Finally got my suction line to stop clogging on that silt-heavy stretch of the Missouri

Been working a channel maintenance job near Sioux City for the past three weeks, and the silt was just murder on my 10-inch cutterhead dredge. Every other hour, I was shutting down to clear a partial blockage in the suction line, losing a ton of production time. I was about ready to pull my hair out. On a hunch, I started running the ladder a full foot higher than my usual depth setting for that material, and I bumped the swing speed way down, like to maybe 70% of normal. It felt wrong, like I wasn't being aggressive enough. But you know what? Letting the cutter just kiss the top layer and swing slow gave the pump a steady, manageable slurry instead of a dense slug of pure muck. Went a full 8-hour shift yesterday without a single clog. Has anyone else had to tweak their approach that much for super-fine sediment?

2 comments

2 Comments

webb.xena8d ago

My buddy had the same issue and fixed it by adding a big water jet upstream of the pump intake.

lucaslane8d ago

That water jet trick can help, but it's more for preventing material from settling in the line during a shutdown. Your real fix was changing the cut. Running high and slow is the right call for that soup, because you're controlling the density at the source. A jet just tries to fix a problem you're already making.