Okla. Stat. tit. 27 § 7.10
In the event a common carrier, in the exercise of the power of eminent domain, or any other power granted hereunder, makes necessary the relocation, raising, lowering, rerouting, or changing the grade of, or altering the construction of any electric transmission or telephone lines, railroads, or properties and facilities, or pipeline, all such relocation, raising, lowering, rerouting, changing of grade or alteration of construction shall be accomplished at the sole expense of such common carrier . The term "sole expense" shall mean the actual cost of such relocation, raising, lowering, rerouting, or change in grade or alteration of construction in providing comparable replacement without enhancement of such facilities, after deducting therefrom the net salvage value derived from the old facility.
Okla. Stat. tit. 27, § 7.10