Me. Justice Burton
delivered the opinion of the Court.
As in First Iowa Coop. v. Federal Power Commission, 328 U. S. 152, this case illustrates the integration of the federal and state jurisdictions in licensing water power projects under the Federal Power Act.1 In the First Iowa case we sustained the authority of the Commission to license a power project to use navigable waters of the United States located in Iowa. Here, without finding that the waters are navigable, the Commission has issued a comparable license for a power project to use waters on lands constituting reservations of the United States located in Oregon. The State of Oregon questions the authority of the Commission to do this and the adequacy of the provisions approved by the Commission for the conservation of anadromous fish.2 For the reasons hereafter stated, we sustain the Commission.
In 1949, the Northwest Power Supply Company of Portland, Oregon, applied to the Federal Power Commission for a license to construct, operate and maintain a hydroelectric plant, constituting Pelton Project No. 2030, [438]*438on reserved lands of the United States on the Deschutes River in Oregon,3 and, in 1951, the Portland General Electric Company of Portland, Oregon, succeeded to a supplementary application for that license.
The Pelton Project is designed to include a concrete dam 205 feet high and a powerhouse containing three 36,000-kilowatt generators. It is to be built across the Deschutes River on reserved lands of the United States located below the junction of its Metolius and Crooked River tributaries.4 The western terminus of the dam is to occupy lands, within the Warm Springs Indian Reservation, which have been reserved by the United States for power purposes since 1910 and 1913.5 The eastern terminus [439]*439of the dam is to be on lands of the United States which, at least since 1909, have been withdrawn from entry under the public land laws and reserved for power purposes.6 The project calls for no permanent diversion of water as the entire flow of the river will run through or over the dam into the natural bed of the stream. This dam will make available the head and volume of water required for the project and the water impounded by it will create a narrow reservoir, submerging lands the title to which is or will be in the United States. Variations and interruptions in the flow of the stream, caused by temporary storage or use of water for power purposes, are to be controlled by a “reregulating dam” approved by the Commission and located on private property, to be acquired, about three miles below the power dam. No objection is made to the reregulating dam. To the extent that access to existing spawning grounds for anadromous fish is cut off by the power dam, other facilities on private property, to be acquired, are to be constructed and maintained on terms approved by the Commission and designed to develop an equal or greater fish population. Opportunities for recreational uses of the area are to be enhanced and no issue as to water pollution is before us.
[440]*440The State of Oregon, the Fish Commission of Oregon, the Oregon State Game Commission and the Oregon Division of the Izaak Walton League intervened before the Commission and each filed objections to the granting of the license. Some of their objections related to the authority of the Commission to grant the license and others to the suitability of the proposed fish conservation facilities.
Following extended hearings, the Commission’s presiding examiner recommended the license. After exceptions to that recommendation the Commission issued its opinion and an order granting the license. 10 F. P. C. 445, 450, 92 P. U. R. (N. S.) 247. The Commission found that a public need exists for the early completion of the project to meet a severe power shortage in the Pacific Northwest. It found also that the project is in the public interest, will provide for comprehensive development of the affected stretch of the Deschutes River, and will be consistent with further comprehensive development of that stream and of the Columbia Basin. It held that the improvements will contribute valuable public benefits which will not be available if the river is maintained in its present natural condition.7 The Commission stated that [441]*441the project will be subject to all existing rights to the use of the waters of the river, whether perfected or not. It prescribed temporary measures to be taken to meet the needs of the anadromous fish during the construction of the project and approved certain permanent facilities, practices and expenditures in relation to such fish. The opinion stated “that no substantial evidence has been brought forward to show that the facilities proposed for conserving the fish will not maintain existing runs. Moreover, there are indications that the runs can be increased.” 10 F. P. C., at 450, 92 P. U. R. (N. S.), at 252.
A rehearing being denied, the State and its agencies sought a review by the Court of Appeals for the Ninth Circuit and the Portland General Electric Company intervened. That court, with one judge dissenting, set aside the Commission’s order. 211 F. 2d 347. It recognized the necessity of a license from the Federal Power Commission but held that Congress, by its public lands legislation, long ago had transferred to the State of Oregon such control over the use of nonnavigable waters that the sponsor of the Pelton Project must secure also the permission prescribed by the State. We granted certio-rari because of the public significance of the issues but denied leave to the Portland General Electric Company to intervene here. 348 U. S. 868. 28 U. S. C. § 1254 (1); 49 Stat. 860-861, 16 U. S. C. § 825l (b). Several States filed briefs as amici curiae, usually adopting as their own the brief filed by respondents.
We divide our consideration of the issues into three parts.
I. Applicability op the Federal Power Act.
On its face, the Federal Power Act applies to this license as specifically as it did to the license in the First Iowa case. There the jurisdiction of the Commission turned [442]*442almost entirely upon the navigability of the waters of the United States to which the license applied. Here the jurisdiction turns upon the ownership or control by the United States of the reserved lands on which the licensed project is to be located.8 The authority to issue licenses [443]*443in relation to navigable waters of the United States springs from the Commerce Clause of the Constitution. The authority to do so in relation to public lands and reservations of the United States springs from the Property Clause — “The Congress shall have Power to dispose of and make all needful Rules and Regulations respecting the Territory or other Property belonging to the United States . . . .” Art. IV, § 3.9
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Me. Justice Burton
delivered the opinion of the Court.
As in First Iowa Coop. v. Federal Power Commission, 328 U. S. 152, this case illustrates the integration of the federal and state jurisdictions in licensing water power projects under the Federal Power Act.1 In the First Iowa case we sustained the authority of the Commission to license a power project to use navigable waters of the United States located in Iowa. Here, without finding that the waters are navigable, the Commission has issued a comparable license for a power project to use waters on lands constituting reservations of the United States located in Oregon. The State of Oregon questions the authority of the Commission to do this and the adequacy of the provisions approved by the Commission for the conservation of anadromous fish.2 For the reasons hereafter stated, we sustain the Commission.
In 1949, the Northwest Power Supply Company of Portland, Oregon, applied to the Federal Power Commission for a license to construct, operate and maintain a hydroelectric plant, constituting Pelton Project No. 2030, [438]*438on reserved lands of the United States on the Deschutes River in Oregon,3 and, in 1951, the Portland General Electric Company of Portland, Oregon, succeeded to a supplementary application for that license.
The Pelton Project is designed to include a concrete dam 205 feet high and a powerhouse containing three 36,000-kilowatt generators. It is to be built across the Deschutes River on reserved lands of the United States located below the junction of its Metolius and Crooked River tributaries.4 The western terminus of the dam is to occupy lands, within the Warm Springs Indian Reservation, which have been reserved by the United States for power purposes since 1910 and 1913.5 The eastern terminus [439]*439of the dam is to be on lands of the United States which, at least since 1909, have been withdrawn from entry under the public land laws and reserved for power purposes.6 The project calls for no permanent diversion of water as the entire flow of the river will run through or over the dam into the natural bed of the stream. This dam will make available the head and volume of water required for the project and the water impounded by it will create a narrow reservoir, submerging lands the title to which is or will be in the United States. Variations and interruptions in the flow of the stream, caused by temporary storage or use of water for power purposes, are to be controlled by a “reregulating dam” approved by the Commission and located on private property, to be acquired, about three miles below the power dam. No objection is made to the reregulating dam. To the extent that access to existing spawning grounds for anadromous fish is cut off by the power dam, other facilities on private property, to be acquired, are to be constructed and maintained on terms approved by the Commission and designed to develop an equal or greater fish population. Opportunities for recreational uses of the area are to be enhanced and no issue as to water pollution is before us.
[440]*440The State of Oregon, the Fish Commission of Oregon, the Oregon State Game Commission and the Oregon Division of the Izaak Walton League intervened before the Commission and each filed objections to the granting of the license. Some of their objections related to the authority of the Commission to grant the license and others to the suitability of the proposed fish conservation facilities.
Following extended hearings, the Commission’s presiding examiner recommended the license. After exceptions to that recommendation the Commission issued its opinion and an order granting the license. 10 F. P. C. 445, 450, 92 P. U. R. (N. S.) 247. The Commission found that a public need exists for the early completion of the project to meet a severe power shortage in the Pacific Northwest. It found also that the project is in the public interest, will provide for comprehensive development of the affected stretch of the Deschutes River, and will be consistent with further comprehensive development of that stream and of the Columbia Basin. It held that the improvements will contribute valuable public benefits which will not be available if the river is maintained in its present natural condition.7 The Commission stated that [441]*441the project will be subject to all existing rights to the use of the waters of the river, whether perfected or not. It prescribed temporary measures to be taken to meet the needs of the anadromous fish during the construction of the project and approved certain permanent facilities, practices and expenditures in relation to such fish. The opinion stated “that no substantial evidence has been brought forward to show that the facilities proposed for conserving the fish will not maintain existing runs. Moreover, there are indications that the runs can be increased.” 10 F. P. C., at 450, 92 P. U. R. (N. S.), at 252.
A rehearing being denied, the State and its agencies sought a review by the Court of Appeals for the Ninth Circuit and the Portland General Electric Company intervened. That court, with one judge dissenting, set aside the Commission’s order. 211 F. 2d 347. It recognized the necessity of a license from the Federal Power Commission but held that Congress, by its public lands legislation, long ago had transferred to the State of Oregon such control over the use of nonnavigable waters that the sponsor of the Pelton Project must secure also the permission prescribed by the State. We granted certio-rari because of the public significance of the issues but denied leave to the Portland General Electric Company to intervene here. 348 U. S. 868. 28 U. S. C. § 1254 (1); 49 Stat. 860-861, 16 U. S. C. § 825l (b). Several States filed briefs as amici curiae, usually adopting as their own the brief filed by respondents.
We divide our consideration of the issues into three parts.
I. Applicability op the Federal Power Act.
On its face, the Federal Power Act applies to this license as specifically as it did to the license in the First Iowa case. There the jurisdiction of the Commission turned [442]*442almost entirely upon the navigability of the waters of the United States to which the license applied. Here the jurisdiction turns upon the ownership or control by the United States of the reserved lands on which the licensed project is to be located.8 The authority to issue licenses [443]*443in relation to navigable waters of the United States springs from the Commerce Clause of the Constitution. The authority to do so in relation to public lands and reservations of the United States springs from the Property Clause — “The Congress shall have Power to dispose of and make all needful Rules and Regulations respecting the Territory or other Property belonging to the United States . . . .” Art. IV, § 3.9
In the instant case the project is to occupy lands which come within the term “reservations,” as distinguished from “public lands.” In the Federal Power Act, each has its established meaning. “Public lands” are lands subject to private appropriation and disposal under public [444]*444land laws. “Reservations” are not so subject.10 The title to the lands upon which the eastern terminus of the dam is to rest has been in the United States since the cession by Great Britain of the area now comprising the State of Oregon. Even if formerly they may have been open to private appropriation as “public lands,” they were withdrawn from such availability before any vested interests conflicting with the Pelton Project were acquired.11 Title to the bed of the Deschutes River is also in the United States.12 Since the Indian Treaty of 1855, the lands within the Indian reservation, upon which the western end of the dam will rest, have been reserved for the use of the Indians. More recently they were reserved for power purposes13 and the Indians have given their consent to the project before us. Accordingly, there is no issue here as to whether or not the title to the tribal lands is in the United States.14
There thus remains no question as to the constitutional and statutory authority of the Federal Power Commission [445]*445to grant a valid license for a power project on reserved lands of the United States, provided that, as required by the Act, the use of the water does not conflict with vested rights of others.15 To allow Oregon to veto such use, by requiring the State’s additional permission, would result in the very duplication of regulatory control precluded by the First Iowa decision. 328 U. S. 152, 177-179. No such duplication of authority is called for by the Act.16 The Court of Appeals in the instant case [446]*446agrees. 211 F. 2d, at 351. And see Washington Department of Game v. Federal Power Commission, 207 F. 2d 391, 395-396. Authorization of this project, therefore, is within the exclusive jurisdiction of the Federal Power Commission, unless that jurisdiction is modified by other federal legislation. See United States v. Rio Grande Irrigation Co., 174 U. S. 690, 703; Gutierres v. Albuquerque Land Co., 188 U. S. 545, 554.
II. Inapplicability of the Desert Land Act of 1877 and Related Acts.
The State of Oregon argues that the Acts of July 26, 1866,17 July 9, 1870,18 and the Desert Land Act of [447]*447187719 constitute an express congressional delegation or conveyance to the State of the power to regulate the use of these waters. The argument is that these Acts preclude or restrict the scope of the jurisdiction, otherwise apparent on the face of the Federal Power Act, and require the consent of the State to a project such as the one before us.
The nature and effect of these Acts have been discussed previously by this Court. The purpose of the Acts of 1866 and 1870 was governmental recognition and sanction [448]*448of possessory rights on public lands asserted under local laws and customs. Jennison v. Kirk, 98 U. S. 453. The Desert Land Act severed, for purposes of private acquisition, soil and water rights on public lands, and provided that such water rights were to be acquired in the manner provided by the law of the State of location. California Oregon Power Co. v. Beaver Portland Cement Co., 295 U. S. 142. See also, Nebraska v. Wyoming, 325 U. S. 589, 611-616.
It is not necessary for us, in the instant case, to pass upon the question whether this legislation constitutes the express delegation or conveyance of power that is claimed by the State, because these Acts are not applicable to the reserved lands and waters here involved. The Desert Land Act covers “sources of water supply upon the public lands . . . .” The lands before us in this case are not “public lands” but “reservations.” Even without that express restriction of the Desert Land Act to sources of water supply on public lands, these Acts would not apply to reserved lands. “It is a familiar principle of public land law that statutes providing generally for disposal of the public domain are inapplicable to lands which are not unqualifiedly subject to sale and disposition because they have been appropriated to some other purpose.” United States v. O’Donnell, 303 U. S. 501, 510. See also, United States v. Minnesota, 270 U. S. 181, 206. The instant lands certainly “are not unqualifiedly subject to sale and disposition . . . .” Accordingly, it is enough, for the instant case, to recognize that these Acts do not apply to this license, which relates only to the use of waters on reservations of the United States.
III. Application op the Federal Power Act to This Project.
Finally, respondents question the discretion used by the Commission in granting the license. They point to [449]*449the consequences which the project will have beyond the limits of the reserved lands on which it will be located.
The first consequence is the inevitable variation in, or the temporary interruption of, the flow of the stream. The Commission is satisfied that it has overcome this objection by its provision for a reregulating dam. It has approved the technical features involved and the site for that dam will be acquired in accordance with the property laws of Oregon.20 In this reregulation of the flow of the stream, the Commission acts on behalf of the people of Oregon, as well as all others, in seeing to it that the interests of all concerned are adequately protected.
There remains the effect of the project upon anadro-mous fish which use these waters as spawning grounds. All agree that the 205-foot dam will cut off access of some fish to their natural spawning grounds above the dam and that such interruption cannot be overcome by fish ladders.21 However, the State does not flatly prohibit the construction of dams that cut off anadromous fish from their spawning or breeding grounds.22 One alternative, [450]*450thus recognized, is the supplying of new breeding pools to which the fish can be removed at appropriate times.23 The Fish Commission of Oregon has denied a permit to the Portland General Electric Company to carry out its present proposal but there appears to be no disagreement as to the underlying principle involved.24 hereby authorized to grant such permit in its discretion, upon the condition that the person so applying for such permit shall convey to the state of Oregon a site of the size and dimensions satisfactory to the commission, at such place as may be selected by the commission, and erect thereon a hatchery and hatchery residence, according to plans and specifications to be furnished by the commission, and enter into an agreement with the commission, secured by a good and sufficient bond, to furnish all water and’ light, without expense, to operate said proposed hatchery; and no permit for the construction of any such dam shall be given by the commission until the person applying for such permit shall have actually conveyed said land to the state and erected said hatchery and hatchery residence in accordance with the said plans and specifications. . . .” (Italics supplied.) Ore. Comp. Laws, 1940, § 83-316.
[451]*451The applicant has agreed to provide facilities for conserving the runs of anadromous fish in accordance with plans approved by the Federal Power Commission. The capital cost of these facilities and of the reregulating dam, to be borne by the applicant, is estimated at $4,430,000. The total annual cost due to these facilities is estimated at $795,000. The Commission has found each of these estimates to be reasonable. Of the $795,000 annual cost, the applicant will bear $410,000 (cost of borrowed money, depreciation and taxes on the capital investment), and the $10,000 maintenance cost of the reregulating dam. In addition, it has offered to contribute $100,000 annually [452]*452toward the estimated $375,000 cost of operation and maintenance of the fish conservation facilities, and the Commission has retained the power to fix the amount of the applicant’s contribution if a sum is not agreed upon.
The care given to the preparation of this conservation program and the large investment to be made in it are impressive. It also is of interest that the Fish Commission of Oregon already is operating somewhat comparable but smaller facilities of this kind on the Metolius River.
One argument against the project goes beyond the need to conserve the existing fish population. It is argued that the project will preclude the carrying out of certain plans for the Columbia River Basin which contemplate greatly enlarging the fish population in the Deschutes River area, by concentrating there other runs of fish not now using that river. While such an argument may properly be directed to the Federal Power Commission or to Congress, it is not one for us to answer upon the basis of existing legal rights.
We conclude, therefore, that, on the facts here presented, the Federal Power Act is applicable in accordance with its terms, and that the Federal Power Commission has acted within its powers and its discretion in granting the license now before us.
The judgment of the Court of Appeals, accordingly, is
Reversed.
Mr. Justice Harlan took no part in the consideration or decision of this case.