Mineral County v. Walker River Irrigation Dist. ( 2021 )


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  •                  FOR PUBLICATION
    UNITED STATES COURT OF APPEALS
    FOR THE NINTH CIRCUIT
    UNITED STATES OF AMERICA,               No. 15-16342
    Plaintiff,
    D.C. No.
    WALKER RIVER PAIUTE TRIBE,              3:73-cv-0128-
    Intervenor-Plaintiff,         MMD
    and
    OPINION
    WALKER LAKE WORKING GROUP,
    Defendant-Appellant,
    MINERAL COUNTY,
    Intervenor-Plaintiff-Appellant,
    v.
    WALKER RIVER IRRIGATION
    DISTRICT; NEVADA DEPARTMENT OF
    WILDLIFE; FENILI FAMILY TRUST,
    c/o Peter Fenili and Veronica Fenili,
    Trustees; SIX N RANCH, INC., c/o
    Richard and Cynthia Nuti; MICHAEL
    NUTI; NANCY NUTI; RALPH E. NUTI;
    MARY E. NUTI; LAWRENCE M. NUTI;
    LESLIE NUTI; MICA FARMS, LLC, c/o
    Mike Faretto; JOHN AND LURA
    WEAVER FAMILY TRUST, c/o Lura
    Weaver, Trustee; SMITH VALLEY
    GARAGE, INC., c/o Dan Smith and
    2   WALKER LAKE WORKING GRP. V. WALKER RIVER IRRIGATION DIST.
    Shawna Smith; DONALD GIORGI;
    LORIE MCMAHON; MERLE
    MCMAHON; CENTENNIAL
    LIVESTOCK; LYON COUNTY;
    ANNETT’S MONO VILLAGE; F.I.M.
    CORPORATION; R.N. FULSTONE
    COMPANY; JAMES T. FOUSEKIS,
    Trustee; CHRIS H. GANSBERG, JR.;
    FAYE E. GANSBERG; TODD
    GANSBERG; HUNEWILL LAND &
    LIVESTOCK CO., INC.; DAVID
    SCEIRINE; PAMELA HAAS; VIRGINIA
    LAKE MUTUAL WATER COMPANY;
    MONO COUNTY, County Counsel,
    Defendants-Appellees.
    Appeal from the United States District Court
    for the District of Nevada
    Miranda M. Du,* District Judge, Presiding
    Argued and Submitted August 30, 2017
    Submission Withdrawn May 2, 2018
    Resubmitted January 21, 2021
    Pasadena, California
    Filed January 28, 2021
    *
    This case was reassigned to Judge Du from Judge Robert Clive
    Jones on July 19, 2018.
    WALKER LAKE WORKING GRP. V. WALKER RIVER IRRIGATION DIST.            3
    Before: A. Wallace Tashima, Susan P. Graber,** and
    Jay S. Bybee, Circuit Judges.
    Opinion by Judge Tashima
    SUMMARY***
    Water Rights
    The panel affirmed in part, and vacated in part, the district
    court’s dismissal of Mineral County’s complaint that
    intervened in longstanding litigation over the appropriation of
    Walker River Basin waters.
    In 1936, the U.S. District Court for the District of Nevada
    entered the Walker River Decree, adjudicating and settling
    water rights within the Walker River Basin under the doctrine
    of prior appropriation. The County intervened, and alleged
    that the public interest and maintenance of the public trust
    required that water flows be allowed to reach Walker Lake to
    sustain the fish population and preserve recreational values
    for the County residents. After the district court dismissed
    the County’s complaint and the County appealed, the panel
    certified questions to the Nevada Supreme Court, which held
    **
    Judge Raymond C. Fisher was a member of the panel that certified
    questions to the Nevada Supreme Court. Judge Fisher has since died and
    Judge Graber was randomly drawn to replace him. See Ninth Cir. Gen
    Order 3.2(h).
    ***
    This summary constitutes no part of the opinion of the court. It has
    been prepared by court staff for the convenience of the reader.
    4   WALKER LAKE WORKING GRP. V. WALKER RIVER IRRIGATION DIST.
    that Nevada’s “public trust doctrine applies to rights already
    adjudicated and settled under the doctrine of prior
    appropriation,” but that “the public trust doctrine does not
    permit reallocating water rights already adjudicated and
    settled under the doctrine of prior adjudication.” Mineral
    County v. Lyon County, 
    473 P.3d 418
    , 425, 430 (Nev. 2020)
    (en banc).
    In light of the Nevada Supreme Court’s decision, the
    panel held that the district court properly dismissed the
    County’s public trust claim to the extent it sought a
    reallocation of water rights adjudicated under the Decree and
    settled under the doctrine of prior appropriation. The panel
    vacated the judgment of the district court and remanded with
    instruction to consider the County’s public trust doctrine
    claim to the extent it sought remedies that would not involve
    a reallocation of adjudicated water rights. The panel
    remanded to the district court to consider in the first instance
    the County’s arguments that were not properly addressed by
    the district court. The panel rejected as untimely the
    County’s challenge to the 1936 Decree itself.
    COUNSEL
    Simeon M. Herskovits (argued) and Iris Thornton, Advocates
    for Community & Environment, El Prado, New Mexico; and
    Sean A. Rowe, Mineral County District Attorney, Hawthorne,
    Nevada; for Plaintiff-Intervenor-Appellant Mineral County,
    Nevada, and Defendant-Appellant Walker Lake Working
    Group.
    WALKER LAKE WORKING GRP. V. WALKER RIVER IRRIGATION DIST.   5
    Gordon H. DePaoli (argued) and Dale E. Ferguson,
    Woodburn and Wedge, Reno, Nevada, for Defendant-
    Appellee Walker River Irrigation District.
    Roderick E. Walston (argued), and Steven G. Martin, Best
    Best & Krieger LLP, Walnut Creek, California; Stephen B.
    Rye, District Attorney, Lyon County, Yerington, Nevada;
    Jerry M. Snyder, Reno, Nevada; Therese A. Ure, Schroeder
    Law Offices P.C., Reno, Nevada; Stacey Simon, County
    Counsel; Stephen M. Kerins, Deputy County Counsel; Jason
    Canger, Assistant County Counsel; Office of the County
    Counsel, County of Mono, Mammoth Lakes, California; for
    Defendants-Appellees Lyon County, Centennial Livestock,
    Mono County, and the Schroeder Group.
    Bryan L. Stockton (argued), Senior Deputy Attorney General;
    Tori N. Sundheim, Deputy Attorney General; Aaron D. Ford,
    Attorney General; Attorney General’s Office, Carson City,
    Nevada; for Defendant-Appellee Nevada Department of
    Wildlife.
    Robert W. Byrne, Senior Assistant Attorney General; Randy
    L. Barrow, Supervising Deputy Attorney General; Deborah
    Barnes and Tara L. Mueller, Deputy Attorneys General;
    Attorney General’s Office, Oakland, California; for Amicus
    Curiae State of California.
    John Echeverria, Vermont Law School, South Royalton,
    Vermont, for Amici Curiae Natural Resources Defense
    Council and Sierra Club.
    David R. Owen, Professor of Law, UC Hastings College of
    Law, San Francisco, California; Richard M. Frank, Professor
    6   WALKER LAKE WORKING GRP. V. WALKER RIVER IRRIGATION DIST.
    of Environmental Practice, UC Davis School of Law, Davis,
    California; for Amici Curiae Law Professors.
    Wes Williams, Law Offices of Wes Williams Jr. P.C.,
    Schurz, Nevada, for Amicus Curiae Walker River Paiute
    Tribe.
    OPINION
    TASHIMA, Circuit Judge:
    In 1936, the United States District Court for the District
    of Nevada entered the Walker River Decree (“Decree”),
    adjudicating and settling water rights within the Walker River
    Basin under the doctrine of prior appropriation. In the
    ensuing decades, these water allocations have adversely
    affected Walker Lake, the terminus of the Basin’s water
    flows. The lake has lost more than half of its surface area and
    volume, and the lake’s once-vibrant fishing and recreational
    activities—the lifeblood of Mineral County’s economy and
    a significant source of County revenues—have been
    threatened. To address these effects, Mineral County (the
    “County”) intervened in longstanding litigation over the
    Basin’s waters, alleging that “[t]he public interest and
    maintenance of the public trust require[s] that the flows be
    allowed to reach Walker Lake that will sustain minimum
    levels for the naturally occurring fish population and provide
    for the preservation of Walker Lake for the citizens and
    residents of the County for recreational values, preservation
    of wildlife, and maintenance of the economy of Mineral
    County.”
    WALKER LAKE WORKING GRP. V. WALKER RIVER IRRIGATION DIST.   7
    After the district court dismissed the County’s complaint
    and the County appealed, we certified questions to the
    Nevada Supreme Court, see Mineral County v. Walker River
    Irrigation Dist., 
    900 F.3d 1027
    , 1034 (9th Cir. 2018), which
    the state court has now answered, holding that Nevada’s
    “public trust doctrine applies to rights already adjudicated
    and settled under the doctrine of prior appropriation,” but that
    “the public trust doctrine does not permit reallocating water
    rights already adjudicated and settled under the doctrine of
    prior appropriation.” Mineral County v. Lyon County,
    
    473 P.3d 418
    , 425, 430 (Nev. 2020) (en banc).
    In light of the Nevada Supreme Court’s decision, we
    vacate the judgment of the district court and remand with
    instructions to consider the County’s public trust doctrine
    claim to the extent it seeks remedies that would not involve
    a reallocation of adjudicated water rights. We also reject as
    untimely the County’s challenge to the 1936 Decree itself.
    I. BACKGROUND
    We summarized the background of this litigation in our
    August 2018 certification order:
    A. The Walker River Basin and Walker
    Lake’s Decline
    The Walker River Basin covers about
    4000 square miles, running northeast from its
    origins in the Sierra Nevada Mountains in
    California before turning south and ultimately
    flowing into Walker Lake in Nevada. The
    first quarter of the basin lies in California, and
    California accounts for a majority of the
    8   WALKER LAKE WORKING GRP. V. WALKER RIVER IRRIGATION DIST.
    precipitation and surface water flow into the
    basin. The vast majority of the water is
    consumed across the border in Nevada.
    Walker Lake is about 13 miles long, five
    miles wide and 90 feet deep—a large lake by
    most any measure. But its size and volume
    have shrunk significantly since they were first
    measured in 1882. By 1996, Walker Lake had
    retained just 50 percent of its 1882 surface
    area and 28 percent of its 1882 volume.
    Today’s Walker Lake also suffers from high
    concentrations of total dissolved solids
    (“TDS”)—meaning it has a high salt content,
    low oxygen content and a high temperature.
    These conditions have drastically
    degraded the lake’s environmental and
    economic well-being.         The high TDS
    concentrations have proven so inhospitable to
    fish species that, according to Mineral
    County, much of the lake’s fishing industry
    “has been eliminated for the time being.”
    Walker Lake’s decline also threatens its status
    as an important shelter for migratory birds,
    and it has “drive[n] away the many Nevadans
    and other Americans who used Walker Lake
    for recreational enjoyment and economically
    productive activities.” Although the parties
    dispute the cause of Walker Lake’s troubles,
    it seems clear that upstream appropriations
    play at least some part, together with
    declining precipitation levels and natural lake
    recession over time.
    WALKER LAKE WORKING GRP. V. WALKER RIVER IRRIGATION DIST.              9
    B. Litigation Over Water Rights in the
    Basin
    In an effort to protect and rehabilitate
    Walker Lake, Mineral County intervened in
    the long-running litigation over water rights in
    the Walker River Basin. That litigation began
    in 1902, when one cattle and land company
    sued another in the United States District
    Court for the District of Nevada over
    appropriations from the Walker River. After
    considerable back and forth in state and
    federal court—including a Supreme Court
    decision holding that the Nevada federal court
    had prior, exclusive jurisdiction over the
    action, see Rickey Land & Cattle Co. v. Miller
    & Lux, 
    218 U.S. 258
    , 262 (1910)—the case
    ended in 1919.
    Five years later, the United States brought
    a new action in Nevada federal court, seeking
    to establish the water rights of the Walker
    Lake Paiute Tribe. After 12 more years of
    litigation—bringing us to 1936—that
    proceeding resulted in the Walker River
    Decree.       The Walker River Decree
    adjudicated the water rights of hundreds of
    claimants under the doctrine of prior
    appropriation.[1] The Decree also created the
    1
    “Like most western states, Nevada is a prior appropriation state.
    The prior appropriation doctrine grants ‘[a]n appropriative right [that] may
    be described as a state administrative grant that allows the use of a specific
    quantity of water for a specific beneficial purpose if water is available in
    10   WALKER LAKE WORKING GRP. V. WALKER RIVER IRRIGATION DIST.
    Walker River Commission and the United
    States Board of Water Commissioners. The
    federal district court in Nevada has
    maintained jurisdiction over the Decree and
    its administration ever since.
    In 1987, the Paiute Tribe intervened in the
    Walker River litigation to establish
    procedures for reallocating water rights under
    the Decree.         Since that proceeding’s
    conclusion in 1988, the Nevada State
    Engineer reviews all applications to change
    allocations under the Decree in Nevada,
    subject to review by the Nevada federal
    district court. It appears that Nevada’s prior
    appropriation law, which has largely been
    codified, governs the Engineer’s decisions and
    the district court’s review. See, e.g., 
    Nev. Rev. Stat. § 533.370
    ; see also Greg Walch,
    Water Law: 9 Treading Water Law—A
    Nevada Water Rights Primer, 6 Nev. Law. 18,
    18 (Nov. 1998) (discussing the history of prior
    appropriation and its codification in Nevada).
    Next, in 1991, the Paiute Tribe and the United
    States sought recognition of the Tribe’s right
    to a certain additional amount of water from
    the Walker River, under a principle that
    Native American tribes have superior water
    rights based on their relationship to the federal
    government . . . .
    the source free from the claims of others with earlier appropriations.’”
    Mineral County, 473 P.3d at 423 (alterations in original) (quoting Desert
    Irrigation, Ltd. v. State, 
    944 P.2d 835
    , 837 n.1 (Nev. 1997) (per curiam)).
    WALKER LAKE WORKING GRP. V. WALKER RIVER IRRIGATION DIST.         11
    C. Mineral County’s Intervention
    In 1994, Mineral County moved to
    intervene in the Decree litigation. The district
    court granted the motion in 2013. The
    amended complaint in intervention alleges
    that “[a]ctivities and businesses attributable to
    the presence and use of Walker Lake
    represent[ ] approximately 50% of the
    economy of Mineral County.” The complaint
    asks the Decree court, “pursuant to its
    continuing jurisdiction under . . . the . . .
    Decree, [to] reopen and modify the final
    Decree to recognize the rights of Mineral
    County . . . and the public to have minimum
    levels [of water] to maintain the viability of
    Walker Lake.”          Mineral County seeks
    recognition “that a minimum of 127,000
    acre/feet [of water] per year to Walker Lake is
    . . . required under the doctrine of
    maintenance of the public trust.”[2]
    The Working Group—already a party to
    this litigation as a right-holder under the
    Decree—supports Mineral County’s position.
    2
    The Nevada Supreme Court expressly adopted the public trust
    doctrine in Lawrence v. Clark County, 
    254 P.3d 606
    , 607 (Nev. 2011) (en
    banc). “The public trust doctrine establishes that the state holds its
    navigable waterways and lands thereunder in trust for the public.”
    Mineral County, 473 P.3d at 423. In Mineral County, the Nevada
    Supreme Court clarified that the “doctrine applies to rights already
    adjudicated and settled under the doctrine of prior appropriation” and “to
    all waters within the state, whether navigable or nonnavigable.” Id. at 425
    (emphasis omitted).
    12   WALKER LAKE WORKING GRP. V. WALKER RIVER IRRIGATION DIST.
    Because of the posture of this case, the
    Working Group is considered a defendant as
    to Mineral County’s intervention. But the
    Working Group “always has supported efforts
    to transfer water rights for use in Walker Lake
    . . . and has supported the enforcement of the
    public trust doctrine for this same purpose.”
    In 2015, the district court dismissed the
    amended complaint in intervention. First, the
    district court held Mineral County lacked
    standing to assert its public trust claim. It
    concluded Mineral County’s claim “was
    based purely on a parens patriae theory” of
    standing—i.e., that Mineral County did not
    assert any of its own interests, only those of
    its citizens—and that a county lacks the
    ability to sue as parens patriae.
    Notwithstanding its conclusion on
    standing, the district court also addressed the
    merits of Mineral County’s public trust claim.
    It concluded the public trust doctrine may
    factor into future allocations of water, but that
    using the doctrine to reallocate rights already
    adjudicated under the Decree would constitute
    a taking and require just compensation.
    Invoking the political question doctrine, the
    court concluded it lacked authority to order
    Nevada to effectuate such a taking. The
    district court also held, without analysis, that
    Walker Lake is not part of the Walker River
    Basin under the Decree, and therefore that the
    WALKER LAKE WORKING GRP. V. WALKER RIVER IRRIGATION DIST.   13
    Decree prohibits allocating any water
    specifically to the lake.
    Mineral County, 900 F.3d at 1028–30 (9th Cir. 2018)
    (amended order) (some alterations in original) (footnotes
    omitted).
    II. PROCEEDINGS ON APPEAL
    The County timely appealed. We issued a memorandum
    disposition holding that the County has standing. Mono
    County v. Walker River Irrigation Dist., 735 F. App’x 271,
    273–74 (9th Cir. 2018). In a published opinion, we certified
    two questions to the Nevada Supreme Court:
    [1] Does the public trust doctrine apply to
    rights already adjudicated and settled under
    the doctrine of prior appropriation and, if so,
    to what extent?
    [2] If the public trust doctrine applies and
    allows for reallocation of rights settled under
    the doctrine of prior appropriation, does the
    abrogation of such adjudicated or vested
    rights constitute a “taking” under the Nevada
    Constitution requiring payment of just
    compensation?
    Mineral County, 900 F.3d at 1034. In a related appeal, we
    also held that Walker Lake is part of the Walker River Basin.
    14   WALKER LAKE WORKING GRP. V. WALKER RIVER IRRIGATION DIST.
    United States v. U.S. Bd. of Water Comm’rs, 
    893 F.3d 578
    ,
    606 (9th Cir. 2018).3
    The Nevada Supreme Court accepted certification,
    rephrased the first question to ask whether “the public trust
    doctrine permit[s] reallocating rights already adjudicated and
    settled under the doctrine of prior appropriation,” and
    answered the question in the negative. Mineral County,
    473 P.3d at 421. The court explained that “Nevada’s water
    statutes are consistent with the public trust doctrine” because
    they “require the State Engineer to consider the public
    interest in allocating water rights” and satisfy the three-part
    test described in Lawrence for determining whether the
    alienation of public trust property is valid. Id. at 426–27
    (emphasis omitted) (citing Lawrence, 
    254 P.3d at 616
    ). Next,
    the court held that “[t]he state’s water statutes recognize the
    importance of finality in water rights and therefore do not
    permit reallocation of adjudicated water rights.” Id. at 429
    (emphasis omitted). The court therefore held that “the public
    trust doctrine does not permit reallocating water rights
    already adjudicated and settled under the doctrine of prior
    appropriation.” Id. at 430. The court explained:
    We recognize the tragic decline of Walker
    Lake. But while we are sympathetic to the
    plight of Walker Lake and the resulting
    negative impacts on the wildlife, resources,
    and economy in Mineral County, we cannot
    use the public trust doctrine as a tool to uproot
    3
    In a separate related appeal, we also reassigned “all aspects of the
    Walker River Basin water rights case pending in the District of Nevada”
    to a different district judge. United States v. Walker River Irrigation Dist.,
    
    890 F.3d 1161
    , 1174 (9th Cir. 2018).
    WALKER LAKE WORKING GRP. V. WALKER RIVER IRRIGATION DIST.   15
    an entire water system, particularly where
    finality is firmly rooted in our statutes. We
    cannot read into the statutes any authority to
    permit reallocation when the Legislature has
    already declared that adjudicated water rights
    are final, nor can we substitute our own policy
    judgments for the Legislature’s.
    
    Id.
     (footnote omitted).
    III. STANDARD OF REVIEW
    We review de novo a dismissal for failure to state a claim
    upon which relief can be granted, accepting all factual
    allegations in the complaint as true and drawing all
    reasonable inferences in favor of the nonmoving party. Oki
    Semiconductor Co. v. Wells Fargo Bank, N.A., 
    298 F.3d 768
    ,
    772 (9th Cir. 2002).
    IV. DISCUSSION
    To the extent that Mineral County seeks a reallocation of
    water rights already adjudicated and settled under the doctrine
    of prior appropriation, the parties agree that the County’s
    claim is foreclosed by the Nevada Supreme Court’s decision.
    Insofar as the County seeks a reallocation of water rights, it
    appears that “the voluntary sale and purchase of water rights
    is the only available means to accommodate the needs of
    current water right holders and to restore Walker Lake under
    16   WALKER LAKE WORKING GRP. V. WALKER RIVER IRRIGATION DIST.
    the Decree.” Suppl. Br. of Appellee Nev. Dep’t of Wildlife
    at 4.4
    The County insists, however, that this is not the end of the
    case. The County identifies two legal theories that it says
    would not require a reallocation of adjudicated water rights.
    Because the Nevada Supreme Court did not address, let alone
    foreclose, these theories, the County maintains that we should
    vacate the judgment and remand for further proceedings on
    these two theories. As we shall explain, we agree in part with
    the County’s contentions.
    A. Challenging the 1936 Decree Itself
    First, we reject the County’s argument that we should
    remand for further proceedings on its claim that the 1936
    Decree itself violates the public trust doctrine. The County
    points out, correctly, that the water rights at issue here were
    adjudicated in 1936, long before the Nevada Supreme Court,
    in its 2011 Lawrence decision, first articulated its three-part
    test for determining whether the alienation of public trust
    waters satisfies the public trust doctrine.5 Thus, in the
    4
    Such efforts may have already achieved some success. According
    to the County, a “substantial portion of the necessary inflows to Walker
    Lake already is being provided for by the Walker Basin Conservancy’s
    water rights acquisition program, which involves the purchase of Walker
    River water rights on the open market and transfer of those rights to
    instream flow use in order to benefit Walker Lake.” Suppl. Br. of
    Appellants Mineral County & Walker Lake Working Grp. at 23.
    5
    Lawrence held that, when “reviewing dispensations of public trust
    property . . . , courts of this state must consider (1) whether the
    dispensation was made for a public purpose, (2) whether the state received
    fair consideration in exchange for the dispensation, and (3) whether the
    dispensation satisfies ‘the state’s special obligation to maintain the trust
    WALKER LAKE WORKING GRP. V. WALKER RIVER IRRIGATION DIST.       17
    County’s view, no court has ever determined whether the
    dispensation of state waters under the 1936 Decree comports
    with the public trust doctrine, and it is an open question
    “whether adequate consideration of the public trust occurred
    in the individual allocative decisions of the Walker River
    Decree.” Suppl. Br. of Appellants Mineral County & Walker
    Lake Working Grp. at 14. Consequently, the County argues
    that this “case must be remanded to the district court to
    determine . . . whether the 1936 Decree, which merely
    confirmed pre-statutory prior appropriative rights, violated
    the public trust doctrine by over-allocating the basin and
    failing to consider the doctrine.” Id. at 19.
    Whatever merit there may be to this novel contention, we
    are not persuaded that the claim is timely. In Mineral
    County, the Nevada Supreme Court noted that challenges to
    a judicial decree adjudicating water rights must be brought
    within three years:
    As part of Nevada’s comprehensive water
    statutes, which we conclude adhere to the
    public trust doctrine, the Legislature enacted
    NRS 533.185 to establish a judicial decree
    regarding a water right permit. Regarding
    those judicial decrees, NRS 533.210(1)
    provides that:
    The decree entered by the court, as
    provided by NRS 533.185, shall be
    final and shall be conclusive upon all
    for the use and enjoyment of present and future generations.’” Lawrence,
    
    254 P.3d at 616
     (quoting Arizona Ctr. for Law v. Hassell, 
    837 P.2d 158
    ,
    170 (Ariz. Ct. App. 1991)).
    18   WALKER LAKE WORKING GRP. V. WALKER RIVER IRRIGATION DIST.
    persons and rights lawfully embraced
    within the adjudication; but the State
    Engineer or any party or adjudicated
    claimant upon any stream or stream
    system affected by such decree may,
    at any time within 3 years from the
    entry thereof, apply to the court for a
    modification of the decree . . . .
    Mineral County, 473 P.3d at 429 (emphasis in original)
    (quoting 
    Nev. Rev. Stat. § 533.210
    (1)). The County has not
    pointed to any statute, rule, or case law authorizing such a
    challenge more than 80 years after a decree has become final
    and conclusive. Because allowing such challenges after so
    much time has elapsed would plainly undermine the “finality
    in water rights” that Nevada’s water statutes deem important,
    see 
    id.
     at 429–30, the County’s failure to act sooner is
    dispositive. We therefore hold that the challenge is untimely.
    B. Remedies That Do Not Involve a Reallocation of
    Water Rights
    We agree, however, with the County’s second
    contention—that its public trust claim remains viable because
    the County can seek remedies that would not involve a
    reallocation of adjudicated water rights.
    The County argues that “the public trust doctrine imposes
    a continuing affirmative duty on the Decree Court to manage
    the resource for the benefit of future generations using
    remedies other than a reallocation of water rights, which is
    not permitted.” Suppl. Br. of Appellants Mineral County &
    Walker Lake Working Grp. at 6. Hence, according to the
    County, this case “must be remanded to the district court to
    WALKER LAKE WORKING GRP. V. WALKER RIVER IRRIGATION DIST.   19
    determine: (1) . . . whether the continuing duty of the Decree
    Court to maintain Walker Lake’s public trust uses and values
    has been violated since the entry of the Decree; (2) if so, what
    level of average annual minimum flows must reach the Lake;
    and finally (3) what the proper remedy ought to be.” Id.
    at 19. Proper remedies, the County tells us, could include:
    (1) a change in how surplus waters are
    managed in wet years and how flows outside
    of the irrigation season are managed;
    (2) mandating efficiency improvements with
    a requirement that water saved thereby be
    released to Walker Lake; (3) curtailment of
    the most speculative junior rights on the
    system; (4) a mandate that the State provide
    both a plan for fulfilling its public trust duty
    to Walker Lake and the funding necessary to
    effectuate that plan; and/or (5) an order
    requiring water rights holders to come up with
    a plan to reduce consumptive water use in the
    Basin as was done by the State Engineer in
    Diamond Valley.
    Id. at 15–16 (alterations omitted). The County maintains that
    achieving sufficient inflows into Walker Lake “without a
    reallocation of water rights” is a factual issue “for the Decree
    Court to address on remand.” Id. at 25.
    We are not persuaded by the Walker River Irrigation
    District’s (“Irrigation District”) arguments that this issue does
    not warrant a remand. First, we agree with the County that
    the Nevada Supreme Court’s decision in Mineral County does
    not foreclose the County from seeking remedies under the
    public trust doctrine that do not require a reallocation of
    20   WALKER LAKE WORKING GRP. V. WALKER RIVER IRRIGATION DIST.
    adjudicated water rights. To be sure, the Nevada Supreme
    Court assumed that affording effective relief to the County
    would require a reallocation of such rights: “The Basin does
    not appear able to meet the county’s needs without abrogating
    the rights of more senior right holders. The county’s request
    would therefore require reallocating water rights.” Mineral
    County, 473 P.3d at 430 n.8. The court, however, did not
    consider whether other remedies were viable. The court,
    moreover, squarely held that “[t]he public trust doctrine
    applies to rights already adjudicated and settled under the
    doctrine of prior appropriation.” Id. at 425. Although the
    court noted that the public trust doctrine “generally acts as a
    restraint on the state in alienating public trust resources,” id.
    at 423 (emphasis added), the court did not hold, as the
    Irrigation District suggests, that the doctrine acts only “as a
    restraint on alienation of a public resource.” Suppl. Br. of
    Appellee Walker River Irrigation Dist. at 13.
    Second, we are not persuaded by the Irrigation District’s
    argument that the County’s argument is a new one and that,
    “[a]fter over 25 years, Mineral County should not be allowed
    to change its position.” Id. at 12. Although Mineral County’s
    motion to intervene, filed in 1994, was granted in 2013, the
    litigation remains at an early stage. The district court
    dismissed the County’s amended complaint in intervention at
    the pleading stage, under Rule 12, and the case has since been
    on appeal. Furthermore, the County’s complaint is broad
    enough to encompass the remedies it now seeks, and, even if
    that were not the case, “[t]he liberal policies reflected in
    Rules 15(a) and 15(b) permit the demand to be amended
    either before or during trial.” 5 Arthur R. Miller et al.,
    Federal Practice and Procedure § 1255 (3d ed. 2020). Under
    Rule 54(c), moreover, “the district court may grant any relief
    to which the evidence shows a party is entitled, even though
    WALKER LAKE WORKING GRP. V. WALKER RIVER IRRIGATION DIST.   21
    that party has failed to request the appropriate remedy or
    remedies in his pleading.” Id.
    Third, we decline to address for the first time on appeal
    the Irrigation District’s arguments that the County’s proposed
    remedies “are either unnecessary, or clearly beyond the
    power of the district court.” Suppl. Br. of Appellee Walker
    River Irrigation Dist. at 14. To be sure, some of the
    arguments the Irrigation District raises may have merit. The
    Irrigation District plausibly argues, for example, that
    “[c]urtailment of the ‘most speculative junior rights’ on the
    system for the benefit of Walker Lake clearly would be a
    direct reallocation of those junior water rights”—action that
    the Nevada Supreme Court’s decision forecloses. Id. at 15.
    But these arguments have not been developed, passed on by
    the district court, or briefed on appeal. We therefore leave
    them for the district court to address, in the first instance, on
    remand.
    V. CONCLUSION
    The district court properly dismissed Mineral County’s
    public trust claim to the extent it seeks a reallocation of water
    rights adjudicated under the Decree and settled under the
    doctrine of prior appropriation. The County, however, may
    pursue its public trust claim to the extent that the County
    seeks remedies that would not involve a reallocation of such
    rights. The judgment of the district court, therefore, is
    affirmed in part and vacated in part, and the case is remanded
    for proceedings consistent with this opinion.
    22   WALKER LAKE WORKING GRP. V. WALKER RIVER IRRIGATION DIST.
    Each party shall bear its own costs on appeal.
    AFFIRMED in part; VACATED in part; and
    REMANDED.