Okla. Stat. tit. 66, § 84
It shall be the duty of every railroad company operating a line of road wholly or in part within this state for the transportation of freight, upon the verbal or written application of any shipper to its station agent or other agent in charge of transportation of freight for a car or cars to be loaded with freight other than perishable freight or live stock, stating the character of the freight and its final destination, to furnish said car or cars within four (4) days from seven o'clock a.m. of the day following such application; or, when such application specifies a future day when said car or cars are required, giving not less than four (4) days' notice thereof, computing from seven o'clock a. m. of the day following such application, it shall be the duty of said company to furnish said car or cars on the day specified in said application. For failure to comply with this section said company shall forfeit and pay to the shipper applying for said car or cars the sum of One Dollar ($1.00) per car per day or fraction of a day's delay after free time, together with all actual damages said applicant may sustain thereby: Provided, that if in case of fire, washouts, strikes, lockouts, or other unavoidable casualties such railroad company shall not be able to furnish such cars within such time, then and in that event such time of demurrage shall not begin to run until such obstacles and hindrances are removed.
R.L. 1910, § 1414.