Okla. Stat. tit. 66, § 66-51: Power to enter upon lands

Every railroad corporation incorporated under this article, and

any railroad corporation authorized to construct, operate or

maintain a railroad within this state, has power and is authorized

to enter upon any land for the purpose of examining and surveying

its railroad, and to take, hold and appropriate so much real estate

as may be necessary for the location, construction and convenient

use of its road, including all necessary grounds for buildings,

stations, workshops, depots, machine shops, switches, sidetracks,

turntables, snow defences and water stations; all material for the

construction of such road and its appurtenances, and the right-of-

way over adjacent land sufficient to enable such corporation to

construct and repair its road and the right to conduct water to its

water stations, and to construct and maintain proper drains, and may

obtain the right to such real estate by purchase or condemnation in

the manner provided by the law.