**425Plaintiffs seek a declaration that the City of Lake Oswego must allow them recreational access to Oswego Lake, either from the shoreline of the city's waterfront parks-from which the city prohibits all water access-or through the city's residents-only swim park. According to plaintiffs, the common-law doctrines of public trust and public use protect the public's right to enter the lake, and the city's restrictions on access to the lake are contrary to those common-law doctrines. Plaintiffs also contend that the city's restrictions violate the Equal Privileges and Immunities guarantee of the Oregon Constitution, Article I, section 20. Defendants are the City of Lake Oswego and the State of Oregon, as well as the Lake Oswego Corporation, which holds title to riparian rights to the lake.
We conclude that the trial court correctly granted summary judgment on plaintiffs' Article I, section 20, challenges. We also conclude that neither the public trust nor the public use doctrine grants plaintiffs a right to enter the swim park property and that the public use doctrine does not grant plaintiffs a right to access the water from the waterfront parks. But we conclude that, if Oswego Lake is among the navigable waterways that the state holds in trust for the public, then neither the state nor the city may unreasonably interfere with the public's right to enter the water from the abutting waterfront parks. Accordingly, the case **426must be remanded for resolution of the preliminary question of whether the lake is subject to the public trust doctrine and, if the lake is subject to that trust, then for resolution of the factual dispute regarding whether the city's restriction on entering the lake from the waterfront parks unreasonably interferes with the public's right to enter the lake from the abutting waterfront parks.
I. BACKGROUND
Most of the land surrounding Oswego Lake is privately owned, but the city has an interest in four properties that abut the lake. Along an area of the lake known as Lakewood Bay, the city has created three waterfront parks, called Millennium Plaza Park, Sundeleaf Plaza, and Headlee Walkway. The fourth property is a small swim park on city land abutting the shore of the main lake.
Recorded ownership claims to the land surrounding Oswego Lake date to 1850, when two early settlers staked a federal Donation Land Claim to land abutting what was then called Sucker Lake. Eventually, a company called Oregon Iron & Steel acquired all of the property surrounding the lake and, over time, built dams and an artificial channel. Those projects increased the lake to its current size. In the early 20th century, Oregon Iron & Steel created a residential development around the lake. In doing so, the company platted subdivisions and changed the lake's name to "Oswego Lake." When the company sold off the lots abutting the lake, it reserved to itself ownership of the riparian rights and then transferred those rights to Lake Oswego Corporation, whose shareholders-waterfront property owners and others-pay dues in exchange for access to the lake.
During the same era, Oregon Iron & Steel deeded two parcels of waterfront land to the city, with a covenant that the land was to be used "by the resident children of Lake Oswego" for purposes of recreation. Those parcels became the swim park, which is open during July and August each year. The swim park land is fenced on three sides and bordered on the water side by a fenced dock, which creates a small, enclosed swimming area-smaller than an Olympic-size pool-and prevents access from the park to the open **427lake. The city limits use of the park to city residents and limits water activities to swimming.
More recently, the city acquired the properties on which the three downtown, waterfront parks are located. Two of those parks, Headlee Walkway and Sundeleaf Plaza, have physical barriers that prohibit entry into the water. Millennium Plaza Park, which the city acquired through condemnation, has steps that lead from the park to the water. Millennium Plaza Park also has a grassy area from which plaintiff Prager entered the lake in the past. Although the waterfront parks are open to the public, the city has prominently posted signs at Millennium Plaza Park announcing, *7"Private Lake. Please stay on the steps." The city also passed a resolution prohibiting entry into the water from the city's waterfront parks. That resolution provides, in pertinent part:
"It is prohibited for any person to enter Oswego Lake from Millennium Plaza Park, Sundeleaf Plaza or the Headlee Walkway by any means or method, including, without limitation, by wading or swimming, or by using water vessels or other floatation devices.
"20. Leaving the Pathway Portion of the Headlee Walkway
"It is prohibited for any person to leave the pathway portion of the Headlee Walkway when using that facility, or to climb, traverse, or occupy the fencing or the planted areas adjacent to the path."
(Underscoring in original.)
Plaintiffs, who have no access to the private land surrounding the lake, filed suit under the Uniform Declaratory Judgments Act, ORS 28.010 to 28.160. They alleged that they have an interest in swimming in and kayaking on the lake, and they sought declarations that the city's waterfront-parks resolution and the city's resident-only policy for the swim park are invalid. Plaintiffs' amended complaint asserts three bases on which they contend that the restrictions are invalid.
**428In their first claim, plaintiffs allege that, even if the beds of Oswego Lake are privately owned, the waters of the lake are owned by the State of Oregon and
"are held in trust for the preservation of the public right of recreation, including paddling, canoeing, boating, and swimming, and other public rights which all citizens enjoy in such waters under common law[.]"
Thus, plaintiffs allege, the resolution and residents-only swim park rule are unlawful and preempted by the "Public Trust Doctrine and/or Public Use Doctrine."
In their second claim for relief, plaintiffs similarly allege that the resolution and swim park rule are unlawful and preempted by the "Public Trust Doctrine and/or Public Use Doctrine." But on this claim, plaintiffs request a declaration that "the submerged and submersible lands below the ordinary high water mark of the Lake have been and are owned by the State of Oregon and held in trust for the public since the time of statehood[.]"
Finally, in their third claim for relief, plaintiffs allege that both the waterfront-parks resolution and the swim-park rule violate Article I, section 20, of the Oregon Constitution, by effectively "granting to a small class of citizens monopolistic privileges of access to the waters of the Lake, which upon the same terms, did not equally belong to all citizens."
Plaintiffs filed a motion for partial summary judgment on their first claim, contending that the public has a right to use the lake as a matter of law, regardless of ownership, and defendants each filed cross-motions for summary judgment. In resolving the motions against plaintiffs' first two claims, the trial court assumed that the public has a right to use the lake under the "public trust" and "public use" doctrines, but the court determined that neither doctrine gave the public a right to use the city's land to reach the water. Thus, the trial court granted defendants' motions against plaintiffs' common-law claims and declined to resolve the preliminary question of whether the public has a right to use the lake under either the "public trust" or "public use" doctrine. The trial court also determined that **429the city's policies did not violate Article I, section 20, and, therefore, granted defendants' summary judgment on the third claim for relief as well. The Court of Appeals agreed with the trial court's reasoning and affirmed the grant of summary judgment to defendants. Kramer v. City of Lake Oswego ,
As the case is presented to this court, we assume-without deciding-that Oswego Lake is among the navigable waterways that the state holds in trust for the public. Neither the trial court nor the Court of Appeals addressed the preliminary question of the lake's status, and defendants do not contend that the lake's status can be resolved as a matter of law. Defendants argue instead that, regardless of the public's interest in the lake as a whole, the Court of Appeals correctly concluded that plaintiffs are not entitled to the declaratory relief that they have sought. We agree with the Court of Appeals in part. We conclude that, regardless of the lake's status, neither the public use doctrine nor Article I, section 20, entitle plaintiffs to the declarations that they seek. However, if plaintiffs are correct that the lake is a navigable waterway subject to the public trust doctrine, then genuine issues of material fact preclude a determination on summary judgment that the city is authorized to prohibit the public from entering the water from the public waterfront parks. Accordingly, we reverse the judgment for defendants on plaintiffs' second claim for relief and remand for the trial court to resolve the remaining issues, including whether the lake is publicly owned.
Plaintiffs' three claims for relief all depend to some extent on their premise that the assumed public interest in **430Oswego Lake includes a right of access to the water from the abutting upland. Thus, we begin with an overview of the public's interest in waterways, generally.
A. Overview of the Public Right to Use Oregon Waters
In Oregon, two related doctrines create a public right to use certain bodies of water, regardless of who owns the abutting upland. The first applies to bodies of water that are considered navigable as a matter of federal law. Title to the lands underlying those navigable waters passed to the state when Oregon was admitted into the Union, to be "held in trust for the public uses of navigation and fishery[.]" Corvallis Sand & Gravel v. Land Board ,
The first doctrine originates with the British claim to ownership of the land that became the United States. PPL Montana ,
*9**431The British monarchs claimed the same authority over the bodies of water on the American continent, and that claim of the sovereign's dominion was transferred to the original thirteen states following the American Revolution. Pacific Elevator ,
As the other states later joined the union, with the status of "coequal sovereigns under the Constitution[,]" the same principle of ownership was extended to waters within **432the borders of each state. PPL Montana ,
In addition to that doctrine of public ownership of the lands underlying navigable bodies of water, Oregon also enforces the public's right to use other waterways that are "navigable in a qualified or limited sense." Luscher ,
Thus, for waterways subject to the "public trust" doctrine, the public has a right to use water because the state owns the underlying land in trust for the public, while for waterways subject to the "public use" doctrine, the underlying land remains privately owned. We have emphasized, however, that for either category of waterway, "the public has the paramount right to the use of the waters." Id. at 634-35,
B. Plaintiffs' Right to Gain Access from Land Under the "Public Use" Doctrine
In their first claim for relief, plaintiffs contend that, regardless of ownership of the underlying land, the public has a right to use the water of the lake that includes a right to access the water from the city-owned land that abuts the water. This claim rests on the second of the two doctrines discussed above, the "public use" doctrine. We conclude that the theory behind the doctrine of "public use" does not extend to a right to demand access across the abutting upland to reach the public water. As explained above, the theory of **434the "public use" doctrine is explained as an "easement" to use the water "highways" of the state. See, e.g. , Shaw ,
Thus, this court has applied the doctrine to prevent those who own the underlying land from interfering with the public's use of the waterway as it flows over that private land. See Luscher ,
Indeed, this court has written that where "the bed and banks of the stream are owned by the riparian proprietor, the navigability of the stream does not give to the navigator a right of way on the land. That *11can be acquired only by the exercise of the right of eminent domain." Lebanon Lumber ,
Nevertheless, plaintiffs contend that this court has also applied the doctrine of "public use" to require that abutting land owners permit "the incidental use of beds and banks of Oregon's public waterways." They rely on Weise , in which this court held that the owner of an island in the Willamette River was not entitled to recover in trespass against the defendant, who temporarily attached one line of a boom to the plaintiff's island to direct logs that he was floating downstream.
Out of context, the quotes from Weise could seem to lend some support to plaintiffs' argument. In context, however, Weise identifies a narrow exception to the general rule that those engaged in use of the water highways are prohibited from interfering with the land at all. We explained that the defendant, who was engaged in the business of floating logs down to a sawmill in Oregon City, out of "necessity" placed a boom above Willamette Falls to prevent the logs from being swept over the falls as they entered the river. To trap the logs, one line of the boom was temporarily attached to the plaintiff's island. But, attached in that way, the line "intercepted the most convenient course of the plaintiff's skiff, in which he was accustomed to pass to and from Oregon City, his ordinary market place."
To the extent that Weise remains good law, it should be understood as a narrow exception to the rule that this court repeatedly announced in later cases, that "the navigability of the stream does not give to the navigator a right **436of way on the land." Lebanon Lumber,
But plaintiffs do not seek just an incidental and temporary burden on the land that is a "necessity" to continue their existing use of the water. Rather, plaintiffs seek a declaration that the owner of abutting upland must allow the public to use that land to enter the lake in the first instance. The "public use" doctrine does not support that declaration. Thus, the trial court correctly granted summary judgment on plaintiffs' first claim for relief, which rests on the public's right to use a waterway even when the underlying land is privately owned.
*12C. Plaintiffs' Right to Gain Access to the Water Under the "Public Trust" Doctrine
Plaintiffs' second claim for relief alleges a right of access to the lake that is premised on the state's alleged ownership of the underlying land in trust for the public.
1. Whether the "public trust" doctrine protects a right of passage from public land
Plaintiffs contend that the "public trust doctrine" imposes obligations on the state that would preclude it from enacting the type of restrictions on access to public water that the city has adopted. As we will explain, we agree with that proposition. We pause to emphasize, however, that the doctrine of public ownership of the beds and banks of navigable waters and the so-called "public trust" doctrine are independent doctrines, as the Supreme Court cautioned in PPL Montana ,
**438Thus, we must determine as a matter of state law whether the public's rights with respect to publicly-owned waters includes a right to enter the water from public land. As explained above, Oregon acquired title at statehood to the lands underlying all bodies of water within the state that meet the federal test for navigability. With respect to those publicly-owned waters, this court's cases describe the public's right in terms of the beneficial interest of one for whom land is held in *13"trust," rather than the "easement" theory that is used in the cases involving the public's right to use water flowing over privately-owned beds. For example, this court has explained that, although title passed to the state to "lands underlying the navigable waters of the state," the state's " 'rights were merely those of a trustee for the public' "; in its ownership of those lands, " 'the state represents the people, and the ownership is that of the people in their united sovereignty, while the waters themselves remain public so that all persons may use the same for navigation and fishing.' " Corvallis Sand & Gravel ,
The public trust doctrine in Oregon is codified in part by statutes that declare that the waters of all navigable lakes are "of public character" and that title to what the statute refers to as "submersible and submerged lands" beneath navigable lakes is vested in the State of Oregon. ORS 274.025(1) ;
**439ORS 274.430(1).
Our cases to date, however, have not addressed whether public ownership of the submerged and submersible land underlying publicly-owned waters includes any right of access to that water. Early public trust cases primarily explored limits on the state's ability to dispose of the tidelands (or "tide-lands") within its borders. See, e.g. , Hinman v. Warren ,
Those cases are of limited relevance, for two main reasons. First, cases suggesting that the state has some ability to dispose of tidelands are of limited relevance because Oswego Lake is not affected by the tides. This court has described the state's ownership of lands that "are covered and uncovered by the tide" as of a different character than the state's ownership of other "lands lying under the navigable waters of the state." Winston Bros. ,
Second, and regardless of whether the state could dispose of the lands underlying Oswego Lake, the state has not disposed of its interest in those lands. Thus, if plaintiffs are able to establish that Oswego Lake is navigable under the federal test, then the lands underlying the lake remain owned by "the people in their united sovereignty" and held in trust for the public. Corvallis Sand & Gravel , 250 Or. at 334,
**441Defendants suggest that the most relevant guidance for answering that question comes from Morse v. Oregon Division of State Lands ,
That conclusion is consistent with a principle explained in Illinois Central Railroad , which Morse described as "the bellwether" of public trust cases. Morse ,
Plaintiffs argue that this court has already answered that question in a way that recognizes a public right to enter publicly-owned waters from abutting public land, relying on Darling v. Christensen ,
In the course of reaching that conclusion, however, this court considered more broadly the "character" of the plaintiffs' title to the "meander land," including with respect to public streets that had their "termini" at the high-water border of the plaintiffs' land.
**443Defendants question, however, whether that statement in Darling announced a right to access the lake under the "public trust" doctrine, and we agree that the discussion of the public's right of access to the lake appears to have been unnecessary to this court's resolution of the plaintiffs' claim that their littoral rights to access the water from their private property entitled them to an easement across the private land that separated their property from the open water. Neither the state nor the "public" generally were parties to that dispute, and no mention is made of the "public trust" doctrine. Rather, the court's statement about the public's right of access to the public water is based on its conclusion regarding the nature of rights possessed by the holder of littoral or riparian rights generally.
Nevertheless, the littoral or riparian rights of an owner of upland property to use the abutting water, as identified in Darling , bear some similarity to the rights that the owner of submerged and submersible lands has to use the water covering that land. We addressed those rights in the context of a private ownership interest in Eagle Cliff Fishing Co. v. McGowan ,
Although Eagle Cliff discussed the rights of a private owner of submersible land, we described a similar right arising from public ownership of submerged and submersible lands, albeit in dicta , in Smith Tug , 250 Or. at 638,
Both Eagle Cliff and Smith Tug thus suggest that the rights flowing from ownership of submersible lands includes a right to pass from the upland border of that land to the adjacent water. That principle lends support to plaintiffs' proposal that public ownership of the submerged and submersible land underlying a navigable waterway provides a public right to enter that water from abutting upland that is designated for public use.
Plaintiffs also urge this court to follow the approach of courts in other states that have explicitly identified a right to access public water. For example, the Iowa Supreme Court has held that the public's right to use the water for purposes expressly protected under the public trust doctrine may "require means of public access" to that water. State v. Sorensen ,
The Montana Supreme Court has endorsed a similar principle. Public Lands Access Ass'n v. Board of County Com'rs of Madison County ,
New Jersey has taken a more expansive approach under its public trust doctrine, recognizing that the public's right of access to public ocean beaches can include a right to cross private uplands to reach the ocean. Matthews v. Bay Head Imp. Ass'n ,
We agree with the rationale that underlies the decisions in all three states: The public's ability to use the water for purposes expressly protected under the public trust doctrine may "require means of public access" to that water. See Sorensen ,
**446Morse ,
We have held in the context of the public's right to fish that the state "in its sovereign capacity in trust for its people" may regulate and even prohibit the public's right to fish in navigable waters of state. Anthony et al. v. Veatch et al. ,
Neither the legislature nor this court has mandated specific requirements or prohibitions to govern the state's management of the waters that it holds in trust for the public as a whole. Yet even when a trustee has discretion with respect to how trust property is managed, the trustee's actions must satisfy the "general standard of reasonableness" in exercising that discretion. Rowe v. Rowe et al. ,
2. Whether "public trust" limitations apply to the city
According to plaintiffs, if the lake is publicly-owned, then the public trust doctrine limits the city's ability to interfere with the public's right of access to the lake, just as it limits the state's ability to interfere with that access. Defendants respond that the public trust doctrine should not limit the actions of a city because it is the state that has been assigned the role of trustee for the publicly-owned waters. The Court of Appeals agreed with defendants, explaining that "[p]laintiffs have not identified, nor are we aware of, any controlling authority for their proposition that, 'as a subdivision of the State [, the city] shares in public trust responsibilities' " and concluding that the "city is not an 'instrumentality' or agent of the state for that purpose." Kramer ,
Whether or not the city shares fully in the state's "public trust responsibilities," the city has affirmatively acted to prevent public access to the allegedly publicly-owned lake, and plaintiffs challenge those actions as invalid. Applying our analytical framework for evaluating such challenges to a city's actions, we conclude that the city lacks authority to take action that the state would be precluded from taking under the public trust doctrine.
**448In general, Oregon cities have " 'home rule' " authority " 'to regulate to the extent provided in their charters.' " State v. Uroza-Zuniga ,
Although the home rule provisions mean that the constitution directly grants to cities their authority to exercise a portion of state power, this court long ago explained that the enactment of the home-rule constitutional provisions has not changed the fundamental character of cities as "instrumentalities" or "agencies" of the State of Oregon. Klamath Falls v. Oregon Liquor Control Comm. ,
"Pure municipal corporations, such as cities, are merely instrumentalities of the state, established for the convenient administration of local government; they are state governmental agencies; they are auxiliaries of the state for the purpose of local self government; they are mere political subdivisions of the state created by authority of the state for the purpose of exercising a part of its powers[.]"
**449
That is consistent with the approach taken by the United States Supreme Court with respect to cities under the federal constitution. As that Court has explained, "fundamentally, a municipality is merely a political subdivision of the State from which its authority derives." United Building & Constr. Trades v. Mayor ,
Just as the state and federal constitutions limit the state's authority to interfere with certain protected conduct, Oregon's public trust doctrine limits the state's authority to interfere with the public's right to use the public waters of the state. Specifically, we have concluded that the doctrine limits the state's authority to interfere with the public's right to enter the publicly-owned waters from abutting upland that is open to the public. Restrictions on that right must be objectively reasonable in light of the purpose of **450the trust and the circumstances of the case. Because the state's authority to enact restrictions on the public's access to publicly-owned waters is limited in that way, the same limitations apply to the authority of a city, to which the constitution has assigned a portion of the authority of the state.
3. Application to this case
Our conclusion that the city may not unreasonably interfere with the public's ability to enter the public water from abutting upland that is open to the public has two consequences for plaintiffs' claim under the public trust doctrine. First, the rule does not implicate the residents-only swim park policy because that policy denies public entry to the upland in the first place, not entry into the water from upland that is open to the public. Second, our conclusion means that the validity of the waterfront resolution depends upon whether the restriction on the public's right to enter the water from that public upland is objectively reasonable under the circumstances. That question can only be answered after genuine issues of material fact are resolved on remand. The list of pertinent material facts, of course, begins with whether the city is correct that the lake is not among those navigable waters for which the state holds title to the underlying land. If the city's premise is incorrect, then additional relevant circumstances include the extent to which the denial of water access from the waterfront parks impairs the public's ability to use the public water and whether the prohibition reasonably furthers the purpose of the trust in other ways. On this record, the trial court erred in concluding that defendants are entitled to summary judgment on plaintiffs' second claim for relief.
D. Plaintiffs' Challenge Under Article I, section 20 .
Plaintiffs' third claim for relief seeks a declaration that both the waterfront resolution and the swim park policy unequally distribute the privilege of lake access according to classifications based on residency, in violation of Article I, section 20. That Oregon *20constitutional provision specifies that "[n]o law shall be passed granting to any citizen or class of citizens privileges, or immunities, which, upon the same terms, shall not equally belong to all citizens." **451Or. Const., Art. I, § 20. With respect to the waterfront resolutions, plaintiffs contend that the prohibition on entering the water unconstitutionally creates a monopoly on lake use for the class of citizens who are shareholders of Lake Oswego Corporation. With respect to the swim park policy, plaintiffs contend that the city has unlawfully granted the privilege of use only to a class of citizens who are city residents. On this record, we are not persuaded that either the waterfront resolution or the swim park policy violates Article I, section 20.
1. Whether the waterfront resolution violates Article I, section 20 .
Plaintiffs' challenge to the waterfront resolution fails because it is not the kind of law that triggers scrutiny under Article I, section 20. As explained at the outset of this opinion, that resolution prohibits "any person to enter Oswego Lake from Millennium Plaza Park, Sundeleaf Plaza or Headlee Walkway by any means or method, including, without limitation, by wading or swimming, or by using water vessels or other floatation devices." (Emphasis added.) Thus, the text of the resolution applies "upon the same terms" to all people.
Despite that facial neutrality, plaintiffs argue that the resolution violates Article I, section 20, because it has a "practical exclusionary effect." Plaintiffs emphasize that, apart from the downtown parks, access to the land abutting Oswego Lake is monopolized by the class of private land owners who are shareholders in Lake Oswego Corporation. For individuals who are not members of that privileged class, the shoreline of the downtown parks is the only potential entry point into water that-we are asked to assume-all Oregonians have a right to use. Under those circumstances, plaintiffs argue, the resolution violates Article I, section 20, by permitting members of a privileged class to monopolize "the commonly held resource." Plaintiffs insist that this court has invalidated other similar laws under Article I, section 20, when "the side-effect of a seemingly non-discriminatory enactment is to create an impermissible privileged class." But plaintiffs' understanding of our case law is not correct.
**452Article I, section 20, addresses government grants of a privilege or immunity in an unequal manner. As we explained in greater detail in State v. Savastano ,
The privilege that plaintiffs seek at the waterfront parks is the privilege of entering the water from the shoreline of the waterfront property to engage in recreational activities like boating or paddle boarding on the lake. But that is not a privilege that the city has granted to anyone. Although shareholders of Lake Oswego Corporation have the ability to enter the water from private property elsewhere along the lakeshore, that privilege is a product of private property rights. It is not a government-granted privilege, so it does not implicate Article I, section 20.
The cases on which plaintiffs rely do not suggest a different approach. Rather, they reflect the same constitutional concern with preventing the government from unequally granting state-created privileges or immunities. See Zockert v. Fanning ,
Plaintiffs' challenge to the swim park policy rests on stronger footing. We have emphasized that "every law itself can be said to 'classify' what it covers from what it excludes[,]" but that Article I, section 20, is addressed to "a law's disparate treatment of persons or groups by virtue of characteristics which they have apart from the law in question." State v. Clark ,
As an initial matter, we emphasize what is clear from the text of the provision and from our cases construing it: Article I, section 20, does not prohibit all differentiation in the granting of privileges and immunities. It prohibits only the granting of privileges or immunities that are not "equally" available "upon the same terms." See Savastano ,
Defendants point to the small size of the swim park and the cost required to operate it safely and argue that the city is constitutionally permitted to limit the privilege of park use to residents to "ensure[ ] that those who pay for the park through their local taxes and fees actually get to use the park[.]" The Court of Appeals held that the city "reasonably could decide to limit the swim park's use" to address those concerns. Kramer ,
Plaintiffs argue, however, that the Court of Appeals gave too much deference to the city's justification for the policy. According to plaintiffs, this court's cases require "heightened scrutiny" of a local government enactment that creates a monopoly, particularly a monopoly on "commonly held natural resources, *22" which plaintiffs contend is the effect of the swim park policy. Alternatively, plaintiffs argue that the policy is not even "rational" because the city could have addressed its concerns by simply charging a user fee to nonresidents.
We begin with plaintiffs' contention that this court employs a qualitatively different analysis-a "heightened scrutiny"-when reviewing grants of a local monopoly or monopoly on a natural resource, and we ultimately reject that view of our case law. We pause to emphasize, however, that plaintiffs' term "heightened scrutiny" invokes the three-tiered framework that the United States Supreme **455Court employs under the Equal Protection Clause of the Fourteenth Amendment to the United States Constitution. That framework uses the term "heightened scrutiny" to describe how the Court reviews classifications that it considers to warrant an "intermediate" level of scrutiny, such as a law that discriminates on the basis of gender. See Hewitt v. SAIF ,
We most clearly announced our independent analytical path in Hewitt , in which we declined to adopt the Supreme Court's standard for analyzing Equal Protection challenges to laws that differentiate on the basis of gender.
That independent analysis in Hewitt led this court to depart from the Equal Protection test for laws that discriminate on the basis of gender and to hold that a classification based on gender is "like racial, alienage and nationality classifications" because it "focuses on 'immutable' personal characteristics" and "can be suspected of reflecting **456'invidious' social or political premises, that is to say, prejudice or stereotyped prejudgments."
Apart from classifications based on the "immutable" personal characteristics discussed in Hewitt , however, this court has not described differentiation in the granting of privileges or immunities as "suspect." Instead, we have used various formulations over the years to explain the test for whether a distinction based on characteristics that are not "immutable" violates Article I, section 20, all of which amount to the test by which the Court of Appeals evaluated the swim park distinction at issue here. For much of the twentieth century, this court tended to ask whether there was a "reasonable basis" for the legislation, a question that included whether the legislation was enacted for a legitimate purpose. See, e.g. , State v. Wright ,
*23State v. Nicholls ,
Later, this court began asking whether the distinction between classes was "rational," and eventually that term came to be our consistent formulation of the test. See, e.g. , Seto v. Tri-County Metro. Transportation ,
Thus, it appears that in evaluating whether the city permissibly grants the privilege of swim park entry only to city residents, the Court of Appeals correctly focused on whether the city "reasonably" could decide to exclude nonresidents from the park as a way of ensuring that the facility was available to residents. Nevertheless, plaintiffs argue that the nature of the privilege that the city has granted is so important that any differentiation must be justified by more than a rational basis. Plaintiffs contend that under this court's cases, "[t]here is no basis for deferential review when a local government's enactment creates a monopoly for local citizens[.]" (Emphasis in original.) Plaintiffs also contend that our cases have applied a qualitatively different test-a "virtually per se" prohibition-on laws that create a monopoly on "commonly held natural resources," and they argue that the swim park policy similarly should be prohibited.
Plaintiffs are correct that grants of monopolies are a matter that is of particular concern in our Article I, section 20, cases. See Clark ,
We acknowledge that one early case could appear to support plaintiffs' proposed rule of a "virtually per se " prohibition on laws that grant monopolies to "commonly held natural resources." In Hume v. Rogue River Packing, Co .,
Thus, the Court of Appeals correctly asked whether the city's swim park exclusion is "rational." As we have explained, the question of whether the differential treatment is rational depends on whether the classification reflects a "genuine difference" that bears a "reasonable relationship" to the legitimate legislative purpose. Knapp ,
We begin by considering the nature of the challenged action. The city has granted only to city residents the privilege to enter the city swim park. There are no genuine issues of material fact regarding the nature of that privilege. The swim park occupies two of the parcels originally platted by Oregon Iron & Steel. The side of the park that abuts the lake is bordered by a three-sided, fenced dock, which creates a small, enclosed swimming area. According to plaintiff Prager, the swimming area is "smaller than an Olympic-size swimming pool." The park, which is open only during July and August, features diving platforms, water sprayers, inner tube games, outdoor showers and lounge chairs. Entrance to the park is free and provides access to the enclosed swimming area, which is monitored by certified lifeguards. The city's rules do not permit anyone to fish or **461boat on the enclosed water of the swim area, and there is no evidence that the park affords access to the open waters of the lake. In other words, whether or not the lake as a whole is a common public resource, there is no evidence that the privilege of entering the swim park is more than the privilege to use a city-created recreational facility.
The next question is whether the entrance restriction bears a reasonable relationship to the city's purpose in managing the city facility. On that point, the record contains undisputed evidence that there are costs to the city associated with managing the swim park, such as employing lifeguards. Nor is there any dispute that the number of people who can safely use the park is limited by its size. Limiting use of that facility to city residents is one way to address the city's management concerns about size and cost.
Plaintiffs' only argument for why we should reject the Court of Appeals' conclusion that the residents-only restriction bears a reasonable relationship to the identified purpose is to point out that a "user fee" also would address the city's fiscal concerns. That argument misapprehends the nature of the court's inquiry. As we have explained, if a classification bears "some rational relationship to a legitimate state interest[,]" then it is "immaterial that available alternatives may be better suited to carry out the rationale[.]" School District No. 12 ,
III. CONCLUSION
We conclude that the public's interest in the navigable waterways that are held in trust by the state includes a right of access to the publicly-owned water from abutting public land and that state interference with the public's exercise of that right must be objectively "reasonable" in **462light of the purpose of the trust and the circumstances of each case. We also conclude that cities are subject to the same limitations on their authority to restrict the public's right of access to publicly-owned water. Finally, assuming that Oswego Lake is a navigable waterway held in trust by the state, we conclude that genuine issues of material fact preclude a determination that the waterfront resolution *26is a "reasonable" restriction on the public's right of access. Thus, the trial court erred in granting summary judgment to defendants on plaintiffs' claim for a declaration that the waterfront resolution exceeds the city's authority as limited by the public trust doctrine. The trial court did not err in granting summary judgment on plaintiffs' remaining claims for relief.
Accordingly, the decision of the Court of Appeals is reversed in part and affirmed in part. The judgment of the trial court is remanded for a declaratory judgment in favor of defendants on plaintiffs' first and third claims for relief, and the judgment is reversed and remanded for further proceedings to resolve part of plaintiffs' second claim for relief (which seeks a declaration that the waterfront resolution exceeds the city's authority as limited by the public trust doctrine).
In general, the term "riparian rights" refers to rights associated with land adjacent to navigable bodies of water, including the right of access to the water from the land. Darling v. Christensen ,
There is another small swim park on the lake that is seasonally open only to individuals residing within the boundaries of the former Lake Grove School District. That park is not owned by the city and is not at issue in this case.
The Court of Appeals also concluded that the trial court erred in dismissing the case rather than entering a declaration as to the parties' rights and, for that reason, vacated and remanded for the court to enter a declaratory judgment. Kramer ,
Although plaintiffs ask this court to resolve the lake's public status in their favor on the undisputed facts, plaintiffs did not seek summary judgment on that basis. Accordingly, we decline to address that question for the first time on review.
The Act of Feb. 14, 1859, admitting Oregon into the Union, provided in part that: "All the navigable waters of said State, shall be common highways and forever free, as well as to the inhabitants of said State as to all other citizens of the United States, without any tax, duty, impost, or toll therefor." Act of Feb. 14, 1859, ch. 33, § 2,
Ancient origins of the doctrine can be found in the more comprehensive Roman law promulgated by Emperor Justinian, which provided:
"1. Thus, the following things are by natural law common to all-the air, running water, the sea, and consequently the sea-shore. No one therefore is forbidden access to the seashore, provided he abstains from injury to houses, monuments, and buildings generally; for these are not, like the sea itself, subject to the law of nations.
"2. On the other hand, all rivers and harbours are public, so that all persons have a right to fish therein.
"3. The sea-shore extends to the limit of the highest tide in time of storm or winter.
"4. Again, the public use of the banks of a river, as of the river itself, is part of the law of nations; consequently every one is entitled to bring his vessel to the bank, and fasten cables to the trees growing there, and use it as a resting-place for the cargo, as freely as he may navigate the river itself. But the ownership of the bank is in the owner of the adjoining land, and consequently so too is the ownership of the trees which grow upon it.
"5. Again, the public use of the sea-shore, as of the sea itself, is part of the law of nations; consequently every one is free to build a cottage upon it for purposes of retreat, as well as to dry his nets and haul them up from the sea. But they cannot be said to belong to any one as private property, but rather are subject to the same law as the sea itself, with the soil or sand which lies beneath it."
The Institutes of Justinian , Book II, Title I, translated into English by J.B. Moyle, 5th ed. (1913).
The term "equal footing" captures only a piece of the legal theory under which the State of Oregon claims title to the beds of navigable water. For most purposes, this opinion will use the more descriptive term "state ownership."
For the purposes of determining state title under federal law, a body of water is considered navigable if, at the time of statehood, in its natural and ordinary condition, the body of water was "used, or [was] susceptible of being used *** as [a] highway[ ] for commerce, over which trade and travel [were] or [could have been] conducted in the customary modes of trade and travel on water." PPL Montana ,
This court emphasized in Guilliams that many lakes of the state are not suitable for commercial navigation but
"are used-and as population increases, and towns and cities are built up in their vicinity, will be still more used-by the people for sailing, rowing, fishing, fowling, bathing, skating, taking water for domestic, agricultural, and even city purposes, cutting ice, and other public purposes which cannot now be enumerated or even anticipated. To hand over all these lakes to private ownership, under any old or narrow test of navigability, would be a great wrong upon the public for all time, the extent of which cannot, perhaps, be now even anticipated."
Plaintiffs argue that they were entitled to a partial declaration that the public has a right to use the lake, regardless of whether they can prevail on their first claim for relief. The Court of Appeals expressed skepticism that plaintiffs' trial court pleadings presented that issue but also concluded that the trial court was not required to grant a partial declaration under the circumstances of this case. Kramer ,
For convenience, we refer to those navigable bodies of water that are subject to the public trust doctrine as "publicly-owned water," although technically the state holds title to the land underlying the water.
Water is not the only resources that the state holds in trust. See State v. Dickerson ,
Although the nature of the trust is a matter of state law, Illinois Central Railroad suggests that some fundamental principles may set a floor for the state's management of public trust waters.
ORS 274.025(1) provides:
"The title to the submersible and submerged lands of all navigable streams and lakes in this state now existing or which may have been in existence in 1859 when the state was admitted to the Union, or at any time since admission, and which has not become vested in any person, is vested in the State of Oregon. The State of Oregon is the owner of the submersible and submerged lands of such streams and lakes, and may use and dispose of the same as provided by law."
ORS 274.430(1) provides:
"All meandered lakes are declared to be navigable and public waters. The waters thereof are declared to be of public character. The title to the submersible and submerged lands of such meandered lakes, which are not included in the valid terms of a grant or conveyance from the State of Oregon, is vested in the State of Oregon."
ORS 274.430(3) specifies, however, that the state ownership of the "submersible and submerged lands" does not impair "the title of any upland or riparian owner."
Morse is the first case in which this court described the law governing the publicly-owned waters as the "public trust doctrine."
Darling refers to that land between the high- and low-water marks surrounding the lake as "meander land,"
Darling explains that the term "littoral rights" is equivalent to "riparian rights" but is the more technically accurate term when referring to the rights of landowners abutting a lake.
The decision explains that the state had granted these "tidelands" to the United States, which had leased them to the plaintiff. Eagle Cliff ,
Other states have rejected the New Jersey approach with respect to private lands but have not considered the question of access rights from public land. See
Although plaintiff Kramer seeks a right to enter the swim park to reach the water, the only evidence is that the swim park provides no point of access to the water for the activity in which Kramer alleges an interest-canoeing on the lake.
We need not decide whether the city shares fully in the state's duties as trustee for the publicly-owned waterways. For purposes of the declarations that plaintiffs seek, it is enough to conclude that any limitations on the state's ability to interfere with the public's right to use the public trust waters are, similarly, limits on the city's authority.
An example of a class that we have said does not exist independently of the statutes relating to that class is the class consisting of persons who do not have commercial driver's licenses. State v. Orueta ,
It does not appear that any city ordinance specifies the restriction, but a sign posted on the external fence specifies "Lake Oswego Residents Only."
There is no reason that the analytical framework for Article I, section 20, would track the analytical framework for the Equal Protection Clause. As we have explained, the "Reconstruction Congress, which adopted the fourteenth amendment in 1868, was concerned with discrimination against disfavored groups or individuals, specifically, former slaves. When [A]rticle I, section 20, was adopted as a part of the Oregon Constitution nine years earlier, in 1859, the concern of its drafters was with favoritism and the granting of special privileges for a select few." Hewitt ,
This court's early decisions sometimes used alternative terms that it seemingly equated to "reasonableness." See, e.g. , City of Klamath Falls v. Winters ,
By contrast, as plaintiffs averred in the trial court, the city also operates a number of parks along the Willamette River that provide access to the open waters of the river, and the city does not limit the use of those parks to city residents.
