I fished Lynn Camp Prong the day they used the Antimycin on Sams Creek and the warning signs at the trailhead said that Antymicin was an antibiotic and it would react adversely with contact lenses,among other things and the trail up Thunderhead Prong was closed.
I have read that Ant. is less destructive to insects than the Rotenone.
Silvercreek that is cool about the reaction with glycerin,the pot.perm. is a strong oxidizer and on well water with strong iron content can be treated with an injector to add the chemical.
2WF I have seen weirs that went all the way across Little River below Metcalf when the flows were low in the summer.I can see how it would impede the travel of minnows.