Federal "Non-Reserved" Water Rights

Federal “Non-Reserved” Water Rights

[The follow ing m em orandum of law deals with the scope of the federal governm ent’s rights to
u nappropriated w ater flowing across federally ow ned lands in the western states It discusses the
background and developm ent of the federal “ non-reserved” water rights theory, and concludes
that that theory does not provide an appropriate legal basis for a broad assertion of water rights by
federal agencies w ithout regard to state laws. It then sets forth the legal standards and considera­
tions that are applicable to an analysis o f federal water rights in connection with the m anagem ent of
p articu lar federal lands under specific statutes authorizing federal land m anagem ent.]

TABLE OF CONTENTS

I. Introduction 329
II. Background 333
A. Development of “A ppropriative” Water Rights in the Western
States 334
B. Role of the Federal Government 338
(1) Federal ownership o f western lands 338
(2) Congressional recognition of state water law 341
(3) Judicial recognition of federal water rights 345
(a) Federal reserved rights 346
(b) Conflicts with congressional directives 351
(c) Administrative practice and interpretations 355
(i) Krulitz Opinion 356
(ii) Martz Opinion 360
(iii) Coldiron Opinion 360
III. Analysis 362
A. Constitutional Basis for Federal Claims 362
(1) Congressional authority to preempt state water laws 362
(2) “ Ownership” of unappropriated water 364
(3) Effect of Mining Acts of 1866 and 1870 and Desert Land Act 367
B. Statutory Basis for Federal Claims 370
IV. Conclusion 383

328
 June 16, 1982

MEMORANDUM FOR THE ASSISTANT ATTORNEY GENERAL,
LAND AND NATURAL RESOURCES DIVISION

I. Introduction

You have asked us for our analysis and legal opinion concerning the federal
government’s legal rights to unappropriated water arising on or flowing across
federally owned lands in the western states. Specifically, you have asked us to
consider whether the federal government can assert rights to unappropriated
water, without regard to state laws governing the use of such water, under what
has come to be known as the federal “ non-reserved” water rights theory. For the
reasons set forth in detail in this opinion, we conclude that the federal non-
reserved water rights theory which we address in this opinion does not provide an
appropriate legal basis for assertion of water rights by federal agencies in the
western states.
The question presented to us arose in your Division in pending litigation in
Wyoming State court involving, inter alia, rights of the United States Depart­
ment of Agriculture, through the Forest Service, to water in the Big Horn and
Shoshone National Forests. The question presented to us initially was whether an
appropriate legal basis exists for the Forest Service to assert amended claims in
that litigation based on the federal non-reserved water rights theory. At that time
the Forest Service supported assertion of such claims, at least for the purposes of
the Wyoming litigation. The Department of Agriculture has since changed its
position and decided as a matter of policy that it will not assert claims based on
the non-reserved water rights theory, but rather will rely on state law to obtain
water rights, except where Congress has specifically established a water right or
where a federal reserved right exists. See Letter from John B. Crowell, Jr.,
Assistant Secretary for Natural Resources and Environment, Department of
Agriculture, to the Honorable David H. Leroy, Attorney General, State of Idaho
(Feb. 5, 1982).
While the question of the validity of the federal non-reserved water rights
theory arose in the relatively narrow context of the Wyoming litigation, it is a

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question that has created considerable uncertainty for you and your client
agencies (the Departments of the Interior, Agriculture, and Defense), and for the
western states. It is no exaggeration to say that water is the single most vital
resource in the western states. The importance of the availability of water for
management of federal lands in the western states and concern at the state level
with allocation of dwindling water resources have led in the past to conflicts
within the Executive Branch and intense controversy with the western states over
the basis and scope of the federal government’s right to use unappropriated water
arising on or flowing across federal lands. Previous Executive Branch positions
relative to federal government claims to water in the western states have been
inconsistent and have produced confusion, turmoil, and significant hostility
toward the federal government.1 The need to establish clear, dependable, reli­
able, and sound legal policies and to avoid conflicts and uncertainty in the
western states to the extent possible, and to facilitate future planning for the use of
water resources by both the western states and the responsible federal agencies
has led you to ask this Office to address the matter more broadly.
We address here only the legal issues raised by the federal non-reserved water
rights theory. Some uncertainty may persist as to how the legal principles we
outline here should be applied to specific factual situations. Policy considerations
will also continue to be important, for example, in the determinations by federal
agencies relative to the breadth of permissible rights which they wish to assert or
in the choice of procedures and forums in which to adjudicate federal water
rights, and quantification of current and future water rights may have to await
comprehensive adjudications in each state. However, because much of the
uncertainty has been created by contradictory analyses of the legal basis of the
federal non-reserved right theory, a comprehensive resolution of the legal issues
involved will go far toward reducing the uncertainty and therefore the tensions
among the various federal agencies and between the Executive Branch and the
western states.
At the outset, it is important to understand what we address in this opinion.
First, we are concerned here only with the federal government’s right to use
unappropriated water— i.e., water that is not subject to any vested right of
ownership under applicable state or federal law at the time the federal right
accrues. We do not deal here with the scope of the federal government’s right to
acquire, by purchase or condemnation, existing vested (“ appropriated” ) water
rights held by private individuals or by the states. Second, the question we
address is not simply whether a federal non-reserved right exists in the abstract.
The federal government can, and does, acquire rights to use unappropriated water
on federal lands by complying with state procedural and substantive laws. In

1 The Attorney General for the State of W yoming has stated, for example, that “ the non-reserved right doctrine
creates a nightmare for Western States water resources m anagem ent” Letter from the Honorable Steven F.
Freudenthal, Attorney General, State of W yoming, lo Theodore B. Olson, Assistant Attorney General, Office of
Legal Counsel (Apr. 1, 1982) The Montana Attorney General has suggested that failure to resolve the non-reserved
water nghts dispute would lead to “ a long and acrimonious confrontation between the federal and state govern­
ments ” Memorandum from the Honorable M ike Greely, Attorney General, State of Montana, to Theodore B
O lson, Assistant Attorney G eneral, Office of Legal Counsel (Apr 1, 1982) at 12.

330
addition, the Supreme Court has recognized federal “ reserved” water rights—
i.e., when the federal government, acting pursuant to congressional authoriza­
tion, reserves or withdraws public land for a specific federal purpose, such as a
national forest, it also reserves sufficient water to accomplish that purpose,
regardless of limitations that might otherwise be imposed on the use of that water
under applicable state law. See Part IlB(3)(a) infra. In its broadest formulation, a
federal non-reserved water right might include any use by the federal government
of unappropriated water that is recognized neither under applicable state law nor
under the reserved right doctrine. Defined this broadly, federal non-reserved
water rights would include even uses of water that have been explicitly authorized
by Congress, but that may not be recognized by state law, such as preservation of
a minimum instream flow in a particular river,2 or diversion of a stream and
construction of a dam for flood control, improvement of navigation, or produc­
tion of hydroelectric power.3 Although Congress has rarely been explicit in
directing the use or disposition of water by federal agencies, there is no question
that, by operation of the Supremacy Clause, such a specific directive preempts
inconsistent state laws. See discussion in Part IIIA(l) infra. As we discuss below,
a legal basis may therefore exist under particular federal statutes for assertion of
federal water rights that do not fall into the category of either reserved or state-
recognized rights, and that might conceivably be classified as “ non-reserved”
water rights simply because they do not stem from the reserved doctrine.
This is not to say, however, that an appropriate legal basis exists for the federal
non-reserved water rights theory, as it has been articulated by, among others,
former Solicitor Leo Krulitz of the Department of the Interior. It is this theory that
we address here. In his June 25, 1979, opinion on the legal bases for acquisition
of water rights by the Department of the Interior, Solicitor Krulitz concluded that,
in the absence of an explicit congressional directive to the contrary, a federal
agency may claim and use whatever unappropriated water is necessary to carry
out congressionally authorized “ management programs” for federal lands, with­
out regard to state law. See Part IIB(3)(c)(i) infra. Solicitor Krulitz’s theory of
federal non-reserved water rights rested on the presumption that the federal
government need not comply with state water law in its acquisition and use of
water for federal purposes on federal lands— a presumption that could be rebutted
only by an explicit statutory directive that the federal agency responsible for
management of the federal lands in question abide by state law in the use,
appropriation, or distribution of water on those lands. Thus, under this theory, in
the absence of such a directive a federal agency may use whatever unappropriated
water is necessary to carry out its land management functions without regard to
state law.4

2 See, e.g.. 16 U S.C. § 577b (1976) (prohibiting any “ further alteration of the natural water level of any lake or
stream” in the Lake Superior National Forest).
3 See, e g., Oklahoma v. Guy F Atkinson Co , 313 U.S. 508, 535 (1941), First Iowa Coop, v Federal Power
Comm’n, 318 U .S. 152, 176 (1946), discussed in Part IIB(3)(b) infra
4 As we discuss in Part IIB(3)(c)(i) infra. Solicitor Krulitz concluded that federal agencies are immune from both
substantive and procedural state law, but recommended as a matter of policy that the agencies comply with state
procedures wherever possible

331
 We conclude that the broad federal non-reserved water rights theory asserted
by Solicitor Krulitz is not supported by an analysis of the applicable statutes and
judicial decisions. As we discuss below, to the extent Solicitor Krulitz relies on
federal ownership of unappropriated water in the western states as a basis for
federal rights to water, that reliance is misplaced. More importantly, when the
question is considered as one of competing state and federal regulatory jurisdic­
tion, rather than ownership of the water—as we believe it must— Solicitor
Krulitz’s opinion fails to give adequate consideration to the pattern of con­
gressional deference to state water law, which the Supreme Court has recognized
as critical in analyzing federal rights to water on federal lands. See California v.
United States, 438 U.S. 645, 648—63 (1978); United States v. New Mexico, 438
U.S. 696, 701-02 (1978).
We believe that the history of federal-state relations with respect to water rights
in the western states and Congress’ weighing of the competing federal and state
interests establish a presumption that is directly opposite to that asserted by
Solicitor Krulitz: in the absence of evidence of specific congressional intent to
preempt state water laws, the presumption is that federal agencies can acquire
water rights only in accordance with state law. The mere assignment of land
management functions to a federal agency, without more, does not create any
federal rights to unappropriated water necessary to carry out those functions.
It is important to keep in mind, however, that this presumption is rebuttable.
There is no question that the federal government has the constitutional authority
to acquire rights to whatever water is necessary to manage federal lands, either
through purchase or condemnation of existing water rights or by clear con­
gressional action. The critical question is what evidence of congressional intent is
necessary to rebut the inference that state law is controlling. The Supreme Court
has addressed that question in its recent decisions in California v. United States
and United States v. New Mexico, albeit in limited contexts. We believe that the
Court’s reasoning in those two cases provides the relevant framework for analysis
here. Read together, those cases suggest that congressional intent to preempt state
control over unappropriated water in the western states will be found only if
conditions imposed under state law on the use or disposition of water by a federal
agency conflict with specific statutory directives authorizing a federal project or
directing the use of federal lands, or if application of state law would prevent the
federal agency from accomplishing specific purposes mandated by Congress for
the federal lands in question. The scope of the federal rights that may be asserted
under those circumstances is limited to water minimally necessary to carry out
the relevant statutory directives or purposes.
Although we believe that the water rights that can be asserted by federal
agencies without regard to state law are far more limited than those available
under Solicitor Krulitz’s non-reserved water rights theory, we do not believe it is
appropriate to reach a blanket conclusion that under existing federal statutes no
implied federal water rights exist except for reserved rights. The reasoning used
by the Supreme Court to support federal reserved rights does not depend solely
on a formal reservation of land from the public domain, but rather on Congress’

332
exercise of a constitutional authority such as the Property or Commerce Clauses,
coupled with the Supremacy Clause. Therefore, that reasoning is applicable even
if there has been no such reservation. We believe, for example, that the Court’s
decision in United States v. New Mexico is equally applicable to water necessary
to fulfill the primary purposes of a federal statutory scheme where the lands in
question have been acquired by the federal government from private ownership,
rather than reserved from the public domain, and dedicated to particular federal
purposes, such as a national forest, park, or military base. See Part IIIB infra. We
also believe that it is open to federal agencies to argue that Congress has
established particular mandatory purposes for the management of public domain
lands that would be frustrated by the application of state water law, although, as
we discuss below, the primary federal statutes authorizing management of the
public domain appear to provide little basis for that argument. The New Mexico
decision leaves virtually no room for arguing, however, that federal agencies can
appropriate water without regard to state law if that water is necessary only to
carry out a “ secondary use” of federal lands, in the terminology of the Court in
New Mexico —i.e ., an incidental or ancillary use that is permitted by Congress,
but not within the primary purposes mandated by Congress for the federal lands
in question.
The scope of the federal government’s rights to unappropriated water for use in
the management of specific federal lands in the western states, whether charac­
terized as “ reserved” or “ non-reserved,” can be definitively determined only by
a careful examination of the individual federal statutes that authorize manage­
ment of those lands and their legislative history, and of the potential conflicts that
may be created by application of state laws. We cannot undertake that analysis
here with respect to all federal statutes governing the use of federal lands, but
must leave that task, at least initially, to the individual agencies responsible for
administration of those statutes. We outline in this opinion, to the extent possible,
the legal standards and considerations that are applicable to that analysis, and the
bases for our conclusions.

II. Background

The rights of the federal government to use water in the western states cannot
be analyzed solely as a question of abstract constitutional or statutory interpreta­
tion. See California v. United States, supra, 438 U.S. at 648. The unique
geography, history, and climate of the western states and the ownership by the
federal government of substantial land within those states have shaped many of
the relevant questions and conclusions. In order to analyze the scope of the
federal government’s rights to unappropriated water in the western states, it is
therefore necessary to look in some detail at the development of western water
law and the role played by the federal government in managing and disposing of
the western public lands.

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A . D evelopm en t c f “A p p ropriative” Water R ights in the Western States
Because of different climatic, topographic and geographic conditions and the
differing demands of agricultural and economic development, the arid and semi-
arid western states have developed legal doctrines and administrative machinery
governing water rights that bear little resemblance to those developed in the
humid eastern states.5 Most o f the eastern states have adopted, with some
variations and modifications, the common law riparian theory of water rights. In
general, under a riparian theory, the right to use water goes with ownership of
land abutting a stream. Each owner of land on a stream has the right to make
reasonable use of the water, but cannot interfere unreasonably with the right of a
downstream owner to the continued flow of the stream. For example, if the
riparian owner diverts the water, he must return it to its natural channel, un­
diminished except for reasonable consumptive uses. See 1 R. Clark, Waters and
Water Rights, §§ 4.3, 16.1 (1967) (hereinafter cited as Clark); F. Trelease, Water
Law, at 10—11 (3d ed. 1979). Similarly, a landowner in a riparian state generally
has the right to make reasonable use of ground water arising on his land, but not to
make unreasonable withdrawals of that water if it comes from a pool common to
other landowners. Id. A landowner’s riparian rights exist whether or not he
actually takes steps to use the water, and the use may be initiated at any time. See
id. at 1 1.
The riparian doctrine has for the most part been adequate to allocate water
rights in the eastern states, where water is generally abundant and water problems
most often involve flooding, drainage, pollution, or navigation.6 As the arid and
semi-arid western states were settled, however, the riparian system proved to be
inadequate to meet the needs of the early settlers, particularly the miners and,
later, the farmers.7 The major problem faced by early settlers in those states was a
shortage of water. The two primary occupations, mining and agriculture, re­
quired large consumptive uses o f water, which could be accomplished only by
construction of systems to divert and store available stream and ground waters.
Tying water rights to the ownership of adjacent land, and thereby retarding or
5 Land is generally considered arid or sem i-and if 11 cannot be cultivated without irrigation. See Note, Federal-
State Conflicts Over the Control c f Western Waters, 60C olum . L. Rev. 967 n 2 (1960) (hereinafter cited as Colum
Note) Seventeen western states are usually included in this category. Arizona, California, Colorado, Idaho,
Kansas, M ontana, N ebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, South Dakota, Texas,
U tah, W ashington, and W yoming. These states, where water is relatively scarce, have developed systems of legal
rights to water based on the doctrine of “appropriation” or capture of the water for a productive use See discussion
at pp 8-11 infra. The remaining 31 contiguous states have adopted some form of a riparian system for the allocation
of water rights, based on ownership of land S e e discussion at pp 7 -8 infra. Alaska appears to have largely rejected a
riparian doctrine in favor of an appropriative system, while Hawaii has a mixed system based on custom, ancient
n ghts, and legislation See 1 Clark, supra. § 4 4
6 Although most of the states outside of the seventeen arid or semi-and western states still adhere to riparian
rights, in many of those states the common law has been codified or preempted by statutes governing specific uses
such as construction of dams and use of water by cities, districts and state agencies, or preserving public uses such as
minimum flows or, more recently, aesthetic and environmental values See F. Trelease, Water Law, supra, at 12.
Some riparian states now require administrative permits prior to the initiation of new water uses. Id; see also
F Trelease, “ Federal-State Relations in W ater Law” (Legal Study No 5, prepared for the National Water
Commission) at 15-18 (Sept 7, 1971) (hereinafter cited as “ Federal-State Relations” ).
7 A riparian system was particularly ill-suited for use by the first wave of miners, who staked their claims at a time
when most of the western lands were still owned largely by the federal government and not legally open for
settlement Thus, for the most part there was no private ownership of land to which npanan rights could attach. See
C olum. Note, supra n 5, at 969

334
precluding the diversion of waters from their normal channels, would have
entirely frustrated development of the west. See, e.g ., California Oregon Power
Co. v. Beaver Portland Cement Co., 295 U.S. 142, 157 (1935). Accordingly,
based largely on customs of the early miners, the western states developed what
has come to be known as the “ law of the first taker,” or the “ appropriative”
system. Under an appropriative system, unlike under a riparian system, the right
to use water does not depend on ownership of underlying or appurtenant lands.
Rather, the right depends on capture or “ appropriation” of the water for a
particular use. The first person to put water to use is entitled to that water as long
as the use continues, to the exclusion of subsequent users. The principle of “ first-
in-time-first-in-right” embodied in this customary system was quickly confirmed
by the state courts,8and refined and codified by state statute.9 Most of the western
states have now adopted comprehensive water codes based primarily on appropri­
ation, which provide for recognition, administration, and enforcement of water
rights and, in several of those states, for large-scale planning of water resource
use.10
Although statutory and case law differ in many respects among the western
states, there are several common principles that distinguish the appropriative
systems from riparian systems. See generally Trelease, “ Federal-State Rela­
tions,” supra n.6, at 29-33; 1 Clark, supra, § 4.
First, the right is based on the beneficial use of water, rather than on ownership
of appurtenant land. Unless there has been an actual application of water to a
beneficial use, there has been no valid appropriation. The beneficial use is also
the measure of the right; an appropriator is entitled to only that quantity of water
beneficially used in any given year upon particular land. See 5 Clark, supra,
§ 408.1. Uses considered “ beneficial” vary from state to state. Recognizing that
the term must be applied pragmatically, the states have generally considered
beneficial uses to include a variety of productive uses such as mining, irrigation,
domestic and municipal uses, industry, power production, stock watering, and,
more recently, wildlife preservation and recreation." See id. Some states have
8 See. e g., Irwin v Phillips, 5 Cal. P. 140, 63 Am Dec 113 (1855), Lux v. Haggin, 69 Cal. 255, 10 P. 674
(1886), Coffin v Lefthand Ditch Co., 6 Colo. 443 (1882).
9 See. e.g , Cal Civ. Code. lit. 8. pt 4 .d iv 2, §§ 1410-22 (1872), Colo Laws 1862. ch. 28. § 13, Colo Laws
1864. § 32, Mont Laws 1865, p 30, §§ 1-2 Bannack Slats 367; §§ 69-70 Mont. Sess Laws 57; Laws of Dec. 9,
1850, Laws of Utah (1866) ch. U 0 - U 1, Law of Feb. 18, 1852, Laws of Utah (1866). ch 117; Law of Jan. 17,1862,
Laws of Utah (1866) ch. 119. Hills Laws Ann (Oregon) § 3832 (1864); Howell Code (Arizona) §§ 1 ,3 (1864)
10 Fora general description of state water laws, see R Dewsnup& D Jensen, A Summary-Digest of State Water
Laws (1973) (study prepared for the National Water Commission) and 3 W Hutchins. Water Rights Laws in the
Nineteen Western States (U S. Dept, of Agriculture Misc Pub. No. 1206, 1971) Nine of the western states, most
notably California, have in the past recognized some limited forms of riparian nghts on private lands, in addition to
appropriative rights. See I Clark, supra, § 18 2(B). By statute or constitutional amendment those states have largely
eliminated or severely circumscribed reliance on riparian ownership, and consequently riparian rights now have, for
the most part, only historic significance See 5 Clark, supra, § 420 The only states in which new uses may be
initiated by exercising a riparian right are California and, to a limited extent, Nebraska. See F. Trelease, Water Law,
supra, at 11-12
11 The Montana and Washington water codes contain examples of broad definitions of beneficial use.
“ Beneficial use” . . means a use of water for the benefit of the appropnator, other persons, or the
public, including but not limited to. agricultural (including stock water), domestic, fish and wildlife,
industrial, irrigation, mining, municipal, power and recreational uses.
Mont Rev Code 1979 § 85-2-102(2)
Uses of water for domestic stock watering, industrial, commercial, agricultural, irrigation, hydro-
C ontinued

335
established statutory preferences to be given effect if there are competing
applications for new uses that exceed the available unappropriated water supply.
These preferences do not generally affect past or existing uses.12
Second, the water must be “ appropriated,” or reduced to possession. As a
general rule, appropriation may be accomplished only by a physical diversion of
a stream or capture of ground water. Although some states recognize exceptions
for uses such as stock watering and irrigation by natural overflow, uses of a whole
stream or lake, without diversion, for purposes such as maintenance of minimum
instream flows to preserve fish and wildlife or for recreation are often not
recognized. See 5 Clark, supra, § 409.2. A few states allow instream uses on a
discretionary basis13 or provide that state agencies may make appropriations of
minimum instream flows for recreational, wildlife, or other purposes.14
Third, when there is insufficient water to meet the needs of all appropriators,
priority among appropriators is established chronologically, based on the time
the various appropriators first put the water to use, rather than based on any
proration that takes account of the utility of the competing uses. The priority date
gives an appropriative water right its primary value, because it guarantees that a
senior (in time) appropriator will receive the entire quantity of water to which he
is entitled prior to delivery of any water to a more junior appropriator. Originally,
priority dates were established on the basis of when the water was actually put to
use. Most western states, however, have enacted statutes requiring noticing or
filing of applications for new water uses. In many western states, that statutory
procedure is the exclusive means for acquiring water rights. In these so-called
“ permit states,” priority dates are normally fixed by the date of application for
the water right rather than the date of actual use. See 5 Clark, supra, at § 410.1.
In permit states, it is possible that an appropriator who fails to make the filings or
applications required by state law but actually puts the water to use may find his
rights cut off by a more junior appropriator who makes a timely filing.15
Fourth, an appropriation of water is a transferable right of permanent, or at
least indefinite duration, provided the use is continued. It may be sold or
transferred with the land or separately. Changes in the location or nature of the
use (but generally not the quantity) may be permitted, provided they do not injure
the rights of other appropriators, but in most cases must be approved in advance

electric power production, mining, fish and wildlife maintenance and enhancement, recreational,
and thermal power production purposes, and preservation o f environmental and aesthetic values, and
all other uses compatible with the enjoyment of the public waters of the state, are declared to be
beneficial
Wash. Rev Code Ann § 90 54.020
12 See, e g., Ariz. Rev. Stat. Ann § 45-147B (West Supp.) (relative values are (1) domestic and municipal, (2)
irrigation and stock watering; (3) power and mining, and (4) recreation and wildlife, including fish); Wyo. Slat.
§ 4 1 -3 -1 0 2 (1977); 5 Clark, supra, §§ 40 8 .1 , 408.4
13 See. e.g . W yo. Stat. § 4 1 -3-306 (1977) (State Engineer can make allowances for instream stock watering,
without recognizing a right to such use).
14 See, e .g .. Colo Rev. Stat § 37-92-102(3), 37-92-103(3) (4) & (10) (1973) (state agency may make
appropriations of minimum instream Hows).
15 Particularly where water rights may antedate water codes or adjudication statutes, rights in those states may in
some cases be awarded priority by equity decrees or other adjudicative procedures, despite a failure to make the
requisite filing See 5 C lark, supra. § 410.1.

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by the state. See 5 Clark, supra, at § 412; Trelease, “ Federal-State Relations,”
supra n.6, at 33.
All the western states have developed administrative or judicial systems to
recognize, administer and enforce water rights. In most of these states, new
appropriations must be approved by a state administrator (often known as the
State Engineer) who has the authority, inter alia, todetermine ifthere is sufficient
unappropriated water available, if the proposed use is beneficial and, in some
states, if the use is in the public interest. See Trelease, “ Federal-State Relations,”
supra n.6 at 135-36; 1 Clark, supra, §§ 20-21. Judicial review of administrative
determinations, and adjudication of competing rights are available in each state",
often in special courts or under special procedures applicable only to water
rights. Id. The western states do not generally provide any explicit exemption
from their substantive or procedural requirements for the federal government or
give any special recognition to uses of water by the federal government that may
have no private counterpart, such as minimum instream flows necessary to
sustain wildlife and fish or to provide recreational opportunities.16
In addition to statutes providing for the appropriation of water and enforcement
of water rights, most of the western states have asserted, by statutory or constitu­
tional provision, some form of “ title” to or “ ownership” of waters by the state or
the people of the state.17 Many of those states also recognize, however, that the
federal government may have reserved some “ proprietary” interests in unap­
propriated water appurtenant to federal lands at the time the states were admitted
into the Union. In the so-called “ California doctrine” and “ Oregon doctrine”
states,18 the state courts have held that the federal government had an original
property right to all non-navigable waters on the territories that formed those
states, a right it did not pass to the states at the time of their admission. Those
states, however, by virtue of their sovereignty over lands within their borders, can
nonetheless determine rights that appertain to federal as well as private
ownership of property, such as the use of water, subject to the ultimate authority
of the federal government to determine such rights on federally owned lands.19In

16 Some states have, however, recognized that state agencies may have particular interests and rights not available
to private parties See nn 13, 14 supra
17 See. e g . Colo Const art. XVI, § 5 ( “ The water of every natural stream, not heretofore appropriated, within
the state o f Colorado, is hereby declared to be ihe property of the public, and the same is dedicated to the use of the
people o f the state, subject to appropriation as hereinafter provided” ), Wyo Const art. VIII, § 1 ( “ The water of all
natural streams, springs, lakes or other collections of still water, within the boundaries of the state, are hereby
declared to be the property of the state” ), N.D Const, art XVII, § 210 States such as California, Nevada and
Oregon have provided by statute that all water within the state “ is the property of” or “ belongs to” the public or the
people of the state. See Cal W aterCode§ 102,Nev Rev Stat § 533 0 2 5 (1 979);0re Rev Stat.§ 537 110(1963).
See generally E M orreale, Federal-State Conflicts over Western Waters—A Decade c f Attempted "Clarifying
L e g i s l a t i o n 20 Rutgers L Rev. 423, 446-59 (1966) (hereinafter cited as Federal-State Conflicts)
18 The “ California doctnne” states are California, Kansas, Nebraska, North Dakota, Oklahoma, Texas and
Washington The “ Oregon doctnne” is followed in Oregon and South Dakota See Colum. Note, supra n.5, at
972-75; Note, Federal Nonreserved Water Rights, 48 U Chi L Rev. 758, 766 n.46 (1980); 2 Clark, supra.
§ 102 3.
19 The “ Oregon doctnne” differs from the “ California doctrine" in that it construes the Desert Land Act as
establishing a uniform rule of appropriation applicable to private and federal rights The “ California doctnne” holds
that the Desert Land Act, together with the Mining Acts of 1866 and 1870 (discussed at pp 18-24, infra) merely
recognized and affirmed whatever state system had been developed for allocation of water nghts, including systems
such as California’s that recognized some riparian nghts SeeColum Note,supra, n 5, at 972-75; 2 Clark, supra,
§ 102.3.

337
the “ Colorado doctrine” states, by contrast, the courts have held that the United
States never acquired any proprietary interest in waters in those states, and
therefore that the transfer of sovereignty to such states with their admission
simultaneously transferred full power to control the disposition and use of those
waters.20
B. Role c f the Federal Government
The most significant role that the federal government has played in the
development of water law in the western states has been that of owner of vast
public lands within those states. As we discuss below, the federal government has
largely acquiesced in or fostered the development of comprehensive state control
over water in the western states, even with respect to water flowing over or arising
on federally owned lands. With rare exceptions, Congress has not directly
regulated the acquisition or use of water flowing over or arising on federal lands in
the western states. The federal laws that have the greatest impact on state interests
and state regulation of water rights are directions or authorizations to government
agencies to construct projects, administer programs, manage property, and use
water on federal lands. To the extent that a “ federal” law of water rights exists—
i.e ., rights that can be asserted under federal statutes without regard to state
law— it arises primarily because programs or projects on federal lands operated
by federal agencies require the use of water, rather than because federal regulation
of the uses of water overlaps with state regulation. As one commentator has
noted:
Most conflicts [between federal and state agencies] have come not
from direct clashes between inconsistent laws applicable to the
same subject of regulation, but from federal uses or operations
which in particular applications do not mesh with state laws or
private rights. [For example a] federal project may be illegal, or at
least unauthorized, under state water law. A private use under state
law may interfere with a federal use of water or of land. A federal
use may destroy a state use. A federal program may encourage
uses not provided for by state law.
Trelease, “ Federal-State Relations,” supra n.6, at 56-57. Therefore, Congress’
policies towards the settlement, disposition, and management of federal lands in
the western states provide the context for our consideration of the scope of federal
water rights in those states.
1. Federal ownership of western lands
The federal government was the original owner of substantially all the land that
comprised the western territories.21 The acts of admission of the western states,
20 The “ Colorado doctrine” states are A rizona, Colorado, Idaho, Montana, Nevada, New Mexico, Utah, and
W yom ing 2 Clark, supra, § 102.3(C) n 21 F o r a full discussion of the origins and holdings of the California,
O regon, and C olorado doctrines, see 5 Clark, supra. §§ 401, 405, 420; Colum Note, supra n.5, at 972-75
21 Title to most of the western territories was obtained by the United States from foreign powers through purchase
and treaty du n n g the first half of the 19th century Generally, the terms of acquisition provided for recognition of the
few existing private property nghts, but granted title over the vast non-pnvate lands lo the United States Texas was
an exception, it was admitted by annexation in 1845, and retained title to all its public lands. See Morreale, Federal-
State Conflicts, supra n 17, at 431 & n 41; C olum Note, supra n 5, at 968-69 & nn. 8, 9.

338
which guaranteed each state “ equal footing with the original States in all respects
whatever” (see, e .g ., 9 Stat. 452 (1850)), reserved to the federal government
ownership of unappropriated lands within the state, but made no provision with
respect to unappropriated waters. See, e.g ., California v. United States, supra,
438 U.S. at 654. Much of the land originally owned by the federal government
has been sold or disposed of under the terms of the federal public land laws,22 but
the federal government still holds title to substantial acreage in the West.23
The lands owned by the federal government are generally classified as either
“ public domain” or “ reserved” lands. The public domain includes lands that are
open to settlement, public sale, or other disposition under the federal public land
laws, and not exclusively dedicated to any specific governmental or public
purpose. See, e .g ., Federal Power Commission v. Oregon, 349 U.S. 435,
443—44 (1955); United States v. Minnesota, 270 U.S. 181, 206 (1926). Public
domain lands are for the most part managed by the Department of the Interior,
through its Bureau of Land Management (BLM).24 Reserved lands are lands that
have been expressly withdrawn from the public domain by statute, executive
order, or treaty, and dedicated to a specific federal purpose. Federal statutes
authorize reservation of public domain land for a variety of purposes, such as
national parks and monuments,25 national forests, refuges and wilderness areas,26
reclamation projects,27 hydroelectric dams,28 and military facilities.29 Other
withdrawals have been made by executive order, pursuant to the general authority
of the Executive Branch to manage and administer federal lands, subject to
congressional authorization or assent. See United States v. Midwest O il C o ., 236

22 The term “ public land laws” is generally used to refer to statutes providing for the sale or disposition of public
lands, such as the Homestead Act. 12 Stat. 392 (1862), 43 U S.C § 161 (1970), and the Desert Land Act of 1877,
19 Slat 377, 43 U.S C § 321 et seq., which provided for land grants to settlers of western lands, and various
statutes providing for the sale or grant of public lands to private individuals or the states under conditions set by
Congress See. e.g., Act of Aug 18, 1894, 28 Stat. 422. 43 U .S.C § 641 (1976). Public Lands Act of 1964, Pub.
L No 88-606, 78 Slat 982, 43 U.S C. § 1391 et seq (1970) The sale and disposition of public lands are now
governed pnm anly by the Federal Land Policy and Management Act of 1976. Pub L No. 94-579, 90 Stat 2743,
43 U S C § 1701 etse q . Public land laws are usually distinguished from mining laws, which govern the mining of
hard minerals on public lands, and mineral leasing laws, which provide for leasing of public lands for gas and oil.
See generally 63 Am Jur. 2d “ Public Lands,” § 2
23 In 1978 the Supreme Court recited that the percentage of federally owned land in the western states, excluding
Indian reservations and trust properties, ranged from 29.5 percent of the land in the State of Washington to 86 5
percent of the land m the State of Nevada, with an average of approximately 46 percent See United States v New
Mexico, supra. 438 U.S at 699 n 3 (1978)
24 The two major statutes authorizing management of the public domain by the BLM are the Taylor Grazing Act,
48Stat 1269 (1934), asamended, 43 U.S C. § 315 etseq.. which authorizes the Secretary of the Interior to manage
the public domain for grazing purposes, and the Federal Land Policy and Management Act, supra n 22, which
directs the Secretary of the Interior to manage the public domain on the basis of “ multiple uses'* and for “ sustained
yield ” See 43 U S C § 1702(c), (h)
25 See, e g.. National F^rk Service Act of 1916, 39 Stat 535, as amended, 16 U.S C § 1 et seq., American
Antiquities Preservation Act of 1906, 34 Stat 225, 16 U S C § 431 (1976)
26 See, e g , Forest Service Creative Act o f 1891, 26 Stat. 1103, 16 U S.C. § 471 (1976), Forest Service Organic
Administration Act of 1897, 30 Stat 34, 36, as amended, 16 U .S.C. § 473 (1976), National Wildlife Refuge
Administration Act of 1966, Pub. L No 89-669, 80Stat 9 2 7 . 1 6 U S C § 668dd (1976), Wild and Scenic Rivers
Act, Pub. L No 90-542, 82 Stat. 906 (1968), 16 U.S C. § 1271 et seq., Wilderness Act of 1964, Pub. L No.
88-577, 78 Stat 890, 16 U S C. § 1131 et seq. (1976).
21 See Reclamation Act o f 1902. 32 Stat 390. as amended. 43 U .S.C . § 371 et seq. (1976).
28 See Federal Power Act. 41 Stat 1075 (1920), as amended. 16 U .S.C . § 818 (1976).
29 See State c f Nevada ex rel. Shamberger v. United States, 165 F. Supp. 600 (D Nev 1958), rev d o n sovereign
immunity grounds. 279 F.2d 699 (9lh Cir 1960), Act of Feb. 28, 1958, Pub L No 85-337, 72 Stat 2 7 ,4 3 U .S .C
§ 155 (withdrawal, reservation or restriction of public lands for defense purposes)

339
U.S. 459, 474 (1915). As a general rule, land that has been withdrawn from the
public domain is no longer subject to laws governing the disposition or sale of
public lands. See, e .g .. United States v. Minnesota, supra, 270 U.S. at 206.
The terms “ public domain” and “ reserved lands” are most often used to refer
to land that has been owned continuously by the federal government. There is a
third category of federally owned land that includes lands acquired by the federal
governm ent from private ownership by purchase, exchange, gift, or con­
demnation pursuant to statutory authorization. See, e .g ., 43 U.S.C. § 315g(c) &
(d) (grazing lands); 16 U.S.C. § 515 e tse q . (1976) (national forest lands). These
“ acquired” lands may become part of the public domain, or may be set aside for
specific federal purposes in the same manner as reserved lands. When acquired
lands are set aside, they are not characterized as reserved lands, because they
were not, strictly speaking, reserved from existing public domain lands. They are
nonetheless usually managed under the same statutory authority and for the same
purposes as reserved lands,30 and therefore for most purposes can be considered
as part of a federal reservation. See Rawson v. United States, 225 F.2d 855, 856
(9th Cir. 1955), cert, denied, 350 U.S. 934 (1956) (“ It may be stated as a
universal proposition that patented lands reacquired by the United States are not
by mere force of the reacquisition restored to the public domain. Absent legis­
lative or authoritative directions to the contrary, they remain in the class of lands
acquired for special uses, such as parks, national monuments, and the
like . . . .” ); Thompson v. United States, 308 F.2d 628, 632 (9th Cir. 1962).
Until the end of the 19th century, federal policy emphasized and encouraged
settlement and transfer of the public lands to private ownership. See Comment,
Federal Non-Reserved Water Rights, 15 Land and Water L. Rev. 67, 69 (1980);
1 Clark, supra, § 20.2. Since that time, however, federal policy has shifted
increasingly towards conservation and retention of land in federal ownership and
management. The emphasis on retention of lands in federal ownership began
around the turn of the century, with establishment by Congress of several national
parks and forests, and passage o f statutes of general applicability authorizing the
reservation of federally owned land for national forests, parks, and historic
monuments,31 and authorizing management of public domain land to promote
purposes such as grazing or wide use of the resources on such lands.32 In
addition, the federal government began to take an active role in the promotion,
financing, and use of water resources. In the Reclamation Act of 1902, supra
n.27, for example, Congress established broad authorization for federal develop­
ment of facilities to reclaim arid lands. The Federal Power Act, supra n.28,
passed in 1920, authorized the Federal Power Commission to license private
power projects, and other acts provided for federal development or construction

30 For example, § 521 o f the Forest Service statute provides that acquired forest service lands “ shall be
permanently reserved, held and administered as national forest lands under the provisions of section 4 7 1 of this title
and Acts supplemental to and amendatory thereof." 16 U .S.C . § 521.
31 See nn 25, 26 supra
32 See n.24 supra.

340
of large-scale multipurpose flood control, navigation, or power projects.33 Most
recently, in 1976 Congress declared in the Federal Land Policy and Management
Act, supra n.22, that federal policy is to retain public lands in federal ownership
unless it is determined, following procedures mandated by the Act, that disposal
of a particular parcel will serve the national interest.

2. Congressional recognition of state water law

As we described above, even before their admission into the Union, the
western states developed customary and statutory laws governing the acquisition
and use of water within their borders based primarily on appropriative rights. See
Part IIA supra. Federal ownership of much of the underlying land raised the
threat of a general federal law applicable to the acquisition of rights to unap­
propriated water on federal lands. However, in a series of statutes passed in the
last half of the 19th century, Congress rejected the alternative of a general federal
water law, and instead largely acquiesced in comprehensive state control over the
appropriation of water, including water on federal lands, at least with respect to
rights that could be asserted by private appropriators.34
The first of these acts, the Mining Act of 1866,35 officially opened federally
owned lands to exploration and development by miners. Act of July 26, 1866, 14
Stat. 253, codified at 50 U.S.C. §§ 51, 52 and 43 U.S.C. § 661 (1976).
Although the primary purpose of the Act was to allow open mining on federal
lands,36 Congress included a provision that specifically disclaimed any intent to
interfere with water rights and systems that had developed under state and local
law:

Whenever, by priority of possession, rights to the use of water for
mining, agricultural, manufacturing, or other purposes, have
vested and accrued, and the same are recognized and acknowl­
edged by the local customs, laws and the decisions of courts, the
possessors and owners of such vested rights shall be maintained
and protected in the same; and the right of way for the con­

33 See, e g., Boulder Canyon Project Act, 45 Stat. 1057 (1928), 43 U.S C. § 617 (1976), Colorado River Storage
Project, 70 Stat 105 (1956), as amended, 43 U S C § 620 (1976).
34 This deference to state control can be contrasted with Congress’ approach to control over mining on federal
lands, as to which Congress authorized comprehensive procedures and standards for assertion and protection of
mineral claims. See 30 U S C § 22 etseq (1976) The Supreme Court has recently noted that “although mining law
and water law developed together in the West prior to 1866, with respect to federal lands Congress chose to subject
only mining to comprehensive federal regulation.” Andrus v. Charlestone Stone Products Co , 436 U S. 604, 613
(1978).
35 The Homestead Act, passed in 1862 (see n.22 supra), did not contain any reference to water nghts or to the
appropriation of water by homesteaders
36 The 1866 M ining Act was passed to thwart legislative initiatives calling for the sale of mining interests on
federal lands Its effect was to legalize the system of "free mining’’ that had been established by custom and local
rules of the western mining communities The legislative history of the provision indicates that proponents of the
legislation believed it would merely confirm the existing rules and customs. See R. Grow & M Stewart* “The
Winters Doctnne as Federal Common Law,” lONaturalRes Law 457, App at4 8 6 n .l6 (1 9 8 0 )(h erein aftercited as
“Grow & Stewart”)

341
 struction of ditches and canals for the purposes herein specified is
acknowledged and confirmed; . . .
43 U .S.C . § 661 (1976).
Four years later Congress amended the Mining Act of 1866 to extend its
applicability to “ placer” mines. Act of July 9, 1870, 16 Stat. 218, codified at 30
U.S.C. §§ 51, 52, a n d 43 U.S.C. § 661 (1976). In perhaps an overabundance of
caution, Congress reaffirmed in the 1870 Act that water rights obtained under
applicable state or local law were not to be affected by grants made under the Act:
[A]ll patents granted, or preemption of homesteads allowed, shall
be subject to any vested and accrued water rights, or rights to
ditches and reservoirs used in connection with such water rights,
as may have been acquired under or recognized by the [Mining
Act of 1866].
43 U .S.C . § 661 (1976).37
The Supreme Court has interpreted these acts as expressing congressional
recognition of and acquiescence in the water rights law developed by the western
states:
Congress intended [by these acts] “ to recognize as valid the
customary law with respect to the use of water which had grown
up among the occupants of the public land under the peculiar
necessities of their condition.”
California v. United States, supra, 438 U.S. at 656, quoting Basey v. Gallagher,
87 U.S. (20 Wall.) 670,684 (1875). See also United States v. Rio Grande & Dam
Irrigation C o., 174 U.S. 690, 704 (1899) (“ The effect of this statute was to
recognize, so far as the United States are concerned, the validity of the local
customs, laws and decisions of courts in respect to the appropriation of water” ).
The effect of the acts was not limited to recognition of rights that had previously
vested under applicable state law or custom:
They reach[ed] into the future as well, and approvefd] and con-
firm[ed] the policy of appropriation for a beneficial use, as recog­
nized by local rules and customs, and the legislation and judicial
decisions of the arid-land states, as the test and measure of private
rights in and to the non-navigable waters on the public domain.
California Oregon Power Co. v. Beaver Portland Cement Co., 295 U.S. 142,
155 (1935).
In 1877, Congress passed yet a third statute, the Desert Land Act, supra n.22,
which permitted persons in most o f the western states to enter and claim irrigable
lands “ by conducting water upon the same . . . [by] bona fide prior appropria­

37 The legislative history o f this provision o f the 1870 Act is sparse, and indicates only that Congress wanted to
assure that water rights vesting under the 1866 Act would not be adversely affected by the new act. See Grow &
Stewart, supra n.36, App. at 493-94

342
tion.” 38 In what has become an important proviso, Congress limited the amount
of water that could be appropriated by such entrymen under the statute to that
amount “actually appropriated” and “ necessarily used” for irrigation and recla­
mation. Any excess non-navigable water was specifically saved for the public:
[A]ll surplus water over and above such actual appropriation and
use, together with the water of all lakes, rivers and other sources
of water supply upon the public lands and not navigable, shall
remain and be held free for the appropriation and use of the public
for irrigation, mining and manufacturing purposes subject to
existing rights.
43 U.S.C. § 321.
This proviso of the Desert Land Act has been given a somewhat broader
reading by the Supreme Court than might be warranted by its legislative history,
which suggests only that it was included to prevent any individual from monopo­
lizing a source of water on desert lands.39 In California Oregon Power Co. v.
Beaver Portland Cement Co., supra, the Supreme Court construed the Act as
effecting “ a severance of all waters upon the public domain, not theretofore
appropriated, from the land itself,” and reserving those severed waters “ for the
use of the public under the laws of the states and territories named.” 295 U.S. at
158, 162. The Court held that a land patent granted by the federal government to
a settler under the Homestead Act did not carry with it any common law riparian
rights not recognized by the state, because in the Desert Land Act (if not before)
Congress had acquiesced in the authority of the western states to change the
common law riparian system to an appropriative system. Id. at 158. Although the
question before the Court in that case involved competing private rights to water
arising on federal lands, the language used by the Court to describe the effect of
the Desert Land Act is quite broad, and could be interpreted to apply to rights that
may be asserted by the federal government:
What we hold is that following the Act of 1877, if not before, all
non-navigable waters then a part of the public domain became
publici juris, subject to the plenary control cf the designated
states, including those since created out of the territories named,
with the right in each to determine for itself to what extent the rule
of appropriation or the common-law rule in respect of riparian
rights should obtain . . . [t]he Desert Land Act does not bind or
purport to bind the states to any policy. It simply recognizes and
38 The Desert Land Act applies only to California, Colorado, Oregon, Nevada, Washington, Idaho, Montana,
Utah, Wyoming, Arizona, New Mexico, and North and South Dakota. 43 U.S.C. § 323(1976). It does not apply to
Kansas, Nebraska, Oklahoma, or Texas.
19 See F Trelease, Federal Reserved Water Rights Since PLLRC, 54 Denver L J 473,476(1977). At the time the
Act was proposed, concern was voiced that the language “ conducting water” upon the desert lands might work a
partial repeal of the 1866 and 1870 Acts, and would permit a settler to monopolize available water by conducting it
across his land and selling it to contiguous owners See Grow & Stewart, supra n 36, App. at 495 & n 48. The
language quoted above was included to make it clear that an entryman could acquire only such rights as are available
by appropriation under stale law (i e , limited to the quantity necessary for actual beneficial use). Id.

343
 gives sanction, in so far as the United States and its future
grantees are concerned, to the state and local doctrine of appro­
priation, and seeks to remove what otherwise might be an impedi­
ment to its full and successful operation.
295 U.S. at 163-64 (emphasis added). The Desert Land Act has been held
inapplicable to federal reserved lands. See Federal Power Commission v.
Oregon, 349 U.S. 435, 448 (1955), discussed at pp. 26-27, 32-33, & n.52.
Thus, in the Mining Acts of 1866 and 1870and the Desert Land Act, Congress
deferred to development by the states of comprehensive water codes and admin­
istrative systems, at least with respect to rights of private appropriators. Notwith­
standing the broad language in the statutes and in California Oregon Power Co. v.
Beaver Portland Cement Co., supra, it is not so clear, as we discuss infra, that
Congress also intended to subject federal uses of that water to state water law. In
that regard, we must consider statutes that touch on the federal government’s use
of water, including, most importantly, the Reclamation Act of 1902, supra n.27,
the Federal Power Act, supra n.28, passed in 1920, and the McCarran Amend­
ment, July 10, 1952 , 66 Stat. 560, 43 U.S.C. § 666.
The 1902 Reclamation Act authorized joint federal-state efforts to construct
large-scale reclamation projects on federal lands, subject to the jurisdiction and
oversight of the Secretary of the Interior through the Bureau of Reclamation.
Several provisions of the Act and subsequent amendments deal explicitly with the
acquisition, use, and distribution of water. Section 8 provides expressly for the
application of state law:
Nothing in [this title] shall be construed as affecting or intending
to affect or to in any way interfere with the laws of any State or
Territory relating to the control, appropriation, use or distribution
of water used in irrigation, or any vested right acquired there­
under, and the Secretary of the Interior, in carrying out the
provisions of [the Act], shall proceed in conformity with such
laws, and nothing herein shall in any way affect any rights of any
State or of the Federal Government or of any landowner, appropri­
ator, or user of water in, to, or from any interstate stream or the
waters thereof.
43 U.S.C. § 383. Other specific restrictions on the use or distribution of water
reclaimed in a federal project appear in § 5, 43 U.S.C. § 431, which prohibits
the sale of reclamation water to tracts of land in excess of 160 acres, and § 9 of the
Reclamation Project Act of 1939, 43 U.S.C. § 485h, which provides for repay­
ment to the United States of funds expended in the construction of reclamation
works and authorizes the Secretary of the Interior to make contracts to furnish
reclamation water at appropriate rates for irrigation.
The Federal Power Act established a comprehensive licensing scheme for
water power projects constructed by private or public entities on navigable
streams or federally owned land. The Act contains two provisions referring to the
344
applicability of state laws: § 9b, which requires an applicant to present evidence
of “satisfactory compliance” with certain state laws;40 and § 27, which expressly
saves certain state laws relating to property rights in the use of water from
supersedure by the Act.41
The McCarran Amendment is not a substantive statute, but rather a limited
waiver of sovereign immunity permitting the United States to be joined as a party
in state general stream adjudications. It does not affect the federal government’s
substantive rights with respect to water on federal lands. However, the Act has
often been relied upon as evidence of congressional recognition of the primacy of
the western states’ interests in regulating and administering water rights. See,
e.g., California v. United States, supra, 438 U.S. at 678-79. This position is
supported by the Senate Report on the Amendment, which states that:
In the arid Western States, for more than 80 years, the law has
been the water above and beneath the surface of the ground
belongs to the public, and the right to the use thereof is to be
acquired from the State in which it is found, which State is vested
with the primary control thereof . . . . Since it is clear that the
States have the control of water within their boundaries, it is
essential that each and every owner along a given water course,
including the United States, must be amenable to the law of the
State, if there is to be a proper administration of the water law as it
has developed over the years.
S. Rep. No. 755, 82d Cong., 1st Sess. 3, 6 (1951) (emphasis added).
In each of these statutes, Congress recognized that the western states have a
legitimate interest in and responsibility for the allocation of water resources
within their borders. Specific provisions of federal statutes such as the Reclama­
tion Act and Federal Power Act, however, have led to conflicts between federally
mandated uses of water and state regulation of those uses. Those conflicts were
left to the courts to resolve.
3. Judicial recognition of federal water rights
The Supreme Court has grappled on several occasions with the federal
government’s rights to use or dispose of water in the western states in the context
of particular federal statutes, including the Reclamation Act and the Federal
Power Act and statutes authorizing the reservation of land for particular federal
purposes. Because Congress has not legislated definitively on the scope of the
40 Section 9(b) requires an applicant lo provide the Federal Power Commission with “ satisfactory evidence that
[he] has complied with the requirements of the laws of the State or States within which the proposed project is to be
located with respect to bed and banks and to the appropriation, diversion, and use of water for power purposes and
with respect to the right to engage in the business of developing, transmitting, and distributing power, and in any
other business necessary to effect the purpose of a license under this chapter” 16 U.S C § 802(b).
41 Section 27 provides that “ [njothing herein contained shall be construed as affecting or intending to affect or in
any way to interfere with the laws of the respective States relating lo the control, appropriation, use or distribution of
water used in irrigation or for municipal or other uses, or any vested right acquired therein ” 16 U.S C. § 821.

345
federal government’s rights to use water on federal lands in the western states,42
we must look at the Court’s construction of those specific statutes to determine the
principles and analysis the Court would apply to questions of federal rights that
have not yet been litigated.
The Supreme Court has recognized that even if a particular federal statute does
not expressly authorize a federal agency to acquire water rights without regard to
applicable state law, the federal government may nonetheless in some circum­
stances assert an implied right to use or divert unappropriated water in derogation
of state law. The Supreme Court’s recognition of such implied rights has rested in
each case on a finding of implied congressional intent to preempt application of
state law. The Court has found such intent in at least two circumstances: (1) when
land is reserved from the public domain for a specific federal purpose (see United
States v. New Mexico, supra); or (2) when state regulation of the use of water by a
federal agency or licensee is inconsistent with specific congressional directives
governing the construction or operation of a federal project requiring the use of
water (see California v. United States, supra).43
a. Federal reserved rights.
It is now settled that when the federal government reserves land for a particular
federal purpose, it also reserves, by implication, enough unappropriated water as
is reasonably necessary to accomplish the purposes for which Congress author­
ized the land to be reserved, without regard to the limitations of state law. The
right to that water vests as of the date of the reservation, whether or not the water is
actually put to use, and is superior to the rights of those who commence the use of
water after the reservation date. See Cappaert v. United States, 426 U.S. 128,
138 (1976); United States v. New Mexico, supra, 438 U.S. at 698.
Although the reserved rights doctrine is now well-recognized, its contours and
scope have been defined only recently. The doctrine had its origins in United
States v. Rio Grande Dam & Irrigation Co., 174 U.S. 690 (1899). In that case,
the Court upheld an injunction restraining the petitioner from constructing an
irrigation dam that would have destroyed the navigability of the Rio Grande
River. While the Court recognized that Congress had by statute acquiesced in the
substitution of appropriative water rights for common law riparian rights in the
western states (see p. 20 supra), it found that Congress had not waived its
superior authority under the Commerce Clause to preserve the navigability of
navigable waters. The Court listed two “ limitations” inherent in the Supremacy
Clause on the authority of the states to change the common-law rules:
First, that, in the absence of specific authority from Congress, a
state cannot, by its legislation, destroy the right of the United
States, as the owner of lands bordering on a stream, to the
continued flow of its waters, so far, at least, as may be necessary
42 See n 91 infra.
43 As we discuss infra, the constitutional basis for federal water nghts is the same in both circumstances
enumerated above, whether the nghts fall within the “ reserved” nghts category or within the category of “ specific
congressional directives.” Because the Supreme Court has developed the reserved right doctnne in a few, well-
defined cases, for clarity we will set out the decisions in these two categories separately.

346
 for the beneficial uses of the government property; second, that it
is limited by the superior power of the general government to
secure the uninterrupted navigability of all navigable streams
within the limits of the United States.
174 U.S. at 703. The Court’s holding rested only on the second limitation— i.e.,
the federal goverment’s superior authority under the Commerce Clause to pre­
serve the navigability of the stream.44
Nine years later in Winters v. United States, 207 U.S. 565 (1908), the Court
relied, inter alia, on the first limitation described in Rio Grande —the inability of
the state to destroy the federal government’s rights to the continued flow of a
stream “ at least, as may be necessary for beneficial uses of government proper­
ty”—to support implication of a so-called “reserved” right to water under a
treaty between the federal government and the Indians of the Fort Berthold
Reservation. The treaty set aside particular tracts of the public domain as a
homeland for the Indians, but did not expressly provide for the water necessary to
irrigate that land. The Court found nonetheless that the treaty and reservation of
land impliedly set aside sufficient water for the present and future needs of the
Indians, reasoning that Congress’ intent that the Indians become a pastoral and
civilized people could not be accomplished without sufficient water to irrigate the
reservation land. 207 U.S. at 576. Citing Rio Grande, the Court opined that,
“ [t]he power of the Government to reserve the waters and exempt them from
appropriation under the state laws is not denied, and could not be.” Id. at 577.
Until 1955, the Winters, or reserved right doctrine, was generally thought to be
a special rule of Indian law, rather than a general rule applicable to all federal
reservations. See F. Trelease, “ Federal Reserved Water Rights Since PLLRC,”
54 Denver L. J. 475 (1977). In 1955, the Supreme Court suggested for the first
time that other types of federal reservations might also provide a basis for federal
reserved rights. In Federal Power Commission v. Oregon, 349 U.S. 435 (1955),
often referred to as the Pelton Dam decision, the Court considered whether a state
agency could deny permission to a federal licensee under the Federal Power Act
to construct a hydroelectric dam on lands of the United States that had been
reserved for that purpose. The state argued, relying on the Court’s broad
language in California Oregon Power Co. v. Beaver Portland Cement Co. (see
pp. 21-22 supra), that by the Desert Land Act of 1877 Congress had expressly
conveyed to the states the power to regulate all unappropriated water within their
borders, and that therefore, in the exercise of its police powers, Oregon could
deny use of those waters to an individual, even if the federal government had
otherwise licensed the use. The Court rejected the state’s arguments on the
ground that the Desert Land Act applies only to public domain lands and does not
apply to lands that have been reserved by the federal government, even if the land
44 Nearly seventy years later, the Supreme Court slated that the holding in Rio Grande was limited, and lo be
construed as reaffirming the rights of the states over disposition and use of water except in narrow and specific
circumstances “ [E]xcept where the reserved rights or navigation servitude of the United States are invoked, the
Stale has total authority over its internal waters." California v. United States, supra, 438 U.S. at 662 (emphasis
added).

347
was reserved after passage of the Desert Land Act. See 349 U.S. at 448.
Although the Pelton Dam decision did not involve directly the federal govern­
ment’s right to use water because the licensee was a private party, the Court’s
holding implies that the licensee was exercising some right of the United States to
use water that had been reserved from state control at the time the United States
reserved the dam site. See, e.g., Cappaert v. United States, supra, 426 U.S. at
144 n.10; Federal Power Commission v. Oregon, supra, 349 U.S. at 453
(Douglas, J., dissenting).
The applicability of the reserved right doctrine to all federal reservations was
confirmed in Arizona v. California, 373 U.S. 546 (1963). There, the Court
upheld, with little discussion, a M aster’s award of reserved rights to the United
States in several national wildlife refuges and the Gila National Forest:
The Master ruled that the principle underlying the reservation of
water rights for Indian Reservations was equally applicable to
other federal establishments such as National Recreation Areas
and National Forests. We agree with the conclusions of the Master
that the United States intended to reserve water sufficient for the
future requirements of the Lake Mead National Recreation Area,
the Havasu Lake National Wildlife Refuge, the Imperial National
Wildlife Refuge and the Gila National Forest.
373 U.S. at 601.
The scope of the reserved rights doctrine on non-Indian land remained some­
what uncertain until the Supreme Court’s decisions in Cappaert v. United States,
supra, and United States v. New Mexico, supra. In Cappaert, the Court unan­
imously held that the reservation of Devil’s Hole as a national monument under
the American Antiquities Preservation Act, supra n.25, also reserved sufficient
unappropriated water to maintain the scientific value of the reservation— in that
case, to maintain the water level in Devil’s Hole at the minimal level necessary to
preserve the Devil’s Hole pupfish, a unique species that had been endangered by a
drop in the water level.45 The Court stated that:
[t]his Court has long held that when the Federal Government
withdraws its land from the public domain and reserves it for a
federal purpose, the Government, by implication, reserves appur­
tenant water then unappropriated to the extent needed to accom­
plish the purpose of the reservation. In so doing the United States
acquires a reserved right in unappropriated water which vests on
the date of the reservation and is superior to the rights of future
appropriators. Reservation of water rights is empowered by the
Commerce Clause, Art. I, § 8, which permits federal regulation
of navigable streams, and the Property Clause, Art. IV, § 3,
45 The case arose as an action by the United States to enjoin pumping of wells by owners of a ranch near the Devil’s
Hole Monument The pumping had been authorized by a state permit after the date of reservation of the monument
See 426 U .S. at 134-35.

348
 which permits federal regulation of federal lands. The doctrine
applies to Indian reservations and other federal enclaves, encom­
passing water rights in navigable and nonnavigable streams.
426 U.S. at 138 (citations omitted).
The Court made it clear that the determinative issue was whether the federal
government intended to reserve unappropriated water, and that such intent would
be inferred if “ previously unappropriated waters are necessary to accomplish the
purposes for which the reservation was created.”46 426 U.S. at 139. The amount
of water reserved, however, was “ only that amount of water necessary to fulfill
the purpose of the reservation, no more.” Id. at 141 (citations omitted).
In United States v. New Mexico, the Court upheld, for the first time, a denial of
reserved rights to the federal government. In New Mexico, the Forest Service
asserted reserved rights to waters within the Gila National Forest, including
minimum instream flows, “ for the requirements and purposes of the forests” as
of the date that various tracts of public lands were withdrawn from the public
domain for inclusion in the Forest. The Forest Service’s claims to reserved rights
for, inter alia, maintenance of instream flows, recreation, and stock watering
were initially granted by the special master appointed to consider all the claims,
but were denied by the New Mexico District and Supreme Courts on appeal, on
the basis that those uses were not among the purposes included in the Forest
Service’s Organic Administration Act, pursuant to which the Gila National Forest
was created. The New Mexico Supreme Court drew a distinction between the
“ primary purposes” for which a federal reservation is created, and “secondary
uses” of federal lands that ma; be permitted or authorized by statute or admin­
istrative practice, finding that only the former provides a basis for reserved rights.
The New Mexico Supreme Court found the primary purposes of national forest
reservations to be limited to the preservation of timber and securing of water flows
for public and private uses. Mimbres Valley Irrigation Co. v. Salopek, 90 N.M.
410, 564 P.2d 615, 617-18 (1977).
The United States Supreme Court agreed with both the result and analysis of
the New Mexico Supreme Court. Justice Rehnquist, writing for the majority,
noted that the application of the reserved right doctrine requires a careful
examination of “ both the asserted water right and the specific purposes for which
the land was reserved” and must rest on the conclusion that “without the water
the purposes of the reservation would be entirely defeated.” 438 U.S. at 700
(footnote omitted). Such an examination and tailoring of the reserved right is
necessary “ because the reservation is implied, rather than explicit and because of
the history of congressional intent in the field of federal-state jurisdiction with
respect to allocation of water.” Id. at 701-02. The Court noted that, “ [wjhere
Congress has expressly addressed the question of whether federal entities must

46 The Court actually found the requisite congressional intent to be explicit, rather than implied, because the 1952
presidential proclamation reserving the land recited that the “ pool . . . should be given special protection.” 426
U S at 140

349
abide by state water law, it has almost invariably deferred to the state law.”47Id. at
702 (footnote omitted).
The Court accepted the primary purpose/secondary use distinction drawn by
the New Mexico Supreme Court:
Where water is necessary to fulfill the very purposes for which a
federal reservation was created, it is reasonable to conclude, even
in the face of Congress’ express deference to state water law in
other areas, that the United States intended to reserve the neces­
sary water. Where water is only valuable for a secondary use of the
reservation, however, there arises the contrary inference that
Congress intended, consistent with its other views, that the
United States would acquire water in the same manner as any
other public or private appropriator.
Id. (emphasis added). Based on the legislative history of the Forest Service’s
Organic Administration Act, the Court concluded that Congress’ intent in author­
izing reservation of the Gila National Forest was “ that water would be reserved
only where necessary to preserve the timber or to secure favorable water flows for
private and public uses under state law.” Id. at 718.48 The Court found recreation,
wildlife, and stock watering to be secondary uses rather than primary purposes of
the reservation, and therefore upheld the state court’s denial of reserved rights for
those uses. The Court did not address the further question whether, if the Forest
Service applied under state law for appropriative rights not available under the
reserved rights doctrine, the state could deny such rights.49
After Cappaert and New Mexico, it is safe to conclude that a federal agency
may acquire unappropriated water on federal lands without regard to state
substantive or procedural law, when that land has been reserved pursuant to
congressional authorization for a specific federal purpose that requires the use of
water. The right is based on implied congressional intent, and is limited in two
47 In California v. United States, supra, decided the same day as New Mexico, Justice Rehnquist, again speaking
for the majority, discussed at length the “ purposeful and continued deference to state water law by Congress,”
including principally the Mining Acts of 1866 and 1870, the Deserf Land Act and the Reclamation Act of 1902. 438
U.S. at 653-70
48 The opinion of the Court also concluded that the Multiple-Use Sustained-Yield Act of 1960, 16 U S.C. § 528
(MUSYA), which provides that national forests “ shall be administered for outdoor recreation, range, timber,
watershed, and wildlife and fish purposes,” does not provide any basis for assertion of reserved nghts in forests
existing as of the effective date of the MUSYA “ for the secondary purposes there established ” 438 U S at 715. The
Court “ intimate[d] no view as lo whether Congress [in the MUSYA] authorized the subsequent reservation oi
national forests out of public lands to which a broader doctrine of reserved water nghts might apply.” Id. at n.22 As
Justice Powell pointed out in his partial dissent from the Court’s opinion, the Court’s statements on the effect of the
MUSYA are probably dicta because the United States did not argue that the MUSYA reserved additional water for
use on national forests, but only that the Act confirmed Congress’ intent in the Organic Administration Act to
establish multiple purposes that include fish, wildlife, and recreation See id at 718 n. 1.
49 New M exico was a split decision, with Justices Brennan, White, and Marshall joining in a dissent written by
Justice Powell The dissenters, however, did not take issue with the conclusion of the majority that Congress had
generally deferred to state water law and therefore “that the implied-reservation doctrine should be applied with
sensitivity to its impact upon those who have obtained water nghts under state law and to Congress’ general policy of
deference to state law,” and concurred in the m ajonty’s conclusion that the Organic Administration Act could not be
read “as evidencing an intent to reserve water for recreational or stock watenng purposes ” 438 U.S at 718 The
dissenters disagreed rather with the majority’s narrow reading of the legislative history of the Organic Administra­
tion Act to exclude preservation of wildlife as a primary purpose of the reservation of national forests Id. at 719

350
crucial respects. First, federal rights will be implied only if necessary to accom­
plish the specific purposes for which Congress authorized reservation of the land,
not for incidental, or “secondary” uses that may be permitted by congressional
authorization or acquiescence in agency practice. Drawing the line between the
“primary purposes” for which water may be reserved and the “secondary uses”
for which water may not be reserved requires a careful examination of con­
gressional intent, as expressed in the particular statute authorizing reservation
and management of the land in question and its legislative history. Second, the
amount of water reserved is only that minimally necessary to accomplish those
primary purposes— i.e., that water “without [which] the purposes of the reserva­
tion would be entirely defeated.” United States v. New Mexico, supra, 438 U.S.
at 700.
b. Conflicts with congressional directives.
In the second relevant line of decisions, the Court has held that a state may not
veto a federally authorized water project by requiring the federal government or
its licensee to obtain a state permit authorizing use of water necessary for the
project, and may not impose conditions on the acquisition, use, or distribution of
project water that are inconsistent with specific congressional directives authoriz­
ing the project. Although in these cases the Court has not developed a coherent
theory of water rights comparable to the reserved right theory, there is a common
thread: when the federal government, in the exercise of its constitutional powers,
for example under the Commerce or Property Clauses, authorizes a project
requiring the diversion or use of water, state laws that would effectively prevent
the project from being built or operated under the conditions and terms and for the
purposes prescribed by Congress must fall under the Supremacy Clause.
The Court has consistently held that a state cannot block construction or
operation by the United States or its licensee of dams and reservoirs for flood
control, improvement of navigation, power production, or reclamation.50 For
example, in Oklahoma v. Guy F. Atkinson Co., 313 U.S. 508 (1941), the Court
held that Oklahoma could not block construction by the United States of a dam
and reservoir for purposes of flood control and improvement of navigability on
the Red River in Oklahoma and Texas. One of the objections raised by Oklahoma
to the federal project was that construction of the dam and impoundment of the
waters would be inconsistent with the state’s water resources program. The Court
rejected that argument, finding that:
[T]he suggestion that this project interferes with the state’s own
program for water development and conservation is likewise of no
50 The Supreme Court has recognized that Congress’ constitutional authority to construct or license such projects
can stem from any of several constitutional grants of power, such as the Commerce Clause, which provides the basis,
inter aha. for regulation and promotion of the navigability of streams, the Property Clause, which authorizes
Congress to manage federal lands, or the General Welfare Clause. See, e g , Oklahoma v. Guy F. Atkinson Co., 313
U.S. 508,534 (1941) (flood control and navigation project authorized under Commerce Clause); First Iowa Coop. v.
Federal Power Comm’n, 328 U S. 152, 176 (1946) (hydroelectric project on navigable stream authorized under
Commerce Clause), Federal Power Comm'n v Oregon, 349 U S. 435, 445 (1955) (hydroelectric project on non-
navigable stream authorized under Property Clause, because project to be constructed on federal lands); United
States v. Gerlach Live Stock Co . 339 U.S 725, 737-38 (1950) (reclamation project authorized under General
Welfare Clause).

351
 avail. That program must bow before the “superior power” of
Congress.
313 U.S. at 534—35 (citations omitted).
Similarly, in cases involving federal licenses to construct hydroelectric proj­
ects awarded under the Federal Power Act, the Court has consistently rejected
state attempts to block authorization of the construction of project facilities and
reservoirs. See, e.g., First Iowa Cooperative v. Federal Power Commission, 328
U.S. 152, 176 (1946); Federal Power Commission v. Oregon, 349 U.S. 435,445
(1955); City of Tacoma v. Taxpayers cf Tacoma, 357 U.S. 320, 340 (1958).
Although some of the language used by the Court in those decisions suggests that
state law or permit requirements do not apply to federally licensed projects even
if they are consistent with the authorization of the project,51 in each case
application of state law would have prevented construction of the project.52Given
a direct conflict between federal authorization and state requirements, the Court
held that the state law must fall, even though the Federal Power Act contained
savings provisions reserving traditional control over water resources to the
individual states. See First Iowa Cooperative v. Federal Power Commission,
supra, 328 U.S. at 176; City cf Tacoma v. Taxpayers cf Tacoma, supra, 357 U.S.
at 340; Federal Power Commission v. Oregon, supra, 349 U.S. at 445.
The Court has reached similar conclusions in cases involving the reclamation
laws.53 Despite the direction of § 8 of the 1902 Reclamation Act that the
Secretary of the Interior “proceed in conformity” with applicable state laws (see
pp. 22-23 supra), the Court has held that state law or permit requirements are
preempted if they are inconsistent with other, more specific provisions of the Act
or of the legislation authorizing the project. In Ivanhoe Irrigation District v.
McCracken, 357 U.S. 275 (1958), the Court reversed the refusal of the California
Supreme Court to confirm certain reclamation contracts that contained clauses
implementing § 5 of the Reclamation Act of 1902 and § 9 of the Reclamation
Project Act of 1939 (see p. 23 supra) because limitations imposed by those
sections were inconsistent with California law. The California Court had held that
51 For example, in First fowa Coop , Ihe C ourt, discussing the effect of the savings provisions of the Act, noted
broadly that “in those fields where rights are not thus ‘saved’ to the States, Congress is willing to let the supersedure
of the state laws by federal legislation lake its natural course " 328 U.S. at 176. See generally Federal Power
Comm’n v Oregon, supra. 349 U .S. at 444—45 (“There thus remains no question as to the constitutional and
statutory authority of the Federal Power Commission to grant a valid license fora power project on reserved lands of
the United States, provided that, as required by the Act, the use of the water does not conflict with vested nghts of
others. To allow Oregon to veto such use, by requiring the State’s additional permission, would result in the very
duplication of regulatory control precluded by the First Iowa decision ”) (citations omitted).
52 In First Iowa Coop , the power cooperative’s development plan required diversion of the Cedar River into
another basin in order to get a greater drop and head for water power. That plan would have been barred by an Iowa
statute requinng that any water taken from a stream for power purposes be returned lo the same stream at the nearest
practicable location. See 328 U S. at 166 In Federal Power Comm’n v. Oregon, the Stale of Oregon sought lo
prevent construction of the dam because it would cut off anadromous fish from their spawning and breeding grounds
349 U .S. at 449-50. City c f Tacoma involved a conflict between the terms upon which the FPC issued a license to the
City to construct a power dam on the Cowlitz River, and a Washington statute prohibiting the construction of dams
over 25 feet in height on the Cowlitz or other state streams tnbutary to the Columbia, for protection of salmon. See
357 U .S. at 328 n. l l .
53 Most large federal reclamation projects are authorized by specific legislation and appropriations, but incorpo­
rate by reference the provisions of Ihe federal “reclamation laws.” including, most importantly, the 1902 Act. See,
e.g.. California v. United States, supra, 438 U .S. at 651 n 6.

352
§ 8 required that “whenever there is a conflict between the Federal Reclamation
laws and the laws of the State, the law of California must prevail.” 357 U.S. at
287. The United States Supreme Court held that the general savings provision of
§ 8 could not override the mandatory, specific provisions of § 5 and § 9. Id. at
292.54 The Court reaffirmed this view of § 8 in City cf Fresno v. California, 372
U.S. 627 (1963), in which the Court held that § 8 does not require the Secretary
of the Interior to ignore the explicit preference established by § 9(c) of the
Reclamation Act of 1939 for irrigation over domestic and municipal uses of
reclamation water (see p. 23 supra)', and in Arizona v. California, 373 U.S. 546
(1963), in which the Court concluded that state law could not interfere with the
power of the Secretary of the Interior, under the Boulder Canyon Project Act,
supra n.33, to determine with whom and on what terms water contracts would be
made.
Language used by the Supreme Court in Ivanhoe, Fresno, and Arizona
suggested that the scope of § 8 was extremely narrow. In Ivanhoe, for example,
the Court stated that § 8 “merely requires the United States to comply with state
law when, in the construction and operation of a reclamation project, it becomes
necessary for it to acquire water rights or vested rights therein.” 357 U.S. at 291.
The Court suggested in Fresno that state law would not control even the
acquisition of water rights when the United States exercises its power of eminent
domain, but instead would only determine the “definition of the property inter­
ests, if any, for which compensation must be paid.” 372 U.S. at 630. In Arizona,
the Court endorsed its broad holdings in Ivanhoe and Fresno, noting “ [t]he
argument that § 8 of the Reclamation Act requires the United States in the
delivery of water to follow priorities laid down by state law has already been
disposed of by this Court . . . .” 373 U.S. at 586.
However, in California v. United States, supra, decided the same day as
United States v. New Mexico, the Court made clear that its decisions in Ivanhoe,
Fresno, and Arizona could be read only to hold that state laws governing the
appropriation, use, control, or distribution of water do not control federal uses if
they are inconsistent with specific congressional directives, for example § 5 of
the Reclamation Act or § 9 of the Reclamation Project Act of 1939. California v.
United States involved construction of the New Melones Dam in California, part
of the mammoth Central Valley Reclamation Project, which has spawned much
of the case law under the Reclamation Act.55 The California State Water Re­
sources Control Board, upon application by the Bureau of Reclamation, author­
ized the impoundment of water for the project, but imposed several conditions on
the use of that water. The Bureau of Reclamation then sought a declaratory
54 The Court also rejected a constitutional challenge to the reclamation projects in question, finding that “[tjhere
can be no doubt of the Federal Government’s general authority to establish and execute” the projects under the
General Welfare Clause and Property Clauses of the Constitution. 357 U S at 294-95 Those clauses give the
federal government the power “to impose reasonable conditions on the use of federal funds, federal property, and
federal privileges,” and prohibit the states from “compel[ling] uses of federal property on terms other than those
prescribed or authorized by Congress ” Id. at 295
55 See, e g , United States v. Gerlach Live Stock Co , 339 U.S. 725 (1950); Ivanhoe Irrigation District v
McCracken, supra; City o f Fresno v California, supra; Dugan v Rank, 372 U S 609 (1963).

353
judgment that the United States could impound whatever unappropriated water
was necessary for the project without complying with state law.
The District Court held that the United States must apply to the State Board for
an appropriation permit as a matter of comity, but that the Board must issue the
permit without condition if there is sufficient unappropriated water. United States
v. California, 403 F. Supp. 847 (E.D. Cal. 1975). The Ninth Circuit affirmed, but
held that § 8 of the Reclamation Act of 1902, rather than comity, required the
United States to apply for the permit. United States v. California, 558 F.2d 1347
(9th Cir. 1977). In the Supreme Court the United States argued for affirmance of
the decisions below on the ground that a state may not impose any conditions on a
federal reclamation project, whether or not they may be consistent with author­
ization for construction and operation of the project. See Brief for the United
States at 31-55, California v. United States, 438 U.S. 645 (1978).56
In its decision reversing the Ninth Circuit, the Supreme Court recognized that
its prior statements regarding the effect of § 8 of the Reclamation Act of 1902
could be read to support the United States’ argument, but the Court characterized
those statements as dicta “to the extent [they] impl[y] that state law does not
control even where not inconsistent with . . . expressions of congressional
intent.” 438 U.S. at 671 n.24. The Court pointed out that each of its prior
decisions involved a direct conflict between state law and a specific provision of
the federal reclamation laws, and therefore disavowed that dicta insofar as it
“would prevent petitioners from imposing conditions on the permit granted to the
United States which are not inconsistent with congressional provisions authoriz­
ing the project in question.” Id. at 674. Because the courts below had not reached
the question whether the conditions actually imposed were inconsistent with
congressional directives authorizing the New Melones project, the Court re­
manded the case for further consideration.57 The Court suggested that on remand
the district court would be free to consider arguments that the legislation
authorizing the New Melones project had “by its terms signified] congressional
intent that the Secretary condemn or be permitted to appropriate the necessary
water rights for the project in question.” Id. at 669 n.21.58
56 The United States also argued that the conditions imposed on the permit granted by the California Board were
inconsistent with the terms upon which construction and operation of the project had been authorized. See U.S.
Brief at 57-85 Because the lower courts had both found that California could not impose any substantive conditions
on the permit, this argument was not considered below.
57 Three justices (White, Brennan, and Marshall) dissented from the majority’s decision, on the ground that § 8
should be read narrowly, as it was in Ivanhoe, Fresno, and Arizona, to deal only with the acquisition of water rights
and to require only that the United States respect water rights that have been vested under state law See 438 U S. at
691. The dissent would have upheld the lower court decisions “that the State was without power under the
reclamation laws to impose conditions on the operation of the New Melones Dam and on the distribution of project
water developed by that Dam, which would be undertaken with federal funds.” Id. at 693 Justice Powell, who wrote
the dissent in United States v. New Mexico, joined in the majority in California.
58 On remand, the district court found that certain conditions imposed by the California Board on the amount and
purposes of water to be appropriated, the times of the year in which water could be appropriated, and the distribution
of water outside certain counties were not inconsistent with Congress’ purpose in authorizing the New Melones
project. O ther conditions, for example, those imposing limitations on the use of impounded water for the production
of power were rejected as inconsistent with the congressional intent. United States v California, 509 F. Supp 867
(E.D . Cal 1981). Cross-appeals were filed in the Ninth Circuit Those appeals have been briefed and argued and are
pending decision. U nitedStates v State of California, C A Nos 81—4189 and 81—4309 {appeals docketed Apr 10,
1981, and June 5, 1981).
354
 c. Administrative practice and interpretations.
Because the Supreme Court and Congress have not definitively answered
many of the questions in the area of federal-state water rights, administrative
practice and interpretation by the federal land management agencies have served
to fill some of the interstices. We understand that there has never been a uniform
policy among the agencies with primary responsibility over federal lands regard­
ing the extent to which the federal government should or would comply with state
laws and procedures in acquiring water rights or give notice to appropriate state
agencies or officials of the water needs and uses of the agency.59 Agencies have
participated in general stream adjudications, at least since passage of the McCar-
ran Amendment in 1952,60 and have litigated water rights in individual cases, but
have not developed wholly consistent policies as to whether they should file all
water right claims with state agencies. See Report cf the Task Force on Non-
Indian Federal Water Rights at 35 (Government Printing Office 1980) (here­
inafter cited as Task Force Report). For example, the Forest Service and Fish and
Wildlife Service, at least since the 1930s, have generally attempted to notify the
states of water uses and needs and to file for some water rights pursuant to
applicable state law. Task Force Report at 36. Since 1946, the Forest Service has
generally not filed for water rights on reserved lands, although it has filed for
water rights on acquired lands and, since 1966, has informed state officials of the
scope of its reserved water rights. The policy of the National Park Service has
been to comply with state water laws, particularly with respect to rights not
available under the reserved right doctrine. Id. Other agencies have often com­
plied with state procedures in acquiring water rights, but have also asserted rights
or used water in many instances without compliance with state law or notice to
appropriate state authorities.61
While the ad hoc approach reflected in the practice of responsible agencies
may have accommodated both state and federal concerns when water supplies
were relatively ample, over-appropriation of streams in most of the western states
and increasing competition for water between and among private and public users
has led to efforts at the state and federal levels to achieve certainty in the
definition and allocation of water rights. In 1978, President Carter submitted a
Federal Water Policy Message to Congress, which recognized the difficulties
created for the states by the existence of unquantified, undetermined federal
59 These agencies include, most importantly, the Department of the Interior, which has jurisdiction over all public
domain lands and some reserved lands, such as national parks, refuges, and wilderness areas; the Department of
Agriculture, which, through its Forest Service, has jurisdiction over the national forests; and the Department of
Defense, which has jurisdiction over military bases and reservations and, through the Army Corps of Engineers,
over flood control and navigattonal public works.
60 See, e g.. United States v. District Court in and fo r Water Division No. 5, 401 U.S 527 (1971); Colorado River
Conservation District v United States, 424 U.S 800 (1976).
61 For example, following the Pelton Dam decision in 1955, the Department of the Navy apparently ceased filing
any claims for water with state agencies. See Nevada ex rel. Shambergerv United States, supra n 29, 165 F. Supp.
at 606. That has not, however, been the consistent position of the Department of Defense since then We understand,
for example, that the Air Force has agreed that water necessary for deployment of the MX missile system in Nevada
and Utah will be appropriated only under state laws See Letter from Grant C Reynolds, Assistant General Counsel,
Department of the Air Force, to Myles E. Flint, Chief, General Litigation Section, Land and Natural Resources
Division, Dept, of Justice (Nov 19, 1981).

355
reserved rights to water in the western states, and recommended that priority be
given to quantification of federal reserved rights.62 At the same time, federal
agencies were directed to expeditiously establish and quantify federal reserved
rights.
In response to this initiative, Solicitor Krulitz of the Department of the Interior
issued a formal opinion in June 1979, covering both “reserved” and “non-
reserved” water rights under statutes authorizing the Department of the Interior to
manage federal lands. As we discuss in the next segment of this opinion, Solicitor
Krulitz articulated the non-reserved water rights theory of the Department of the
Interior, stating that the federal government had a right to use water for “congres-
sionally authorized uses” irrespective of any reservation of land. Solicitor
Krulitz’s opinion provoked a maelstrom in the western states and an almost
immediate decision by Interior Secretary Andrus not to implement segments of
the Krulitz opinion except in very limited circumstances. Secretary Andrus’
announcement was followed in January 1981 by an opinion by Solicitor Krulitz’s
successor, Solicitor Clyde 0. Martz, restricting the application of the Krulitz
opinion. In September 1981, the current Solicitor, William H. Coldiron, issued
an opinion repudiating the legal basis and conclusions of the Krulitz opinion.
Since these opinions have shaped much of the recent debate on the scope of
federal water rights,63 we will review them in detail here.
i. Krulitz Opinion
In his opinion, Solicitor Krulitz set out to analyze comprehensively the legal
bases for the Department of the Interior to assert rights to water on federal lands.
In addition to federal reserved rights, Solicitor Krulitz concluded that the federal
government has the right to make use of unappropriated water on federal lands
without regard to state substantive or procedural law, so long as the water is
necessary to carry out “congressionally authorized purposes” or “uses,” unless
Congress clearly and expressly directs otherwise—the so-called federal “non­
62 Pub. Papers c f Jimmy Carter, 1978, pp. 1044-51. Pursuant to this initiative, a Task Force on Non-Indian
Reserved Rights was established. The Task Force issued a final report in 1980, in which it recommended, inter alia,
that federal agencies attempt to quantify all current and future water requirements, that state law be used to the fullest
extent possible for water uses not subject to existing reserved rights, and that the Executive Branch attempt, as a
matter of policy, to obtain future water nghts by purchase, exchange, condemnation, or appropriation under state
law. Task Force Report, supra, at 3 -6 This last recommendation was “grounded on the belief that, to the extent
neither existing state law nor existing federal reserved nghts provide an adequate base for federal water needs to
carry out congressionally established management objectives, in some cases a new reserved right might be created
and in other cases a federal non-reserved right might be asserted.” The Task Force urged, however, “that neither
course be followed except where it is absolutely essential to carry out congressionally mandated management
objectives ” Task Force Report at 66-67 The Report did not address in any detail the legal basis for assertion of any
federal non-reserved water rights.
63 Solicitor Krulitz's opinion, in particular, has been the subject of considerable comment. See, e g., The Western
States Water Council, “Response to the Solicitor’s Opinion on Federal Water Rights of June 25, 1979” (Oct 25,
1979); Note, “Federal Nonreserved Water Rights,” 48 U Chi. L. Rev. 758 (1981); F Trelease, “Uneasy
Federalism— State Water Laws and National Water Uses,” 55 Wash. L. Rev 751 (1980); Comment, “Federal Non-
Reserved Water Rights,” 15 Land and Water L. Rev. 67 (1980), Note, “Federal Acquisition of Non-Reserved Water
Rights after New M exico," 31 Stan. L. Rev 885 (1979). Solicitor Coldiron’s opinion has been the subject of at least
one recent comment. See Gould, “Solicitor Rejects Non-Reserved Rights,” 14 Water Law Newsletter No 3 (Rocky
Mountain Mineral Law Foundation 1981).

356
reserved” water rights theory. Dept, of Interior Solicitor’s Opinion No.
M-36914, “Federal Water Rights of the National Park Service, Fish and Wildlife
Service, Bureau of Reclamation and the Bureau of Land Management,” 8 6 1.D.
553(1979) (Krulitz Op.). Solicitor Krulitz did not elaborate on the scope of “con­
gressionally authorized purposes” or “uses,” but his subsequent discussion of the
availability of federal non-reserved water rights under statutes applicable to the
Department of the Interior indicates that he thought those purposes and uses
should be broadly defined.64 Thus, in Solicitor Krulitz’s opinion, there are only
two prerequisites to the existence of a federal non-reserved water right: (1) the
assignment of a land management function to a federal agency, e.g., by statute,
appropriation, legislation, or acquiescence in long-standing administrative inter­
pretation; and (2) the actual application of water to use.
The non-reserved water right asserted by Solicitor Krulitz is both broader and
narrower than the reserved right. It is broader in that it does not depend on a
formal reservation of land, and therefore may arise on public domain and
acquired, as well as reserved, federal lands. In addition, it is not limited to the
specific “primary purposes” for which federal land is managed, but also extends
to any management use or function that is permitted by Congress for the land,
even if such uses are only incidental to the purposes mandated by Congress for
the land, or “secondary,” in the language of the Court in New Mexico. Thus,
under Solicitor Krulitz’s formulation, a federal agency may assert a non-reserved
right for any secondary use of reserved lands (assuming it has reserved rights
covering all primary purposes), and for all permissible uses on acquired and
public domain lands, whether characterized as primary or secondary. In one
respect, however, the non-reserved right is narrower than the reserved right,
because it is based on the appropriation of water to actual use, rather than on a
reservation of land. Thus, the priority date for non-reserved rights is the date the
water was first put to use, and its measure is the amount of water reasonably
necessary for that use. By contrast, reserved rights have priority as of the date of
the reservation, regardless of when or whether the water was put to use, and
extend to all water reasonably necessary for current and future uses. See, e.g.,
Cappaert v. United States, supra, 426 U.S. at 138.
Solicitor Krulitz rested his opinion on an asserted federal proprietary interest
in unappropriated waters in the western states and the federal government’s
superior right under the Supremacy Clause to make use of water in furtherance of
its constitutional powers. See Comment, “Federal Non-Reserved Water Rights,”
15 Land and Water L. Rev. 67, 74—75 (1980). He started with the premise that,
through cession from foreign nations, the United States acquired ownership of
the lands that now comprise the western states and ownership of all rights
appurtenant to those lands, including “ the power to control the disposition and
use of water on, under, flowing through or appurtenant to such lands.” Krulitz
Op. at 563, 575. He asserted that under the Property Clause of the Constitution,
the United States has plenary power to control its property; no interest in that
64 See discussion infra.

357
property may be acquired, by the states or private parties, “ in the absence of an
express grant from Congress . . . Solicitor Krulitz concluded that “absent
that grant or consent, [the property] continues to be held by the United States.” 65
Id. (citing United States v. Grand River Dam Authority, 363 U.S. 229, 235
(1960); Utah Power & Light Co. v. United States, 243 U.S. 389,404-05 (1917)).
Solicitor Krulitz buttressed this conclusion with a Supremacy Clause argument:
Federal control over its needed water rights, unhampered by
compliance with procedural and substantive state law, is support­
ed by the Supremacy Clause and the doctrine that federal ac­
tivities are immune from state regulation unless there is a “ clear
congressional mandate,” or “ specific congressional action,”
providing for state control.
Id. at 564 (citing Kern-Limerick, Inc. v. Scurlock, 347 U.S. 110, 122 (1954));
Paul v. United States, 371 U.S. 245, 263 (1963); Hancock v. Train, 426 U.S.
167, 178-81 (1976); EPA v. State Water Resources Control Board, 426 U.S.
200, 214, 217, 221 (1976).
Under either theory, the conclusion reached by Solicitor Krulitz as to the
applicable legal analysis is the same:
[T]o the extent Congress has not clearly granted authority to the
states over waters which are in, on, under or appurtenant to
federal lands, the Federal Government maintains its sovereign
rights in such waters and may put them to use irrespective of state
law.
Id. at 563. Krulitz concluded that neither the equal footing doctrine66 nor the Acts
of 1866 and 187067 and the Desert Land Act68 constituted the necessary clear
grant of authority over unappropriated waters on federal lands to the states, and
therefore that the federal government may use that water without interference
65 However, Solicitor Krulitz disavowed statements made by a prior Interior Department Solicitor that the United
States is the “ owner of unappropriated non-navigable water on the public domain” as “ broad and irrelevant to the
nght of the United States to make use of such water.*’ He stated that “ concepts of ‘ownership’ of unappropriated
waters are not determinative in federal-state relations in non-reserved water rights.” Krulitz Op. at 613 Solicitor
Krulitz's partial disavowal of the proprietary basis for federal claims is somewhat confusing and seems inconsistent
with his statements that the federal government has a retained “ proprietary interest” m waters not otherwise
appropriated pursuant to state law and “plenary power” over unappropriated waters on federal lands by virtue of the
Property Clause See, e g , id at 563, 575.
66 Solicitor Krulitz concluded that the equal footing doctnne (see p. 15 supra), which is generally relied on to
support state claims of ownership of unappropnated waters, did not divest the United Stales of its ownership interests
in unappropnated waters, because (1) the state acts of admission into the Union contained no express grant of
ownership, such as is required when the United States divests itself of its property rights, and (2) state ownership of
unappropriated water at the time of admission into the Union is “ difficult to square with the reserved rights doctrine
. . . as appl[ied] to reservations of land in a state after statehood.” Krulitz Op. at 564.
67 Solicitor Krulitz interpreted the 1866 and 1870 Mining Acts to waive the United States’ “ proprietary and
riparian nghts to water on the public domain [only] to the extent that water is appropnated by members of the public
under state law . . . .” Krulitz Op. at 565 By negative implication, because the acts did not deal with the federal
government’s rights to use that water, they recognized the United States’ “ inchoate federal water nghts to
unappropnated waters that exist at any point in time ” Id at 565-66
68 Solicitor Krulitz interpreted the Desert Land Act as a statute of limited applicability that “ does not directly
address federal nghts to use water for congressionally authonzed purposes on the federal lands, but instead is aimed
at appropriation and use ‘by the public’” Krulitz Op at 566

358
from the states. Thus, he asserted that by these “ relatively narrow” acts, the
United States did not divest itself of its authority “to use the unappropriated
waters on public lands for governmental purposes.” Id. at 569 (emphasis in
original).
Solicitor Krulitz acknowledged that the language of the Supreme Court in
United States v. New Mexico, supra, that, in the absence of a reserved right
“ there arises the contrary inference that Congress intended federal agencies to
acquire water in the same manner as any other public or private appropriator”
(438 U.S. at 702) makes it unclear whether federal agencies must conform the
assertion of non-reserved federal water rights to state law. He concluded,
however, that the Court could not have intended to suggest that state procedural or
substantive law would control federal non-reserved uses, because requiring
federal agencies to assert non-reserved water rights only for purposes recognized
as beneficial under state law would lead to the “ anomalous result” that federal
land managers would have to manage the same kind of federal land differently in
different states. Rather, he argued that the Court intended only to suggest that
water rights other than those available as reserved rights must be acquired through
some form of appropriation and actual use, and not merely through a reservation
of land. Id. at 576-77.
As a matter of policy, Solicitor Krulitz recommended that federal agencies
comply with procedures established by the states “ to the greatest practicable
extent.” He did not conclude, however, that compliance with state procedural
requirements is required as a matter of law. Id. at 577-78.
In the second portion of his opinion Solicitor Krulitz outlined reserved and
non-reserved federal water rights available to the land management divisions of
the Department of the Interior. He acknowledged that the Taylor Grazing Act and
the Federal Land Policy Management Act (FLPMA) do not create any reserved
rights, but concluded that those statutes express a congressional mandate that the
public domain be managed for multiple use and sustained yield purposes,
including recreational campgrounds, timber production, livestock grazing, and
minimum instream flows necessary to protect and enhance fish and wildlife
resources and scenic values. Therefore, he concluded that the BLM may appro­
priate any water on the public domain necessary to fulfill those purposes. See id.
at 615. With respect to the National Park Service and the Fish and Wildlife
Service, Solicitor Krulitz concluded that those agencies may appropriate (in
addition to water available as reserved rights) all unappropriated water necessary
to fulfill a broad range of consumptive and non-consumptive uses, including,
inter alia, conservation of scenery, natural and historic objects, fish, and wildlife;
provision for public recreation and enjoyment; construction and maintenance of
easements, rights-of-way, and trails; operation of concession operations and
construction of airports in national parks; and management of timber, range,
agricultural crops, and animals in national refuges. Id. at 616-17. Only in § 8 of
the Reclamation Act of 1902 did Solicitor Krulitz find a sufficiently clear
congressional directive to require that water necessary for operation and mainte­
nance of reclamation projects be acquired pursuant to state law. Id. at 615-16.
359
 ii. Martz Opinion
In 1980, Solicitor of the Interior Clyde O. Martz issued a supplemental opinion
dealing with the federal non-reserved water rights theory. See Dept, of the
Interior Solicitor’s Opinion No. M-36914 (Supp.), “ Supplement to Solicitor
Opinion No. M -36914, on Federal Water Rights of the National Park Service,
Fish and Wildlife Service, Bureau of Reclamation and the Bureau of Land
Management,” 8 8 1.D. 253 (1981) (Martz Op.). Solicitor Martz did not disagree
with or disavow Solicitor Krulitz’s analysis of the existence and nature of the
federal non-reserved water rights theory,69 but concluded that no federal non-
reserved water rights could be asserted under FLPMA or the Taylor Grazing Act.
Solicitor Martz noted that FLPMA authorizes a wide range of land management
activities that require the use of water, but concluded that the savings provision in
§ 701(g) of the Act70 indicates that Congress did not intend to provide an
independent statutory basis for claims to water that would be inconsistent with
the substantive requirements of state law. Martz Op. at 257-58. Without discus­
sion, he concluded that “ [t]he same analysis and conclusion is equally applicable
to the Taylor Grazing Act.” Id.1'
iii. Coldiron Opinion
The current Solicitor of the Interior, William H. Coldiron, issued an opinion
on September 11, 1981, concluding that “ there is no federal ‘non-reserved’
water right” and disavowing the Krulitz and Martz opinions to the extent they
asserted that such rights exist. See Dept, of the Interior Solicitor’s Opinion
M -36914 (Supp. I), “Non-Reserved Water Rights— United States Compliance
with State Law,” (Sept. 11, 1981) (Coldiron Op.). Solicitor Coldiron acknowl­
edged that Congress has the power under the Commerce and Property Clauses to
control the disposition and use of water appurtenant to lands owned by the federal
government, and that, under the Supremacy Clause, it is “ unlikely that state law
could preclude reasonable water use by a federal agency if Congress specifies a
69 Solicitor Martz reaffirmed Solicitor Krulitz’s conclusion that situations exist in which the federal government
has a legal basis for asserting a federal right to use water in a manner not conforming to all substantive requirements
of state law, and not available as a matter of a reserved right. “ Federal claims in such cases may be founded on
Federal supremacy if and where clearly mandated by Act of Congress Such claims may also be supported by the
dominion the United States has and continues to exercise over unappropriated waters ansing on the public lands."
M am Op. at 256.
70 Section 701(g) provides, in relevant part:
Nothing in this Act shall be construed as limiting or restricting the power and authority of the United
States or (1) as affecting in any way any law governing appropriation or use of, or Federal right to,
water on public lands; (2) as expanding or diminishing Federal or State jurisdiction, responsibility,
interests or rights in water resource development or control
Reprinted at 43 U S.C. § 1701.
71 Solicitor Martz also noted that the Department of the Interior had previously decided, as a matter of policy, to
refrain from asserting non-reserved nghts, except if specifically approved m individual cases by the Assistant
Secretary or Secretary of the Department, or if the Department was required to submit all claims for water nghts in
litigation. Martz predicted that in the future most federal water rights would be founded on appropriation or
purchase. Martz Op. at 255 n.4.

360
particular federal usage.” Coldiron Op. at 5.72 However, Solicitor Coldiron
observed that Congress can also defer to state control over water resources, and
that therefore the crucial question is whether Congress intended to delegate that
authority to the states.
Solicitor Coldiron analyzed the question of congressional intent in much the
same terms as did the Supreme Court in California v. United States and United
States v. New Mexico—decisions which Solicitor Coldiron concluded “defi­
nitively and directly addressed” the issue of federal non-reserved water rights.
Coldiron Op. at 9. Thus, Solicitor Coldiron interpreted the land management
statutes of the 19th century, the Reclamation Act of 1902, and other public land
use statutes to express congressional recognition of the practical importance of
local control of water resources and a general policy of deference to state water
law. Id. at 6-7. Solicitor Coldiron asserted that only two exceptions have been
recognized to this general deference to state water law: the federal navigation
servitude and the federal reserved right. Id. at 10-11. He concluded, drawing on
language from California and New Mexico, that Congress has given the states
broad power to provide for the administration of water rights, which can be
infringed by the federal government only where necessary to accomplish the
original purpose of a congressionally mandated reservation of land, or to protect
the navigation servitude. Therefore, in analyzing land management statutes, the
presumption should be that “ the United States and its agencies must acquire
water rights in accordance with state substantive and procedural law unless
necessary for the original purpose of a reservation” (or, presumably, unless
incident to the federal government’s navigation servitude). Id. at 12.
Solicitor Coldiron did not address the question of what evidence of con­
gressional intent is necessary to overcome the presumption that state law applies.
He concluded, without an analysis of specific statutory schemes such as that
undertaken by Solicitor Krulitz and Solicitor Martz, that “ there is an insufficient
legal basis for the creation of what has been called federal ‘non-reserved’ water
rights . . . . There is no federal ‘non-reserved’ water right.” Coldiron Op. at 12.
This conclusion suggests that, in Solicitor Coldiron’s opinion, no existing federal
land management statute contains a congressional directive of sufficient speci­
ficity to overcome the presumption of deference to state law, and that, unless and
until Congress enacts statutes specifically authorizing non-reserved rights or
repeals the land management statutes that preserve control over water rights in the
states, the only water rights available to federal agencies outside of state law are
reserved rights or rights necessary to preserve the navigation servitude. Id.

72 Although Solicitor Coldiron’s analysis is rooted primarily in the Supremacy Clause, he also found a basis for
congressional authonty in the United States’ ownership of unappropnated water on the public domain. He suggested
in his opinion that the United States’ power over unappropriated non-navigable water located on the public domain
“ arises from retention of federal property, including the streams and lakes thereon at the time of statehood,” and
charactenzed the pattern of ownership of waters with the western states as follows “ [w]hen the vanous western
states were admitted to the Union, the title to the beds and waters of the navigable streams and lakes passed to the
new states, with the United States retaining title to the non-navigable waters on the public domain.” Coldiron Op.
at S

361
 III. Analysis
A. Constitutional Basis for Federal Claims
1. Congressional authority to preempt state water laws
As a matter of constitutional law, Congress clearly has the power to preempt
state law governing the use and disposition of unappropriated water by federal
agencies on federal lands. That authority arises from the constitutional provi­
sions authorizing the federal government, for example, to regulate interstate
commerce (Art. I § 8), to provide for a common defense (Art. I § 8), to enter into
treaties (Art. II § 2), to manage federal property (Art. IV § 3), and to provide for
the general welfare (Art. I § 8).73 In the exercise of its constitutional authority
under the Commerce, Property, or General Welfare Clauses, or under its treaty
and war powers, Congress has the power to authorize the appropriation of
unappropriated water by federal land management agencies. If Congress exer­
cises that power, by operation of the Supremacy Clause such an exercise preempts
inconsistent state laws. See United States v. Rio Grande Dam & Irrigation Co.,
supra, 174 U.S. at 703; Oklahoma v. Guy F. Atkinson Co., 313 U.S. 508, 534
(1941).
Congress may, for example, authorize a comprehensive interstate plan for
control and disposition of water resources that preempts inconsistent or duplicat­
ing state regulation;74 provide for maintenance of instream flows without regard
to whether such flows are recognized under state law;75 authorize federal agencies
or licensees to divert streams for the construction and operation of hydroelectric
projects without regard to state restrictions on such diversions;76place limitations
or conditions on the use or disposition of water from federal projects that are
inconsistent with state laws governing the use of such water;77 or impliedly
reserve water necessary to carry out specific federal purposes at the time land is
withdrawn from the public domain.78 The question, therefore, is not generally
whether Congress has the power to establish federal rights to unappropriated
water, but whether it has exercised that power. See United States v. New Mexico,
supra, 438 U.S. at 698.
It is important to understand that any water rights that may be asserted by the
federal government outside of state law— whether called reserved, non-reserved,
73 R>r the most part, ihe authorizations to federal agencies that are of concern here are based directly on the
Property Clause, which grants Congress the power “ lo dispose of and make all needful Rules and Regulations
respecting the Territory or other Property belonging to the United States.” Art. IV § 3 cl.2 As we discuss at
pp. 51-56 infra, we believe the proper analytical approach is to consider that the “ property” that is subject lo
federal control in this context is not the unappropriated water arising on federal lands, but the lands themselves. See
generally Kleppe v. New Mexico. 426 U S. 529, 537-39 (1976).
74 See, e.g , Arizona v California, 373 U S. 546 (1963) (Boulder Canyon Project); Oklahoma v. Guy F. Atkinson
Co , 313 U .S. 508, 534 (1941) (navigation and flood control project)
75 See, e g , 16 U S.C. § 557b (prohibiting any “ federal alteration of ihe natural water level of any lake or
stream ” in the Lake Superior National Forest)
76 See, e g., Ashwander v. Tennessee Valley Authority, 297 U S. 288, 350 (1936), First Iowa Coop. v. Federal
Power Com m'n. 32$ U S. 152, 176(1946): Federal Power Com m 'nv. Oregon. 349 U.S. 435, 445 (1955), Tacoma
v. Taxpayers o f Tacoma. 357 U.S. 320, 340 (1958); United States v Grand River Dam Authority. 363 U.S 229,
232-33 (1960).
77 See. e.g . Ivanhoe Irrigation District v. McCracken, 357 U.S. 275 (1958), City c f Fresno v California, 372
U.S 627 (1963); California v United States, 438 U S 645 (1978)
78 See, e.g.. Cappaert v United States, 426 U .S. 128(1976); United States v New Mexico, 438 U.S. 696 (1978).

362
or by some other name—rest on this same constitutional basis. Thus, federal
reserved rights are not a unique species of federal rights that arise directly out of
the reservation of federal lands, so that, absent a reservation of land, no federal
water rights can exist. As one commentator has noted, “the reservation doctrine
is not a source of federal power.” Trelease, “Federal-State Relations,” supra n.6,
at 139 (emphasis added). The reserved right doctrine does not rest on any unique
constitutional basis. Rather:
[t]he federal functions exercised in the name of the reservation
doctrine rest instead on the supremacy clause, coupled with the
power exercised in making the reservation of land, or with some
other power incidentally exercised on the reserved land.
Id.19
Thus the willingness of the Supreme Court to recognize federal reserved rights
does not, under an exclusio unius principle, necessarily preclude the federal
government from asserting in other circumstances water rights not available
under state law or under the reserved right doctrine. The fact that the Supreme
Court has never explicitly recognized a non-reserved water right in haec verba
does not mean that the Court would not recognize the federal government’s
implied rights to unappropriated water, arising from clear congressional intent, in
a situation that has not yet been presented to it.80 As we discuss below, however,
19 Similarly, the navigation servitude, which has been characterized as one of only two “ exceptions” to Congress’
deference to state law (see California v. United States, supra, at 602; Coldiron Op. at 8), is not a unique source of
federal constitutional authority or federal rights. The navigation servitude is a doctrine which holds that the federal
government is not constitutionally required to pay compensation if, in the exercise of its power over navigable
streams, it lakes, destroys, or impairs private property rights that depend on the use or presence of the water. See
United States v. Rands, 389 U.S 121, 122-23 (1967); see generally Trelease, “ Federal-State Relations,” supra
n 6, at 72, 175; E Morreale, “ Federal Power in Western Waters* The Navigation Power and the Rule of No
Compensation,” 3 Natural Resources J 1. 64-65. 74-75 (1963). The navigation servitude stems from Congress*
power to preserve and promote the navigability of waters, which in turn rests on the Commerce Clause. See, e.g.,
Gibbons v. Ogden, 22 U.S. (9 Wheat.) 1 (1824); United States v Rio Grande Dam & Irrigation Co.. 174 U.S 690,
707 (1899); United States v. Grand River Dam Authority, 363 U S. 229, 232-33 (1960) As with other exercises of
constitutional authority, inconsistent state laws, programs, or permit requirements must fall by operation of the
Supremacy Clause See Oklahoma v. Guy F. Atkinson Co . 313 U S. 508, 534-35 (1941), First Iowa Coop v
Federal Power Comm’n, 328 U S. 152, 176(1946) The analysis of federal water nghts under Congress'navigation
power is the same as the analysis of any federal water rights. Has Congress exercised its power under the Commerce
Clause over navigable waters9 If so, what is the scope of the congressional mandate9 Would state law conflict with or
frustrate that mandate?
80 Although the Court has recognized under specific statutes such as the Reclamation Act and the Federal Power
Act that the federal government has certain rights to unappropnated water outside of the reserved right doctnne (see
pp. 31-37 supra), the Court has not addressed directly a broad assertion of federal implied water nghts such as that
asserted by Solicitor Krulitz— i e., that a federal agency may assert a federal water right based solely on the
assignment of land management functions to a federal agency In Nebraska v. Wyoming, 325 U S 589 (1945), an
action between Nebraska, Wyoming, Colorado, and the United States for allocation of water of the North Platte
River, the Court specifically declined to rule on an argument analogous to that made by Solicitor Krulitz. The United
States argued that, given the federal ownership of unappropriated water on federal lands, the federal government
could acquire all water necessary to carry out two reclamation projects using water from the nver regardless of state
law, because “ if the right of the United States lo these water nghts is not recognized [by state law], its management of
the projects will be jeopardized ” 325 U S at 615 The Court declined to rule on that contention, however, as it
found that all necessary rights had been acquired by the United States under applicable law. The Court expressly
reserved decision on the broader claim.
We do not suggest that where Congress has provided a system of regulation for federal projects it
must give way before an inconsistent state system We are dealing here only with an allocation,
through the States, of water rights among appropriators The nghts of the United Slates in respect to
the storage of water are recognized.
Id at 615

363
the reasoning used by the Court in shaping the reserved right doctrine is relevant
to an analysis of what other rights the federal government may have. See
pp. 70-72 infra.
2. “ Ownership” of unappropriated water
Much of the confusion about the federal government’s rights to unappropriated
water in the western states stems from arguments based on “ ownership” of the
unappropriated waters on federal lands and the effect of the land management
statutes of the 19th century. As we outlined supra, Solicitor Krulitz’s assertion of
a broad federal non-reserved water right, while not clearly stated, apparently
rested in part on the assumption that the United States acquired proprietary rights
to all unappropriated water on public lands at the time it acquired the territories
that became the western states, and that it has never subsequently granted away
that proprietary interest except to the extent that private individuals may have
actually appropriated water on those lands. Some of the western states have
argued that the federal government acquired ownership of unappropriated water
together with the public lands, but ceded ownership of the water to the states by
the acts of admission into the Union or at least by the passage of the Desert Land
Act in 1877, or that the federal government never acquired ownership of those
waters.81 The contention is made that the states therefore own those waters and
can exercise control over their use, even if the use is by the federal government.
See, e.g., Morreale, “ Federal-State Conflicts,” supra n.17, at 446-59; Colum.
Note, supra n.5 at 972-74. The only exception to that control is if Congress
withdraws land (and water) from the applicability of those acts by a formal
reservation.
This proprietary view of western water rights has significant ramifications both
for the federal government and the states. As Solicitor Krulitz noted, the
Supreme Court has characterized the federal government’s control over the use
and disposition of its property as “ complete” and “without limitation,” and has
stated that an interest in property of the United States may be acquired only by an
express grant from Congress. See Krulitz Op. at 563; Kleppe v. New Mexico,
supra, 426 U.S. at 539—40; Caldwell v. United States, 250 U.S. 14, 20-21
(1919). Therefore, if the United States “ owns” the water, it may be contended
that all that is necessary to perfect its rights is use of that water for an authorized
federal purpose; a state cannot impose any restrictions on that use unless
Congress has explicitly granted an ownership interest to the states. See Com­
ment, “ Federal Non-Reserved Water Rights,” 15 Land and Water L. Rev. 67, 76
(1980). At the same time, the ownership theory provides a basis for the states’
argument that statehood acts and the federal land acts passed in the 1860s and
1870s (see Part IIB(2) supra ) constituted an express grant of ownership to the
states of all unappropriated water within their borders, and that therefore they

81 See F^rt I1A supra.

364
may now exercise plenary authority over that water.82 If the states own that
unappropriated water, the only way the federal goverment can acquire an interest
in the water is if Congress withdraws certain lands from the scope of the acts,
appropriates water under state law, or acquires existing water rights through
purchase, exchange, or condemnation.
We believe that state and federal claims of title to or ownership of unappropri­
ated water within the western states do not provide an adequate basis for either
denial or assertion of federal water rights. Arguments made on either side of the
issue are difficult to reconcile with the reserved rights doctrine, as it has been
developed by the Supreme Court. With respect to state claims of ownership, the
theory creates substantial questions concerning the constitutionality of the re­
served water rights doctrine. That is, if Congress, either by the statehood acts or
land management statutes, gave the states ownership of all unappropriated waters
on the public domain, on what basis can the federal government reserve some of
that water for a federal use, without compensation, by a withdrawal of land made
after ownership of the waters passed to the states? On the other hand, with respect
to federal claims, the Supreme Court has clearly limited the reserved rights that
the United States can assert to those which are minimally necessary to fulfill the
explicit or necessarily implied congressional intent, and has recognized that the
United States will not, in every instance, have reserved rights to all unappropri­
ated water on federal reserved lands. See United States v. New Mexico, supra,
438 U.S. at 702. If the United States owned all the unappropriated water on the
public domain at the time a particular parcel was reserved and had plenary control
over its disposition, this limitation would appear to be superfluous, and the
Court’s extended analysis of the scope of the reserved right doctrine unnecessary.
Furthermore, it seems anomalous to suggest that an entity can own water that
has not yet been appropriated, if ownership is understood to mean a proprietary
82 Aside from the effect of the Mining Acts of 1866 and 1870 and the Desert Land Act, the western states have also
asserted other theories to support claims of ownership in unappropnated waters within their borders, viz, (1) in the
original thirteen (ripanan) states, the federal government had no interest in water as a sovereign and, therefore,
under the constitutional equal footing doctnne. which guaranteed admission to the western states on an “ equal
footing” with the original thirteen states, the federal government relinquished all claims to water within the new
states, or (2) Congress by the vanous acts of admission impliedly accepted or ratified state constitutional and
statutory provisions asserting the ownership of water Neither theory provides an adequate or consistent basis for
state claims of ownership of unappropriated water Although in California v. United Slates, supra, 438 U S at 654,
the Court noted, without elaboration, that “ [o]ne school of legal commentators held the view that, under the equal-
footing doctrine, the Western States, upon their admission to the Union, acquired exclusive sovereignty over the
unappropnated waters in their stream s,” the Court’s interpretation of the equal footing doctnne in other cases has
been limited In enera, the Court has interpreted the doctnne to apply only to political nghts of sovereignty granted
the original stales, not to property or economic rights. See, e g . , United States v. Texas. 339 U.S 707, 716 (1950)
In Arizona v California, 373 U S 546, 597-98 (1963), the Court rejected the contention that the equal footing
doctnne could limit “ the broad powers of the United States to regulate navigable waters under the Commerce Clause
and to regulate government lands under Art IV, § 3 of the Constitution "See discussion at 2 Clark, supra, § 102 6
The ratification and compact theories also suffer from several deficiencies. Most notably, the language and meaning
of the various constitutional and statutory provisions relied upon by the states vary considerably, as do the admission
procedures followed by the western states It is impossible to construct a coherent theory that would apply to each
state, especially as several of the western states either have no constitutional or statutory provision asserting
ownership or passed such a provision only after admission. The ratification or compact theory would make a state’s
ownership of unappropnated water within its borders turn on the fortuitous language of its constitution and the
circumstances of its admission into the Union As several commentators have noted, the theory therefore provides
little support for state claims of ownership See, e g , Morreale, “ Federal-State Conflicts,” supra n. 17, at 446-55;
Trelease, “ Federal-State Relations,” supra n 6, at 117 n*; Goldberg, “ Interposition— Wild West Water S tyle,” 17
Stan L. Rev 1, 12-16(1964).

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interest in the water. Unappropriated water, much as wild animals, has been
viewed as res nullius— the property of no one— until it has been captured. See F.
Trelease, “ Government Ownership and Trusteeship of Water,” 45 Calif. L. Rev.
638, 643 (1957); Trelease, “Federal-State Relations,” supra n.6, at 147b—i;
Note, “ Federal Nonreserved Water Rights,” 48 U. Chi. L. Rev. 785, 770-71
(1981). In Hughes v. Oklahoma, 441 U.S. 322 (1979), the Supreme Court noted
that concepts of ownership of or title to natural resources such as natural gas,
minerals, landfill areas, birds, fish, and other wildlife is a “legal fiction” that
merely expresses legitimate state regulatory interests in the conservation and
protection of its natural resources:
The whole ownership theory, in fact, is now generally regarded as
but a fiction expressive in legal shorthand of the importance to its
people that a State have power to preserve and regulate the
exploitation of an important resource.
441 U.S. at 334, quoting Toomer v. Witsell, 334 U.S. 385,402 (1948). The Court
made it clear that a state’s power over wild animals, as over other natural
resources, is based on the state’s police powers and is subject to ordinary
constitutional limitations—in that case, the Commerce Clause.83
Thus, claims of ownership of natural resources by the states or by the federal
government are best understood as claims of regulatory jurisdiction over those
resources, either under the states’ police powers or under the federal govern­
ment’s constitutional powers. See Kleppe v. New Mexico, 426 U.S. 529, 537
(1976) (ownership of wild horses and burros on federal lands is irrelevant to the
scope of the federal government’s authority under the Property and General
Welfare Clauses to protect those horses and burros). This interpretation of the
nature of the states’ and federal government’s interests in unappropriated water is
consistent with the approach taken by the Supreme Court in cases involving the
use or disposition of water in the western states. The Court has consistently
analyzed claims by the states and the federal government over navigable and non-
navigable waters as a question of competing regulatory authority, rather than as a
question of property rights.84 See, e.g., United States v. Rio Grande Dam &
Irrigation Co., supra, 174U.S. at 703; Wintersv. UnitedStates, supra, 207U.S.
at 577; Arizona v. California, supra, 373 U.S. at 597-98; California v. United
States, supra, 438 U.S. at 665—79; United States v. New Mexico, supra, 438
83 In H ughes v. Oklahoma, the Court overruled Geer v. Connecticut, 161 U S 519 (1896), which had sustained
against a Commerce Clause challenge a Connecticut statute forbidding the transportation beyond the state of game
birds that had been lawfully killed within the state The Court’s decision in Geer rested on its conclusion that no
interstate commerce was involved, because the state had the power as representative for its citizens, who owned all
wild animals within the state, to control both the taking and ownership of game that had been lawfully reduced to
possession in the state. See 441 U.S at 322. In Hughes, the Court noted that the Geer rationale had been
considerably eroded and limited in subsequent decisions dealing with state authority over other natural resources
See 441 U.S at 329-335. faced with an Oklahoma statute prohibiting the transport or shipping outside the state of
minnows procured from waters within the state, the Court explicitly overruled the holding in Geer, and concluded
that the Oklahoma law unconstitutionally interfered with interstate commerce Id.
84 In several cases in which the Court has been faced with claims of “ ownership” of the unappropnated waters by
the states or the federal government, it has refused to address the question, and found a narrower ground for its
decision. See. e g . Ickes v Fox, 300 U S. 82, 96 (1937); Nebraska v Wyoming, 325 U.S 589, 615-16 (1945)

366
U.S. at 698. While some of these decisions made reference to the Property
Clause, in each instance federally owned land was at the center of the controver­
sy, and the references made to the Property Clause may be best understood as
relating to an exercise of power over that property. The Court made the distinction
between ownership and regulatory jurisdiction clear in a slightly different context
in United States v. California, 332 U.S. 19, 36 & n.20 (1947). In that case, the
Court found that California does not hold title to submerged lands off its coast by
virtue of the equal footing doctrine, but that California could nonetheless
exercise police powers over waters flowing over that land, limited by constitu­
tional constraints such as the Commerce Clause or the war power. See id.
The question is not one of competing ownership, therefore, but of competing
regulatory jurisdiction. As one commentator has noted:
The state and federal governments share an interest in proper
regulation of water. Neither “ owns” unappropriated water but
each has the power to use it and to regulate its use . . . . The
important question is whether state or federal rules of capture
apply to the United States. In other words, the issue is whether
Congress has established a federal regulatory jurisdiction over
federal appropriations, or has recognized the inherent regulatory
jurisdiction of the states and adapted federal programs to it.
Note, “ Federal Nonreserved Water Rights,” 48 U. Chi. L. Rev. 758, 772 (1981)
(footnotes omitted).
3. Effect of Mining Acts of 1866 and 1870 and the Desert Land Act
The major 19th century land acts—the Mining Acts of 1866 and 1870 and the
Desert Land Act of 1877 (see pp. 18-21 supra )— can thus best be understood as
an allocation of jurisdiction to regulate the use of unappropriated water on federal
lands between the states and the federal goverment, rather than a conveyance of
property interests in that water. See Trelease, “ Federal-State Relations,” supra
n.6, at 147; Morreale, “ Federal-State Conflicts,” supra n.17, at 432. Since
Congress has the power to cede its constitutional authority over federal uses of
such water to the states, the question is whether those acts divested the federal
government of that authority.85
The Supreme Court’s treatment of those acts, particularly the Desert Land Act,
has been ambiguous and far from definitive. In California Oregon Co. v. Beaver
85 At one time the Justice Department took the position that Congress could not provide for state administration of
federal property rights because to do so would be in contravention of Article IV, § 3 of the Constitution and the
separation of powers principle See Letter of Deputy Attorney General William P. Rogers to Sen. James E. Murray,
Chairman, Senate Committee on Interior and Insular Affairs, dated March 19, 1956, reprimedin S. Rep N o .2587,
84th Cong , 2d Sess. 25 (1956) This Office has since rejected that position. See Memorandum for James W
Moorman, Assistant Attorney General. Land and Natural Resources Division, from Larry L. Simms. Deputy
Assistant Attorney General, Office of Legal Counsel (Jan 22, 1980), at 13 n 10 As we stated in that memorandum,
“ [t]he Supremacy Clause charges the States with protecting federal rights and, other than sovereign immunity
limitations, we perceive no constitutional or common law limitations on state administration of those rights ” See
generally United States v New Mexico, 438 U S. 696 (1978); California v United States, 438 U.S. 645 (1978)

367
 Portland Cement Co., supra, for example, the Court stated that, “ [the Desert
Land Act] . . . recognizes and gives sanction, in so far as the United States and
its future grantees are concerned, to the state and local doctrine of appropria­
tion.” 295 U.S. at 164 (emphasis added). Even if that language could be
interpreted as an unambiguous statement that the Desert Land Act applies to
federal uses, the case involved only competing claims by private parties, not
claims by the federal government, and the Court’s statement must be regarded as
dictum. See pp. 21-22 supra. In the Pelton Dam decision, which did involve, at
least indirectly, claims by the federal government (i.e., through its licensee), the
Court characterized the Desert Land Act as severing, ‘for purposes of private
acquisition, soil and water rights on public lands.” Federal Power Commission v.
Oregon, supra, 349 U.S. at 448 (first emphasis added; second emphasis in
original). Again, however, the Court’s statement is not definitive, because the
Court refused to rule on the general question of the effect of the Desert Land Act
or the 1866 and 1870 Acts on a state’s exercise of jurisdiction over unappropriated
water within its borders, holding only that the acts do not apply to federal
reserved lands.86 Id. In Cappaert v. United States, supra, the court characterized
the Desert Land Act as “ provid[ing] that patentees of public land [i.e., private
purchasers or grantees] acquire only title to land through the patent and must
acquire water rights in nonnavigable water in accordance with state law.” 426
U.S. at 143. Although that characterization appears to limit the effect of the Act
(and, by implication, the preceding Mining Act of 1866 and 1870) to rights that
may be acquired by private appropriators,87 the Court rested its holding, as in the
Pelton Dam decision, on the inapplicability of the Act to federal reserved lands.
Id. at 144 & n.9.
Although the issue is not free from doubt, we believe that the sounder view is
that the Mining Acts and Desert Land Act authorize state control only over
appropriations by private individuals of unappropriated water on federal lands,
and do not, by their terms, cede to the states control over the federal government’s
use of water for federal purposes and programs. That interpretation is suggested
by the Supreme Court’s language quoted above from the Pelton Dam decision and
Cappaert v. United States. Moreover, it is consistent with the legislative back­
ground and history of the Acts. At the time the Mining Acts and Desert Land Act
were passed, the concern at the state and federal level was not with possible
federal-state conflicts over the use of water on the public lands, but rather with
settlement of private disputes between private claimants. See generally 2 Clark,
supra, § 102.5. The somewhat sparse legislative history of the acts suggests that
the primary— if not the only— contemplated purpose of provisions of the acts
dealing with water rights was to clarify that private patentees or users of federal
lands would not acquire, by virtue of that ownership or use, any rights to
86 In Federal Power Comm’n v. Oregon, supra, the state argued that the 1866, 1870, and 1877 legislation
constituted express congressional conveyances to the states of the power to regulate the use of non-navigable waters
The Supreme Court found it unnecessary “ to pass upon the question whether this legislation constitutes the express
delegation or conveyance of power that is claimed by the State, because these Acts are not applicable to the reserved
lands and waters here involved.” 349 U S. at 448.
B7 See Cappaert v United States, supra, 426 U S. at 143 n.8.

368
unappropriated water except as recognized by state law. See generally Grow &
Stewart, supra n.36, at 468-69.88
It was not until the end of the 19th century that federal users of water within the
western states began to be of major concern. In United States v. Rio Grande Dam
& Irrigation Co., supra, one of the first cases to discuss a federal-state conflict
over the use of water resources within those states, the Court noted that the
Mining Acts and Desert Land Act must be interpreted “ in the light of existing
facts,” i.e.:
. . . that all through this mining region in the West were streams,
not navigable, whose waters could safely be appropriated for
mining and agricultural industries, without serious interference
with the navigability of the rivers into which those waters flow.
And in reference to all these cases of purely local interest the
obvious purpose of Congress was to give its assent, so far as the
public lands were concerned, to any system, although in con­
travention to the common-law rule, which permitted the appropri­
ation of those waters for legitimate industries. To hold that Con­
gress, by these acts, meant to confer upon any state the right to
appropriate all the waters cf the tributary streams which unite
into a navigable water course, and so destroy the navigability of
that water course in derogation cf the interests cfall the people cf
the United States, is a construction which cannot be tolerated. It
ignores the spirit of the legislation, and carries the statute to the
verge of the letter, and far beyond what, under the circumstances
of the case, must be held to have been the intent of Congress.
174 U.S. at 706-07 (emphasis added). The Court clearly affirmed that the intent
of the Mining Acts and the Desert Land Act was to deal with issues of local
concern— i.e., private appropriations—and not to interfere with Congress’ supe­
rior right, in the exercise of a constitutional power such as that over navigation, to
use water within the western states.89See, e.g., Colum. Note, supra n.5, at 980.
We believe the conclusion that the acts by their terms do not cede regulatory
authority over federal uses to the states is consistent with the Supreme Court’s
holding in the Pelton Dam decision that the acts do not apply to federal reserved
lands. In the Pelton Dam decision, the Court rested its conclusion on its
88 In particular, it is difficult to construe the Desert Land Act as ceding the federal government’s control over its
use of water on federal lands in the 17 western states, because the Act does not apply to all 17 states or to navigable
waters within those states See n 38 supra
89 This part of the Court’s holding in Rio Grande cannot be dismissed as dealing only with the federal
government’s power over navigable waters and therefore inapplicable to the Desert Land Act, which applied by its
terms only to non-navigable waters. As we noted supra at n.79, the federal government’s authority to preserve the
navigability of streams is not a source of federal power, but rather an example of federal power that can be exercised
under the Commerce Clause Therefore, the Court’s comments would be equally applicable if some other
constitutional power— for example the Property or General Welfare Clauses— were the basis of the United States’
attempt to enjoin diversion of the nver by private appropriators. In any event, the Court’s comments were directed
not at state-approved diversions of navigable waters, but state-approved diversions of non-navigable waters, waters
that are clearly within the scope of the Desert Land Act

369
interpretation of the term “public lands” in the Desert Land Act to include only
public domain lands— i.e., those open for settlement and disposition. See p. 27
supra. The Act therefore did not apply to reserved lands. At the time of the
Court’s decision, because the federal reservation in question had been made
subsequent to passage of the Act, the relevant public domain was not the public
domain as of the time the Act was passed, but the public domain as of 1954. The
Court’s decision has consistently been interpreted to mean therefore that the
federal government can withdraw unappropriated water from the state appropria­
tion system at any time by withdrawing appurtenant lands from the public
domain for a particular federal purpose. See, e.g., Cappaert v. United States,
supra, 426 U.S. at 145; Morreale, “ Federal-State Conflicts,” supra n.17, at
432.
The basis upon which the federal government can make such a withdrawal is
not clear from the Court’s discussion in Federal Power Commission v. Oregon,
349 U.S. 435 (1955). Commentators have suggested that the appropriate analysis
is repeal-by-implication. The argument is that, although Congress granted the
states plenary authority over unappropriated water within their borders by the
1866, 1870, and 1877 Acts (including authority over federal uses), the subse­
quent reservation of land for a specific federal purpose impliedly repeals those
acts to the extent of the water rights involved. See, e.g.. Grow & Stewart, supra
n.36, at 466-67. That argument is subject, however, to the serious objection that
implied repeals are highly disfavored, particularly as many reservations may be
made simply by executive order or administrative action. See, e.g., TVA v. Hill,
437 U.S. 153, 189-90 (1978); C. Sands, Statutes and Statutory Construction,
§ 23.09 (4th ed. 1973). We believe that the more tenable explanation is that the
Acts gave the states authority only to control and administer private rights to
water on federally owned lands, and did not grant away the federal government’s
power, if properly and clearly exercised, to use unappropriated water on federal
lands without regard to state law. The significance of a reservation of land from
the public domain is not that it repeals the effect of the Mining Acts or Desert
Land Act, but that it is an exercise by Congress of that power and therefore, by
reason of the Supremacy Clause, preempts inconsistent state control of federal
uses.
B. Statutory Basis for Federal Claims
Although we do not believe that Congress ceded its regulatory authority over
federal use of unappropriated water on federal lands to the western states by the
Mining Acts and the Desert Land Act, Congress clearly recognized and indeed
fostered, by those acts and subsequent land management statutes, the develop­
ment of comprehensive state water codes and administrative systems applicable
to unappropriated water on federal, as well as privately or state-owned land. It is
clear that federal law may displace those state systems, however, at least with
respect to unappropriated water on federal lands. See, e.g., United States v. Rio
370
Grande Dam & Irrigation Co., supra. What is not clear—and what we address
here— is when and how federal law displaces state water law.
Because Congress has seldom directly regulated the acquisition or use of water
by federal agencies or their licensees,90 and has not enacted comprehensive
legislation dealing with federal water rights in the western states,91 the federal
state conflicts that are of primary concern are conflicts between federal uses of
water for the management of federal lands and state substantive or procedural
law. For example, state law may not recognize certain federal uses as beneficial or
in the public interest92 or may deny a priority date to a federal use because of the
90 Exceptions include certain provisions of the reclamation laws, such as § 5 and § 8 of the Reclamation Act of
1902 and § 9 of the Reclamation Project Act of 1939, which prescribe terms upon which the Secretary of the Interior
can use or dispose of water from federal reclamation projects {see pp. 22-23 supra); § 9 of the Rivers and Harbors
Act of 1899, 33 U.S C. § 401, which requires the consent of Congress to construct dams and other obstructions on
navigable waters, and the Federal Power Act, supra n.28, which provides for licensing of hydroelectric dams on
navigable and some other waters {see p 23 supra).
91 In the last 30 years, a number of “ water nghts settlement bills” have been introduced into Congress but have not
been passed. For the most part, these bills would have given the states considerable control over federal uses of
unappropriated water The “ Barrett bill,” introduced in 1956, for example, would have provided that:
[A]ll navigable and non-navigable waters are hereby reserved for appropriation and use of the public
pursuant to State law, and rights to the use of such waters for beneficial purposes shall be acquired
under State laws relating to the appropriation, control, use, and distribution of such waters. Federal
agencies and permittees, licensees, and employees of the Government, in the use of water for any
purpose in connection with Federal programs, projects, activities, licenses, or permits, shall, as a
condition precedent to the use of any such water, acquire rights to the use thereof in conformity with
State laws and procedures relating to the control, appropriation, use, or distnbution of such water.
S 863, 84th Cong , 2d Sess § 6 (1956), reprinted in Morreale, “ Federal-State Conflicts,” supra n.17, at 514
The “ Kuchel bill,” introduced in the 88th Congress, provided that
Any right claimed by the United States to the beneficial diversion, storage, distribution, or
consumptive use of water under the laws of any State shall be initiated and perfected in accordance
with the procedures established by the laws of that State.
S. 1275, 88th Cong., 1st Sess § 3 (1962), reprinted in Morreale, “ Federal-State Conflicts,” supra n. 17, at 494.
Sponsors of bills granting control over water resources to the states generally have argued that such provisions
would merely “ confirm” the status quo. See id at 446. Hearings were held on various aspects of federal-state
relations in the field of water rights in 1950, 1956, 1960-61, and 1964. See Water Rights Settlement Act: Hearings
on S 863 Before the Subcomm on Irrigation and Reclamation c f the Senate Comm, on Interior and Insular Affairs,
84th Cong., 2d Sess. (1956); Water Rights Settlement Act c f 1956. Hearings Before the House Comm, on Interior
and Insular Affairs, 84th Cong , 2d Sess (1956); Federal-State Relations in the Field o f Water Rights: Hearings
Before the Subcomm on Irrigation and Reclamation c f the House Comm on Interior and Insular Affairs, 86th
C ong., 1st Sess (1959), Federal-State Water Rights: Hearings Before the Senate Comm, on Interior and Insular
Affairs, 87th Cong., 1st Sess. (1961), Federal-State Water Rights• Hearings on S. 1275 Before the Subcomm. on
Irrigation and Reclamation c f the Senate Comm, on Interior and Insular Affairs, 88th Cong , 2d Sess. (1964) Fora
detailed discussion of vanous water nghts settlement bills, see Morreale. “ Federal-State Conflicts,” supra n. 17,
and 2 Clark, supra. § 107.
In 1973, the National Water Commission proposed a “ National Water Rights Procedure A ct,” which would have
required federal agencies to proceed in conformity with state laws and procedures relating to the appropriation or use
of water and the administration and protection of water nghts, except “ where state law would conflict with the
accomplislynent of the purposes of a federal program or project ” The Act would also have established a procedure
for recording and quantifying existing non-Indian federal water uses and would have eliminated the non­
compensation features of the reserved right doctnne and the navigation servitude See National Water Commission,
Water Policies fo r the Future (Water Information Center, Inc. 1973), at 461-64.
92 The Forest Service has expressed concern in the past, for example, that it might not be able to obtain stale
recognized nghts for certain instream or in-situ uses such as livestock watenng, recreation, or preservation of fish
and wildlife, because applicable state law requires a diversion of water or does not recognize such uses as beneficial
See Department of Agnculture Position Statement, submitted to Office of Legal Counsel on Nov. 5, 1981. An
analogous problem has been identified by the Department of the Army with respect lo water rights available for Fort
Carson, in Colorado, which is located on acquired federal lands Concerns have been raised by the Army that
Colorado law would nol recognize the uses of water for military training and emergency preparedness. See
Department of the Army, Legal Memorandum, “ Federal Non-Reserved Water Rights” (Nov. 5, 1981).

371
failure of the agency to comply with state procedural or permitting require­
ments.93 The question, therefore, is whether, by authorizing certain uses of
federal lands, Congress intended also to authorize acquisition of water for those
uses without regard to limitations imposed by state law. As the Supreme Court
commented in New Mexico with respect to federal reserved rights, this “ is a
question of implied intent and not power.” 438 U.S. at 698 (emphasis added).
Under the federal non-reserved right theory articulated by Solicitor Krulitz,
the requisite intent to displace state control over the appropriation of unappropri­
ated water could be inferred merely from Congress’ authorization to federal
agencies to manage federal lands; no specific congressional intent to displace
state control over water would need to be shown. Thus, for example, a federal
agency would be entitled to water necessary for preservation of minimum
instream flows for stock watering, recreation, and fish and wildlife purposes
whether or not state law recognized such uses as beneficial, and would not be
bound by state permitting or other procedural requirements, so long as the agency
was acting within its congressionally mandated authority. The contrary view is
that, unless Congress has set specific conditions on the acquisition or use of water
by federal agencies or has reserved the underlying land, federal agencies are
limited to water rights obtainable under state substantive and procedural law. If,
for example, applicable state law does not recognize minimum instream flows,
Congress has not explicitly recognized a federal right to those flows, and the
agency cannot claim an implied reserved right to such flows because the underly­
ing land was not reserved from the public domain or the use is not a primary
purpose of a reservation, the agency is not entitled to that water.94 Similarly,
except when the agency may be able to assert reserved rights (which have a
priority date based on the date the land was reserved), the priority date of its water
rights must be established in accordance with state substantive arid procedural
law.
As both Solicitor Krulitz and Solicitor Coldiron recognized, the Supreme
Court’s decisions in California v. United States and United States v. New Mexico
are highly relevant to an analysis of the federal non-reserved water rights theory,
both because those decisions are the most recent pronouncements of the Supreme
Court on federal rights to unappropriated water in the western states and because
the Court suggested in those opinions that there may be limitations on the federal
government’s ability to acquire or use water on federal lands without complying
with applicable state laws. It is important to understand, however, that the
93 In many cases federal agencies have failed to apply for permits recognizing state appropriative nghis at the time
the water was first put to use because of inadvertence, policy decisions, or legal advice In “ permit” states, which
award priority based on the date an application is filed, those agencies nsk having their nghts cut off by a junior
appropriator who has complied with state procedural requirements. Assertion of federal non-reserved nghts, if
sustained, would allow the federal agencies to antedate their water rights— i e., to get the benefit of a prionty date
based on the first actual use of the water
94 The western states have argued that in those states that do not recognize minimum instream flows, the flows may
nevertheless be preserved by the acquisition (by purchase or condemnation) and exercise of senior downstream
state-awarded water rights, which will ensure the continued upstream flows. See Memorandum to Theodore B.
Olson, Assistant Attorney General, Office of Legal Counsel, from the Honorable Mike Greely, Attorney General,
State of Montana (Apr 1, 1982).

372
holdings in those decisions were relatively narrow, limited to the effect of § 8 of
the Reclamation Act of 1902 (California v. United States) and the scope of the
Forest Service’s reserved rights under its Organic Administration Act (United
States v. New Mexico). Unfortunately, much of the debate about the meaning of
California and New Mexico focuses on isolated language used by the Court,
which is interpreted by critics of the non-reserved right theory to preclude
assertion of any federal non-reserved rights and by proponents of the theory as
limited to the narrow holdings in the cases before the Court. As we discuss now,
both interpretations of the Court’s language are selective and do not provide an
entirely satisfactory rationale for either conclusion.
Critics of the non-reserved right theory argue that, in the following three
passages from California and New Mexico, the Court definitively disposed of the
contention that any federal non-reserved water rights exist:
The Court noted [in United States v. Rio Grande Dam & Irriga­
tion Co.] that there are two limitations to the State’s exclusive
control of its streams—reserved rights “ so far at least as may be
necessary for the beneficial uses of the government property,”
and the navigation servitude. The Court, however, was careful to
emphasize with respect to these limitations on the States’ power
that, except where the reserved rights or navigation servitude of
the United States are invoked, the State has total authority over its
internal waters.
California v. United States, supra, 438 U.S. at 662 (citations omitted).
Where water is only valuable for a secondary use of the reserva­
tion . . . there arises the contrary inference that Congress intend­
ed, consistent with its other views, that the United States would
acquire water in the same manner as any other public or private
appropriator.
United States v. New Mexico, supra, 438 U.S. at 702.
[T]he “ reserved rights doctrine” is a doctrine built on implication
and is an exception to Congress’ explicit deference to state water
law in other areas.
Id. at 715.
None of these statements, however, can be interpreted as conclusively as critics
of the non-reserved rights theory urge, when read in context.95 In the language
95 Solicitor Coldiron concluded in his opinion that “ this issue of ‘non-reserved’ federal water rights was
definitively and directly addressed on July 3, 1978, by the Supreme Court in two separate opinions regarding the
water nghts of the United States [United States v New Mexico and California v. United States] " Coldiron Op at 9.
The western states, relying primarily on the “ contrary inference” language from New Mexico, argue that “ New
Mexico dictates that when the federal government claims water for a national forest (assuming the navigation
servitude does not apply), it has only two mechanisms available to it. the reserved nghts doctnne or the law of the
state in which the reservation is located ” See Memorandum to Theodore B. Olson, Assistant Attorney General,
Office of Legal Counsel, from the Honorable Mike Greely, Attorney General of Montana (Apr 1, 1982) at 8-9

373
quoted from California, for example, the Court was merely characterizing its
holding in the Rio Grande case.96 The Court clearly recognized in the remainder
of its opinion that there may be circumstances other than the navigation servitude
or reserved rights doctrine under which a federal statute would preempt the state’s
exclusive control of its stream— i.e., if conditions imposed by state law on the
operation or construction of a federal reclamation project are “ inconsistent with
clear congressional directives respecting the project.” See 438 U.S. at 672.
Consequently, the Court could not have intended, by that language, to establish a
rule of law applicable to all water rights that could be asserted by the federal
government.
Likewise, the often-cited language in New Mexico that a “ contrary inference”
arises that the United States must acquire water “ in the same manner as any other
public or private appropriator,” if reserved rights are not available, must be
considered in context. The only issue before the Court in New Mexico was the
scope of the Forest Service’s reserved rights under its Organic Administration
Act.97 The Court did not have before it any argument or evidence relevant to
rights that might have been asserted by the Forest Service on some other basis,
such as appropriation under state law, or relevant to rights arising on public
domain lands. Thus, the Court’s statement about the ability of the Forest Service
to obtain water in excess of its reserved rights was made only in the context of
federal reserved lands; as we discuss infra, even with respect to reserved lands it
can be argued that the language does not mean that federal agencies are neces­
sarily bound by state law in acquiring water necessary only for “ secondary” uses
of the land. See p. 68 infra.
Finally, the Court’s characterization of the reserved rights doctrine as an
“ exception” to Congress’ explicit deference to state water law in other areas does
not imply that reserved rights are the only exception. The Court clearly recog­
nized in California, as we have discussed, that other exceptions may exist. See
Part IIB(3)(b) supra.
While we believe that these selected passages from California and New Mexico
do not therefore definitively dispose of the federal non-reserved water rights
theory, we believe that they reflect the Court’s view and its interpretation of
Congress’ intent over the years that substantial deference will be accorded to state
water laws. We do not believe, therefore, that the decisions should be read as
narrowly as has been suggested by proponents of the non-reserved theory.
Solicitor Krulitz, for example, argued that when the Court suggested in New
96 Arguably, this construction mischaracterizes the scope of the language used in Rio Grande, which was that a
state cannot “ destroy the right of the United States, as the owner of lands bordering on a stream, to the continued
flow of its waters; so far at least as may be necessary for the beneficial uses of the government property.,, 174 U S. at
703. It was not until nine years later, in Winters v. United States, supra, that the Court first used the term “ reserved”
rights to describe federal water nghts furtherm ore, the Court’s holding in Rio Grande rested on the federal
government’s navigation power under the Commerce Clause Hence its holding is somewhat narrower than was
descnbed in California v. United States.
97 The Court defined the question before it as “ what quantity of water, if any, the United Stales reserved out of the
Rio M imbres when it set aside the Gila National Forest in 1899“ 438 U S at 698. The bnefs before the Court dealt
only with the scope of reserved rights available under the Forest Service’s Organic Administration Act, no evidence
or argument was advanced to indicate that the Forest Service would not be able to acquire water necessary for the
management of the national forests under applicable state law, if it did not have reserved rights to that water.

374
Mexico that, absent a reserved right the Forest Service should acquire water rights
“ in the same manner” as other appropriators, it intended only to draw a
distinction between the rights that could be obtained by a reservation of land
(which have priority as of the date of the reservation and are measured by
reasonable present and future uses of the land) and rights obtained by appropria­
tion (which have priority as of the date of actual use and are measured by the
extent of that use). That is, when the Court stated that federal agencies must
acquire water for secondary uses of federal reservations “ in the same manner” as
other appropriators, it meant only that the right must be acquired through
“ appropriation,” or actual use of the water, rather than by “ reservation” of the
land. If a federal agency had actually appropriated water to fulfill an authorized
agency function, Krulitz concluded that the Court would not hold that a state, by
application of its substantive or procedural law, could deny a right to that water to
the agency. See Krulitz Op. at 577.
While there is evidence to suggest that the Court was concerned with the
possibility that reserved rights could cut off the rights of private appropriators
because of their senior priority date,98 we believe that the Court intended “ in the
same manner as any other public or private appropriator” to mean “under
applicable state law.” On three occasions, the Court referred expressly to
congressional intent that water be acquired under state law. In the sentence
immediately following the language quoted above, for example, the Court
remarked that “Congress indeed has appropriated funds for the acquisition under
state law of water to be used in federal reservations.” 438 U.S. at 702 (emphasis
added). Similarly, the Court noted that “ [t]he agencies responsible for admin­
istering the federal reservations have also recognized Congress’ intent to acquire
under state law any water not essential to the specific purposes of the reserva­
tion,” and that “ the ‘reserved rights doctrine’ is a doctrine built on implication
and is an exception to Congress’ explicit deference to state water law in other
areas.” Id. at 703, 715 (emphasis added). Thus, the most logical reading of the
Court’s language is that water that is not necessary to carry out the particular
primary purposes mandated by Congress for the federal reservation in question
must be acquired in compliance with applicable state substantive and procedural
law.99
With respect to the effect of California v. United States, Solicitor Krulitz
argued that the Court’s recognition that state law must fall if “ inconsistent” with
congressional directives supports the federal non-reserved rights theory. Krulitz

98 The Court noted that “ (wjhen, as m the case of the Rio Mimbres, a nver is fully appropriated, federal reserved
water rights will frequently require a gallon-for-gallon reduction in the amount of water available for water-needy
state and private appropriators" and suggested that “ [t]his reality has not escaped the attention of Congress and must
be weighed in determining what, if any, water Congress reserved for use in the national forests ” 438 U.S al 705
99 It could be argued that the Court meant only that federal agencies should comply with state procedural law in
the filing of claims or applications for water nghts, but would not be bound by limitations imposed by state
substantive law on water nghts to carry out secondary uses of the reservation. The Court did not, however, draw any
distinction between substantive and procedural law in its discussion. Moreover, the Court rejected a similar
argument in California v United States with respect to the language of § 8 of the Reclamation Act, stating that
limiting the effect of § 8 to compliance with only the form of state water law “ would tnviahze the broad language
and purpose of § 8.” 438 U S. at 675

375
 Op. at 576. This argument requires that we construe the mere assignment of a
land management function or delegation of responsibility for construction and
operation of a federal project to a federal agency as a “ congressional directive”
within the Court’s meaning. If so, any state laws or conditions that would prohibit
the acquisition of water to carry out those responsibilities would fall.
Because the Court in California remanded the proceedings for a determination
of whether the conditions imposed by California on the New Melones Dam
would be “ inconsistent” with authorization of the dam, it is difficult to speculate
as to the type of conditions the Court would have found impermissible. Plainly, if
a state-imposed condition would make the entire project impossible, it would be
struck down. See First Iowa Cooperative v. Federal Power Commission, 328
U.S. 152 (1946). If Congress specifically authorized construction of a dam of a
certain size, placed express conditions on the use of water from the dam, or
prescribed particular uses or purposes of the project, it is relatively clear that
state-imposed conditions that are inconsistent with those provisions would be
preempted. See, e.g., California v. United States, supra, 438 U.S. at 669 n.21;
Ivanhoe Irrigation District v. McCracken, supra, and City of Fresno v. Califor­
nia, supra. However, we do not believe the Court intended that any conditions
that might interfere with construction or operation of the project must fall. Such
an interpretation would be inconsistent with the Court’s analysis in New Mexico,
in which the Court contemplated that state law might control some aspects of the
operation of federal lands. We believe that, read in context and in light of New
Mexico, the Court contemplated in California that “ inconsistent” state condi­
tions include those, for example, that would conflict with explicit statutory
provisions directing a federal agency to acquire or dispose of water under certain
conditions or limitations (such as the provisions of the reclamation laws dis­
cussed in Ivanhoe, Fresno, and Arizona v. California), conditions, or specifica­
tions established by Congress in the authorizing legislation for a federal project,
or conditions that would entirely frustrate the purposes for which the project was
authorized. This leaves open the possibility, for example, that the state may place
conditions on secondary, or incidental, features of the project, or may impose
conditions, for state purposes, that do not frustrate the specific federal purposes
for which the project or management of the lands was authorized.
The primary importance of the Court’s decisions in California and New
Mexico to the federal non-reserved right theory lies in the Court’s mode of
analysis, particularly in the significance attributed by the Court to Congress’
history of deference to state water law. As we discussed above, the constitutional
basis for federal water rights, however denominated, is the Supremacy Clause
coupled with a proper exercise of federal authority. Therefore the issues ad­
dressed by the Court in California and New Mexico are precisely those which
must be addressed whenever federal water rights are asserted, whether the
asserted rights arise under the Reclamation Act of 1902, the Forest Service’s
Organic Administration Act, or some other federal land management statute. The
issues are (1) in an exercise of a constitutional grant of power, did Congress
intend to preempt state laws governing the acquisition and use of unappropriated
376
water within the western states? and (2) if so, what is the scope of that
preemption?
The Supreme Court made it clear in California and New Mexico that the
existence of federal water rights depends on a finding of congressional intent to
preempt state water law. That congressional intent cannot be analyzed without
consideration of Congress’ overall role in the development of water law in the
western states and the importance to the western states of control over scarce
water resources. The Court found the most significant aspect of Congress’ role to
be a negative one— i.e.. Congress’ general deference to and acquiescence in the
development of comprehensive water codes by the western states. For example,
in California the Court interpreted the Reclamation Act of 1902 not only in light
of its unique legislative history, but also in light of “ the consistent thread of
purposeful and continued deference to state water law by Congress.” 438 U.S. at
653. In New Mexico, both the majority and the dissent agreed that the determina­
tion of reserved rights under a particular statutory scheme, such as the Forest
Service’s, requires a “ careful examination” of the asserted right and the specific
purpose for which the land was reserved, “ both because the reservation [of water]
is implied, rather than expressed, and because of the history of congressional
intent in the field of federal-state jurisdiction with respect to allocation of water.”
438 U.S. at 701-02; see also id. at 718 (Powell, J., dissenting).
The deference to state water law found relevant by the Court includes both
specific instances in which Congress directed federal agencies to abide by state
water law, such as § 8 of the 1902 Reclamation Act and—perhaps more impor­
tantly—Congress’ acquiescence in the development by the states of comprehen­
sive procedural and substantive codes to recognize and enforce private rights to
water, including water on federal lands. The significance of statutes such as the
Mining Acts of 1866 and 1870, the Desert Land Act of 1877, the Reclamation
Act of 1902, and the McCarran Amendment is thus not that they directly regulate
federal uses of water, but that they demonstrate Congress’ recognition that the
allocation of water within the western states is primarily a matter of concern to the
states, rather than a subject for uniform comprehensive federal regulation. See
United States v. New Mexico, supra, 438 U.S. at 702 & n.5. Although Congress
may in specific instances create federal water rights that do not depend on state
law, such rights must be seen as the exception, rather than the rule, particularly as
they could substantially disrupt or disturb expectations of private appropriators
under existing state systems. See United States v. New Mexico, supra, 438 U.S.
at 715.
The effect of Congress’ deference to state water law can best be understood as
establishing a “presumption” to be read into the language and legislative history
of federal statutes that authorize the management of federal lands— i.e., that in
the absence of evidence to the contrary, it will be presumed that Congress did not
intend to alter or affect its policy of deference to state water law. Therefore, as a
general rule, it will be assumed that Congress intended federal agencies to
acquire water rights in accordance with state law and contemplated that a state
377
could deny some federal uses of water. This is squarely inconsistent with the non-
reserved water rights theory advanced by Solicitor Krulitz.
Solicitor Krulitz argued that the presumption of deference to state law is an
unwarranted exception to the established doctrine that “federal activities are
immune from state regulation unless there is a ‘clear congressional mandate,’ or
‘specific congressional action.’ ” Krulitz Op. at 564 (citations omitted). The cases
relied upon by Solicitor Krulitz in support of this argument, however, involve
federal statutory schemes that are ill-adapted to state law,100 or state statutes that
operate to frustrate specific federal purposes.101 If we look at other areas in which
the Court has recognized that state rules may apply to federal programs, it is clear
that the approach taken and result reached by the Court in California and New
Mexico are not aberrations, but rather are consistent with the approach of the
Court in those areas.
The Court’s recent decision in United States v. Kimbell Foods, Inc., 440 U.S.
715 (1979), is particularly instructive. In that case, the Court considered whether
contractual liens arising from certain federal loan programs take precedence over
private liens established under state commercial laws. The federal statutes in
question, the Small Business Act and the Federal Housing Act, authorized
federal agencies to secure certain loans and provided for liens arising out of those
loans, but did not establish any priority for the liens. Analyzing the question as
one of “ federal common law,” 102 the Court refused to fashion specific federal
rules governing the relative priority of private liens and liens arising under the
government’s lending program; it held that priorities should be determined under
applicable state laws. The Court recognized that federal law governed the rights
of the United States arising under the loan programs, because the lending
agencies derived their authority from specific acts of Congress passed in the
exercise of a constitutional power and “ their rights, [therefore] should derive
from a federal source,” but held that application of federal law does not require,
in every instance, the creation of uniform federal rules. 440 U.S. at 726, 728.103
100 See, e.g., Hancock v. Train. 426 U S 167 (1976) (Clean Air Act); EPA v. State Water Resources Control
Board, 426 U S. 200 (1976) (Clean Water Act); Kleppe v New Mexico, 426 U S. 529 (1976) (Wild Free-Roaming
Horses and Burros Act).
101 See. e.g . United States v Little Lake Misere Land Co., 412 U.S. 580, 597 (1973) (Louisiana statute
governing mineral rights in land conveyance to the United States is “ hostile” to federal interests under the
Migratory Bird Conservation Act and discriminates against federal interests).
102 The Supreme Court has generally not characterized questions of federal water rights as involving federal
common law See, e.g.. United States v New Mexico, supra, but see Hinderhder v. LaPlata River & Cherry Creek
Ditch Co., 304 U S. 92 (1938) (federal common law applied to reverse a decision of the Colorado Supreme Court
concerning the appropriation of water in an interstate stream). However, as at least two commentators have noted, the
analogy is apt. See Grow & Stewart, supra n.36; Note, “ Federal Nonreserved Water Rights,” 48 U. Chi. L. Rev.
758 (1981) That is, the task undertaken by the courts in the name of federal common law is to fill interstices left by
congressional authorization of a federal program that fails to deal specifically or comprehensively with rights and
liabilities that may arise under that program See Clearfield Trust Co v. United States, 318 U.S. 363, 367 (1943)
(“In the absence of an applicable Act of Congress it is for the federal courts to fashion the governing rule of law
according to their own standards”); see generally R Bator, P Mishkin, D Shapiro, and H. Wechsler, The Federal
Courts and the Federal System, 691-708 (2d ed. 1973). An analysis of federal water rights similarly requires the
courts or administrative agencies to determine what rules should apply to water necessary to carry out con-
gressionally authorized programs, where Congress has expressly authorized only the use of the underlying land
103 The C ourt’s use of the term “ federal law” in this context connotes only that the federal judiciary is competent
to determine nghts ansing under the federal programs See 440 U.S. at 727

378
In some cases, federal law may require no more than the adoption or borrowing of
rules created by state law:
Whether to adopt state law or to fashion a nationwide federal rule
is a matter of judicial policy “ dependent upon a variety of consid­
erations always relevant to the nature of the specific governmental
interests and to the effects upon them of applying state law.”
440 U.S. at 728, quoting United States v. Standard Oil Co., 332 U.S. 301, 310
(1947); see also United States v. Little Lake Misere Land Co., supra, 412 U.S. at
594-95.
The Court identified three considerations relevant to the choice of federal or
state rules:
(1) the need, if any, for uniform nationwide rules governing
implementation or administration of federal programs;
(2) the extent to which application of state law would frustrate
specific objectives of the federal program; and
(3) the extent to which application of a federal rule would disrupt
relationships predicated on state law.
See 440 U.S. at 728-29. In the circumstances presented in Kimbell, the Court
concluded that none of these considerations required fashioning of specific
federal rules governing the priority of liens under the SB A or FHA.
The Court’s reasoning in Kimbell is analogous in several respects to its
reasoning in California and New Mexico. For example, in rejecting the govern­
ment’s contention that administration of the SBA and FHA programs required a
uniform national rule of priority, the Court found it significant that the practice
and policies of the responsible agencies in administering the loan programs were
in many respects adapted to state law, with apparently little disruptive effect on
the accomplishment of the goals of the program. See 440 U.S. at 730-33.
Similarly, in California and New Mexico, the Court found it relevant that the
Bureau of Reclamation and the Forest Service had in the past conformed their
acquisition of water rights to state law as a matter of administrative practice and
interpretation. See California v. United States, supra, 438 U.S. at 675-76;
United States v. New Mexico, supra, 438 U.S. at 717 n. 24. In Kimbell, as in New
Mexico and California, the Court recognized that creation of special federal rules
would substantially disrupt expectations built on established state law. The
Court’s comments in Kimbell in that regard are equally applicable to the poten­
tially disruptive effect of federal water rights that could be asserted without
regard to state substantive or procedural law:
In structuring financial transactions, businessmen depend on state
commercial law to provide the stability essential for reliable
evaluation of the risks involved. However, subjecting federal
contractual liens to the doctrines developed in the lien area
379
 [giving such liens priority] could undermine that stability. Cred­
itors who justifiably rely on state law to obtain superior liens
would have their expectations thwarted whenever a federal con­
tractual security interest suddenly appeared and took precedence.
440 U.S. at 739 (citations omitted).
Most importantly, the Court indicated in Kimbell that it would be willing to
fashion special federal rules of priority only if application of state rules would
frustrate the specific purposes for which Congress had authorized the loan
programs. The Court concluded that the interest of the United States as a “ quasi­
commercial lender” did not require the same sort of extraordinary priority that
had been accorded other liens created under federal programs, such as tax liens,
which are intended to secure adequate revenues in order that the United States can
discharge its obligations. In reaching this conclusion, the Court found it highly
relevant that Congress had recognized by statute that state claims may in some
instances have priority even over federal tax liens:
We do not suggest that Congress’ actions in the tax lien area
control our choice of law in the commercial context. But in
fashioning federal principles to govern areas left open by Con­
gress, our function is to effectuate congressional policy. To ignore
Congress’ disapproval of unrestricted federal priority in an area as
important to the Nation’s stability as taxation would be inconsist­
ent with this function.
440 U.S. at 738 (citations omitted). The significance attributed by the Court to
such expressions of congressional policy and its unwillingness to create federal
rules of priority absent a showing that application of state rules will frustrate
specific federal interests echoes the reasoning of the Court in both California and
New Mexico. Thus, where application of state law will not frustrate specific
federal purposes or interests, where the federal program has been and can be
adopted to state law, and where implication of federal rights would substantially
disrupt expectations of private individuals based upon an existing comprehensive
state regulatory scheme, the teaching of Kimbell, California, and New Mexico is
that state law may control federal rights and liabilities arising under federal
programs.
The next step of the analysis is to determine whether, in a particular statutory
scheme authorizing the management of federal lands or federal water projects,
Congress intended to carve out an exception in that instance to its general policy
of deference to state water law. This is precisely what the Court did in California
and New Mexico. In both cases, the Court looked in detail, on a case-by-case
basis, at the statutes in question and their legislative history to determine whether,
or under what circumstances, Congress intended that the Bureau of Reclamation
or the Forest Service could use water without regard to state water laws.
Because California and New Mexico dealt only with two particular statutes,
they do not provide a definitive answer as to federal rights that can be asserted
380
under other statutes. That determination can be made only by examining each
statute in light of its legislative history and the possible conflicts that could be
created by application of state law. Nonetheless, the Court’s reasoning in New
Mexico and California provides the relevant framework for that examination.
We believe that California and New Mexico must be read to limit the bases
upon which federal water rights may be asserted without regard to state law to
specific congressional directives or authorizations that override inconsistent state
law, and the establishment of primary purposes for the management of federal
lands or construction and operation of federal projects that would be frustrated by
the application of state law. As we noted supra, we believe that specific con­
gressional directives must be construed narrowly, and do not include all author­
ized functions or uses of federal property. The clearest example of such directives
would be provisions that place express limitations or conditions on the use or
distribution of water from federal projects or express conditions or specifications
included in congressional authorizations of federal projects. In the abstract,
pending clarification by the Court of its holding in California, however, it is
difficult for us to provide more detailed guidance.
The determination of whether there has been a sufficient manifestation of
federal power in order to invoke the Supremacy Clause is difficult to make in the
abstract, and may be clarified only through administrative interpretation or
litigation. The starting point, however, is unquestionably the content and the
context of the act, usually a statute, but occasionally an executive order, express­
ing the exercise of a constitutional federal power. As we have discussed above,
the Court’s analysis of federal-state conflicts in other areas may provide some
guidance in determining the validity of the exercise of the power. In particular, the
Court has found relevant such factors as: the extent to which federal programs can
be or have been adapted to state law;104the role played by the federal government,
the significance of the federal interests at stake, and the risk to federal goals and
interests posed by application of state law;105 and the extent to which application
of federal rules will disrupt private expectations.106See United States v. Kimbell
Foods, Inc., supra, 440 U.S. at 728—29; Wilson v. Omaha Indian Tribe, 442 U.S.
653, 671-74 (1979). These factors, together with the legislative history of the
statute in question, must be weighed in determining the basis for federal water
rights.
We do not view the Court’s discussion in New Mexico of primary purposes and
secondary uses as necessarily limited to federal lands that have been formally
withdrawn from the public domain. We believe, for example, that the implied
right analysis used by the Court in New Mexico and other reserved right cases
supports a parallel implication on “acquired” lands that have been set aside for
specific federal purposes, for example, national forest lands acquired under the
104 See. e g., United States v. Yazell, 382 U S 341, 354-57 (1966), United States v Standard Oil Co., 332 U.S.
301, 311 (1947)
105 See. e g. . RFC v Beaver County, 328 U.S. 204,209-10(1946), United States v Little Lake Misere Land Co.,
supra n 101, 412 U.S at 595-97, United States v. Yazell. supra n 104, 382 U S. at 352-53
106 See, e.g.. United States v Brosnan, 363 U S. 237, 241—42 (1960), Wallis v Pan American Petroleum Corp .
384 U S 63, 68 (1966)

381
provisions of the Weeks Act, 16U.S.C. § 515.107 Much of the language used by
the Court to describe the scope of the reservation doctrine, in fact, is broad
enough to cover all lands set aside for a particular federal purpose, regardless of
the prior ownership of the land. For example, in Arizona v. California, supra, in
which the Court recognized that the reserved right doctrine applies to non-Indian
lands, the Court agreed with the conclusion of the Master “that the principle
underlying the reservation of water rights for Indian Reservations was equally
applicable to other federal establishments such as National Recreation Areas and
National Forests.” 373 U.S. at 601 (emphasis added). In Cappaert v. United
States, supra, the Court noted that the reserved right doctrine “ applies to Indian
reservations and other federal enclaves." 426 U.S. at 138 (emphasis added).
Finally, in New Mexico, the Court did not suggest that the reserved right doctrine
applies only to lands that may be formally reserved from the public domain; it
recognized rather that the doctrine applies to any land that has been set aside as a
national forest (which could be reserved or acquired lands). See 438 U.S. at
698-99.108
Similarly, we believe that Congress could establish “ primary purposes” for
the management of public domain lands that could be the basis for federal water
rights. As we have noted, the reservation of land for a federal purpose does not, in
and of itself, create federal water rights. It is rather the specification of particular
purposes for which the lands should be maintained and managed and the implicit
intent that water be available for those purposes that give rise to those rights.109It
may be possible to argue, therefore, that in the relevant statutes Congress
intended that the public domain be managed for specific purposes that cannot be
accomplished without implication of federal water rights.110 However, as Solic­
itor Martz concluded, given the language and legislative history of the Taylor
Grazing Act and FLPMA, it is highly doubtful that those statutes could be read to
reflect the requisite congressional intent to displace existing state water laws. See
107 The implied water nghts that could be asserted on acquired federal lands that have been, in effect,
“ withdrawn” from the public domain under a particular statutory scheme would theoretically be the same in all
respects as reserved nghts that could be asserted under (hat scheme, unless the statute itself sets out different
purposes or different conditions for the use of acquired lands Most importantly, a pnority date for implied water
rights on such acquired lands could be asserted based on Ihe date the lands were set aside for federal purposes,
whether or not the water was actually put to use at that time However, we understand that, in general, pnonty dates
for water rights on acquired lands have been claimed in the past only based on the date of first use. As a matter of
policy, federal agencies could, of course, continue to assert pnonty for water nghts on acquired lands based on the
date of first use, in order to minimize dislocation or disruption of state and private expectations
108 The forest lands comprising the Gila National Forest were, insofar as we are aware, all reserved lands As we
pointed out in F^rt IIB (l) supra, in other contexts the Supreme Court and lower federal courts have generally
recognized a clear distinction between lands that are open to acquisition, use, and settlement under the public land
statutes and lands that have been set aside for particular federal purposes, including lands acquired or reacquired
from pnvate ownership.
109 The reservation of land, however, may be probative evidence of congressional intent, because it demonstrates
that Congress intended that the land should be managed for particular purposes to the exclusion o f other purposes— a
showing which would buttress the argument that Congress did not contemplate that state law could defeat those
purposes.
110 Nothing in the recent decision in Sierra C lub v Watt, 659 F.2d 203 (D.C Cir 1981), in which the court held
that no federal reserved rights could be created under FLPMA, necessarily precludes this argument, because the
court’s conclusion rested only on whether the land in question had been withdrawn from the public domain Since it
had not been withdrawn, the court found no reserved rights had been created The court did not consider whether,
independent of the reserved rights doctrine, FLPM A provides a basis for other federal water rights 659 F.2d at 205

382
Martz Op. at 257-58; see generally Sierra Club v. Watt, 659F.2d203, 206 (D.C.
Cir. 1981). While we believe it is theoretically possible for federal water rights to
exist on public domain lands, such rights probably cannot be asserted under the
current statutory schemes authorizing management of the public domain. We
have not, however, undertaken an independent analysis of those statutes.
IV. Conclusion
We conclude that the rationale of California and New Mexico must be applied
to any assertion of federal water rights in the western states. To the extent the
federal non-reserved water rights theory would suggest that federal water rights
are created merely by the assignment of land management functions to a federal
agency or authorization of a federal project, we believe that it does not have a
sound legal or constitutional basis and does not provide an appropriate legal basis
for assertion of water rights by federal agencies. New Mexico and California
make it clear that the federal constitutional authority to preempt state water law
must be clearly and specifically exercised, either expressly or by necessary
implication. Otherwise, the presumption is that the western states retain control
over the allocation of unappropriated water within their borders. Although we
have not undertaken an independent analysis of the various federal land manage­
ment statutes, we believe that, as a practical matter, because statutes authorizing
management of the public domain probably do not provide a basis for assertion of
federal water rights, the federal rights that can be asserted are limited to federal
reserved rights and rights implied from specific congressional directives, if the
concept of “ reserved” rights is understood to apply as well to acquired federal
lands that are part of a federal reservation. This does not mean that the federal
government is helpless to acquire the water it needs to carry out its management
functions on federal lands. If that water cannot be acquired under state law or by
purchase or condemnation of existing rights, the remedy lies within the power of
Congress. The Supremacy Clause provides Congress ample power, when cou­
pled with the commerce power, the Property Clause, or other grants of federal
power, to supersede state law. The exercise of such power must be explicit or
clearly implied, however, and federal rights to water will not be found simply by
virtue of the ownership, occupation, or use of federal land, without more.
The next logical step, to the extent it is necessary in order to apply this analysis
to particular statutes, lands, or claims, is for the agencies with responsibility for
enforcement and administration of the various land management statutes to
review their statutory authority and water needs in light of the principles we have
outlined here. We have not attempted that task here, because of its scope and
because those agencies are more familiar with the scope and administration of
those statutes and the possible problems presented by application of state law.
T h eo d o re B. O lson
Assistant Attorney General
Office cf Legal Counsel

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