Amicus Curiae Brief — United Water Conservation District, Petitioner v. United States
Supreme Court briefNov 28, 2025
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No. 25-523
In the
Supreme Court of the United States
UNITED WATER CONSERVATION DISTRICT,
Petitioner,
v.
UNITED STATES,
Respondent.
On Petition For A Writ Of Certiorari To The United
States Court Of Appeals For The Federal Circuit
BRIEF OF ATLANTIC LEGAL FOUNDATION
AS AMICUS CURIAE
IN SUPPORT OF PETITIONER
Lawrence Ebner
Counsel of Record
Atlantic Legal Foundation
1701 Pennsylvania Avenue,
NW, Suite 200
Washington, DC 20006
(202) 729-6337
lawrence.ebner@
atlanticlegal.org
120739
Nancie G. Marzulla
Marzulla Law, LLC
1150 Connecticut Avenue, NW,
Suite 1050
Washington, DC 20036
(202) 822-6760
nancie@marzulla.com
Attorneys for Amicus Curiae
A
(800) 274-3321 • (800) 359-6859
i
TABLE OF CONTENTS
Page
TABLE OF AUTHORITIES...................................... iii
INTEREST OF THE AMICUS CURIAE ...................1
INTRODUCTION ........................................................2
SUMMARY OF ARGUMENT .....................................3
ARGUMENT ...............................................................6
I. This Court Has Consistently Analyzed the
Government’s Appropriation of a Right to Use
Water as a Per Se Taking .......................................6
A.
The court below misread this Court’s
rulings in the leading water rights taking cases:
International Paper, Gerlach, and Dugan ..........7
1.
Under the Federal Circuit’s new water
rights taking rule, even International Paper,
Gerlach, and Dugan would be considered
regulatory takings ...........................................9
2.
That the water rights were riparian did
not figure into the Court’s taking analysis in
Gerlach and Dugan ........................................ 12
3.
Although Penn Central identified
relevant factors for ad hoc, fact-based inquiry
for analyzing takings, that case did not
overrule its earlier water rights decisions .... 14
B.
The court below misread its own ruling in
Casitas................................................................ 16
ii
C.
The court below mistakenly concluded
that appropriative water rights under California
law do not vest as property rights until the
water has been diverted .................................... 20
II. The Rationale Behind Treating the Taking of
Water Rights as Per Se or Physical Takings Is
Consistent With the Nature of the Water Right
and the Court’s Analysis of Other Discrete
Interests in Property Such as Trade Secrets and
Money ..................................................................... 24
CONCLUSION .......................................................... 30
iii
TABLE OF AUTHORITIES
Cases
Page(s)
Allegretti & Co. v. Cnty. of Imperial,
138 Cal. App. 4th 1261 (2006) ............................. 26
Argent v. United States,
124 F.3d 1277 (Fed. Cir. 1997) ............................ 24
Baley v. United States,
134 Fed. Cl. 619 (2017) ..........................................7
Ball v. United States,
1 Cl. Ct. 180 (1982) .............................................. 27
Boise Cascade Corp. v. United States,
296 F.3d 1339 (Fed. Cir. 2002) ............................ 24
Brown v. Legal Found. of Washington,
538 U.S. 216 (2003) ........................................ 26, 27
Casitas Mun. Water Dist. v. United States,
543 F.3d 1276 (Fed. Cir. 2008) .. 5, 7, 16, 17, 18, 19
Cedar Point Nursery v. Hassid,
594 U.S. 139 (2021) .............................................. 28
Dugan v. Rank,
372 U.S. 609 (1963) .................. 3, 4, 6, 8, 10, 11, 13
Eddy v. Simpson,
3 Cal. 249 (Cal. 1853) .......................................... 24
Griggs v. Allegheny County,
369 U.S. 84 (1962) ................................................ 11
iv
Hodel v. Irving,
481 U.S. 704 (1987) .............................................. 27
Int’l Paper Co. v. United States,
282 U.S. 399 (1931) ...................... 3, 4, 5, 6, 8, 9, 10
Ivanhoe Irrigation Dist. v. All Parties,
47 Cal. 2d 597 (1957) ........................................... 25
Ivanhoe Irrigation Dist. v. McCracken,
357 U.S. 275 (1958) .............................................. 25
Kidd v. Laird,
15 Calif. 161 (1860) .............................................. 25
Klamath Irrigation v. United States,
129 Fed. Cl. 722 (2016) ..........................................7
Loretto v. Teleprompter Manhattan CATV Corp.,
458 U.S. 419 (1982) .............................................. 26
Louisville Joint Stock Land Bank v. Radford,
295 U.S. 555 (1935) .............................................. 27
McDonald v. Bear River & Auburn Water & Min. Co.,
13 Calif. 220 (1859) .............................................. 25
Millview Cnty. Water Dist. v. State Water Res.
Control Bd.,
229 Cal. App. 4th 879 (2014) ............................... 21
Palazzolo v. Rhode Island,
533 U.S. 606 (2001) .............................................. 15
Penn Cent. Transp. Co. v. City of New York,
438 U.S. 104 (1978) ................................ 4, 8, 15, 16
v
Pennsylvania Coal Co. v. Mahon,
260 U.S. 393 (1922) ................................ 8, 9, 14, 15
People of the State of California v. United States,
235 F.2d 647 (9th Cir. 1956) ................................ 20
People v. Shirokow,
605 P.2d 859 (Cal. 1980) ................................ 22, 23
Portsmouth Co. v. United States,
260 U.S. 327 (1922) .............................................. 11
Ruckelshaus v. Monsanto Co.,
467 U.S. 986 (1984) .............................................. 27
San Bernardino Valley Mun. Water Dist. v. Meeks &
Daley Water Co.,
226 Cal. App. 2d 216 (Cal. App. 1964) ..................7
San Diego Gas & Elec. Co. v. City of San Diego,
450 U.S. 621 (1981) .............................................. 15
Store Safe Redlands Associates v. United States,
35 Fed. Cl. 726 (1996) .......................................... 27
Tahoe-Sierra Pres. Council, Inc. v. Tahoe Reg'l Plan.
Agency,
535 U.S. 302 (2002) ............................................ 2, 3
Tulare Lake Basin Water Storage Dist. v. United
States,
49 Fed. Cl. 313 (2001) ............................................7
United States v. Causby,
328 U.S. 256 (1946) .............................................. 11
vi
United States v. Fallbrook Pub. Util. Dist.,
165 F. Supp. 806 (S.D. Cal. 1958) ................. 13, 20
United States v. Gerlach Live Stock Co.,
339 U.S. 725 (1950) ............ 3, 4, 6, 8, 11, 12, 13, 25
United States v. State Water Resources Control Bd.,
182 Cal. App.3d 82 (1986).................................... 25
Washoe Cnty., Nev. v. United States,
319 F.3d 1320 (Fed. Cir. 2003) ............................ 16
Yee v. Escondido,
503 U.S. 519 (1992) ............................................ 2, 3
Statutes
Cal. Water Code § 1225 ............................................. 21
Cal. Water Code § 1381 ............................................. 21
Cal. Water Code § 1455 ............................................. 23
Cal. Water Code § 1610 ............................................. 23
Cal. Water Code §§ 1052, 1831 ................................. 22
Cal. Water Code §§ 1201, 1240, 1253, 1257 ............. 21
Cal. Water Code §§ 1205, 1225 ................................. 21
1
INTEREST OF THE AMICUS CURIAE 1
Established in 1977, the Atlantic Legal
Foundation (ALF) is a national, nonprofit,
nonpartisan, public interest law firm whose mission is
to advance the rule of law and civil justice by
advocating for individual liberty, free enterprise,
property rights, limited and responsible government,
sound science in judicial and regulatory proceedings,
and effective education, including parental rights and
school choice. With the benefit of guidance from the
distinguished legal scholars, corporate legal officers,
private practitioners, business executives, and
prominent scientists who serve on its Board of
Directors and Advisory Council, the Foundation
pursues its mission by participating as amicus curiae
in carefully selected appeals before the Supreme
Court, federal courts of appeals, and state supreme
courts. See atlanticlegal.org.
The Fifth Amendment’s Just Compensation (or
takings) Clause recognizes that private ownership of
property, and in turn, economic liberty, is intrinsic to
our nation’s social fabric. ALF has participated as
amicus curiae in many cases where, as here, overly
aggressive, and indeed avaricious, governmental
action raises serious taking concerns.
Petitioner’s and Respondent’s counsel were provided timely
notice of this brief in accordance with Supreme Court Rule 37.2.
No counsel for a party authored this brief in whole or in part, and
no party or counsel other than the amicus curiae and its counsel
made a monetary contribution intended to fund preparation or
submission of this brief.
1
2
This is such a case. The question presented—
whether the federal government’s taking or impairing
of a private party’s ability to make beneficial use of its
vested water rights should be analyzed as a
regulatory taking rather than a per se or physical
taking—squarely aligns with ALF’s mission of
advocating for protection of private property from
unjust and uncompensated governmental actions.
INTRODUCTION
This Court has never analyzed the taking of
any water right as a regulatory taking. And, other
than the decisions below, no federal court has ever
held that the taking of water rights should be
analyzed as a regulatory taking. The decision below
holds that the taking of Petitioner’s water rights
should be analyzed as a regulatory taking because the
taking was not an actual physical appropriation of the
water or did not require United Water to return water
that it had already diverted. Unless reversed, this
holding would result in the undoing of more than a
century of decisions holding that the taking or
impairment of the ability to make beneficial use of
one’s water right is analyzed as a per se or physical
taking. 2
2 A per se taking, also referred to as a “categorical taking,” may
arise in a regulatory context but its impact on property rights so
closely mirrors a classic physical taking that “‘courts . . . apply a
clear rule.’” Tahoe-Sierra Pres. Council, Inc. v. Tahoe Reg'l Plan.
Agency, 535 U.S. 302, 323 (2002). (quoting Yee v. Escondido, 503
U.S. 519, 523 (1992)). Where, however, a regulation merely
prohibits certain private uses, a court’s analysis “‘necessarily
entails complex factual assessments of the purposes and
3
SUMMARY OF ARGUMENT
The Federal Circuit’s decision conflicts with
more than a century of precedent recognizing water
rights as compensable property and treating
government
appropriations
or
compelled
redistributions of the right to use water as a per se,
physical taking—not a regulatory taking.
This Court has consistently analyzed takings of
water rights under the per se or physical taking
framework in cases such as International Paper, 3
Gerlach, 4 and Dugan, 5 without requiring a
government seizure of already-diverted water or a
physical occupation of land. The court below misread
these decisions by limiting per se treatment to an
actual physical appropriation or to the taking of
riparian rights—a limitation found nowhere in this
Court’s holdings.
In International Paper, the government
requisitioned all of the electricity generated by a
hydropower company, which in turn cut off a paper
company mill’s water supply. This government’s
requisition—a regulatory action—was held to be a per
economic effects of government actions.’” Tahoe-Sierra, 535 U.S.
at 323 (quoting Yee, 503 U.S. at 523).
3 Int’l Paper Co. v. United States, 282 U.S. 399 (1931).
4 United States v. Gerlach Live Stock Co., 339 U.S. 725 (1950).
5 Dugan v. Rank, 372 U.S. 609 (1963).
4
se taking of the paper company’s water rights. 6 Dugan
flatly rejected any requirement of physical invasion,
or appropriation equating the government’s upstream
interference with downstream water rights to
overflight takings. 7 Gerlach similarly treated the
government’s newly adopted plan of operations—a
regulatory action—which reduced adjacent plaintiffs’
farm lands to dried, parched land, as a per se taking
requiring just compensation, stating that “public
interest requires appropriation; it does not require
expropriation.” 8
The
riparian/appropriative
distinction,
employed by the court below, played no role in the
Gerlach and Dugan takings analyses, and all three
cases could have easily been characterized as
regulatory takings under the Federal Circuit’s
analysis. And, contrary to that analysis, California
law recognizes that a state issued water rights permit
is a usufructuary right that is vested property
protected by the Just Compensation Clause.
Also contrary to the ruling of the court below,
this Court’s ruling in Penn Central 9 did not overrule
and does not justify jettisoning a long-standing
physical takings rule for water rights taking cases.
The regulatory takings framework long predates
6 See Int’l Paper, 282 U.S. at 407.
7 See Dugan, 372 U.S at 625.
8 Gerlach, 339 U.S. at 753.
9 Penn Cent. Transp. Co. v. City of New York, 438 U.S. 104 (1978).
5
these decisions and did not displace the per se
analysis applied to appropriations of core property
interests, such as the right to use water. Consistent
with International Paper 10 and this Court’s water
rights takings jurisprudence, the Federal Circuit in
Casitas Municipal Water District v. United States, 11
held that a government-compelled diversion of water
for Endangered Species Act (ESA) purposes
constitutes a physical appropriation of a usufructuary
right, regardless of who turns the valve. 12 Casitas
does not support the holding reached here.
In United Water, 13 as in Casitas, NMFS’s
Biological Opinion required United Water to
reallocate substantial quantities of water to a fish
ladder and to maintain flows in the river to benefit
fish, depriving United Water of roughly 49,800 acrefeet otherwise available for beneficial use 14—facts
that fit squarely within the per se framework.
This case presents a consequential error with
enormous ramifications for the agricultural
community, which has invested countless dollars over
the decades in founding and sustaining their familyowned farms. The decision below invents a novel rule
10 See Int’l Paper, 282 U.S. at 407.
11 Casitas Mun. Water Dist. v. United States, 543 F.3d 1276 (Fed.
Cir. 2008).
12 Casitas, 543 F.3d at 1283.
13 Pet. App 1a–14a.
14 See id. at 4a.
6
that relegates government appropriations of water
rights to being analyzed under the multi-factor, ad hoc
factual analysis suitable for regulatory takings of land
under Penn Central and imposes a burdensome
regulatory requirement not required to ripen any
other water rights taking case.
Review is warranted to restore uniform
adherence to this Court’s takings precedents and to
reaffirm that the per se or physical takings ruling
applies whenever government actions deprive a water
rights holder of the ability to make beneficial use of
its water rights.
ARGUMENT
I.
This Court Has Consistently Analyzed the
Government’s Appropriation of a Right to
Use Water as a Per Se Taking
This Court has never analyzed any water rights
takings case as a regulatory taking. Instead, the
Court has always analyzed the taking of water rights
using the per se taking test. 15 And none of those
rulings required that there be a physical
appropriation or seizure of water for the taking to be
analyzed as a per se taking.
15 See, e.g., Gerlach, 339 U.S. 725 (analyzing government taking
of water owed to claimants under water delivery contracts as
physical taking); see also Dugan, 372 U.S. 609; Int’l Paper, 282
U.S. 399.
7
Until the decision below, the Federal Circuit
too has held that the taking of water rights is analyzed
as a per se taking. 16 The trial court, the U.S. Court of
Federal Claims, has also consistently held that the
taking of water rights is analyzed as a per se taking. 17
And under California law, the taking of water rights
is analyzed as a per se taking. 18
A.
The court below misread this Court’s
rulings in the leading water rights taking
cases: International Paper, Gerlach, and
Dugan
The court of appeals erroneously held that the
physical or per se taking test did not apply here,
limiting the per se test to apply only when the
government physically appropriates the water or
requires the water rights holder “‘to return water it
See, e.g., Casitas, 543 F.3d at 1297 n.17 (holding that the
taking of Casitas’s water rights was “properly analyzed under a
physical taking rubric”).
16
See, e.g., Tulare Lake Basin Water Storage Dist. v. United
States, 49 Fed. Cl. 313, 319 (2001) (“[B]y preventing plaintiffs
from using the water to which they would otherwise have been
entitled, have rendered the usufructuary right to that water
valueless, they have thus effected a physical taking.”); see also
Klamath Irrigation v. United States, 129 Fed. Cl. 722 (2016);
Baley v. United States, 134 Fed. Cl. 619, 660-66 (2017).
17
18 See San Bernardino Valley Mun. Water Dist. v. Meeks & Daley
Water Co., 226 Cal. App. 2d 216, 223, (Cal. App. 1964) (taking of
a shareholder’s right to receive water “amounts to the taking of
a shareholder’s property without just compensation, in violation
of both the State and Federal Constitutions”).
8
had already diverted.’” 19 The court mischaracterized
the leading water rights cases, International Paper, 20
Gerlach, 21 and Dugan, 22 reading these cases to
support its new limited takings rule.
The court below found that the per se taking in
International Paper turned on the finding that the
government “completely cut off [the paper company’s]
access to the water[.]” 23 And the court concluded that
the per se takings in Gerlach and Dugan were because
the water rights were riparian. 24 The court also
concluded that none of the cases even considered
whether the taking was regulatory because this Court
had not yet decided Penn Central, 25 which the court
described as having clarified the regulatory taking
test announced in Pennsylvania Coal Co. v. Mahon. 26
Otherwise, under the lower court ruling, the
taking of water rights is to be analyzed as a regulatory
19 Pet. App. 6a (quoting Pet. App. 38a).
20 Int’l Paper, 282 U.S. 399.
21 Gerlach, 339 U.S. 725.
22 Dugan, 372 U.S. 609.
23 Pet. App. 11a.
24 See id. at 13a.
25 Penn Central, 438 U.S. 104.
26 Pennsylvania Coal Co. v. Mahon, 260 U.S. 393, 413 (1922).
9
taking. 27 No holding of any federal court decision
supports this newly announced rule.
1. Under the Federal Circuit’s new water
rights taking rule, even International
Paper, Gerlach, and Dugan would be
considered regulatory takings
None of this Court’s three leading water rights
cases involved a situation in which the water rights
holder had to return water that had already been
diverted. Not a single one involved an instance where
the federal government physically appropriated the
water rights holder’s water. What unifies all three
cases is that in each case the government
appropriated, by a requisition order or a plan of
operations for a dam, the water rights holder’s right
to use or divert the water for its own beneficial use.
In International Paper, the government had
requisitioned the output of a hydroelectric power
plant on the Niagara River during World War I. 28 The
paper company, however, had a contract from the
permit holder to receive a portion of the water from
the same canal that the power company received its
water. 29 By taking the output of the hydroelectric
plant, the government also cut off the water flow to
27 Id.
28 See Int’l Paper, 282 U.S. at 405–406.
29 See id. at 405.
10
International Paper’s sawmill. 30
The Court held that this mandatory diversion
of water was a per se taking of plaintiff’s right to
receive water. The requisition and redistribution of
hydropower by order of the Secretary of War resulted
in a taking of International Paper’s water rights. 31
The action that gave rise to the taking in
International Paper was a government requisition of
the electric company’s hydroelectric power that
temporarily interrupted the paper company’s water
supply for its sawmill. The government did not take
over the operations of either Niagara Power or
International Paper, nor did it physically direct the
flow of the water. And, importantly, the government
did not require the paper company to return any
water to the power company. The government merely
directed Niagara Power to distribute the electricity to
certain of its customers. 32 Under the court below’s
reasoning, International Paper should have been
analyzed as a regulatory taking.
Likewise, in Dugan, 33 the U.S. Bureau of
Reclamation adopted an operations plan for the
Friant Dam that would diminish water available to
water rights holders, who sued for a taking. The Court
again analyzed the government action as a per se or
30 Id. at 405–406.
31 Id. at 408.
32 Id. at 407.
33 Dugan, 372 U.S. 609.
11
physical taking of the plaintiffs’ water flows.
Comparing the taking of water rights to the taking of
land by overflight, the Dugan court held that a
physical invasion was not required to establish a per
se taking:
A seizure of water rights need not
necessarily be a physical invasion of
land. It may occur upstream, as here.
Interference with or partial taking of
water rights in the manner it was
accomplished here might be analogized
to interference or partial taking of air
space over land[.] 34
But under the court below’s holding, because
the government did not “completely cut off” 35 the
plaintiffs’ water rights in Dugan, the case would be
analyzed as a regulatory taking.
The Court’s decision in Gerlach also involved a
regulation—the government’s operation plan for the
Friant Dam. In Gerlach, implementation of that plan
meant that, except in “rare intervals, there will be no
spill over Friant Dam, the bed of the San Joaquin
along claimants’ lands will be parched, and their grass
lands will be barren.” 36 The Court stated that
34 Id. at 625 (citing Griggs v. Allegheny County, 369 U.S. 84, 89–
90 (1962); United States v. Causby, 328 U.S. 256, 261–263, 267
(1946); and Portsmouth Co. v. United States, 260 U.S. 327, 329
(1922)).
35 Pet. App. 11a.
36 Gerlach, 339 U.S. at 730.
12
Gerlach’s “claim of right” is “to enjoy natural, seasonal
fluctuation unhindered, which presupposes a peak
flow largely unutilized.” 37
There is no hint that this Court applied any
taking test other than a per se taking test in Gerlach.
Instead, the Court emphasized that “[n]o reason
appears why those who get the waters should be
spared from making whole those from whom they are
taken. Public interest requires appropriation; it does
not require expropriation.” 38
2. That the water rights were riparian did
not figure into the Court’s taking
analysis in Gerlach and Dugan
The court below held that Gerlach and Dugan
did not apply to the taking of United Water’s property
(water) rights because United Water held
appropriative water rights, which the court below
erroneously concluded did not become vested water
rights until the water had actually been diverted for
beneficial use. The court below found “significant”
that the water rights at issue in Gerlach and Dugan
were riparian water rights because riparian rights
“exist by virtue of land ownership” and their
acquisition does not “depend on any physical acts of
diversion and beneficial use of water as is required for
37 Id.
38 Id. at 752–53.
13
appropriative water rights.” 39
But, as discussed in this brief, since 1914
appropriative water rights cannot be obtained by
physical diversion—only by a state-issued permit—
and diversion before first obtaining a permit (like
United’s) is not legal under California law. 40
The court below therefore erroneously
concluded that only appropriative water-rights
holders who had physically diverted their water rights
are eligible for the physical taking rule to apply. 41
More importantly, in neither decision did the
Court indicate that its holding was based on the fact
that the water rights were riparian, as opposed to
appropriative. In fact, both cases discuss that
appropriative water rights were also the subject of
federal condemnation actions. 42
In short, the court below simply invented out of
whole cloth a rationale for its new rule.
39 Pet. App. 13a.
United States v. Fallbrook Pub. Util. Dist., 165 F. Supp.
806, 830 (S.D. Cal. 1958).
40 See
41 See Pet. App. 13a.
42 See, e.g., Gerlach, 339 U.S. at 754; see also Dugan, 372 U.S. at
625.
14
3. Although Penn Central identified
relevant factors for ad hoc, fact-based
inquiry for analyzing takings, that case
did not overrule its earlier water rights
decisions
In its opinion below, the court suggested that
International Paper, Gerlach, and Dugan were not
analyzed as regulatory taking cases because the Court
had not yet “clarified” when a regulatory taking went
“too far” so as to constitute a compensable taking. 43
That this Court analyzed its three leading
water rights taking cases as per se takings because it
lacked the constitutional framework to do otherwise
lacks any support in takings jurisprudence.
The regulatory taking test was first announced
by Justice Holmes in 1922, in the seminal case
Pennsylvania Coal Co. v. Mahon, 44 a case in which a
Pennsylvania statute eliminated the company’s
ability to mine coal near support structures on its
property. Writing for the Court, Justice Holmes stated
that “while property may be regulated to a certain
extent, if the regulation goes too far it will be
recognized as a taking.” 45 Because the statute had the
effect of “appropriating or destroying [the coal’s
43 See Pet. App. 13a (internal quotations omitted).
44 Pennsylvania Coal, 260 U.S. 393.
45 Id. at 415.
15
value,]” 46 the Court held that the statute had gone too
far.
Justice Brennan in his now-famous dissent in
San Diego Gas & Electric Co. v. San Diego, 47 described
the Pennsylvania Coal decision as the touchstone of
takings analysis. 48 Later, writing for the Court in
1978, Justice Brennan declared, based on his survey
of fifty years of takings jurisprudence, that “this
Court, quite simply, has been unable to develop any
‘set formula’ for determining when ‘justice and
fairness’ require that economic injuries caused by
public action be compensated by the government,
rather than remain disproportionately concentrated
on a few persons.” 49
Penn Central’s three factors were not identified
as a regulatory taking test, but instead as
“guideposts” as part of an overall fact-based, ad hoc
inquiry in determining whether the Fifth Amendment
has been violated. 50 The Court did not discuss water
rights taking cases nor did the Court indicate that it
was overruling any prior decision in which any per se
or physical taking tests had been applied. Notably,
46 Id. at 414.
47 San Diego Gas & Elec. Co. v. City of San Diego, 450 U.S. 621
(1981).
48 Id. at 649–50 (Brennan, J., dissenting).
49 Penn Central, 438 U.S. at 124.
See Palazzolo v. Rhode Island, 533 U.S. 606, 634 (2001)
(O’Connor, J., concurring).
50
16
even in Penn Central, the Court focused its conclusion
that no taking had occurred on one significant fact: no
economic harm had occurred because the company
could operate the Station profitably even without the
permit and the company could transfer its air rights
to another property it owned downtown. 51
More importantly, the Penn Central formula
has never been applied to recent water rights takings
cases. As the Federal Circuit itself has stated “[i]n the
context of water rights, courts have recognized a
physical taking where the government has physically
diverted water for its own consumptive use or
decreased the amount of water accessible by the
owner of the water rights.” 52
In short, there is no support for the argument
that under Penn Central, the decisions in
International Paper, Gerlach, and Dugan are no
longer good law.
B.
The court below misread its own ruling in
Casitas
In both United Water and Casitas, the
Biological Opinion required the water district to
reduce the quantity of water it was authorized to use
by its permit to increase the river flows available for
the endangered fish. 53 The only factual difference
51 See Penn Central, 438 U.S. at 134–35.
52 Washoe Cnty., Nev. v. United States, 319 F.3d 1320, 1326 (Fed.
Cir. 2003).
53 See Casitas, 543 F.3d at 1291–92; and see Pet. App. 2a–4a.
17
between the two cases was that, as constructed,
Casitas’ fish ladder was fed by water from its
diversion canal while United’s was fed directly by
water flowing through the dam. The key question in
this case is whether that happenstance of fish ladder
construction makes a constitutional difference.
The court below found that the governmentimposed water-use requirements imposed on the
water rights holder were merely “regulatory
restrictions” 54 that did not involve a direct
appropriation of water as occurred in Casitas
Municipal Water District v. United States, which the
court relied on for reaching its decision that the taking
was regulatory. 55 But under the court below’s
decision, the taking of Casitas’s water would likely be
held to be a regulatory taking.
The government in both cases argued that the
taking should be analyzed as a regulatory taking. 56 In
Casitas, the government argued that it did not “seize,
appropriate, divert, or impound” any water, but
merely required water to be left in the stream. 57
Based on these concessions, and comparing the
Casitas taking with the facts in International Paper,
the Federal Circuit found that the government
54 Pet. App. 12a (internal quotations omitted).
55 Id.
56 Casitas, 543 F.3d at 1283.
57 Id. at 1290.
18
appropriated Casistas’s right to use its own water for
the government purpose of protecting an endangered
fish, stating that “[t]herefore, we conclude that the
government physically appropriated water that
Casitas held a usufructuary right in.” 58
The Casitas court acknowledged that the
government had not itself physically diverted the
water:
When the government forces Casitas to
divert water away from the RoblesCasitas Canal to the fish ladder for the
public purpose of protecting West Coast
Steelhead trout, this is a governmental
use of the water. The fact that the
government did not itself divert the water
is of no import. 59
The government’s actions in United Water and
Casitas both involved regulatory restrictions on the
water right holder’s use of water under the federal
Endangered Species Act, 60 by the National Marine
Fisheries Service (NMFS). In both cases, the
biological opinion required that both districts send
downriver water they otherwise would have diverted
and put to beneficial use, to protect an endangered
fish species—the Southern California steelhead trout
in United Water, and the West Coast steelhead trout
58 Id. at 1292.
59 Id. at 1292–93 (emphasis added).
60 See id. at 1282; see also Pet. App. 3a–4a.
19
in Casitas. 61
NMFS issued a biological opinion that required
United Water to increase water flowing through the
fish ladder that United Water was required to
construct. 62 United Water estimates that it lost, for
fish protection purposes, 49,800 acre-feet of water
that it otherwise would have diverted to the Freeman
Diversion Canal and put to beneficial use. 63
In Casitas, the court found that the government
appropriated an average of 3,200 acre-feet per year of
Casitas’ water for fish protection purposes. 64
The key difference between Casitas and this
case is that in Casitas, the Federal Circuit relied on
International Paper, Gerlach, and Dugan for
“guidance” finding that in each case, the government
required that the water be diverted or “caused water
to be diverted away[,]” 65 and that the government’s
actions were analyzed as a per se takings.
61 See Casitas, 543 F.3d at 1282; see also Pet. App. 3a–4a.
62 See Pet. App. 4a.
63 Id.
64 See Casitas, 543 F.3d at 1282, n.4.
65 See id. at 1290.
20
C.
The court below mistakenly concluded
that appropriative water rights under
California law do not vest as property
rights until the water has been diverted
Mistakenly relying on the law as it existed a
century ago, the court below erroneously asserted that
“water rights are acquired by diverting water and
applying it for a beneficial purpose.” 66 Applying this
erroneous legal principle to the facts of this case led
the court below to the wrong conclusion—that “the
appropriative-rights holder here needed to have
physically diverted water for its property right to vest
and thus become subject to a physical taking[.]” 67 But,
although “[p]rior to December 19, 1914, the effective
date of the Water Commission Act . . . such method for
appropriating water existed under California law and
could result in a vested appropriative right[,]” 68 that
has not been the law for more than a hundred years.
To the contrary, “under the law of California since
1913, a valid water right by appropriation can be
acquired only by filing an application with the state
authorities and pursuing it through the steps required
by law.” 69
66 Pet. App. 10a (internal quotations omitted).
67 Id. at 13a.
68 United States v. Fallbrook Pub. Util. Dist., 165 F. Supp. 806,
830 (S.D. Cal. 1958).
69 People of the State of California v. United States, 235 F.2d 647,
660 (9th Cir. 1956).
21
The statutorily required steps for obtaining a
water right permit from the State Water Board
include an application, notice to affected parties, and
a hearing before the Board. 70 If the Board determines
that unappropriated water is available, and the
application is for a beneficial use and in the public
interest, a permit is granted. 71 “The issuance of a
permit gives the right to take and use water only to
the extent and for the purpose allowed in the
permit.” 72
United Water’s State Water Resources Control
Board permit defines how much water it may divert
from the Santa Clara River; United’s actual
diversions from the River are irrelevant to defining its
state-granted water right. “Post-1914 appropriators
may possess water rights only through a permit or
license issued by the Board, and their rights are
circumscribed by the terms of the permit or license.” 73
California Water Code § 1225 provides: “[N]o right to
appropriate or use water subject to appropriation
shall be initiated or acquired except upon compliance
with the provisions of this division.” 74 California
courts have interpreted 1225 to declare that the
permit system—not actual appropriation—is “the
70 See Cal. Water Code §§ 1205, 1225.
71 See Cal. Water Code §§ 1201, 1240, 1253, 1257.
72 Cal. Water Code § 1381.
73 Millview Cnty. Water Dist. v. State Water Res. Control Bd., 229
Cal. App. 4th 879, 889 (2014).
74 Cal. Water Code § 1225.
22
exclusive means of acquiring the right to appropriate
or use water[.]” 75
Here, “United’s State Board-issued license and
permit provide it with the right to appropriate and
divert 144,630 acre-feet of Santa Clara River water
per year at the Diversion dam and to put that amount
of water to beneficial use.” 76 The permit precisely
defines the extent of United Water’s right to withdraw
water from the River—and so precisely defines United
Water’s property right. Whether a compensable Fifth
Amendment taking occurred is determined by the
extent to which Government action interfered with
that property right—the quantity of water it is legally
allowed to withdraw from the Santa Clara River. And
it is the Government’s interference with United
Water’s right to divert that quantity of water that
constitutes the taking.
Contrary to the court below, United Water was
not required to actually divert any water to create its
water right. Just the opposite—until United Water
received its permit it could not divert any water at all
from the Santa Clara. For, without a permit
authorizing the diversion, the diversion is
unauthorized and subject to enforcement pursuant to
Water Code sections 1052 and 1831. 77
Because actual diversion of water cannot occur
until after the State Board permit issues, authorizing
75 People v. Shirokow, 605 P.2d 859, 863 (Cal. 1980).
76 Pet. App. 4a.
77 See Cal. Water Code §§ 1052, 1831.
23
the diversion, the diversion plays no part in creating
or defining the water right—or United Water’s
property right. The court below’s reliance on this
irrelevant factoid to determine Fifth Amendment
liability rests on a glaring error of water law—leading
it to wrongly decide the case.
Although actual diversion may once have
created a California water right, this has not been
true for more than a century: Initially, rights to
appropriate water were acquired by actual diversion
and use of the water. 78 Beginning in 1914, however, a
statutory scheme has provided the exclusive method
of acquiring appropriation rights. 79
The issuance of a permit establishes an
appropriative right as of the date of the application
and grants the “right to take and use the amount of
water specified in the permit until the issuance of a
license . . . .” 80 The license is the last step in the
process which “confirms the right” established by the
permit. 81
78 See Shirokow, 605 P.2d at 865.
79 Id.
80 Cal. Water Code § 1455.
81 Cal. Water Code § 1610.
24
II.
The Rationale Behind Treating the
Taking of Water Rights as Per Se or
Physical Takings Is Consistent With the
Nature of the Water Right and the Court’s
Analysis of Other Discrete Interests in
Property Such as Trade Secrets and
Money
Courts have developed different taking rules
for different forms of property that involve discrete
interests in property or limited rights associated with
the property interest such as easements, leases,
contracts, trade secrets, pension plans, money,
interest earnings, causes of action, business interests,
and water rights. Courts have fashioned takings rules
to be sufficiently flexible so as to accommodate the
taking of the different rights associated with different
forms of properties. 82
The California water rights at issue in this case
are a unique type of property, consisting not of
ownership of the liquid itself, but rather merely of the
right to use the water for a particular purpose. As the
California Supreme Court explained nearly one
hundred and fifty years ago, “[i]t is laid down by our
law writers, that the right of property in water is
usufructuary, and consists not so much of the fluid
itself as the advantage of its use.” 83 From the earliest
82 See Argent v. United States, 124 F.3d 1277, 1283 (Fed. Cir.
1997) (“The Government ascribes to takings jurisprudence an
inflexibility that does not exist.”); see also Boise Cascade Corp. v.
United States, 296 F.3d 1339 (Fed. Cir. 2002) (en banc).
83 Eddy v. Simpson, 3 Cal. 249, 252 (Cal. 1853) (emphasis added).
25
days of its statehood, California has recognized that
an appropriative water right is a private property
right, subject to ownership and disposition by the
owner as in the case of other private property. 84 The
right to the use of water is “regarded and protected as
property” and is “substantive and valuable
property.” 85 As such, they cannot be infringed by
others or taken by governmental action without due
process and just compensation. 86
Regulatory taking rules make perfect sense
when applied to land, which has many sticks within
its bundle of rights. But water rights are diametrically
different from land, in that the sticks in its bundle of
rights are more limited; as a usufruct the rights
include a use right, and in some instances, the right
to divert or store the water for later beneficial use.
As this Court explained in Loretto v.
Teleprompter Manhattan CATV Corp., the taking
“chops through the bundle, taking a slice of every
Wells A. Hutchins, THE CALIFORNIA LAW OF WATER RIGHTS
120–121 (1956); see also id. at 37.
84
85 Id. at 121 (citing Kidd v. Laird, 15 Calif. 161, 179–180 (1860)
and McDonald v. Bear River & Auburn Water & Min. Co., 13
Calif. 220, 232 (1859)).
86 United States v. State Water Resources Control Bd., 182 Cal.
App.3d 82, 101 (1986) (citing Ivanhoe Irrigation Dist. v. All
Parties, 47 Cal. 2d 597, 623 (1957), rev’d. on other grounds in
Ivanhoe Irrigation Dist. v. McCracken, 357 U.S. 275 (1958), and
Gerlach, 339 U.S. 725, 752–754)).
26
strand” 87 and constitutes a per se violation of the Just
Compensation Clause. But with water, a taking slices
through a bundle of just one stick—the right to use
the water. In real property terms, when the
government takes a water right it absolutely
dispossesses the owner and renders the water right
estate valueless to the owner. 88
In Brown v. Legal Foundation of Washington, 89
a case involving the taking of interest on lawyers’
IOLTA accounts, the issue before the Court was
whether a per se or Penn Central analysis should be
used to analyze the regulatory requirement that
interest on lawyers’ trust accounts be transferred to a
public legal foundation. The government argued
there, as it does here, that no physical occupation had
occurred, and that therefore Penn Central analysis
was required. Rejecting the government’s argument,
the Court explained:
We agree that a per se approach is more
consistent with the reasoning in our
Phillips opinion than Penn Central’s ad
hoc analysis. As was made clear in
Phillips, the interest earned in the
IOLTA accounts “is the ‘private property’
of the owner of the principal.” 524 U.S.,
at 172. If this is so, the transfer of the
87 Loretto v. Teleprompter Manhattan CATV Corp., 458 U.S. 419,
435 (1982).
88 Allegretti & Co. v. Cnty. of Imperial, 138 Cal. App. 4th 1261,
1274 (2006).
89 Brown v. Legal Found. of Washington, 538 U.S. 216 (2003).
27
interest to the Foundation here seems
more akin to the occupation of a small
amount of rooftop space in Loretto. 90
In Ball v. United States, 91 the Court of Claims
summed up the rule on the taking of water rights: “In
general terms, water rights in surface waters,
whether riparian or appropriative, constitute
property, and, under familiar principles, cannot be
taken ‘except for the public use and upon payment of
just compensation.’” 92
As one commentator stated:
First, different kinds of property
interests, such as ownership in fee,
leaseholds, and easements, enjoy
different kinds of rights. Among these
different rights are some whose
importance is so central to the property
interest that the infringement of this
“core” right will likely result in a per se
90 Id. at 235; see also Hodel v. Irving, 481 U.S. 704, 716 (1987)
(regulation that “abolishes both descent and devise” of interests
in land is a per se taking); Ruckelshaus v. Monsanto Co., 467 U.S.
986 (1984) (taking of a trade secret is a per se taking); Louisville
Joint Stock Land Bank v. Radford, 295 U.S. 555, 596–602 (1935)
(taking of real estate lien analyzed as per se taking).
91 Ball v. United States, 1 Cl. Ct. 180 (1982).
92 Id. at 183 (quoting 2 NICHOLS ON EMINENT DOMAIN § 5.79 (3d
ed., rev. 1981)); see also Store Safe Redlands Associates v. United
States, 35 Fed. Cl. 726, 730 (1996) (concluding that the alleged
taking of plaintiff’s water rights “share[d] many commonalities
with the so-called physical taking”).
28
treatment of the taking, similar to a
physical or categorical taking.
***
This accepted recognition of core rights
with regard to property rights in land
justifies the same outcome with regard to
property rights in water. A water right,
like other property interests, enjoys
different rights and among these
different rights is the core right – the
right to use.
***
Thus, the right to use, the chief
characteristic of a water right,
necessarily includes the right to exclude
others from using the water, similar to a
landowner’s right to exclude others from
entering his property. 93
The rationale for applying a per se rule for
physical occupation of real property is that such action
often boils down to a fundamental notion of protecting
an individual’s right to exclude others. 94 In the
context of water rights, denying the water rights
owner the use of the water destroys the sole stick in
the bundle of property rights, and likewise destroys
93 Jesse
W. Barton, Tulare Lake Basin Water Storage Dist. v.
United States: Why It Was Correctly Decided and What This
Means for Water Rights, 25 ENVIRONS ENVTL. L. & POL’Y J. 109,
130–32 (2002).
94 Cedar Point Nursery v. Hassid, 594 U.S. 139, 149 (2021).
29
the water rights holder’s right to exclude others—
notably, the government—from using its water.
30
CONCLUSION
The Court should grant the petition for a writ
of certiorari.
Respectfully submitted,
NANCIE G. MARZULLA
MARZULLA LAW, LLC
1150 Connecticut Ave.,
NW
Suite 1050
Washington, DC 20036
(202) 822-6760
November 28, 2025
LAWRENCE S. EBNER
Counsel of Record
ATLANTIC LEGAL FOUNDATION
1701 Pennsylvania Ave., NW
Washington, DC 20006
(202) 729-6337
lawrence.ebner@atlanticlegal.org
Counsel for Amicus Curiae
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