Okla. Stat. tit. 19 § 1230
Any board of county commissioners in the State of Oklahoma is hereby empowered, within the unincorporated limits of the county, to establish and change the grade of any road, street, avenue, lane, alley, or other public place, and to permanently improve the same by grading, paving, constructing, macadamizing, chatting or graveling, curbing, guttering, draining and otherwise improving the same, including the installation of the necessary manholes, catch basins, inlets and drainage pipes and storm sewers with necessary connections thereto for the purpose of providing for the adequate disposition of surface water falling on such improvements or carried thereon, and to make all necessary connections, whenever the public necessity may require such improvements.
Okla. Stat. tit. 19, § 1230