Stacy,
I have very knotty white oak boards measuring 1.5” x 18” x 7’3”. Three years ago they were kiln dried to 7% moisture content and heat treated to 135 deg F to kill insect eggs. Knots are large and cracked; the boards are generally flat but there is bulging at some knots. Makes nice character wood or desired. Will re-sterilize if desired. $20/ board