c/dredge-operators

Got a wakeup call about swing clearance on a job in Baton Rouge

For two years I was cutting my dredge swings way too tight, thinking I was saving time by keeping the ladder close to the cut. Then an inspector pointed out I was leaving a 3 foot ridge between passes and my production numbers were actually lower than if I took wider swings. Did anyone else get humbled by something you thought you had dialed in from day one?

Bought a 3 inch dredge pump off Craigslist for $800, ended up being a paperweight

Spent a whole weekend rebuilding it before I figured out the casing was cracked from freezing. Has anyone else had luck buying used pumps or is it just not worth the risk?

That old timer on the Missouri River job who schooled me on pump pressure

Guy must have been 70, looked at my gauge setup and just said "you're burning out your seals running it that high." He was right. Dropped it 15 PSI and the dredge ran smoother all afternoon. Anyone else have an old hand call them out on something basic?

Spent 4 hours fighting a clogged cutterhead on the Mississippi River job

I had this job near Baton Rouge where the cutterhead kept bogging down, and I figured it was just a hard layer of clay. Turns out a steel cable from an old wreck had wrapped itself around the shaft, and it took me and the deckhand 6 hours to cut it free with a torch. Nobody warned me the river was full of that stuff down there. Has anyone else dealt with random debris locking up your pump like that?

Three years of wrong suction settings wasted my fuel

I was running my cutterhead at max RPM for three years on a job in Mobile Bay until a senior operator watched me for five minutes and pointed out I was just recirculating material. Switched to lower suction and my production went up 20% that same day. Anyone else have a moment like that where a small tweak made a huge difference?

Lost a full day to a clogged cutterhead on the Willamette last week

Came in Monday morning, suction dropped to nothing. Spent 6 hours pulling the ladder, clearing roots and a goddamn tire. Shovel broke on the second scoop. Foreman just said "keep at it." Anyone else have weeks where the only thing moving fast is your blood pressure?

Changed my mind about using a cutterhead deflection gauge on the job

I used to think those cutterhead deflection gauges were just a fancy extra nobody really needed. For like 5 years I would just eyeball the cutterhead alignment before a job and call it good. Then last month a senior operator named Dave at the Port of Galveston told me he caught a 0.04 inch gap that way and saved a whole shift of downtime. I borrowed his gauge and checked my rig, sure enough I was off by 0.03 inches on one side. Now I use a Starrett dial indicator before every big job and it takes me maybe 3 extra minutes. It just makes the cutterhead run smoother and I don't burn through teeth as fast. Has anyone else had a similar wake-up call with a tool you thought was overkill?

GPS was a game changer once I actually trusted it

I ran a dredge on the Mississippi for 15 years using paper charts and dead reckoning. When the company put a GPS unit in the cab back in '09 I thought it was just another thing to break. After it saved my bacon during a foggy shift near Baton Rouge where I couldn't see 10 feet past the bow I never went back. Any of you older guys still run without electronics?

I had to choose between a cutterhead and a trailing suction dredge for a canal job in Louisiana

Last month I was bidding on a silted-up canal near Baton Rouge and had to decide between my old cutterhead dredge or renting a trailing suction unit. The canal was only 8 feet deep but had 4 feet of heavy clay silt with some buried tree stumps. I went with the cutterhead because I knew it could handle the stumps better, but the material was thicker than I expected and I burned through two pump impellers in three days. The trailing suction would have been slower on the stumps but might have saved me on wear and tear. Has anyone else faced a similar choice on a tricky job?

That old hand on the Mississippi showed me how to feel the bottom instead of trusting my gauges. Called me a fool. I didn't believe him.

Been running a 12-inch cutterhead dredge near New Orleans for about 4 years now. Always relied on my depth sounder and flow meter. Thought that was the only way. Last month this old guy named Pete came by our barge. He's been dredging since the 70s. He told me to shut off the screen and just listen to the vibration through the ladder. Feel the cutter teeth hitting the clay. I laughed at him. Tried it for an afternoon though. Within an hour I spotted a mud pocket my gauges missed completely. Saved me from a clog that would have cost half a shift. Anyone else ever ditch their electronics for a gut check like this?

Old dredge mechanic in Houma showed me a trick last month that saved my cutterhead

I was swapping out cutter teeth on my 12-inch dredge in the Houma yard and an old mechanic named Ray walked up. He told me to stop torquing the teeth to 500 foot-pounds like the manual says and just go to 350 with some anti-seize. Last week I pulled that same head after 40 hours and the teeth came off clean without any broken bolts. Has anyone else had issues with the factory torque specs locking up their hardware?

Blew a hydraulic hose on the Mississippi last Tuesday, lost half a shift

I was working a cutterhead dredge near Vicksburg, clearing out a silt buildup by the river bend. Around 10 AM, a 1-inch return line just burst right at the fitting, spraying oil everywhere. Had to shut down the pump, radio the shore crew, and wait 45 minutes for a replacement hose to come out on the supply boat. The whole time I'm thinking, I should've replaced that line last month when I noticed the fraying. Has anyone else had a hose fail on them in the middle of a job and what did you do to get back running faster?

Tried a cheap cutting oil for my dredge cutterhead and it cost me big time

I figured I'd save $80 by buying that store brand cutting oil instead of the marine grade stuff we usually run. After about 3 hours the chain on the cutterhead started smoking bad and seized up on me. I had to call a barge in to lift the head out and that alone set me back $400 in downtime and repairs. The mechanic said the oil just couldn't handle the mud load and grit we deal with here in the Savannah River. Has anyone else tried to cut corners on fluids and ended up paying way more?

A guy with 30 years experience told me I was running my cutterhead too slow

I was chewing through sand just fine on a job in Baton Rouge, but this old timer watched me for five minutes and said I was leaving an uneven cut. I bumped up the RPMs by 15 percent and the material came out way more consistent. Has anyone else had a veteran call out something you thought was working OK?

After 12 years of running a cutterhead, I just learned I was shooting at the wrong angle

I was out on a job near the Port of Houston last month, dredging a slip that hadn't been touched in 8 years. The guy running the survey boat came up and asked why my cut pattern was leaving a 2 foot ridge every pass. I honestly thought that was normal, like a seam you just smooth out later. He showed me on his screen how I was swinging too wide and not overlapping enough, and I felt like a total rookie. Anyone else find out they were doing something basic wrong way later than they want to admit?

I finally tried running the auger at half speed on a sand bar in the Ohio River last week

Kept burning out shear pins running it full tilt like I always do, so I dropped to 50% RPM as a last resort. The suction actually improved and I pulled 40 more yards in the same shift than usual. Has anyone else messed around with varying their cutter speed based on material instead of just flooring it?

Can we talk about choosing wire rope over chain for cutter suction lines?

I know most guys in this group swear by chain for the discharge lines because it's tough and easy to patch. But after 8 years running a small 12-inch dredge on the Missouri River near Kansas City, I swapped to wire rope on my last job and honestly, I'm not going back. The wire rope gave me way less sag between floats, meaning I wasn't constantly adjusting tension every time the current shifted. Yeah, it cost me about $400 more upfront for the setup, and splicing it is a pain compared to just hooking chain links. But I cut down my downtime by almost 2 hours a week because I wasn't fighting kinked chain links or replacing worn spots where the sand chewed through. Has anyone else tried wire rope on a small setup and had a different experience?

We used to run the cutterhead at full tilt on every job, but after a pump clog in the Ohio River last spring, I slow it down for silty bottoms.

The old crew said power through everything, but now I think a steady feed saves wear and parts. Anyone have a rule of thumb for cutter speed versus material type?

Back in 2012, a pump failure on the 'Mississippi Queen' near Baton Rouge made me rethink my whole maintenance schedule.

I thought fixing a clogged cutter head would be a quick job on the old dredge.

We were working a stretch of the Mississippi near Baton Rouge when the suction dropped to nothing. Figured it was just a rock jammed in the head, maybe a two hour fix. Got the crane over, pulled it up, and it was clean. The problem was actually about 30 feet back in the 12-inch discharge line. A solid plug of clay and gravel had set up like concrete. Tried rodding it from the deck with no luck. Ended up having to cut a section out with the torch, which meant shutting down the whole operation. From first noticing the drop in flow to getting back online was a full 16-hour shift. Has anyone else had a line blockage that far back from the head? What's your best trick for finding them before they set up hard?

That time the main pump seized up on the Ohio River job

We were pulling gravel near Cincinnati when the pump just stopped dead. No warning, just a loud grind and then nothing. I checked the suction screen first, but it was clear. Turned out a piece of steel rebar from some old construction had gotten past the cutterhead and jammed the impeller. We had to winch the ladder up and spent about four hours pulling the pump apart on the barge. Got it cleared, but we lost half a shift. Anyone ever have a similar issue with hidden debris in a river channel?

I finally figured out a way to spot a clogged suction line before it stalls the whole pump. It saved us a full day on the Lake Erie job.

Remember when we used to hand-sound for depth before every big dig?

Back on the old cutter suction dredge in Mobile Bay, we'd drop a lead line every hundred feet, calling out numbers for an hour. That changed around 2010 when the company got a basic single-beam echo sounder. Now my current rig has a multi-beam unit that maps the whole cut in real time on a screen. Anyone still running the old lead line method on smaller jobs, or is that skill pretty much gone?

Our old suction dredge was moving about 200 cubic yards a day on the river job last year.

We swapped out the worn 12-inch cutter head for a new one with a different tooth pattern. After that, our daily output jumped to around 280 cubic yards. The change was clear within the first week of running it. The new head just seemed to break up the clay and gravel mix a lot faster. Has anyone else seen a big jump from just changing the cutter, or did we just get lucky with the ground conditions?

Old timer told me to run my cutterhead at 50 rpm in that sticky Georgia clay. I thought he was nuts.

We were on a channel job near Savannah, dealing with that thick, gumbo mud. My usual move was high speed, power through. This guy, worked the river for 40 years, said to drop it way down. He said, 'You'll just make a mess and burn up your pump at 120. Try 50, let it chew.' I was sure we'd stall. Did it his way for a test cut. Took longer per foot, but the spoil was cleaner, the pump pressure stayed steady, and we didn't clog the ladder once all afternoon. Saved us a ton of downtime. Now I'm split. His method worked perfect for that muck, but on sand or loose bottom, slow seems like wasted time. When does the old school 'slow and steady' beat just hammering down? What's your rule for cutterhead speed in different bottoms?