Timothy Mayo v. Michael T. Reynolds ( 2017 )


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  •  United States Court of Appeals
    FOR THE DISTRICT OF COLUMBIA CIRCUIT
    Argued September 11, 2017         Decided November 7, 2017
    No. 16-5282
    TIMOTHY MAYO,
    APPELLEE
    KENT NELSON,
    APPELLANT
    v.
    MICHAEL T. REYNOLDS, IN HIS OFFICIAL CAPACITY AS ACTING
    DIRECTOR OF THE U.S. NATIONAL PARK SERVICE, ET AL.,
    APPELLEES
    Appeal from the United States District Court
    for the District of Columbia
    (No. 1:14-cv-01751)
    Eric R. Glitzenstein argued the cause for appellant. With
    him on the briefs was Katherine A. Meyer.
    Rachel Heron, Attorney, U.S. Department of Justice,
    argued the cause for federal appellees. With her on the brief
    were Jeffrey H. Wood, Acting Assistant Attorney General,
    and Andrew Mergen, J. David Gunter II, and Judith Coleman,
    Attorneys.
    2
    Erik E. Petersen, Assistant Attorney General, Office of
    the Attorney General for the State of Wyoming, argued the
    cause for intervenor-appellee State of Wyoming. With him on
    the brief was James Kaste, Senior Assistant Attorney General.
    Douglas S. Burdin, Anna M. Seidman, and Jeremy E.
    Clare were on the brief for intervenor-appellee Safari Club
    International.
    Before: MILLETT, Circuit Judge, and EDWARDS and
    WILLIAMS, Senior Circuit Judges.
    Opinion for the Court filed by Senior Circuit Judge
    EDWARDS.
    EDWARDS, Senior Circuit Judge: This case involves a
    challenge to decisions made by the National Park Service
    (“Park Service”) authorizing recreational hunting of elk in
    Wyoming’s Grand Teton National Park (“Grand Teton”).
    Appellant claims that the Park Service violated the National
    Environmental Policy Act (“NEPA”) by authorizing
    recreational hunts each year without first conducting a NEPA
    review to assess whether and to what extent hunting was in
    fact necessary for the proper management and protection of
    the elk. Appellant’s Br. 26.
    Grand Teton and the National Elk Refuge (“Refuge”) are
    home to the “Jackson herd,” one of the largest concentrations
    of elk in North America. Two federal agencies share primary
    responsibility for managing the Jackson herd: the Park
    Service, which has jurisdiction over Grand Teton, and the
    U.S. Fish and Wildlife Service (“FWS”), which manages the
    Refuge. In 2007, the two agencies, acting together, adopted a
    fifteen-year plan (“2007 Plan”) to manage the Jackson herd.
    The 2007 Plan set objectives to reduce the population size of
    3
    the herd, limit their risk of disease, and conserve their habitat.
    In conjunction with the 2007 Plan, the agencies also issued a
    final environmental impact statement (“EIS”), as required by
    NEPA.
    The 2007 Plan analyzed six alternative long-term
    strategies for managing the Jackson herd. The EIS, in turn,
    carefully assessed the environmental risks posed by the
    alternative strategies. In the end, the agencies adopted an elk-
    reduction program pursuant to which the Park Service would
    authorize elk hunting as needed to attain the Plan’s population
    objectives. The program also contemplated that the FWS
    would reduce supplemental feed given to the elk during
    winter months on the Refuge. Between 2007 and 2015, the
    Park Service adhered to the elk-reduction program in
    determining the number of elk authorized to be harvested and
    the number of hunters deputized to participate in a hunt. As a
    result, from 2007 to 2015, the size of the herd decreased, as
    did the number of deputized hunters and the number of elk
    authorized to be harvested. During this same period, however,
    the FWS failed to meet the 2007 Plan’s objective to wean the
    herd from supplemental feed.
    Kent Nelson and Timothy Mayo, wildlife photographers,
    filed suit in the District Court challenging the Park Service’s
    2015 program for elk hunting. See Mayo v. Jarvis, 177 F.
    Supp. 3d 91, 107–24 (D.D.C. 2016). They argued that the
    Park Service was required to prepare a new NEPA analysis
    every year that it implemented the fifteen-year elk-reduction
    program, disclosing and analyzing the unique environmental
    effects of each year’s hunt. Because no such analysis was
    done for the 2015 hunt authorization, they claimed that the
    Park Service’s action violated NEPA. Appellants also
    contended that the FWS’s failure to reduce supplemental
    feeding in line with the Plan’s goals necessitated the
    4
    preparation of a supplemental EIS. However, supplemental
    feeding is managed by the FWS and Nelson and Mayo did not
    seek to pursue any action against the FWS with respect to that
    program. With respect to the NEPA claims, the District Court
    denied the plaintiffs’ summary judgment motion and granted
    the Park Service’s cross-motion for summary judgment. 
    Id. at 146.
    Nelson, but not Mayo, now appeals the District Court’s
    judgments.
    In its brief to this court, the Park Service cogently
    explains why the judgment of the District Court should be
    affirmed:
    Under NEPA, an agency must take a hard look at
    the environmental impacts of its proposed actions. The
    statute does not, however, require the agency to take a
    new look every time it takes a step that implements a
    previously-studied action, so long as the impacts of that
    step were contemplated and analyzed by the earlier
    analysis. Here, the Park Service’s 2007 Management
    Plan contemplated that the Park Service would
    authorize annual elk-reduction programs, and the 2007
    EIS accompanying that plan specifically analyzed the
    effects of such programs. . . . [Appellant] has not
    identified any impact from the 2015 reduction program
    that was not studied in the 2007 EIS . . . . The Park
    Service has therefore satisfied NEPA.
    Appellees’ Br. 24. We agree. We therefore affirm the District
    Court’s judgment on the NEPA issues.
    In the District Court, the plaintiffs also claimed that the
    agencies’ consultation over the effects of the elk-reduction
    program on the grizzly bear population did not satisfy the
    requirements of the Endangered Species Act (“ESA”). All
    5
    parties agree that this claim is now moot because the grizzly
    bear is no longer listed as a threatened species under the ESA.
    See Endangered Species and Threatened Wildlife and Plants,
    82 Fed. Reg. 30,502 (June 30, 2017) (to be codified at 50
    C.F.R. pt. 17). We therefore vacate the District Court’s
    judgment on the ESA claim. See United States v.
    Munsingwear, Inc., 
    340 U.S. 36
    , 39–40 (1950).
    I.   BACKGROUND
    A. Statutory and Regulatory Background
    1.   National Environmental Policy Act
    Congress enacted the National Environmental Policy Act
    (“NEPA”) in part “to promote efforts which will prevent or
    eliminate damage to the environment and biosphere and . . .
    enrich the understanding of the ecological systems and natural
    resources important to the Nation.” 42 U.S.C. § 4321 (2012).
    To those ends, NEPA requires all federal agencies to include
    a detailed environmental impact statement (“EIS”) “in every
    recommendation or report on . . . major Federal actions
    significantly affecting the quality of the human environment.”
    
    Id. § 4332(2)(C).
    This process ensures that an agency will
    “consider every significant aspect of the environmental
    impact of a proposed action” and “inform the public” of its
    analysis. Balt. Gas & Elec. Co. v. Nat. Res. Def. Council, Inc.,
    
    462 U.S. 87
    , 97 (1983); see also Dep’t of Transp. v. Pub.
    Citizen, 
    541 U.S. 752
    , 768 (2004). “In other words, agencies
    must ‘take a hard look at [the] environmental consequences’
    of their actions, and ‘provide for broad dissemination of
    relevant environmental information.’” Pub. Emps. for Envtl.
    Responsibility v. Hopper, 
    827 F.3d 1077
    , 1082 (D.C. Cir.
    2016) (quoting Robertson v. Methow Valley Citizens Council,
    
    490 U.S. 332
    , 350 (1989)) (internal quotation marks omitted).
    6
    Not every agency action requires the preparation of a full
    EIS, however. See, e.g., Duncan’s Point Lot Owners Ass’n
    Inc. v. FERC, 
    522 F.3d 371
    , 376 (D.C. Cir. 2008) (“[F]ederal
    control and responsibility for an action is not enough to
    trigger the EIS requirement.”). Thus, in determining whether
    a major federal action “significantly affect[s]” the
    environment, 42 U.S.C. § 4332(2)(C), an agency may prepare
    a more concise environmental assessment (“EA”), see
    Council on Environmental Quality (“CEQ”) regulations, 40
    C.F.R. § 1508.9, which may result in the agency issuing a
    “finding of no significant impact” in lieu of a full EIS, see 
    id. § 1508.13.
    Where NEPA analysis is required, its role is “primarily
    information-forcing.” Sierra Club v. FERC, 
    867 F.3d 1357
    ,
    1367 (D.C. Cir. 2017). As the Supreme Court has explained,
    “[t]here is a fundamental distinction . . . between a
    requirement that mitigation be discussed in sufficient detail to
    ensure that environmental consequences have been fairly
    evaluated, on the one hand, and a substantive requirement that
    a complete mitigation plan be actually formulated and
    adopted, on the other.” 
    Robertson, 490 U.S. at 352
    . “NEPA is
    ‘not a suitable vehicle’ for airing grievances about the
    substantive policies adopted by an agency, as ‘NEPA was not
    intended to resolve fundamental policy disputes.’” Grunewald
    v. Jarvis, 
    776 F.3d 893
    , 903 (D.C. Cir. 2015) (quoting Found.
    on Econ. Trends v. Lyng, 
    817 F.2d 882
    , 886 (D.C. Cir. 1987)).
    It is now well-established that “NEPA imposes only
    procedural requirements on federal agencies with a particular
    focus on requiring agencies to undertake analyses of the
    environmental impact of their proposals and actions.” Pub.
    
    Citizen, 541 U.S. at 756
    –57; see also Vt. Yankee Nuclear
    Power Corp. v. Nat. Res. Def. Council, Inc., 
    435 U.S. 519
    ,
    7
    558 (1978) (NEPA’s mandate “is essentially procedural”). It
    is equally clear that NEPA does not impose a duty on
    agencies “to include in every EIS a detailed explanation of
    specific measures which will be employed to mitigate the
    adverse impacts of a proposed action.” 
    Robertson, 490 U.S. at 353
    (emphasis omitted) (internal quotation omitted).
    An agency is required to supplement an existing EIS only
    if the agency “makes substantial changes in the proposed
    action that are relevant to environmental concerns,” or if there
    are “significant new circumstances or information relevant to
    environmental concerns and bearing on the proposed action or
    its impacts.” CEQ regulations, 40 C.F.R. § 1502.9(c). Under
    this standard, an agency is not required to make a new
    assessment under NEPA every time it takes a step that
    implements a previously studied action, so long as the impacts
    of that step were contemplated and analyzed by the earlier
    analysis. See, e.g., Wyoming v. U.S. Dep’t of Agric., 
    661 F.3d 1209
    , 1257–58 (10th Cir. 2011).
    In Marsh v. Oregon Natural Resources Council, 
    490 U.S. 360
    (1989), the Supreme Court explained that under the “rule
    of reason,” “an agency need not supplement an EIS every
    time new information comes to light after the EIS is
    finalized.” 
    Id. at 373.
    Rather, “a supplemental EIS must be
    prepared” only when a new action will affect the quality of
    the environment “in a significant manner or to a significant
    extent not already considered.” 
    Id. at 374;
    see also Nat’l
    Comm. for the New River, Inc. v. FERC, 
    373 F.3d 1323
    , 1330
    (D.C. Cir. 2004) (explaining that a supplemental impact
    statement is “only required where new information provides a
    seriously different picture of the environmental landscape”
    (quoting City of Olmsted Falls v. Fed. Aviation Admin., 
    292 F.3d 261
    , 274 (D.C. Cir. 2002))); Davis v. Latschar, 
    202 F.3d 359
    , 369 (D.C. Cir. 2000) (requiring a supplemental impact
    8
    statement only for “changes that cause effects which are
    significantly different from those already studied”). And
    because an agency’s decision whether to prepare a
    supplemental EIS requires “substantial agency expertise,”
    courts must defer to the agency’s “informed discretion.”
    
    Marsh, 490 U.S. at 366
    –77.
    2.   The 2007 Elk-Management Plan and Environmental
    Impact Statement
    As noted above, the Park Service and Fish and Wildlife
    Service jointly manage the Jackson elk herd. In the spring and
    summer, the Jackson herd tends to reside primarily in
    Wyoming’s Grand Teton National Park, under the jurisdiction
    of the Park Service. In the winter, however, much of the herd
    migrates to the neighboring National Elk Refuge, which is
    managed by the FWS.
    Since 1955, the Park Service has annually authorized the
    hunting of elk in the Park. Although hunting is frequently
    prohibited in national parks, Congress authorized the practice
    in Grand Teton in 1950 when it established the Park in its
    current form. See Pub. L. 81-787 § 6(a), 64 Stat. 849, 851–52
    (1950), codified at 16 U.S.C. § 673c. Specifically, Congress
    required the Park Service and Wyoming Game and Fish
    Commission to “devise . . . a program to insure the permanent
    conservation of the elk within the Grand Teton National Park”
    and directed that such conservation program “shall include the
    controlled reduction of elk in such park, . . . when it is found
    necessary for the purpose of proper management and
    protection of the elk.” 16 U.S.C. § 673c(a).
    Part of the Park Service’s justification for the elk-hunting
    program has to do with the practices of the FWS on the
    Refuge. The FWS provides supplemental feed to elk on the
    9
    Refuge during winter months on the assumption that there is
    an insufficient amount of winter range to support the numbers
    of elk that occupy the Jackson Hole area. This practice
    reduces incidents of elk starvation, but it also creates
    “significant problems” of its own. Defs. of Wildlife v. Salazar,
    
    651 F.3d 112
    , 113 (D.C. Cir. 2011). Supplemental feeding
    artificially increases the size and density of the elk herd, and it
    has also contributed to the spread of disease among the elk
    and erosion of their habitat. 
    Id. at 113–14.
    Authorized hunting
    offsets some of the adverse effects of supplemental feeding by
    containing the herd’s population size, while also managing
    the gender and age distributions of the Jackson elk herd.
    In 2007, the Park Service and the FWS adopted a fifteen-
    year plan for managing the Jackson elk herd and prepared an
    EIS to assess the environmental effects of the plan. See Final
    Bison and Elk Management Plan and Environmental Impact
    Statement for the National Elk Refuge/Grand Teton National
    Park/John D. Rockefeller, Jr., Memorial Parkway (Feb. 1,
    2007)      (“2007     Plan    and     EIS”),     available    at
    http://bisonandelkplan.fws.gov. The Plan listed four goals for
    managing the elk: (1) conserving their habitat, (2) making the
    population sustainable, (3) contributing to Wyoming’s
    population objectives for the elk, and (4) managing the risk of
    disease. 
    Id. at ix.
    To achieve those ends, the agencies
    analyzed six alternative management programs, each of which
    varied in terms of its goals for the elk reduction level sought,
    the number of elk wintering on the Refuge, the use of hunting
    to control the population, and the extent to which
    supplemental feeding would continue on the Refuge. See 
    id. at ix–x.
    The agencies chose a program denominated Alternative
    Four. That option called for reducing the total number of elk
    in the Jackson herd from approximately 13,000 to 11,000, and
    10
    the number of elk wintering on the Refuge, where
    supplemental feed is served, from 6,800 down to 5,000. 
    Id. at 48.
    The Plan aimed to meet these targets through an “adaptive
    management approach” involving public education, habitat
    conservation, and a decreasing use of supplemental feeding
    “based on established criteria and changing social, political,
    or biological conditions.” 
    Id. at 48,
    65. In addition, the
    agencies assumed that hunting would be authorized “on the
    refuge, and when necessary . . . in the park, to assist the state
    in managing herd sizes, sex and age ratios, and summer
    distributions” of elk. 
    Id. at 48.
    Specifically, the 2007 Plan
    predicted that in Grand Teton over the “long term an
    estimated average of 232–287 elk per year would be
    harvested by 773–957 deputized hunters, compared to
    baseline figures of 1,600 hunters and 480 elk per year.” 
    Id. at 472.
    As noted above, the Park Service and the FWS also
    prepared an environmental impact statement in conjunction
    with the 2007 Plan, as required by NEPA. The final EIS
    carefully addressed the impact of the Plan’s six alternatives –
    including the preferred elk-reduction program – on, inter alia,
    the Park and Refuge’s physical environment, 
    id. at 194–210,
    the habitat of the elk, 
    id. at 211–54,
    other wildlife, including
    threatened and endangered species, 
    id. at 351–66,
    human
    health and safety, 
    id. at 443–56,
    and recreational and tourism
    related activities, 
    id. at 457–93.
    Importantly, the EIS noted
    that “[t]he level of analysis [in the report was] sufficient to
    allow several management actions to be carried out without
    having to complete additional environmental analyses (e.g.,
    environmental assessments) prior to implementation.” 
    Id. at 191.
    The 2007 Plan also was required to comply with the
    Endangered Species Act (“ESA”) due to the Plan’s potential
    11
    to affect the Greater Yellowstone Ecosystem (“GYE”)
    population of grizzly bears, see 
    id. at 351,
    a species that had
    been listed as “threatened” since 1975, see Amendment
    Listing the Grizzly Bear of the 48 Coterminous States as a
    Threatened Species, 40 Fed. Reg. 31,734 (July 28, 1975).
    Accordingly, the Park Service consulted with the FWS over
    the matter. The FWS then issued a biological opinion
    determining that the implementation of the 2007 Plan’s
    preferred alternative was not likely to jeopardize the existence
    of the grizzly bear, but might result in some take of grizzlies
    by elk hunters. See Bison and Elk Management Plan: National
    Elk Refuge and Grand Teton National Park (Apr. 2007),
    Appendix E, at 171–98, reproduced at J.A. 645–72, 830–61,
    available at https://www.fws.gov/bisonandelkplan/. In 2012,
    an elk hunter killed a grizzly bear, prompting the Park Service
    to consult again with the FWS. In 2013, the FWS issued an
    addendum to its 2007 biological opinion, estimating that a
    total of five grizzly bears would be taken in the Park during
    the fifteen-year period covered by the 2007 Plan.
    Memorandum from Field Supervisor, U.S. FWS to
    Superintendent, Nat’l Park Service (Sept. 13, 2013),
    reproduced at J.A. 867–904, 870.
    B. Procedural Background
    The Park Service has authorized elk hunting in Grand
    Teton in reliance on its 2007 Plan and EIS in every year since
    the Plan was adopted. On October 20, 2014, local wildlife
    photographers Timothy Mayo and Kent Nelson brought suit
    in the District Court, challenging the annual hunting
    authorizations as contrary to the Grand Teton National Park
    Act (“Enabling Act”), 16 U.S.C. § 673c(a), National Park
    Service Organic Act (“Organic Act”), 16 U.S.C. § 1,
    Administrative Procedure Act (“APA”), 5 U.S.C. § 706(2),
    ESA, 16 U.S.C. § 1531, and NEPA, 42 U.S.C. § 4321 et seq.
    12
    Complaint for Declaratory and Injunctive Relief, ¶¶ 68–80,
    reproduced at J.A. 33–37. On July 1, 2015, the plaintiffs filed
    a supplemental complaint, incorporating by reference each of
    the statutory claims to also apply to the Park Service’s 2015
    authorization of elk hunting in the Park. Supp. Complaint,
    ¶¶ 1–8, J.A. 39–41. The State of Wyoming and Safari Club
    International intervened as defendants before the District
    Court. 
    Mayo, 177 F. Supp. 3d at 105
    .
    With respect to their NEPA claims, the plaintiffs argued
    that the Park Service was required to issue a new EA or EIS
    every year during the fifteen-year term of the elk-reduction
    program. Complaint, ¶¶ 73–74, J.A. 35; Mayo, 
    177 F. Supp. 3d
    at 107. They contended that changes had occurred after the
    agency promulgated the 2007 Plan and EIS – most notably,
    the FWS’s continued use of supplemental feeding on the
    Refuge – necessitating a supplemental EIS. Mayo, 177 F.
    Supp. 3d at 117, 122.
    The plaintiffs also challenged the biological opinion and
    its 2013 addendum as arbitrary and capricious for failing to
    address the possibility that elk viscera left by hunters “harass”
    grizzly bears within the meaning of the ESA’s take
    prohibition. 
    Id. at 142–45.
    As explained above, this claim is
    now moot, so it will not be addressed in this opinion.
    Mayo and Nelson moved for summary judgment on July
    21, 2015. The Park Service, FWS, and intervenors opposed
    that motion and cross-moved for summary judgment in their
    favor.
    On March 29, 2016, the District Court entered summary
    judgment for the government on the Enabling Act, Organic
    Act, and NEPA claims. 
    Id. at 91,
    146. With respect to the
    NEPA claims, the District Court held that the Park Service
    13
    could rely on the 2007 EIS in making its annual elk-reduction
    decisions because that document “took the requisite ‘hard
    look’ at the potential environmental effects that might result
    from continuing the elk reduction program in the Park as a
    method of managing the herd.” 
    Id. at 109.
    The District Court
    rejected the plaintiffs’ contention that the agencies had
    abandoned the 2007 Plan, and held that a supplemental EIS
    was not required since the record lacked evidence that the
    FWS’s supplemental feeding practices “on the Refuge [have]
    had a spillover effect on the environmental impacts of elk
    hunting in the Park.” 
    Id. at 122.
    Accordingly, on August 1, 2016, the District Court
    entered final judgment on all counts in the government’s
    favor. Mayo v. Jarvis, 
    203 F. Supp. 3d 31
    , 42 (D.D.C. 2016).
    Kent Nelson, but not Timothy Mayo, has now appealed the
    denial of his motion for summary judgment and the entry of
    judgment for Appellees.
    I. ANALYSIS
    A. Standard of Review
    We review the District Court’s grant and denial of
    summary judgment de novo. Theodore Roosevelt Conserv.
    P’ship v. Salazar, 
    661 F.3d 66
    , 72 (D.C. Cir. 2011).
    Because NEPA does not provide a private right of action, the
    agencies’ compliance with NEPA is reviewed under the
    Administrative Procedure Act (“APA”) “and its deferential
    standard of review.” Sierra 
    Club, 867 F.3d at 1367
    .
    The APA requires that we “hold unlawful and set aside
    agency action” that is “arbitrary, capricious, an abuse of
    discretion, or otherwise not in accordance with law.” 5 U.S.C.
    § 706(2)(A). Agency action is arbitrary and capricious “if the
    14
    agency has relied on factors which Congress has not intended
    it to consider, entirely failed to consider an important aspect
    of the problem, [or] offered an explanation for its decision
    that runs counter to the evidence before the agency.” Motor
    Vehicle Mfrs. Ass’n v. State Farm Mut. Auto. Ins. Co., 
    463 U.S. 29
    , 43 (1983); see also Duncan’s Point Lot 
    Owners, 522 F.3d at 376
    (“We will overturn an agency’s decision not to
    prepare an EIS only if that decision was arbitrary, capricious,
    or an abuse of discretion.”). In evaluating whether the agency
    has met this standard, the court must “not . . . substitute its
    [own] judgment for that of the agency.” State 
    Farm, 463 U.S. at 43
    .
    As noted above, the Supreme Court has emphasized that
    “inherent in NEPA and its implementing regulations is a ‘rule
    of reason.’” Pub. 
    Citizen, 541 U.S. at 767
    (quoting 
    Marsh, 490 U.S. at 373
    ). The rule of reason governs our review of an
    agency’s environmental analysis, N. Slope Borough v.
    Andrus, 
    642 F.2d 589
    , 600 (D.C. Cir. 1980), decision not to
    prepare a NEPA analysis, Pub. 
    Citizen, 541 U.S. at 767
    , and
    decision not to supplement an existing EIS, 
    Marsh, 490 U.S. at 373
    –74. The standard “ensures that agencies determine
    whether and to what extent to prepare an EIS based on the
    usefulness of any new potential information to the
    decisionmaking process.” Pub. 
    Citizen, 541 U.S. at 767
    ; see
    also 
    Marsh, 490 U.S. at 373
    –74. “The overarching question is
    whether an EIS’s deficiencies are significant enough to
    undermine informed public comment and informed
    decisionmaking.” Sierra 
    Club, 867 F.3d at 1368
    (citing
    Nevada v. Dep’t of Energy, 
    457 F.3d 78
    , 93 (D.C. Cir. 2006)).
    A court’s “role in reviewing an agency’s decision not to
    prepare an EIS is a ‘limited’ one, ‘designed primarily to
    ensure that no arguably significant consequences have been
    ignored.’” Myersville Citizens for a Rural Cmty., Inc. v.
    15
    FERC,      
    783 F.3d 1301
    ,    1322     (D.C.     Cir.
    2015) (quoting TOMAC v. Norton, 
    433 F.3d 852
    , 860 (D.C.
    Cir. 2006)). Necessarily, then, “[w]here the preparation of an
    EIS would serve ‘no purpose’ in light of NEPA’s regulatory
    scheme as a whole, no rule of reason worthy of that title
    would require an agency to prepare an EIS.” Pub. 
    Citizen, 541 U.S. at 767
    (internal quotation marks omitted).
    B. Appellant’s Claim Regarding the Need for an Annual
    NEPA Assessment
    Appellant’s primary argument on appeal is that each
    annual hunting authorization constitutes a “major Federal
    action” that triggers NEPA’s mandate that the agency prepare
    an EA or EIS. 42 U.S.C. § 4332(2)(C); see CEQ regulations,
    40 C.F.R. § 1508.18 (defining “Federal action” to include
    “continuing activities” and approvals by federal agencies of
    “specific projects, such as . . . management activities located
    in a defined geographic area” and “actions approved by
    permit”); 
    id. § 1508.27
    (defining “significantly”). Appellant
    offers three arguments in support of his claim that the 2007
    EIS cannot satisfy this statutory requirement: (1) the 2007
    Plan did not disclose the particulars of each future annual
    hunt; (2) the agencies have stopped implementing the Plan;
    and (3) significant new information bearing on the
    environmental effects of hunting have never been analyzed.
    Intervenor-Appellee Wyoming argues that the Park
    Service’s authorization of the 2015 elk-reduction program is
    not a “major Federal action” since it is “simply one step in the
    agency’s ongoing management of the elk and bison herds
    under the fifteen-year term of the 2007 Plan.” Wyoming’s Br.
    34. The Park Service, in turn, contends that even if each
    hunting authorization is a “major Federal action” which may
    “significantly affect” the environment, the 2007 EIS relieved
    16
    the Park Service of the obligation to prepare fresh NEPA
    documentation each year it implements the elk-reduction
    program in conformity with the 2007 Plan. Appellees’ Br. 28–
    44. We agree with the Park Service.
    Once an agency has taken a “hard look” at “every
    significant aspect of the environmental impact” of a proposed
    major federal action, Balt. 
    Gas, 462 U.S. at 97
    (quoting Vt.
    
    Yankee, 435 U.S. at 553
    ), it is not required to repeat its
    analysis simply because the agency makes subsequent
    discretionary choices in implementing the program. As
    discussed above in part I.A, an agency may rely on an
    already-performed, “thorough and comprehensive” NEPA
    analysis. New York v. U.S. Nuclear Regulatory Comm’n (New
    York II), 
    824 F.3d 1012
    , 1019 (D.C. Cir. 2016).
    In this case, the Park Service published a thorough and
    detailed EIS in 2007. Appellant has identified no significant
    way in which the subsequent hunting authorizations deviated
    from the assessment made in 2007. NEPA does not impose a
    duty on agencies “to include in every EIS a detailed
    explanation of specific measures which will be employed to
    mitigate the adverse impacts of a proposed action.”
    
    Robertson, 490 U.S. at 353
    (internal quotation marks and
    emphasis omitted). And an agency is not required to make a
    new assessment under NEPA every time it takes a step that
    implements a previously studied action. See 
    Marsh, 490 U.S. at 373
    . So long as the impacts of the steps that the agency
    takes were contemplated and analyzed by the earlier NEPA
    analysis, the agency need not supplement the original EIS or
    make a new assessment. See Nat’l Comm. for the New 
    River, 373 F.3d at 1330
    . The 2007 EIS was clearly sufficient to
    cover elk hunting during the ensuing fifteen years under the
    2007 Plan absent a material change causing unforeseen
    environmental consequences.
    17
    1.   Adequacy of the 2007 EIS
    In preparing the 2007 EIS, the agencies took a hard look
    at the potential environmental effects of the program to
    reduce the Jackson elk herd through annual hunting
    determinations. Spanning more than 600 pages, the EIS
    analyzed the effects of elk hunting on a variety of relevant
    environmental factors. For example, the EIS described how
    the elk-reduction program would likely affect the elks’
    mortality potential, see 2007 Plan and EIS at 258, 296, the
    overall size of the Jackson herd, and the concomitant ability
    of the Park Service to accomplish the Plan’s population goals
    for the elk, see 
    id. at 466–67,
    471–72. The EIS considered the
    effect of hunting on the density of the herd and distribution of
    the elk throughout the Park and Refuge, 
    id. at 288–90,
    as well
    as on calving, age, and sex ratios of the elk, 
    id. at 294–95.
    The
    EIS additionally explained how hunting might affect the elks’
    social practices, potentially increasing the elks’ “nervousness,
    energetic expenditures, and possibly decreasing nutrition
    because of reductions in foraging.” 
    Id. at 291.
    The EIS also took into account the elk-reduction
    program’s likely consequences on other wildlife, including
    various amphibians, 
    id. at 434,
    as well as mule deer, moose,
    and pronghorn and bighorn sheep, e.g., 
    id. at 399,
    377–78. It
    specifically addressed the effects of hunting on species listed
    under the ESA, such as the grizzly bear, describing how the
    presence of hunters in particular hunting areas within the Park
    and the changing scope of the hunt over time might impact
    such species. 
    Id. at 353.
    For example, the EIS considered the
    possibility that elk hunters might kill grizzly bears, 
    id. at 357,
    and, more optimistically, produce an additional source of
    nutrition for grizzlies, wolves, and bald eagles by creating elk
    “gut piles” for the animals to scavenge, 
    id. at 359.
                                   18
    In addition, the EIS considered the elk-reduction
    program’s relation to the region’s human environment. It
    evaluated the likelihood that hunting would cause injury, 
    id. at 449,
    increase the risk of traffic accidents, 
    id. at 448–49,
    and
    reduce visitors’ opportunities to observe the elk, 
    id. at 462–
    64, including for purposes of wildlife photography, 
    id. at 457–
    58. The EIS further explained that by bringing people into
    proximity with the elk, hunting might increase the risk that
    humans catch diseases from the animals. 
    Id. at 449,
    451.
    The EIS analyzed more than just the environmental effects
    of the elk-reduction program. It also evaluated alternative
    uses of hunting as an elk-management tool. For instance, it
    considered changing hunting practices by closing traditional
    hunting areas and opening non-traditional areas. 
    Id. at 279–
    80. It thoroughly discussed the possibility of eliminating
    hunting completely from the Park and Refuge. E.g., 
    id. at 265–68,
    272–73, 321. And it contained a detailed discussion
    of possible mitigation measures where relevant to the
    environmental risks it identified.
    All in all, given the level of detail in the assessment, there
    is no question that the 2007 EIS “adequately considered and
    disclosed the environmental impact of” the 2007 Plan’s
    preferred elk-reduction program, its necessity, and its
    alternatives. 
    Nevada, 457 F.3d at 93
    (quoting Balt. 
    Gas, 462 U.S. at 97
    –98).
    This appeal does not involve an arbitrary and capricious
    challenge to the Park Service’s annual decisions to authorize
    elk hunting in Grand Teton. Instead, Appellant faults the Park
    Service for not preparing a NEPA analysis each year during
    the fifteen-year term of the 2007 Plan to document each
    “hunt’s timing, location, restrictions, and . . . potential
    19
    alternatives for avoiding or minimizing impacts.” Appellant’s
    Br. 41. As we have already explained, what Appellant seeks is
    much more than is required by NEPA. The Park Service’s
    mere implementation of the 2007 Plan, without more, did not
    result in any “seriously different picture of the environmental
    landscape.” Nat’l Comm. for the New 
    River, 373 F.3d at 1330
    .
    All the environmental effects seen during the years after the
    promulgation of the 2007 Plan and EIS had been anticipated
    and analyzed in the original environmental assessment.
    Therefore, the Park Service had no duty to prepare a
    supplemental or new EIS.
    2. Agency Discretion to Determine When and How to
    Engage in NEPA Analysis
    NEPA does not prevent an agency from satisfying future
    NEPA obligations by performing a NEPA analysis at the
    outset of a long-term project. The decision in New York 
    II, 824 F.3d at 1016
    , confirms this point. In that case, the
    Nuclear Regulatory Commission had prepared a “Generic
    Environmental Impact Statement” concerning the effects of
    on-site storage of spent nuclear fuel. The agency issued a rule
    that “incorporate[d] the findings of the [EIS] into all future
    reactor licensing proceedings,” 
    id., and this
    court upheld that
    rule and EIS as lawful under NEPA, 
    id. at 1016–23.
    Therefore, it is clear here that the agencies’ decision to adopt
    a fifteen-year plan supported by one EIS was permissible
    under NEPA.
    To be sure, agencies are not always free to comply with
    NEPA by issuing a single EIS at the outset of a long-term
    project. An environmental analysis that occurs too early in the
    planning process may lack “meaningful information”
    necessary for informed consideration. Scientists’ Inst. for Pub.
    Info., Inc. v. Atomic Energy Comm’n, 
    481 F.2d 1079
    , 1093–
    20
    94 (D.C. Cir. 1973). Thus, if a program “involves . . . separate
    sub-projects and will take many years,” NEPA’s
    implementing regulations allow the agency to “evaluate[]
    each sub-project as it becomes ready” and tailor its
    subsequent analyses to particularized considerations not
    already addressed in a prior “programmatic EIS.” 
    Nevada, 457 F.3d at 91
    ; see CEQ regulations, 40 C.F.R. § 1508.28.
    “Tiering” – as this process is known – is “appropriate when it
    helps the lead agency to focus on the issues which are ripe for
    decision and exclude from consideration issues already
    decided or not yet ripe.” CEQ regulations, 40 C.F.R.
    § 1508.28(b) (emphasis added).
    In Theodore Roosevelt Conservation Partnership v.
    Salazar, for example, the Bureau of Land Management
    approved drilling permits based on EAs that tiered to a
    programmatic EIS. 
    616 F.3d 497
    , 506 (D.C. Cir. 2010).
    Plaintiffs argued that the specific approvals were arbitrary and
    capricious because the underlying EIS used an outdated
    scientific method for measuring the project’s effects on ozone
    concentrations. 
    Id. at 510–11.
    This court rejected that
    argument, stating, “[w]hile courts have required [EAs] to
    analyze certain impacts for the first time when the broader
    analysis did not address the impact in question at all, this is
    not such a case.” 
    Id. at 512
    (citation omitted). The earlier EIS
    already “address[ed] the impact drilling would have on ozone
    concentrations” and “[n]othing in the law requires agencies to
    reevaluate their existing environmental analyses each time the
    original methodologies are surpassed by new developments.”
    
    Id. Appellant claims
    that Theodore Roosevelt supports his
    argument. In that case, Appellant argues, the court rejected
    the plaintiffs’ challenges in part because the agency
    committed to performing an EA before approving any specific
    21
    application to drill. Appellant’s Br. 42–45. That is true
    enough, as far as it goes. When an earlier impact statement
    fails to take a hard look at a component of a plan that is major
    and may itself significantly affect the environment, the
    agency must do so through an EA or EIS prior to taking the
    action. But Theodore Roosevelt expressly excused the agency
    from conducting subsequent environmental analyses of issues
    already thoroughly evaluated in the earlier impact statement.
    
    See 616 F.3d at 512
    . Under the rule of reason, subsequent
    “site-specific” NEPA analyses are required only for “those
    localized environmental impacts that were not fully evaluated
    in the program statement.” Scientists’ Inst. for Pub. 
    Info., 481 F.2d at 1093
    . When all relevant environmental issues have
    already been analyzed and decided, additional EAs or
    supplementation are not required.
    Furthermore, it was for the Park Service to decide whether
    to perform the environmental analysis in a comprehensive EIS
    or in narrower annual documentation. In Natural Resources
    Defense Council, Inc. v. U.S. Nuclear Regulatory
    Commission, we explained that the agency, “in its discretion,
    could have chosen to explore alternatives to the particular
    tanks in either a ‘programmatic’ or ‘site-specific’ format.”
    
    606 F.2d 1261
    , 1271 (D.C. Cir. 1979); see also Izaak Walton
    League of Am. v. Marsh, 
    655 F.2d 346
    , 374 n. 73 (D.C. Cir.
    1981) (“[T]he decision whether to prepare a programmatic
    impact statement is committed to the agency’s discretion.”).
    Appellant has not shown that it was arbitrary and capricious
    for the Park Service to perform the required NEPA analysis in
    a single EIS.
    3. Consistency of the Annual Hunts with the 2007 Plan
    and 2007 EIS’s Projections
    22
    The record indicates that the Park Service has
    implemented the elk-reduction program in the manner
    envisioned by the 2007 Plan and analyzed in the 2007 EIS.
    The Plan and EIS predicted that the number of deputized
    hunters in the Park would decline from an average of 1,600
    hunters per year to 773–957 and, over “the long term,” the
    number of elk harvested would decline from an average of
    480 elk per year to 232 to 287 elk per year. 2007 Plan and EIS
    at 472. Over the last ten years, the number of elk authorized to
    be hunted in the Park has declined from 600 to 300, with
    fewer hunters deputized to hunt elk in both the Park and
    Refuge combined than the Plan allowed for the Park alone. In
    sum, the record confirms that the Park Service’s elk hunting
    authorizations have been within the range of the Plan’s
    expectations, on which the 2007 EIS based its analysis.
    Appellant’s argument that the agencies have abandoned
    the 2007 Plan has no merit. The record indicates only one
    implementation failure under the 2007 Plan – the FWS’s
    failure to decrease supplemental feeding on the Refuge –
    which is addressed below. However, the record also shows
    that the 2007 Plan as a whole – including its monitoring,
    education, adaptive management, and hunting programs – has
    been followed. Furthermore, as noted above, “NEPA is ‘not a
    suitable vehicle’ for airing grievances about the substantive
    policies adopted by an agency, as ‘NEPA was not intended to
    resolve fundamental policy disputes.’” 
    Grunewald, 776 F.3d at 903
    (quoting Found. on Econ. 
    Trends, 817 F.2d at 886
    ).
    Therefore, Appellant’s policy preference for reduced
    supplemental feeding is beyond the scope of our review of his
    NEPA challenge. The agencies’ 2007 NEPA assessment
    satisfied the requirements of the law for the annual elk hunts.
    The subsequent failure of the FWS to cut back on
    supplemental feeding does not undermine this conclusion,
    especially when the record indicates that all of the potential
    23
    environmental effects of the Plan were fully addressed in the
    2007 EIS and the principal policy objectives of the 2007 Plan
    are being met.
    C. Appellant’s Challenge to the FWS’s Supplemental
    Feeding
    The question remains whether the FWS’s failure to cut
    back on supplemental feeding is otherwise unlawful.
    Appellant makes much of the fact that the weaning of the herd
    from supplemental feeding was one of the methods adopted
    by the 2007 Plan to manage the population of the elk herd.
    And Appellant complains that, despite committing to working
    toward a “complete transition” away from supplemental feed
    to “free-standing forage” on the Refuge, the FWS’s
    supplemental feeding has continued on the Refuge and the
    number of elk wintering there has increased over the last ten
    years. Although the FWS never committed to ending
    supplemental feeding by any specific date, its failure to
    decrease supplemental feeding obviously is not in keeping
    with one of the goals of the Plan. See Defs. of 
    Wildlife, 651 F.3d at 117
    (noting that “the agencies are committed to
    ending supplemental feeding”).
    There are two glaring problems with Appellant’s
    complaint. First, as noted above, the failure of the FWS to cut
    back on supplemental feeding does not indicate that the 2007
    Plan has failed with respect to elk hunting.
    Second, as Appellant’s counsel conceded during oral
    argument before this court, this case does not directly
    challenge supplemental feeding. Oral Arg. Recording 37:00–
    48. The Fish and Wildlife Service, not the Park Service, is
    responsible for the supplemental feeding program, which
    takes place on the Refuge, not in the Park. And Appellant has
    24
    brought no viable legal action against the FWS to contest the
    supplemental feeding program. In an effort to overcome this
    problem, Appellant argues that the FWS’s failure to decrease
    supplemental feeding represents a substantial change in the
    environmental consequences of the elk-reduction program
    requiring supplemental NEPA analysis. This is a clever claim,
    but it fails.
    The heart of Appellant’s claim appears to be that if
    supplemental feeding is not reduced then hunting necessarily
    must continue in order to ensure that the size of the elk herd
    does not exceed the projections of the 2007 Plan. On this
    theory, Appellant argues that the Park Service must publish
    new NEPA analyses evaluating whether hunting continues to
    be necessary in light of the fact that supplemental feeding has
    not declined. We reject this argument. The EIS clearly and
    exhaustively contemplated the continuation of the elk-
    reduction program over the life of the fifteen-year Plan. And
    while it is not implausible to assume that the Park Service
    might have authorized more hunting than the 2007 Plan
    contemplated because of the FWS’s failure to decrease
    supplemental feeding, the record refutes this assumption.
    As explained above, the Park Service’s implementation of
    the annual elk-reduction program has met the population
    goals of the 2007 Plan and EIS. From 2007 to 2015, the size
    of the herd decreased, as did the number of deputized hunters
    and the number of elk authorized to be harvested. In other
    words, the number of elk authorized to be harvested and the
    number of hunters deputized to participate in hunts did not
    increase as a result of the FWS’s continued use of
    supplemental feeding. Therefore, Appellant has failed to
    demonstrate any “substantial change[] in the proposed action”
    – elk hunting in Grand Teton – “relevant to environmental
    concerns” or any “significant new circumstances or
    25
    information relevant to environmental concerns and bearing
    on the proposed action or its impacts.” CEQ regulations, 40
    C.F.R. § 1502.9(c) (emphases added).
    We reiterate that, in reaching this conclusion, a crucial
    consideration here is the fact that the “proposed action”
    challenged in this case is the Park Service’s authorization of
    elk hunting in Grand Teton, not the FWS’s supplemental
    feeding practices on the Refuge. The admitted variance
    between the Plan’s proposed supplemental feeding program
    and that program’s implementation simply does not
    “provide[] a seriously different picture of the environmental
    landscape” of hunting. Nat’l Comm. for the New 
    River, 373 F.3d at 1330
    (quoting Olmsted 
    Falls, 292 F.3d at 274
    ). No
    supplementation is therefore required. See 
    Marsh, 490 U.S. at 373
    (“[A]n agency need not supplement an EIS every time
    new information comes to light after the EIS is finalized.”);
    Blue Ridge Envtl. Def. League v. Nuclear Regulatory
    Comm’n, 
    716 F.3d 183
    , 196 (D.C. Cir. 2013) (rejecting
    supplementation claim because the “[p]etitioners failed to
    indicate any environmental data that were not considered in
    the EIS”).
    If Appellant wishes to challenge the merits of the FWS’s
    supplemental feeding program, he will have to pursue an
    appropriate action against the FWS directly.
    III. CONCLUSION
    For the reasons set forth above, we affirm the judgment of
    the District Court on the NEPA claims. We vacate the District
    Court’s judgment as to the ESA claim, which is now moot.
    So ordered.