Just from my own experience,it has taken me much trial and alot of errror when searching creeks.I have managed to find a few creeks that i can count on finding artifacts in usually everytime out.now with that said creeks are hit or miss and you just never know,but from my experience if you arent finding much material or none, then move on to the next creek or to a different section of that creek,you may not find any headz everytime out but you should be finding material and some brokes if the ancients were there.i would hunt a creek nearest to where you have found artifacts in a field,thats where i would start.As far as the creek near the mound,its kind of funny but i have repeatedly hunted a creek that is within 300 ft of two adena mounds and have never found as much as a scraper or a tip.plenty of material but never any artifacts,and i have spent alot of time in this particular creek.keep trying different spots and you will eventually hit pay dirt.good luck hunting and if you need a creek hunting fix and you are in the columbus area sometime,give me a shout and maybe we can take out the stealth canoe and go rescue us some headz.