*436 Mr. Justice Hughes

delivered the opinion of the court.

This is a writ of error to review a judgment pf the Supreme Court of the State of Minnesota which affirmed a judgment entered in a controversy submitted upon an agreed statement of facts. The statement, in substance, shows:

Within the limits of the City of Minneapolis are Lake Calhoun, Lake of the Isles and Cedar Lake, lying in close proximity to each other and used by the public for pleasure boating and other recreations. The City, having acquired for park and parkway purposes the shores of Lake Calhoun and Lake of the Isles, and a portion of the shores of Cedar Lake, together with large tracts, of ;land in the vicinity, is engaged in constructing two canals which will connect the lakes and will greatly enhance their usefulness to the public. Between Lake Calhoun and Lake of the Isles is a strip of land, six hundred feet wide in its narrowest part, through which one of these canals is to be opened. Along this strip and near its center lies the right-of-way — one hundred feet in width — of the appellant, the Chicago, Milwaukee & St. Paul Railway Company, which is used by it in the operation of its road. The City, in order to provide for the canal and walks on either side, seeks to condemn an easement in a piece of land one hundred feet wide across the right-of-way. The two lakes are now connected by a ■ small water-course which crosses the right-of-way about fifty-nine feet from the center of the proposed canal and is carried under the railway tracks by a pipe about three feet in diameter. The construction of the canal will render the water-course and pipe useless and permit the closing of this channel. At the point where the land is to be taken by the City, the railway tracks are upon an artificial embankment about eighteen feet above the established level of the *437 water in the lakes. The City’s improvement will require the construction of a bridge to carry the tracks across the canal and walks. The agreed value of the mere land proposed to be taken, irrespective of the cost of the bridge, is the sum of ten dollars; and the estimated cost of building a bridge in accordance with plans prepared by the City and accepted by the Railway Company iss the sum of $18,513. It is agreed that an adequate bridge for railway purposes, built according to the plans usually adopted by the Railway Company, would cost, only $15,969. The difference in cost, or $2,544, is due to ornamental features, and this amount it is agreed that, in any event, the City shall pay. For the purposes of this proceeding, the Railway Company conceded the authority of the City to take the described land under the power of eminent domain; and it was agreed accordingly that the City should take the land and construct the canal and walks, and that the Railway Company should build the bridge after the City’s plans; but no claim.for damages or compensation to which the Railway Company was entitled under the law by reason of the taking was waived.

The controversy submitted was as to the amount which the Company should receive. It was contended by the Company that it should be paid (1) the sum of ten dollars as the agreed value of the land taken, (2) the entire cost of the bridge, and (3) such further sum as would be sufficient to maintain the'bridge. It was also insisted that to divest it of its property without such payment would be a violation both of the state constitution and of § 1 of the Fourteenth Amendment to the Federal Constitution. In the court of first instance it was held that the Company was entitled to recover only the sum of $2,554, being the value of the land and the cost of the ornamental features of the bridge; and this judgment was affirmed by the Supreme Court of the State. 115 Minnesota, 460.

The question thus presented is whether the refusal *438 to allow compensation for the cost of constructing and maintaining the necessary railroad bridge across the gap in the right-of-way, made by the building'of the canal, amounts to a deprivation óf property without due process of law..

It is well settled that railroad corporations may be required, at their own expense, not only to abolish existing grade crossings but also to build and maintain suitable bridges or viaducts to carry highways, newly laid out, over their tracks or to carry their tracks over such highways. N . Y. & N. E. R. R. Co. v. Bristol, 151 U. S. 556, 567; C., B. & Q. R. R. Co. v. Chicago, 166 U. S. 226, 252, 255; C., B. & Q. R. R. Co. v. Nebraska, 170 U. S. 57; Northern Pacific Ry. Co. v. Duluth, 208 U. S. 583, 597; St. P:, Minn. & Man. Ry. Co. v. Minnesota, 214 U. S. 497; C., I. & W. Ry. Co. v. Connersville, 218 U. S. 336, 343, 344. See also Detroit &c. Railway v. Osborn, 189 U. S. 383; New Orleans Gaslight Co. v. Drainage Com’n, 197 U. S. 453, 462; C., B. & Q. Ry. Co. v. Drainage Com’rs, 200 U. S. 561, 592, 593; Atlantic Coast Line v. Goldsboro, decided this day, post, p. 548. ’ The rule, as established in the State o'f Minnesota, was thus declared in the case of State ex rel. Minneapolis v. St. P., Minn. & Man. Ry. Co., 98 Minnesota, 380 (see 115 Minnesota, p. 466): “A railroad company receives its charter and franchise subject to the implied right of the State to establish and open such streets and highways over and across its right of way as public convenience and necessity may from time to time require. That , right on the part of the State attaches by implication of law to the franchise of the railroad company, and imposes upon it an obligation to construct and maintain at its own expense suitable crossings at new streets and highways to the same extent as required by the rules of the common law at streets and highways in existence when the railroad was constructed.” In that case, it appeared that long after the construction of the railroad, the City of Minneapolis had laid *439 out a street aeross the railroad right-of-way, building at its own cost a bridge over the railroad tracks. After the bridge had been maintained for several years by the City it was destroyed by fire, and the City then demanded that the railroad company should build a new one. This demand the state court sustained; and, mandamus having thereupon been awarded (101 Minnesota, 545), the case was brought to this court, one of the grounds being that the action of the State deprived the company of its property without due process of law. The judgment was affirmed (St. P., Minn. & Man. Ry. Co. v. Minnesota, 214 U. S. 497), this conclusion being reached upon the authority of Northern Pacific Ry. Co. v. Duluth, 208 U. S. 583. Although the Duluth Case was earlier in this court, the decision therein by the Supreme Court of the State immediately followed that of the same court in the Minneapolis Case and applied the principle which had been there announced. State ex rel. Duluth v. Northern Pacific Ry. Co., 98 Minnesota, 429. The facts were that after the railroad had been built, a street had been opened across the right-of-way and subsequently a viaduct for the crossing had been constructed at the joint expense of the City and the railroad company, the former agreeing to maintain it. Later, the City, repudiating the agreement, insisted that the company should repair the viaduct at its own expense. The state court entered judgment for the City, holding that the obligation to construct and maintain the viaduct rested upon the railroad company and that hence the contract was invalid. This court affirmed the judgment saying: “As the Supreme Court of Minnesota points out in the opinion in 98 Minnesota, 380, . . . the state courts are not altpgether agreed as to the right to compel railroads, without compensation, to construct and maintain suitable crossings at streets extended over its right of way, after the construction of the railroad. The great weight of state au *440 thority is in favor of such right. (See cases cited in 98 Minnesota, 380.)' There can be no question as to the attitude of this court upon this question, as it has been uniformly held that the right to exercise the police power is a continuing one; that it cannot be contracted away, and that a requirement that a company or individual comply with reasonable police regulations without compensation is the legitimate exercise of the power and not in violation of the constitutional inhibition against the impairment of the obligation of contracts. ... In this case the Supreme Court of Minnesota has held that the charter of the company, as well as the common law, required the railroad, as to existing and future streets, to maintain them in safety, and to hold its charter rights subject to the exercise of the legislative power in this behalf, and that any contract which undertook to limit the exercise of this right was without consideration, against public policy and void. This doctrine is entirely consistent with the principles decided in the cases referred to in this court.”

In C., I. & W. Ry. Co. v. Connersville, 218 U. S. 336, 343, supra, a street was opened through an embankment upon which the railroad tracks were laid. At the time of the construction of the railroad that part of the embankment was outside the City limits. But the City was extended, and the intersecting street was laid out in order to provide a suitable means of communication between the parts of the City on either side of the embankment. On reviewing the judgment entered in the condemnation proceeding, it was held that there was no violation of the Fourteenth Amendment in refusing to allow to the company the cost of building a bridge for its tracks over the opening made by the street. “The question,” said the court, “as to the right of the railway company to be reimbursed for any moneys necessarily expended in constructing the bridge in question is, we think, concluded *441 by former decisions of this court. . . . The railway, company accepted its franchise from the State, subject necessarily to the condition that it would conform at its. own expense to any regulations, not arbitrary in their character, as to the opening or use of streets, which had for their object the safety of the public, or the promotion of the public convenience, and which might, from time to time, be established by the municipality, when proceeding under legislative authority — within whose limits the company’s business • was conducted. . . .. Without further discussion, . , . we adjudge upon the authority of former cases, that there was no error in holding that the City could not be compelled to reimburse the railway company for the cost of the bridge in question.”

Under the doctrine of these decisions, it necessarily follows that if the City of Minneapolis had opened a public road through the embankment of the plaintiff in error, the latter would have had no ground to complain that its constitutional rights had been violated because it was compelled to bridge the gap at its own cost. No different rule could be applied because the highway was laid out in order to increase the advantages of a public park.. In this aspect, it would be equally a crossing devoted to the public use (Shoemaker v. United States, 147 U. S. 282, 297); and we see no basis for a distinction in principle in the case of an intersecting public road opened under competent authority because such a highway might lead to public recreation grounds instead of to places of business, or might connect lakes instead of avenues.

If there is a distinction in the present- case, it must lie in the fact that the crossing is an artificial waterway instead of a road. But it is none the less a public highway, established to afford an appropriate place of public passage. Walks aré provided for those who go afoot, and it does not concern the plaintiff in error that others go in *442 boats instead of vehicles. "The way sought to be established,” said the Supreme Court of Minnesota, p. 465, "a canal or waterway, with walks along each side” was "clearly a public way, subject to the rules governing public ways.” It cannot make a difference in the constitutional rights of the Railway Company that this way was not constructed entirely, or chiefly, of solid earth; it is the fact, and not the mode, of public passage that is controlling. The case must be regarded as being one of a public crossing provided by law; and the authorities we have cited lead to the conclusion that the State, without infringing the guaranties of the Federal Constitution, could .require the Railway Company to make suitable provision for carrying, its tracks over the crossing without compensation.

The judgment is affirmed.

Affirmed.