How fast is to fast for Jig and Bobber water?

In the summer when the water gets low I focus on deeper slots that sometimes are almost whitewater on top. Not really sure what is going on underneath but if the boulders are big enough the fish will hold. The fast water produces the oxygen they need.

I can catch fish with a simple corky, yarn and shrimp oil in these slots. Have tried a jig and bobber in the faster water but not for very long because I do not have the confidence that the jig is working properly in faster water.

Any of you jig experts out there catch fish in deep white water or almost white water using a jig and bobber?