For some reason, I can’t remember why, I was down at YSUs stadium a couple times during installation and when they put down the very first turf. Nasty stuff. Like indoor/outdoor carpeting. And yes, it was asphalt with if i remember correctly, about a 3/4 inch rubber cushion. No rubber pellets in those days. Rock hard. While I was standing near the end zone they cut a piece of turf out where the goal post went in. I grabbed it and kept it. It’s still somewhere in my basement I think. The only thing about that stuff similar to grass was the color.Thank you for that.
I just assumed with the drains around the perimeter of the field it was similar to YSU's drainage system. YSU does have asphalt under their turf which I did not know until it was replaced for the very first time.