Depends entirely on your trolling motor thrust and whether it is a 24V or 12V system. I have an 18.5' Stratos with 70lb 24V trolling motor and I consider 12,000/13,000 CFS to be the optimal flow rate to fish below the dam. Optimally, you're on the water when the flow rate increases from one generator to two, or from sluice flow to one generator. The triggering moment for fish is the step up in flow rate. Based on my experience, anything over 20,000 CFS is difficult to manage and your batteries will run down in just a few hours.
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