
256 U.S. 531 (1921)
CHOCTAW, OKLAHOMA & GULF RAILROAD COMPANY ET AL.
v.
MACKEY, AS COUNTY TREASURER OF HUGHES COUNTY, OKLAHOMA, ET AL.
No. 211.
Supreme Court of United States.
Argued April 21, 1921.
Decided June 1, 1921.
APPEAL FROM THE CIRCUIT COURT OF APPEALS FOR THE EIGHTH CIRCUIT.
*532 Mr. C.O. Blake, with whom Mr. W.R. Bleakmore, Mr. R.A. Tolbert, Mr. Roy St. Lewis, Mr. Thomas P. Littlepage and Mr. Sidney F. Taliaferro were on the brief, for appellants.
Mr. Jacob B. Furry, with whom Mr. Geo. S. Ramsey, Mr. W.H. Harris, Mr. J.W. Harbaugh, Mr. W.T. Anglin and Mr. Alfred Stevenson were on the brief, for appellees.
*534 MR. JUSTICE BRANDEIS delivered the opinion of the court.
This suit was brought in the United States District Court for the Eastern District of Oklahoma by the Chicago, Rock Island & Pacific Railway Company to have declared void a special assessment for street improvement made against part of its right of way and station grounds in the City of Holdenville, Oklahoma, and to enjoin the taking of any proceedings to enforce the same. The Choctaw, Oklahoma & Gulf Railroad Company, the lessor, was joined as plaintiff. The defendants are the county treasurer, the city, and holders of bonds issued to pay for the improvement. The street improved, called Oklahoma Avenue, runs parallel to the main tracks. The station grounds abut on the Avenue for a distance of 1641 feet, and the parcel assessed extends back from the Avenue 150 feet to the center of the right of way. Over this street a large part of the traffic to and from the station necessarily passes. For between it and the main *535 tracks lie the passenger depot, the freight houses, the express office, the cotton platform, an oil warehouse, grain elevators, coal bins and the team tracks. The assessment is assailed as invalid on several grounds. The chief contention is that the property is immune from assessment by the State because that part of the railroad was an instrumentality of the Federal Government. The other grounds of attack are that in laying the assessment the property was not sufficiently identified, and that the assessment of a railroad right of way and station grounds is not authorized by the law of the State. The District Court entered a decree for plaintiffs which was reversed by the Circuit Court of Appeals with directions to dismiss the bill. 261 Fed. Rep. 342. The case comes here under § 241 of the Judicial Code.
First. The claim of immunity from assessment rests upon these facts: The right of way and station grounds are on land which had belonged to the Creek Nation before the town (now city) was established under direction of the Secretary of the Interior, pursuant to the original Creek Agreement. Act of March 1, 1901, c. 676, § 10, 31 Stat. 861, 864. The Rock Island acquired its interest on March 24, 1904, under a lease from the Choctaw, Oklahoma & Gulf, for a period of 999 years, of all of its railroad property. The lessor company had in locating its railroad through Holdenville taken, besides the right of way 100 feet wide, an additional strip for station purposes 200 feet wide with a length of 3,000 feet; having acquired the power so to do by succeeding to the powers and franchises of the Choctaw Coal and Railway Company. To that company Congress had in 1888 granted the right to build a railroad in Indian Territory, with a branch line to coal mines leased from the Choctaw Nation.[1]
*536 The contention is that the railroad is an instrumentality through which the Government undertook to perform its obligation to develop coal lands belonging to the Indians; and that, if the railroads' interest in the right of way and station grounds could be subjected to a special assessment and possible sale thereunder apart from the railroad franchises, the congressional purpose might be obstructed. Choctaw, Oklahoma & Gulf R.R. Co. v. Harrison, 235 U.S. 292; see also Northern Pacific Ry. Co. v. Townsend, 190 U.S. 267; Indian Territory Illuminating Oil Co. v. Oklahoma, 240 U.S. 522.
The mere fact that property is used, among others, by the United States as an instrument for effecting its purpose does not relieve it from state taxation. The most that can be said here is that among the public served by this railroad are some mines on land leased from the Choctaw Nation. The right of way and station grounds in question, instead of being as was perhaps originally contemplated by the Act of February 18, 1888, part of a branch to leased "coal veins," have become an integral *537 part of through lines of a great railroad system.[1a] Holdenville is on the main line of the Choctaw, Oklahoma and Gulf which extends from the west bank of the Mississippi River through Arkansas and Oklahoma to the Texas state line, a distance of nearly 650 miles. By the lease to the Rock Island, this railroad has become a part of the through lines of a much larger system. And even though it be granted that the Federal Government utilized the railroad as an instrument in working out its policy toward the Indians the tax upon the railroad property would be none the less valid. Railroad Co. v. Peniston, 18 Wall. 5, 36; Western Union Telegraph Co. v. Massachusetts, 125 U.S. 530, 546-548; Central Pacific R.R. Co. v. California, 162 U.S. 91, 125; Thomas v. Gay, 169 U.S. 264.
Second. Equally unfounded is the contention that the assessment did not sufficiently identify the property, and was hence a denial of due process of law. The Oklahoma statute under which the assessment was made (Comp. Laws, 1909, § 724), provides that:
"If any portion of the property abutting upon such improvement shall not be platted into lots and blocks, the mayor and council shall include such property in proper quarter block districts for the purpose of appraisement and assessment, as herein provided."
The railroad premises not having been platted, the Mayor and Council adopted a map of the city engineer, on which the right of way and station grounds were set forth in proper quarter block districts. The premises *538 assessed were those quarter blocks thereon designated as abutting on that portion of Oklahoma Avenue which was improved; and the designation was clear. Some time after the passage of the ordinance providing for the assessment this map was inadvertently removed from the city files, sent to the purchasers of the bonds issued for the improvement, and not returned until after the lapse of a considerable time. But the railroad companies had full knowledge of the proceedings relating to the assessment and of the commencement, the progress and the completion of the improvement. There is not even a suggestion that they were injured or misled by the temporary absence of the map from the city files. Such removal did not invalidate the assessment. Furthermore, mere insufficiency of description or other irregularity in the proceeding would not entitle abutting landowners to the relief sought here. Their right would be limited to having the Mayor and Council make a reassessment conforming to the regulations prescribed by the statute. See Oklahoma Laws, 1907-8, p. 176, §§ 7-8; Oklahoma Ry. Co. v. Severns Paving Co., 251 U.S. 104.
Third. The remaining contention is that the statutes of the State do not authorize assessment for betterments upon a railroad right of way and station grounds. The mere fact that there is a possible right of reverter in the Creek Nation does not preclude the railroad's interest from being subject to general taxation; see Baltimore Shipbuilding Co. v. Baltimore, 195 U.S. 375; Maricopa & Phoenix R.R. Co. v. Arizona, 156 U.S. 347, 352. The railroad's interest, as stated in Rio Grande Western Ry. Co. v. Stringham, 239 U.S. 44, 47, is "neither a mere easement, nor a fee simple absolute, but a limited fee, made on an implied condition of reverter in the event that the company ceases to use or retain the land for the purposes for which it is granted, and carries with it the incidents and remedies usually attending the fee." In *539 effect the railroad is the absolute owner of the land. Its use is, and necessarily must be, exclusive. The betterment for which the assessment was levied is of a nature to enhance the value of that use. And it is the railroad, as distinguished from the Creek Nation, owner of a possible reversionary interest, to which the benefit from the improvement enures. For the railroad's use will continue indefinitely, while the specific improvement to be paid for can have but a short life.
Street paving is a class of betterment to which the railroad right of way and station property is generally held to be subject. See Louisville & Nashville R.R. Co. v. Barber Asphalt Co., 197 U.S. 430; Branson v. Bush, 251 U.S. 182. The rule appears to have been accepted in Oklahoma. Compare Missouri, Kansas & Texas Ry. Co. v. Tulsa, 45 Oklahoma, 382; Oklahoma Ry. Co. v. Severns Paving Co., 251 U.S. 104. It is urged that, if the assessment is left unpaid, a sale to enforce the lien would sever an integral part of the railway. The same objection might be urged against the validity of a lien for general taxes locally assessed upon railroad property or a mechanic's lien upon the same. The objection is clearly unsound. Compare Kansas City Southern Ry. Co. v. Tansey, 41 Oklahoma, 543; Kansas City Southern Ry. Co. v. Rosier, 38 Oklahoma, 231; Kansas City Southern Ry. Co. v. Wallace, 38 Oklahoma, 233. If the validity of the assessment is established, it may be assumed that due payment will follow. At all events we have no occasion to deal now with the method and means to be pursued in enforcing it.
Affirmed.
NOTES
[1]  Act of Congress, February 18, 1888, c. 13, 25 Stat. 35. Section 2, provides:

"That said corporation is authorized to take and use for all purposes of railway, and for no other purpose, a right of way one hundred feet in width through said Indian Territory for said main line and branch of the Choctaw Coal and Railway Company; and to take and use a strip of land two hundred feet in width, with a length of three thousand feet, in addition to right of way, for stations, for every ten miles of road. . . .
"Provided further, That no part of the lands herein authorized to be taken shall be leased or sold by the company, and they shall not be used except in such manner and for such purposes only as shall be necessary for the construction and convenient operation of said railroad, telegraph, and telephone lines; and when any portion thereof shall cease to be so used, such portion shall revert to the nation or tribe of Indians from which the same shall be taken."
See also Acts of February 13, 1889, c. 152, 25 Stat. 668; October 1, 1890, c. 1252, 26 Stat. 640; February 21, 1891, c. 249, 26 Stat. 765; January 22, 1894, c. 14, 28 Stat. 27; August 24, 1894, c. 330, 28 Stat. 502; April 24, 1896, c. 122, 29 Stat. 98; March 28, 1900, c. 111, 31 Stat. 52.
[1a]  When Congress authorized the purchasers of the property and franchises of the insolvent Choctaw Coal and Railway Company to reorganize as the Choctaw, Oklahoma and Gulf, it conferred upon the latter "perpetual succession." Act of August 24, 1894, c. 330, § 5, 28 Stat. 502, 503. Later it greatly enlarged its powers, conferring authority without limit, to construct its railroad over any Indian reservation and to acquire and consolidate with practically any connecting line. Acts of April 24, 1896, c. 122, 29 Stat. 98; March 28, 1900, c. 111, 31 Stat. 52.
