Question: Do log jams in rivers normally hold more than one big blue catfish?

[doebranch]

I've started fishing the Wateree River about 15 to 20 miles below the power house. I've caught some really nice big blues but it seems like it's one big blue to a log jam? Then it seems that after I catch the big blue it might be a week or so before I catch another big blue out of that log jam. What' your experience with this since I don't know if I'm being too impatient and not waiting long enough for the next bite. Also it appears if there is a big fish in the jam, he'll bite within 15 minutes almost every time. Any advice would be appreciated.

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[brinley45cal]

i find blues are a little more solitary then channels so unless its a big structure id say most of the time it would be just one big one in there,after that id move to a different location.