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c/dredge-operators

22

tessalane•1d ago

Just crossed 10,000 hours on the same dredge pump and it still hums

I was looking at my logbook the other night and realized I hit 10,000 operating hours on my main dredge pump last week. That thing has been through mud, gravel, and some real nasty debris from that job we did up near the Green River back in 2019. It's an old Mark 3 model, nothing fancy, just a workhorse. I never thought I'd see that number on a single pump without a major rebuild... but here we are with only a seal replacement at 7,200 hours. Honestly, it made me think about how pumps used to be built versus the stuff coming out of factories today. Any of you guys tracking hours on your gear like this, or am I just a nerd with a notebook?

19

the_john•1d ago

My cutter head grabbed a submerged log near Baton Rouge last spring and nearly flipped the barge.

I was running a 12-inch dredge on the Mississippi when the head snagged something big and the whole rig started listing hard. Had to kill the pump, reverse the swing cables, and work it loose by hand with a pike pole for 20 minutes before we could get back to it. Anyone else ever hit something underwater that just about ended your shift?

12

kevin_williams•2d ago

Switched from hand jets to a hydraulic one on my dredge last season

I used to run a 4 inch hand jet for years on my little dredge up in the Sierras. After I got tired of fighting it in heavy gravel I finally swapped to a hydraulic jet setup from a guy in Oregon. Cost me about $800 but my recovery rate went up by maybe 30% because I could run more material. Has anyone else made that switch and seen a big difference in how much you move?

6

sullivan.quinn•2d ago

Last Tuesday was my worst day on the water in 5 years

I hit a submerged log right at dawn near the old mill bridge and it jammed up the cutterhead for 3 hours. Had to anchor up and dive down with a pry bar in 45 degree water to clear it out. Has anyone else dealt with mystery debris in channels that aren't marked?

20

the_hayden•4d ago

Old timer on the Atchafalaya taught me something about cutterheads I still think about

Was working a job near Morgan City about 8 years ago and this guy named Pete, must have been pushing 70, walked up and showed me how to read the wear pattern on a cutterhead like it was a map. Said "son, that metal's telling you where the sand is hiding" and walked off. Ever had a random encounter like that stick with you longer than any training class did?

7

kai_ramirez38•8d ago

Old school vs new school on swing arm maintenance. Which side are you on?

I used to grease my swing arm bearings every three months like clockwork. That was the way my old foreman taught me back in 2011 on a job in Baton Rouge. But about two years ago I switched to a sealed bearing setup on my rig and now I barely touch them. The old method took me about two hours each time with a hand grease gun and a lot of cleanup. The new sealed ones cost me around $400 to swap in but they've held up for over 500 hours without a problem. Some guys I talk to say sealed bearings are a waste because you can't inspect them. Others swear by them for cutting downtime. Has anyone else here made the switch and seen a real difference in your maintenance schedule?

18

black.oliver•8d ago

Switched to a different cutterhead after a job in Galveston went south

Was running a standard basket cutter on a sandbar in Galveston Bay and kept burning through bearings every 3 hours. Swapped to a straight edge with tungsten tips from a guy on the dock and finished the whole 40-foot channel without a single hiccup. Anyone else found a weird cutterhead setup that just worked where nothing else would?

4

the_rose•9d ago

Found out how much sediment we actually move per hour and it changed my whole approach

I was digging through the manual for our Ellicott 370 last week, just trying to figure out a weird pressure reading. Stumbled on a chart that showed our average production rate in cubic yards per hour for different material types. Turns out when we're hitting sticky clay, we're only moving about 60% of what I thought we were. All this time I've been telling the foreman we're good for 200 yards an hour when really we're pushing maybe 120 in those conditions. Made me realize I need to adjust my estimates for job bids way more depending on the soil report. Has anyone else cross-checked their actual output against the spec sheets on their rig?

30

kai839•9d ago

Had my cutterhead seize up on me in the middle of a job in Galveston last Tuesday

Pulled up a chunk of old steel cable that wrapped around the shaft and fried the bearings in under 30 seconds, had to call for a barge tow and lost a full day of production, anybody dealt with hidden debris like that before?

14

tessalane•10d ago

That choice between steel and poly dredge hose last month

Had to pick between steel reinforced hose and polyurethane for a job on the Mississippi near Baton Rouge. Went with poly cause it was $800 cheaper for a 50 foot section. Three days in a rock snag tore a gash in it and I lost half a shift patching it. Steel woulda held up but I was trying to save my boss some cash. Next time I'm just getting the steel even if it costs more. Any of you guys had poly hose fail on you like that?

11

abbyf79•10d ago

Saw something wild at the Port of Savannah last week

Walked past a crew running a 14-inch cutterhead dredge in the Savannah River channel and noticed they had zero overflow on their pipeline. Made me wonder how many of us are losing material through bad seals without even knowing it. Anyone else ever tested their line pressure losses on a job?

0

wade_anderson•10d ago

That time a sandbar tried to eat my cutterhead near New Orleans

I was running a 12-inch cutter suction in the Mississippi River last spring and hit a buried sandbar that nobody flagged on the survey. It stalled the cutterhead dead and about wrapped 40 feet of cable around it before I could kill the pump. How do you guys spot hidden bars when the water's too muddy for a visual check?

30

anna717•12d ago

The change in our draghead setup over one season in Mobile Bay

We used to run the standard 5 tooth draghead on our dredge in Mobile Bay for sand work. Last spring, the foreman switched us to a 7 tooth pattern with a wider spacing. Within 3 weeks, our production numbers jumped from about 800 cubic yards per hour to 1100. The old setup was just clogging up too much on the shell mix we hit after storms. Has anyone else seen a big jump from tweaking tooth count like that?

18

victorhernandez•12d ago

Heard a old timer at the diner say he runs his cutterhead at 40% less RPM than spec

I always thought you had to follow the manual exactly, but he said he gets way less wear on his bearings and still pulls the same yardage. Makes me wonder if I'm overworking my machine for no reason. Anyone else play around with running slower?

12

pat_harris•14d ago

Pro tip: had a chat with a dock master in Galveston that made me rethink how I set my anchor lines

He told me most guys run too much slack and that cuts your swing radius way down... I tried his 3-to-1 ratio instead of my usual 5-to-1 and the dredge sat way steadier in a 2-knot current. Anyone else had a dock rat give advice that actually stuck?

22

noahwood•15d ago

Changed my mind about running cutterhead speed at max all the time

I used to run my dredge cutterhead at full throttle thinking it cleared material faster, but last week on the Missouri River I noticed my slurry density kept dropping and I was burning through teeth. A older operator on site showed me how backing it down 15% let the pump work better and actually moved more dirt per hour. Has anyone else seen better production by slowing the cutter down?

23

fionanguyen•17d ago

Serious question, that 'grease the cutterhead every 2 hours' tip from old Bob? Saved my gear

Ngl, I thought Bob was just being dramatic when he told me to grease the cutterhead every 2 hours on the dot. Last week I skipped a round dealing with a clog near Charleston Harbor. After 4 hours, the bearings started sounding rough and I had to pull the rig to check. Honest truth, the wear marks were worse than anything in my 3 years doing this. Has anyone else had an old hand's advice save them from a costly repair like this?

7

blair_torres70•18d ago

Warning: Got pinned against the bank at mile marker 12 on the Yazoo River last week

I was running a swing ladder on the Yazoo River near Vicksburg last Thursday when a sudden current shift pushed me hard into the bank. The port side fender got crushed and I nearly lost the ladder assembly to the mud. My takeaway is that I ignored the flow gauge reading 8.7 feet after a heavy rain the night before. That little change made all the difference in how the river handled. Has anyone else nearly gotten squeezed by a fast-rising channel like that?

24

milesbarnes•21d ago

Used to burn through cutter teeth every two weeks until an old hand showed me a different angle

I was setting my cutter teeth at 45 degrees like the manual said and going through a set every 14 days in this sandy clay near the Mississippi. A retired guy named Ray watched me for 5 minutes and told me to drop it to 30 degrees for that material. Has anyone else found that the factory specs are just a starting point and not gospel?

26

the_elizabeth•21d ago

That Wednesday when the pump clogged three times before lunch

Had a day last August on the Missouri River where I cleared the intake screen at 6 AM, then again at 7:30, then at 9:15. Third time I found a whole denim jacket wrapped around the impeller. Took me 45 minutes with a knife to cut it off. Anyone else hit a stretch of river where the debris just gets weirder every year?

5

mason_murray8•21d ago

The time I laughed at a guy for running his dredge at half throttle... until I saw his production numbers

Met an old timer down in Louisiana last year who said he runs his cutterhead at 50% power almost all the time. I thought he was nuts and told him as much. He pulled up his logs showing 30% less fuel burned and only 10% less material moved over a month. Now I actually back my throttle off when the material gets loose and I'm honestly getting better results.

1

white.keith•24d ago

Tried that 'run the pump dry for 30 seconds' trick my old foreman swore by

Last Tuesday on a job near the Port of Tampa, I let the suction run empty for exactly 28 seconds before shutting down. Ended up with a seal failure that cost me $600 and a full afternoon of repairs. Guess that hack only works if your pump isn't a 20-year old Ellicott that's held together with hope. Any of you guys actually had success with that method or is it just a way to sell more parts?

9

the_daniel•25d ago

Rant: Tried a hydraulic dredge pump for a month and lost a full day of production each week

Swapped back to my old electric submersible after fighting priming issues, fouled impellers, and a blown seal on the hydraulic unit that cost me $600 in parts and 8 hours downtime, has anyone else found the electric just more reliable in tight quarters?

6

skyler_kelly69•28d ago

I finally got a nod from that old timer on the Mississippi

Been running a cutterhead suction dredge near Baton Rouge for 5 years, and one old operator named Pete never said a word to me until last week. He just walked over after I cleared a tricky sandbar and said 'you got the feel for it.' Made my whole week, man. Anyone else have a quiet mentor moment like that?

23

the_laura•29d ago

Just read a report about cutterhead bearing failure on an Ellicott 370

I was looking through some old maintenance logs from a job on the Mississippi River last summer, and nearly half the downtime was from bearings that failed 200 hours early because guys weren't flushing the grease ports after each shift. Has anyone else seen this kind of pattern on your machine, or is it just that one crew cutting corners?