This morning, based on my assumption,
I changed the strategy for that river.
HIGANBANA( a cluster-amaryllis) was seen first time this year.
Fishing toward downstream method didn't give me any superb effect.
But got some new findings and some bites.
Some mayflies were popped out this morning, might be one of HIRATA species.
I got skunked completely 6-8AM fishing, and now I reached the conclusion.
Let's check your new assumption, Lance. Hopefully, soon.