Okla. Stat. tit. 66 § 58
Freeholders so appointed shall be the commissioners to assess all the damages to the owners of real property in said county or subdivision; and said corporation may, at any time after their appointment, upon the refusal of any owner or guardian of any owner of lands in said county or subdivision to grant the right-of-way as aforesaid, by giving said owner or guardian ten (10) days' notice thereof in the manner required on the original appointment of commissioners, have the damages assessed in the manner hereinbefore prescribed. In case of the death, absence, or refusal or neglect of any of said freeholders to act as commissioners as aforesaid, the sheriff shall, upon the selection of the district judge, summon other freeholders to complete the panel, and said commissioners shall receive Three Dollars ($3.00) per day each for their services, and the same shall be taxed in the bill of costs.
Okla. Stat. tit. 66, § 58