Okla. Stat. tit. 19, § 19-1231: Compensation of abutting record title holders - Failure

to compensate.

No change of any grade previously established by such county

shall be made without making due compensation to the record title

holders of abutting property for any damage caused by such grade

change to the permanent improvements erected on said property with

reference to the grade previously established. The failure to make

such compensation shall in no way invalidate such assessments on the

property chargeable with such assessments as provided in Section

1240 of this title.