Let it ride?

Nothing wrong with that weight.

 

You'll be legal after 120 miles, you should be around 11,920 or very close to that when you hit the scale. Good luck

 

Do have a fuel stop between Columbia and Indiana? If not I would roll with it then,

 

Me, I'd run with it. Doubtful you'll get hassled over 80 lbs. That's well within the margin of error. Besides, if the next scale is the indiana scale it's almost certainly closed.

 

Roll with it and slide the 5th wheel back a little if you want. I never had a problem(as in-being hassled by the scales) with steer weight and 12,500 was what I always shot for.

 

Only in Arkansas. Everywhere else 12,500

 

Look in the Rand atlas, it gives states steer weights. Then check tire ratings. Then check axle ratings on the door jam. The max steer weights are smaller of the three.
Most likely is you are on a fleet truck, the axle is 12k, but if it's more you likely have 12.5k to 13k as your max.