out ponds, and dams, clearing boat slips and so much more! Ready to learn more? Read on!
—- GOLD PRICES ARE UP!!! —-
Let’s get you geared up for GOLD SEASON !
BE PREPARED!
A pool, a spa, a pond, all full. You see it time and time again in news reports of the aftermath of a devastating fire. With a Keene FireFighter you will have an invaluable tool to defend your property. Isn’t it worth the investment to have one and never need to use it? Don’t regret it, be ready instead.
Keene Engineering is very proud to present our newest member of our Sluice Box family!
The A52S Super Sluice Box is our new baby and we couldn’t be prouder! Learn what all the buzz is about by watching our video then get yours before there is a waiting list!
WHAT’S HAPPENING…
This is the raw DW3 cross-linked polyethylene lower box we’re currently scanning.
By capturing a precision 3D scan, we can generate highly accurate CAD drawings. These CAD models allow us to refine our cost analysis, ensure consistent production tolerances, and maintain tight cost controls. It’s a crucial step in producing a cleaner, more efficient design and guaranteeing that every DW3 unit is built to exacting standards.
I'd love to sell your gear. The gear I use personally....
This tech in 2026 will be obsolete, something is coming youtu.be/hFSMhUQ5Lr8?feature=shared
This is the raw DW3 cross-linked polyethylene lower box we’re currently scanning.
By capturing a precision 3D scan, we can generate highly accurate CAD drawings. These CAD models allow us to refine our cost analysis, ensure consistent production tolerances, and maintain tight cost controls. It’s a crucial step in producing a cleaner, more efficient design and guaranteeing that every DW3 unit is built to exacting standards.
Machining a new batch of our RC46 Rock Crushers is underway.
We’re moving through each precision step—boring, milling, facing, and final tolerance checks. Once this stage is complete, the components go straight to heat treating, where they’re hardened to withstand extreme impact and abrasion.
This process is critical for durability and long service life, especially for the high-stress parts like the jaws, hammers, and impact surfaces. After heat treat, we’ll move into finishing, assembly, and final QA before shipping.
I’m very interested in this crusher !
I worked mine to death! Need the double roller unit now
We have one RC46DR left in stock; then we will be out for a month or so. A lot of heat treating, and it takes time.
I have an older trailer mounted RC46. Great crusher even after all these years! 👍
Working on another 8" Super max with a 40 hp Vanguard. This is just the raw floats laid out and the beginning of the frame.
Hey Pat, can you get an approximate weight for the 8” Supermax? I’m considering having my dredge helicopter dropped and I’m needing to know the weight.
Wondered if you guys would come check out red dirt nation on YouTube lots of guys have questions about dredging equipment I also would like to hear your opinion of something I’m working on as far as a hobby dredge. Super secret squirrel stuff here…….. lol. Come in the room ask for Travis
I want to turn my 8 in into same for the sump twin 3 in or twin 4 in I'm thinking 20in wide or more for two boxes not just for fine gold but if I'm overloading want the side boxes to take the slack like 30 y a hour
Or more
Pat and Mark take after their Pop's! Engineering and Marketing Geniuses. Their Factory in North San Fernando Valley is un-freaking-believable!!! I was given a tour by the two, top mining pros in the World, in 2006 and never imagined all the work and logistics it takes to produce one 6" dredge! Amazing! Their Equipment is pulling diamonds out of rivers right now in South Africa, Gold out of Peters Frozen Ass Creek just North of Anchorage Alaska, Sucking up Nuggets in Nome on Cable, and providing Dinner with their 151 Dry-Washers in Randsburg CA and Gold Basin AZ! The Chinese have tried to duplicate it but Pat is always ahead of any Global Competition with ongoing, in the field testing and basic back breaking work. Miners earn every flake they discover. I still have the dredge from 1980 Pat sold our Family before they moved to their new location. Except the floats. The South Fork Koyukuk River at the mouth of our minesite Davis Creek, took both stored floats down to the first Village at High Water! 11 jet boats also since 1980!!! I think our friends down in Bettles Field are taking good care of them.
Keene built this 8 inch for my dad in 1969. My dad had the print shop from your shop many moons ago. Photo was taken on Goodyears Bar, just beforeDownieville CA.
We should be ready to ship the current orders in just a few weeks, with new orders following in about 3–4 weeks. Production is moving along nicely, and we’re making a few subtle refinements to streamline assembly and make adjustments even easier for the end user.
We’re currently waiting on the aluminum legs to arrive, and today the team is cutting material for heliarcing the riffles. Everything is coming together smoothly, and the final production units are looking great.
Most people never see the road it took to get here. At one point we had a full graveyard of prototypes—dozens of ideas, versions, and failures. This small handful you see now is all that’s left of the cemetery; everything else has already been scrapped. Each one taught us something, and that’s why the machine performs the way it does today.
when it's official ready for purchase
We are taking orders now. My first batch of 6 is sold out, and I am working on a second batch of 24. Plus the first 6
My corner of my shop was the what didn’t work area. Making stuff work comes with those corners.
Building a better mouse trap isn't easy it takes time and also a lot of money but in the end you get something that really works well so thank you Keen Engineering for your products
Can’t wait to give it a try!
You hear all the time that having the right product, process and people are the keys to success, and that’s why Keene Engineering is on the top rung of the ladder for quality mining equipment.
This is a low-cost fix for the 263 air fan shrouds. Take a medium coffee can and make some modifications. A resourceful customer sent this to me, a new shroud from Gast is $185.00
Hey I built my smoke cannon from a floor vent and a tinkering it was funny to see but it worked than I had professional builds for the sales model. Still used as a weld smoke extraction units on railroads to day.
I experienced a 263 fan shroud failure this summer on my buddies dredge, looked at it and said well thats stupid, why dont they just oversize the washer to spread the clamping load on the shroud to prevent that
What kind of pump is that
didn't even have one on ours years ago, but it is a good idea because they get damn HOT.
The DW312V-MAX is in production now. We’re making a few minor refinements to the dead-air space in the riffle board. The dead-air design worked incredibly well at holding on to the fines, even when the machine wasn’t perfectly dialed in, making the system far more forgiving. Our dead-air space still allows air to flow between the cloth and the blocked-off polycarbonate, giving full airflow on the main cloth and about 50% airflow under the dead-air zone.
We also vary the spacing on the dead-air sections to make the machine perform consistently across a wider variety of conditions. This tuning helps balance airflow, lift, and fine-gold retention—whether the material is damp, dry, heavy, or inconsistent. These small fine-tuning adjustments make a big difference at the end of the day.
We have a few more ticks on the recovery box; we will share later.
Hello Pat and Mark. I want one.
On my 160 I added miners moss and door screen to the last 2 riffles, really seemed to help with the ultra fines.
Mark!!!!!! Please let me be the first one with the DW3!!!!!! 💪🔥🙌 it’s all I need in my arsenal 🤩✨ I got 6oz in 4 months ONLY using Keene Engineering, Inc. Products ⛏️✅ Pat saw how worn down my magic fingers were at the nugget hunt he personally gave me some “red white and blues” 🔥🔥🔥 if I can be one of the first it would be an honor 🙌 I better order now 🥵🔥🔥🔥
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I want one as well!
The DW312V-MAX is almost here! Makes drywashing FUN
We’re excited to announce that the new DW312V-MAX will begin shipping in just 2–3 weeks, right on time for the holiday season. This model is also available as a complete bundle, making it the perfect setup for anyone ready to hit the desert with a lightweight, powerful, and fully upgraded dry washer.
Patrick and I are gearing up to head back out for more field time with the final production version. We’ll be shooting new videos, showing how the machine performs in real-world conditions — and let me tell you, this model truly brings the fun back into drywashing, especially for us “older guys” who appreciate lighter gear that still packs a punch. Let's not forget under 30lbs. This 4 lbs battery ran the machine for 2 days. Draws only 1 amp or less.
How long will it run the minimax power sluice?
How about the new 5-6 floats you were talking about is it true?
How much will this one cost?
$1350.00
I ordered one!
Is there any possibility of adapting an existing DW212 puffer dry washer to the new type unit? I love my DW212 and use it all the time.
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 $425.00!
We are extremely excited to present the next generation of a dredge designed for the recovery of super fine gold
This Super Mini Max Power Sluice Concentrator unit is the most versatile package that we have ever offered.
NOW OPEN TO THE PUBLIC!
