Okla. Stat. tit. 66, § 66-62: Changing line or grade

Whenever any railroad corporation shall find it necessary, for

the purpose of avoiding annoyance to public travel, or dangerous or

difficult curves or grades, or unsafe or unsubstantial grounds or

foundations, or for other reasonable causes, to change the grade or

location of any portion of its road, such railroad corporation shall

be and is hereby authorized to make such changes of grade and

location, not departing from its general route. And for the purpose

of making any such change in the location and grades of any such

roads as aforesaid, such corporation shall have all the rights,

powers and privileges to enter upon and appropriate such real

property, and make surveys necessary to effect such changes and

grades, upon the same terms, and subject to the same obligations,

rules and regulations as are prescribed by law; and shall also be

liable in damages, when any may have been caused by such change to

the owner of real property upon which such road was heretofore

constructed, to be ascertained and paid, or deposited as herein

provided; but no damages shall be allowed unless claimed within

ninety (90) days after actual notice in writing of such intended

change shall be given to such owner residing on the premises, or, if

nonresident, notice by such publication in some newspaper in general

circulation, as the district judge may order.