Keene Engineering, Inc.

Keene Engineering, Inc. Dedicated to providing you with the finest Mining and Prospecting equipment for over 70 years! http We at Keene Engineering view our customers as family.

Keeping in touch with our community and sharing stories is half the fun of prospecting so feel free to share! Send us pictures of your treasure hunts or gold finds at [email protected]. Our CEO, Jerry Keene, loves to hear from you, as do we!

We’re finally getting a big batch of DW312Max dry washers out the door. It looks like we’ll have a dozen-plus units ship...
05/19/2026

We’re finally getting a big batch of DW312Max dry washers out the door. It looks like we’ll have a dozen-plus units shipping this week.
We really appreciate everyone’s patience. Demand has been heavy, but we’re making steady progress and getting machines built, tested, and shipped as fast as we can. More are coming right behind this batch.

Gold Prospector. The answer to when dredging will be allowed again in California is simple. It was never disallowed. Per...
05/11/2026

Gold Prospector.
The answer to when dredging will be allowed again in California is simple. It was never disallowed. Personal dredging permits are never going to be allowed again because they were an illegal scheme exposed by the Karuke ( probably spelled wrong) Tribe. The scam, California created a recreational mining class in the 90s under the guise of protecting fish habitat. The scam put the fish and game, now called the state fish and wildlife in charge of this new class of recreation and allowed the fish and game to monetize the recreation which they did by offering personal permits for a person to use a dredge in any allowed waterway in California and only for certain times of the year. This practice by California broke several laws under the mining laws and California's own laws. The Karuke ( again, probably spelled wrong) was not happy with the folks up at Happy Camp, apparently and decided to do something about it. They sued California and won . Why did they win? They won because California did not subject the personal permits to the same standards as a property permit. If a person under a commercial property permit wants to activate a mining site they have to go through several processes. They first have to identify any environmental impacts that mining would cause on the land or water way . Depending on the sites an EIR might be necessary. California law requires this for any commercial activity no matter what the new activity is. Federal laws also require the states to oversee and regulate and enforce mining law . By California allowing people to mine by dredging under a personal permit without going through this process broke not only state laws but also federal laws. The only way California could get away with issuing personal permits to mine/dredge is for them to go through the commercial process on any area they allow the activity. No problem right ? After California lost they put a moratorium on issuing personal permits for recreational mining in California. At least until they could figure out what to do. Once they figured out that California couldn’t afford to go through the commercial process that they require of commercial mining they made the ban of personal permits permanent. This is where we get the moratorium of dredging.
However, dredging is not and has never been illegal in California if you go through the process of becoming a commercial miner and get the proper property permits for your property. It is illegal for California to stand in the way of mining when done properly.
Your property permit/mining rights have not been interfered with.
Just like your drivers license, fishing license or hunting license, the dredging license always could be taken away because it’s a personal permit.
Mining laws and rights are about property rights, not personal rights.
Dredging is still legal in California and the rest of the states .
And this is why the small mining industry really needs to get back to the basics of mining districts and fund education to small scale miners so we know how to stay legal and claim our rights at the table to keep the other entities favorable to mining. Mining districts are a part of mining law and have equal powers under the law equal to fish and wildlife or the water board , but the only way to claim that right back is to utilize it and fill the mining districts with members willing to fund the district.
How do I know this ? My name is Robert Guardiola, and I have been to almost every “dredging “ hearing and have been in personal meetings with several clubs and government officials and several phone and zoom calls with both. If you go to the last Zoom meeting on Californias water board site you will hear my discussion with the water board and their attorneys, you will also hear the California attorney correct the water board chair that I was correct when I layed out the process of legal dredging under commercial property permits.
I did not solve this on my own, it was a collaborative effort of the local mining association I was president of and many other leaders in our community. The person who helped me the most, I don’t think he will mind me giving him credit? Was Kevin Bell , Kevin worked in the water industry for most of his life and definitely knows his way around the water laws and applied his expertise to the mining industry in which he is still active. The other person I would also give Credit to , although the enemy of our cause , is Senator Ben Allen , why Senator Ben Allen , because he let the cat out of the bag which helped me send our team in the right direction to search. It was at the hearing AMRA spearheaded to try to define the definition of a dredge . It was that hearing when I knew that no matter what equipment we used ,California couldn’t issue a personal permit.
I can still see old Ben, looking down on miners from his perch in the prominent seats . And I understood that even he didn’t understand what the law actually was.
I forget who just finished speaking, but he looked down on U.S. miners and said “ Be Careful, otherwise we’ll make you mine under commercial laws “
Right then I knew why they always referred to dredging as recreational!
And I knew that we probably would never get another recreational permit to mine , it is just not cost effective for neither the state or miner to comply with that big of an EIR 🤷‍♂️
But it is possible to dredge , and they even gave us a map with their 2012 map of where we can easily obtain permits and those areas shouldn’t, by Californias evaluation require an EIR 🤷‍♂️
P.S.
For property permits you go through the regional water board not the state water board 😉
P.S.-P.S. literally hundreds of people helped us arrive at these facts , to those hundreds, please feel free to chime in, I didn’t mention others as I didn’t get their permission to mention them

We all have to have a little fun with our friends.  This is one of my mining buddies; we can call him Dan the Man.  This...
05/11/2026

We all have to have a little fun with our friends. This is one of my mining buddies; we can call him Dan the Man. This A1 rendition looks cool.

I thought this was pretty cool. It looks like the customer is running a 5" sluice box and added a sump system to it.In t...
05/08/2026

I thought this was pretty cool. It looks like the customer is running a 5" sluice box and added a sump system to it.
In this particular area, it sounds like most of the values are in the fines, and he said this setup is making a big difference in his recovery. You’ll notice he has to run a second pump to power the sluice and feed the large top box.
I always love seeing a good success story, especially when someone takes a setup and fine-tunes it for their ground conditions. Mark

05/08/2026

California dredging update
We have had a lot of people asking us if or when suction dredging will ever be allowed again in California. The honest answer is, we have no idea.
What we do know is that nothing changes unless people get involved. If you care about mining rights, outdoor access, small businesses, and common-sense regulations, then voting matters. Do not just vote yourself — get 10 other people to vote with you.
California has been under one-party control for far too long, and the corruption, waste, and mismanagement are disgusting. Billions of dollars keep disappearing into failed programs, bloated agencies, and political pet projects while small businesses, miners, and working families get buried under more rules and restrictions.
My personal opinion is that Republicans may not be the answer to every problem, but the current Democratic leadership has been the cause of California’s problems. It is time to vote out the left-wing politicians who have destroyed common sense in this state.
If we want dredging, mining, private enterprise, and responsible outdoor recreation to have a future in California, people need to stop complaining from the sidelines and start voting. Mark

Wow, we have two of the 8" Super Max dredges built and they should be packed up and shipped out quickly.We’ve built quit...
05/07/2026

Wow, we have two of the 8" Super Max dredges built and they should be packed up and shipped out quickly.
We’ve built quite a few of these machines over the years, and they just keep getting better. Not to beat a dead horse, but I really do love the green carpet. It looks great, adds traction, and gives these dredges a clean finished look.
Each time we build one of these 8" Super Max dredges, the design and finish get a little cleaner. It’s always good to see these big machines come together and get ready to head out into the field.

Larry,We got the super-wide high bankers packed in the crate for Nome, Alaska. The motor and pump are on the smaller pal...
05/06/2026

Larry,
We got the super-wide high bankers packed in the crate for Nome, Alaska. The motor and pump are on the smaller pallet.
My guy, Magic Man, did a great job packing everything up. I had to remind him that it doesn’t have to be pretty — it just has to be functional and survive the trip.
I have one more box left to pack, and once that is finished, I can provide the final weights and dimensions. We have to pack the two grizzly classifiers as well. Should be ready to rock tomorrow.
Mark

We are assembling the two 8" dredges now. Unfortunately, we ran out of the gray carpet we normally use on the decks, but...
05/06/2026

We are assembling the two 8" dredges now. Unfortunately, we ran out of the gray carpet we normally use on the decks, but due to time constraints, we had to move forward and use our more expensive green ribbed carpet.
The upside is it actually looks great and should provide excellent traction on the deck. The only downside is that it may show a little more dirt over time, but the grip should be outstanding.
Sometimes you improvise, and sometimes the upgrade turns out better than planned.

Since we’re already building the A51 and A52 sluice boxes, I might as well show the rest of the equipment in production....
05/04/2026

Since we’re already building the A51 and A52 sluice boxes, I might as well show the rest of the equipment in production. In the background, one of the guys is cutting carpets and matting for the boxes.

Updates on the A51’s and A52’s. This shows the riffles and screens getting ready for plating. Plating isn’t cheap these ...
05/01/2026

Updates on the A51’s and A52’s. This shows the riffles and screens getting ready for plating. Plating isn’t cheap these days, but it’s a critical step we don’t cut corners on.
Construction-wise, our sluices are built differently—with high-quality latches, robust materials throughout, and even the side rails on the riffle boards made from advanced materials that resist bending and spring back into shape.
When you buy a Keene sluice, you’re getting a tool built to last decades—not days like many of the low-cost Chinese imports.

For customers asking about shaft-style connectors for higher-horsepower motors, this is one of the setups we have used f...
04/30/2026

For customers asking about shaft-style connectors for higher-horsepower motors, this is one of the setups we have used for years — from 400 HP Nessie dredges down to older 20 HP diesel engines.
In the shaft-coupling world, names like Lovejoy are common, and they do work well. However, this style is called a Gridline/Grid-Flex-type connector and performs extremely well in heavy-duty applications.
As you can see in the picture, the coupling has machined slots in the ends, and the spring-steel grid holds everything together. This design helps absorb shock, reduce vibration, and allows for a small amount of shaft misalignment.
We also use dual-compression hubs, which help keep the keys locked in place and greatly reduce the risk of slippage.
It is not the cheapest setup, but for high-horsepower dredges and serious industrial applications, it is a very strong and reliable way to connect power to the pump. Once again, we are on a constant learning curve, and I learn a lot from my friends up in Nome, like Larry and Loyd.

Address

20201 Bahama Street
Chatsworth, CA
91311

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

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