I might know exactally which one your talking about......What brown stains means it has that good worn in feel to it - whats wrong with that?
I travel that area daily. And live/work near or off I-65.
Yeah, its one of those sh-holes off I-65 on the west side of the highway. You can see if from the road. I would say only 10-20 miles from the border, maybe less, can't remember. N-A-S-T-Y!