¶ 1. This case pits a small emergent weedbed along the shores of Lake Superior in Bayfield, Wisconsin, against the developer of a private marina on those same shores. The Wisconsin Department of Natural Resources sided with the weedbed, and denied the developer a dredging permit needed to complete the final phase of the marina development. The case has an ironic twist: the small emergent weed-bed would not have "emerged" at all were it not for the calming effect of a breakwater the developer had built in the early stages of the project. The presence of the emergent weedbed prompted the DNR to block the developer's construction of the last set of boat slips in the marina, 71 out of a total of 272 slips.
¶ 2. So the developer took the DNR to court, alleging a regulatory taking without just compensation. The case was dismissed on summary judgment, and the court of appeals affirmеd, concluding that because the developer retained the benefit of all or substantially all of its property — including over 200 boat slips and various recreational facilities associated with the marina onshore — the denial of a permit for the construction of the remaining boat slips was not an unconstitutional taking.
¶ 3. We affirm. As takings law has evolved, there is no compensable categorical taking unless the regulatory action in question deprives a propеrty owner of all economically beneficial use of his property. We do not perform the analysis piecemeal, but, rather, consider the property as a whole in order to determine the extent of the deprivation. Because the denial of the *503 dredging permit did not deny the marina developer all economically beneficial use of its property, there was no categorical regulatory taking.
¶ 4. Further, and again considering the property аs a whole, the regulatory action in this case at most affected only the developer's riparian right of reasonable access to the lake, which is subordinate to the public trust doctrine. Therefore, the DNR's action did not so severely impact or interfere with the developer's reasonable investment expectations as to constitute an unconstitutional taking under traditional, ad hoc takings analysis.
i — 1
¶ 5. The relevant facts are undisputed. R.W. Docks, a general partnership in the business of developing marinas, is the riparian owner of 1100 feet of frontage along Lake Superior in Bayfield, Wisconsin. In 1969, Docks began building a marina, called Port Superior, on this lake frontage land. At the outset, Docks sought and obtained permits from the DNR and the Army Corps of Engineers to construct a breakwater and boat harbor in connection with the marina development.
¶ 6. The marina was then built in stages. The initial phases of the project consisted of the brеakwater, several docks eventually containing 201 boat slips, a sea wall, a lagoon, a solid pile quay structure placed on the lakebed, a port, racquetball club, tennis court, and supporting infrastructure. Throughout the gradual development of the marina, Docks sought and received the necessary permits from the DNR, including dredging permits pursuant to Wis. Stat. § 30.20.
¶ 7. In 1977, Docks converted the marina into condominiums. The 201 condominium boat slips, each *504 of which included an undivided interest in the common areas of the marina facilities, were developed and sold before Docks obtained the necessary permits to complete construction of the final 71 boat slips at the marina.
¶ 8. In 1983, Docks applied to the DNR for a permit to dredge 20,000 cubic yards of material from the lakebed, a necessary prerequisite to the completion of the remaining 71 boat slips. The DNR, after expressing concern over the environmental impact of the dredging, divided the application in two, the first to remove 5,000 cubic yards, and the second to remove 15,000 cubic yards of lakebed material. The DNR then granted the first dredging permit. In 1986, the DNR denied the second, larger dredging permit, and without the permit, the final 71 boat slips could not be built.
¶ 9. The permit was denied primarily because a small emergent weedbed had developed near the shore within the marina as a result of the sheltering effect of the breakwater that Docks had built. Weedbeds, evidently, are good for many things, including the proliferation of game fish, forage fish and associated macroinvertebrates and zooplankton, and so the DNR acted to protect this environmentally sensitive natural resource.
¶ 10. After exhausting available administrative appeals and judicial review of the DNR's action, Docks sued the DNR in circuit court alleging an unconstitutional taking of its property without just compensation. The Bayfield County Circuit Court, the Honorable Thomas J. Gallagher, grаnted the DNR's motion for summary judgment, concluding that: (1) Docks did not have a recognizable property interest in the 71 undeveloped boat slips; (2) even if Docks had a recognizable property interest in the 71 undeveloped boat slips, *505 there was no unconstitutional taking because its riparian right to construct structures on the bed of Lake Superior was subject to the public trust doctrine; and (3) there was no unconstitutional taking because Docks retained considerable prаctical use of the property.
¶ 11. The court of appeals affirmed only the last conclusion of the circuit court, refraining from addressing the alternate arguments. The court of appeals agreed that the denial of the final dredging permit did not constitute a regulatory taking because Docks maintained the benefit and use of all or substantially all of its marina property. Furthermore, the court concluded that Docks assumed the risk inherent in commencing the project without all necessary permits, and therefore any economic loss it suffered as a result of the inability to build the last 71 slips could not be transferred to the State on a regulatory takings theory. We accepted review.
h-i
. ¶ 12. We review a circuit court's decision granting or denying a motion for summary judgment independently, using the same methodology as the circuit court.
Wisconsin Dep't of Corrections v. Kliesmet,
¶ 13. The issue in this case is whether the DNR's denial of the final dredging permit constituted a regulatory taking of Docks' property without just
*506
compensation. This is also a question of law that we review without deference to the lower courts.
Zealy v. City of Waukesha,
Takings jurisprudence has developed from two competing principles: on one hand, respect for the property rights of individuals; on the other, recognition that the government retains the ability, in furtherance of the interests of all citizens, to regulate an owner's potential uses of land. Thus, in Euclid v. Ambler Realty Co.,272 U.S. 365 ,47 S.Ct. 114 ,71 L.Ed. 303 (1926), the United States Supreme Court hеld municipal zoning to be a permissible exercise of the police power, while in Pennsylvania Coal Co. v. Mahon,260 U.S. 393 , 415,43 S.Ct. 158 , 159-60,67 L.Ed. 322 (1922), the Court held that "while property may be regulated to a certain extent, if regulation goes too far it will be recognized as a taking." Such takings are described as "constructive" or "regulatory" takings.
Zealy,
¶ 14. "A 'taking' need not arise from an actual physical occupation of land by the government."
Eberle v. Dane County Bd. of Adjust.,
¶ 15. In determining whether a regulatory restriction "goes too far" for purposes of the Fifth Amendment, the United States Supreme Court has generally "eschewed any 'set formula' for determining how far is too far, preferring to ’engag[e] in. . .essentially ad hoc, factual inquiries."
Lucas,
¶ 16. The DNR's denial of the dredge permit in this case did not bring about a physical invasion of private property. Nor did it deny Docks all economically beneficial or productive use of its property, or substantially all practical use of its property, inasmuch as it retained the economic benefit and use of the 201 boat slips and related recreational facilitiеs at the marina. Accord *508 ingly, there has been no categorical regulatory taking under Lucas and Zealy.
¶ 17. We are left, then, with the ad hoc factual, traditional takings inquiry of
Penn Central
and
Zealy.
This involves an analysis of the nature and character of the governmental action, the severity of the economic impact of the regulation on the property owner, and the degree to which the regulation has interfered with the property owner's distinct investment-backed expectations in the property.
Zealy,
¶ 18. But first there is a threshold question, and that is the nature and extent of the private property interest at stake here. This case involves riparian rights, which are subject to and limited by the public trust doctrine. The State argues that the bed and waters of Lake Superior belong to the public, not Docks, and so no taking of private property occurred. Indeed, the Supreme Court has stated that:
[t]he hallmark of a protected property interest is the right to exclude others. That is "one of the most essential sticks in the bundle of rights that are commonly characterized as property." Kaiser Aetna v. United States,444 U.S. 164 , 176,100 S.Ct. 383 ,62 L.Ed.2d 332 (1979). That is why the right that we all possess to use the public lands is not the "property" right of anyone — hence the sardonic maxim, explaining what economists call the "tragedy of the commons," res publica, res nullius.
Coll. Sav. Bank v. Florida Prepaid Postsecondary Educ. Expense Bd.,
¶ 19. The public trust doctrine originated in the Northwest Ordinance of 1787 and the Wisconsin Constitution, Article IX, Section l.
1
See Gillen v. City of Neenah,
"The title to the beds of all lakes and ponds, and of rivers navigable in fact as well, up to the line of ordinary high-water mark, within the boundaries of the state, became vested in [the state] at the instant of its admission into the Union, in trust to hold the same so as to preserve to the people forever the enjoyment of the waters of such lakes, ponds, and rivers, to the same extent that the public are entitled to enjoy tidal waters at the common law."
State v. Trudeau,
¶ 20. The legislature administers the trust for the protection of the public's rights, and it may use the power of regulation to effectuate the intent of the trust.
Id.
at 498. In this regard, as applicable here, the legislature has declared it to be unlawful to place a structure on the bed of a navigable waterway unless a permit has been granted by the DNR, or unless the structure is otherwise authorized by statute.
3
See
Wis. Stats. §§ 30.12, 30.13;
Cassidy v. DNR,
*511
¶ 21. However, subj ect to the requirements of the public trust doctrine, "Wisconsin has.. .recognized the existence of certain common law rights that are incidents of riparian ownership of property adjacent to a body of water."
Bleck,
[t]he right to reasonable use of the waters for domestic, agricultural and recreational purposes; the right to use the shoreline and have access to the waters; the right to any lands formed by accretion or reliction; the right to have water flow to the land without artificial obstruction; the limited right to intrude onto the lakebed to construct devices for protection from erosion; and the right, now conditioned by statute, to construct a pier or similаr structure in aid of navigation.
Cassidy v. DNR,
¶ 22. The rights of riparian owners, however, are qualified, subordinate, and subject to the paramount interest of the state and the paramount rights of the public in navigable waters.
Bleck,
[E]very.. .right which a riparian owner acquires, as such, to the waters ... by his land, is restricted always to that which is a . . . reasonable use, and these terms are to be measured and detеrmined by the extent and capacity of the [lake], the uses to which it has been put, and the rights that other riparian owners on the same [lake] also have.
*512
Id. (citing Apfelbacher v. State,
¶ 23. The public trust doctrine as an encumbrance on riparian rights is established "by judicial authority so long acquiesced in as to become a rule of property."
Franzini v. Layland,
¶ 24. The DNR's denial of the dredging permit affected only Docks' ability to cоnstruct the final 71 boat slips on the bed and in the waters of Lake Superior, and, as such, implicated only Docks' riparian rights, which are subject to the public trust doctrine. Assuming that riparian rights, subordinate as they are to the rights of the public, are included in the "bundle of rights" recognized as private property for purposes of Fifth Amendment takings analysis, Docks has failed to demonstrate a compensable regulatory taking under Penn Central and Zealy. 4
*513
¶ 25. In
Zealy,
we noted that the United States Supreme Court has not endorsed an analysis that subdivides a contiguous property for purposes of determining whether a compensable taking has occurred.
Zealy,
[Rjather, the Court has consistently held that a landowner's property in such a case should be considered as a whole.
" 'Taking'" jurisprudence does not divide a single parcel into discrete segments and attempt to determine whether rights in a particular segment have been entirely abrogated. In deciding whether a particular governmentаl action has effected a taking, this Court focuses rather both on the character of the action and on the nature and extent of the interference with rights in the parcel as a whole....
Penn Central,438 U.S. at 130-31 ,98 S.Ct. at 2662-63 . Similarly, in Keystone [Bituminous Coal Ass'n v. DeBenedictis],480 U.S. at 498 ,107 S.Ct. at 1248-49 , the Court noted practical arguments *514 against allowing the segmentation of the property at issue:
"Many zoning ordinances place limits on the property owner's right to make profitable use of some segments of his property. A requirement that a building occupy no more than a specified percentage of the lot on which it is located could be charactеrized as a taking of the vacant area. . . . [0]ne could always argue that a setback ordinance requiring that no structure be built within a certain distance from the property line constitutes a taking because the footage represents a distinct segment of property for takings law purposes."
Zealy,
¶ 26. The Supreme Court has reaffirmed its opposition to subdividing property for purposes of takings analysis:
[W]e rejected this analysis years ago in Penn Central. . .where we held that a claimant's parcel of property could not first be divided into what was taken and what was left for the purpose of demonstrating the taking of the former to be complete and hence compensable. To the extent that any portion of property is taken, that portion is always taken in its entirety; the relevant question, however, is whether the property taken is all, or only a portion of, the parcel in question.
Concrete Pipe & Prods. v. Constr. Laborers Pension Trust,
¶ 27. Accordingly, we evaluate the character of the DNR's action, its economic impаct and the degree to which it interfered with Docks' investment-backed *515 expectations in light of the marina as a whole rather than the parcel that was to have contained the 71 boat slips. 5 And we do so recognizing that at most, only riparian rights of reasonable access and use, subject to the public trust doctrine, are implicated here.
¶ 28. The DNR acted primarily to protect an emergent weedbed on behalf of the public, and secondarily, to prevent interference with the rights of neighboring riparian owners. Reasonable minds can differ about whether governmental protection of weed-beds is of such a character as to outweigh private property interests. But the state, not Docks, holds title to the lakebed, and therefore, to the extent that a private property interest is implicated here, it is riparian only and therefore qualified in nature, encumbered by the public trust doctrine. We have "jealously guarded thе navigable waters of this state and the rights of the public to use and enjoy them."
Delta Fish and Fur Farms v. Pierce,
¶ 29. Similarly, our evaluation of the severity of the economic impact of the DNR's action, and the extent to which it interfered with Docks' investment- *516 backed expectations, is strongly influenced by the fact that the development of this private marina on the bed and waters of Lake Superior was encumbered by the public trust doctrine and heavily regulated from the get-go. A riparian owner may apply to the DNR for a permit to remove material from or erect a structure on the bed of a navigable waterway in order to facilitate reasonable access and use. But the riparian owner does not have a right to the issuance of a permit if it is detrimental to the public interest. See Wis. Stat. §§ 30.12, 30.13 and 30.20.
¶ 30. Docks alleges that the rеvenue from the sale of the 201 existing boat slips was insufficient to cover the cost of developing the marina and that it has to date lost in excess of $1 million. It claims that the final 71 boat slips would have a combined value of approximately $1.5 million, enough to cover its losses and make a small profit. But the fact that the marina development has thus far yielded a loss does not make out a takings case, and Docks never possessed an unfettered "right" to a particulаr number of boat slips in the first place. Under the circumstances of this case, the DNR's action cannot be said to have "gone too far" to cause the sort of negative economic impact or substantial interference with investment expectations as to amount to a regulatory taking.
¶ 31. In any event, the DNR's denial of the final dredging permit has not interfered with Docks' present economic use of its property, considered as a whole. It has a 201-slip marina, and аssociated recreational facilities, and may have other means of recouping its losses. It is true that Docks' plans for a larger marina have been frustrated, but those plans were encumbered by the public trust doctrine and contingent upon the periodic issuance of DNR permits from the begin
*517
ning.
See Concrete Pipe,
¶ 32. Accordingly, we conclude that the DNR's denial of the final dredging permit did not deny Docks all economically beneficial use of its property, or substantially all practical use of its property, and as such, did not constitute a categorical regulatory taking. In addition, because the DNR's action affected only riparian rights, subordinate to the public trust doctrine, and affected only a small portion of thе marina development as a whole, it cannot be said to have resulted in the sort of severe economic impact or interference with distinct investment-backed expectations as to constitute a regulatory taking under traditional, ad hoc takings analysis.
By the Court. — The decision of the court of appeals is affirmed.
Notes
Wisconsin Const, art. IX, § 1 states:
Jurisdiction on rivers and lakes; navigable waters. The state shall have concurrent jurisdiction on all rivers and lakes bordering on this state so far as such rivers or lakes shall form a common boundary to the state and аny other state or territory now or hereafter to be formed, and bounded by the same; and the river Mississippi and the navigable waters leading into the Mississippi and St. Lawrence, and the carrying places between the same, shall be common highways and forever free, as well as to the inhabitants of the state as to the citizens of the United States, without any tax, impost or duty therefor.
The high water mark is: "[T]he point on the bank or shore up to which the presence and action of the water is so continuous as to leave a distinct mark either by erosion, destruction of terrestrial vegetation, or other easily recognized characteristic."
State v. Trudeau,
A "structure" for these purposes has been defined as "something constructed or built. . .something made up of more or less interdependent elements or parts."
State v. Bleck,
Docks claimed at oral argument that
United States v. Chandler-Dunbar Water Power Co.,
Docks invites us to follow the lead of the United States Court of Appeals for the Federal Circuit in
Loveladies Harbor, Inc. v. United States,
