Sierra Club, Inc. v. U.S. Forest Service , 897 F.3d 582 ( 2018 )


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  •                                         PUBLISHED
    UNITED STATES COURT OF APPEALS
    FOR THE FOURTH CIRCUIT
    No. 17-2399
    SIERRA CLUB, INC.; APPALACHIAN VOICES; WILD VIRGINIA, INC.,
    Petitioners,
    v.
    UNITED STATES FOREST SERVICE; UNITED STATES DEPARTMENT OF
    AGRICULTURE,
    Respondents,
    MOUNTAIN VALLEY PIPELINE, LLC,
    Intervenor.
    ------------------------------
    CHEROKEE FOREST VOICES; THE CLINCH COALITION; GEORGIA
    FORESTWATCH; MOUNTAINTRUE,
    Amici Supporting Petitioner.
    On Petition for Review of a Decision of the United States Forest Service.
    No. 18-1012
    THE WILDERNESS SOCIETY; PRESERVE CRAIG, INC.; SAVE MONROE,
    INC.,
    Petitioners,
    v.
    UNITED STATES FOREST SERVICE; UNITED STATES DEPARTMENT OF
    AGRICULTURE,
    Respondents,
    MOUNTAIN VALLEY PIPELINE, LLC,
    Intervenor.
    On Petition for Review of a Decision of the United States Forest Service.
    No. 18-1019
    SIERRA CLUB, INC.; APPALACHIAN VOICES; WILD VIRGINIA, INC.,
    Petitioners,
    v.
    UNITED STATES DEPARTMENT OF THE INTERIOR; UNITED STATES
    BUREAU OF LAND MANAGEMENT; UNITED STATES FOREST SERVICE;
    UNITED STATES DEPARTMENT OF AGRICULTURE,
    Respondents,
    MOUNTAIN VALLEY PIPELINE, LLC,
    Intervenor.
    ------------------------------
    CHEROKEE FOREST VOICES; THE CLINCH COALITION; GEORGIA
    FORESTWATCH; MOUNTAINTRUE,
    Amici Supporting Petitioner.
    2
    On Petition for Review of a Decision of the Bureau of Land Management. (VA-
    ES-058143; WV-ES-058142)
    No. 18-1036
    THE WILDERNESS SOCIETY; PRESERVE CRAIG, INC.; SAVE MONROE,
    INC.,
    Petitioners,
    v.
    UNITED STATES DEPARTMENT OF THE INTERIOR; UNITED STATES
    BUREAU OF LAND MANAGEMENT; UNITED STATES FOREST SERVICE;
    UNITED STATES DEPARTMENT OF AGRICULTURE,
    Respondents,
    MOUNTAIN VALLEY PIPELINE, LLC,
    Intervenor.
    On Petition for Review of a Decision of the Bureau of Land Management. (VA-ES-
    058143; WV-ES-058142)
    Argued: May 8, 2018                                           Decided: July 27, 2018
    Before GREGORY, Chief Judge, and TRAXLER, and THACKER, Circuit Judges.
    Petitions granted, vacated and remanded by published opinion. Judge Thacker wrote the
    opinion, in which Chief Judge Gregory and Judge Traxler joined.
    ARGUED: Nathan Matthews, SIERRA CLUB ENVIRONMENTAL LAW PROGRAM,
    Oakland, California, for Petitioners. Kevin William McArdle, UNITED STATES
    DEPARTMENT OF JUSTICE, Washington, D.C., for Respondents. George Peter
    Sibley, III, HUNTON ANDREWS KURTH LLP, Richmond, Virginia, for Intervenor.
    3
    ON BRIEF: Elizabeth Fay Benson, SIERRA CLUB ENVIRONMENTAL LAW
    PROGRAM, Oakland, California, for Petitioners Sierra Club, Wild Virginia, and
    Appalachian Voices. Tammy L. Belinsky, Copper Hill, Virginia, for Petitioners The
    Wilderness Society, Preserve Craig, and Save Monroe. Jeffrey H. Wood, Acting
    Assistant Attorney General, Eric Grant, Deputy Assistant Attorney General, J. David
    Gunter II, Emily A. Polachek, Environment & Natural Resources Division, UNITED
    STATES DEPARTMENT OF JUSTICE, Washington, D.C.; John Henson, Haninah
    Levine, Office of the Solicitor, UNITED STATES DEPARTMENT OF THE
    INTERIOR, Washington, D.C.; Jay McWhirter, Sarah Kathmann, Office of the General
    Counsel, UNITED STATES DEPARTMENT OF AGRICULTURE, Washington, D.C.,
    for Respondents. Kevin S. Elliker, HUNTON ANDREWS KURTH LLP, Richmond,
    Virginia; Thomas C. Jensen, Washington, D.C., Murray D. Feldman, Boise, Idaho,
    Sandra A. Snodgrass, HOLLAND & HART LLP, Denver, Colorado, for Intervenor. J.
    Patrick Hunter, Austin D. Gerken, Jr., Amelia Y. Burnette, Asheville, North Carolina;
    Gregory Buppert, SOUTHERN ENVIRONMENTAL LAW CENTER, Charlottesville,
    Virginia, for Amici Curiae.
    4
    THACKER, Circuit Judge:
    In this case, we address petitions seeking review of two federal agency decisions.
    The first is the Bureau of Land Management (“BLM”)’s decision granting a right of way
    through federal land for construction and operation of a pipeline proposed by Mountain
    Valley Pipeline, LLC (“MVP”). The second is the United States Forest Service (“Forest
    Service”)’s decision to amend the Jefferson National Forest Land Resource Management
    Plan to accommodate the right of way and pipeline construction. Sierra Club, Inc.;
    Appalachian Voices; Wild Virginia, Inc.; the Wilderness Society; Preserve Craig, Inc.;
    and Save Monroe, Inc. (collectively, “Petitioners”) claim that by these decisions, the
    federal agencies violated the National Environmental Policy Act (“NEPA”), the Mineral
    Leasing Act (“MLA”), and the National Forest Management Act (“NFMA”).
    After careful review, we conclude that aspects of the Forest Service’s decision fail
    to comply with NEPA and the NFMA. As more fully explained below, we grant the
    petition challenging the Forest Service’s decision and vacate that decision. We also
    conclude that the BLM failed to acknowledge its obligations under the MLA, and
    therefore, we also grant the petition challenging the BLM decision and vacate that
    decision. We remand to the respective agencies for further proceedings consistent with
    this opinion.
    5
    I.
    A.
    The Pipeline Project and FERC
    MVP plans to construct, operate, and maintain approximately 303.5 miles of new
    underground, 42-inch diameter pipeline extending from Wetzel County, West Virginia, to
    Pittsylvania County, Virginia. The trench for the pipeline will be at least 54 inches wide
    and 5.5 to 9 feet deep. Construction will involve “remov[ing] trees, shrubs, brush, roots,
    and large rocks” and will initially require a 75-foot to 125-foot right of way for
    construction purposes, and a subsequent 50-foot right of way for at least 30 years to
    accommodate the pipeline’s operation. J.A. 102–03, 107. 1
    On October 13, 2017, the Federal Energy Regulatory Commission (“FERC”)
    issued a Certificate of Public Convenience and Necessity for MVP’s pipeline project
    (“Certificate”). Pursuant to the Natural Gas Act (“NGA”), a natural gas company is not
    permitted to undertake construction of a pipeline unless FERC first issues a Certificate
    authorizing such construction. See 15 U.S.C. § 717f(c)(1)(A). Before doing so, in most
    cases FERC “shall set the matter for hearing and shall give such reasonable notice of the
    hearing thereon to all interested persons as in its judgment may be necessary under
    [FERC’s] rules and regulations.” Id. § 717f(c)(1)(B). FERC also “shall have the power
    to attach to the issuance of the certificate and to the exercise of the rights granted
    1
    Citations to the “J.A.” refer to the Corrected Deferred Joint Appendix filed by
    the parties in this appeal.
    6
    thereunder such reasonable terms and conditions as the public convenience and necessity
    may require.” Id. § 717f(e). Petitioners do not challenge FERC’s issuance of the
    Certificate in this case.
    FERC was also required to issue an Environmental Impact Statement (“EIS”). 2
    Pursuant to NEPA, when a federal agency proposes to take a “major Federal action[]
    significantly affecting the quality of the human environment,” the agency must prepare a
    detailed EIS describing the likely environmental effects, “adverse environmental effects
    which cannot be avoided,” and potential alternatives to the proposal.             
    42 U.S.C. § 4332
    (C). Multiple agencies may cooperate to issue an EIS, but a “lead agency” is
    usually designated. 
    7 C.F.R. § 3407.11
    (a). 3 Where an interstate gas pipeline is involved,
    FERC acts as the lead NEPA agency. See 15 U.S.C. § 717n(b)(1); see also EarthReports,
    Inc. v. FERC, 
    828 F.3d 949
    , 953 (D.C. Cir. 2016). Here, the BLM and the Forest Service
    served as cooperating agencies and ultimately adopted the EIS.
    2
    The issues in this case concern both the draft EIS and the final EIS. Unless
    otherwise noted, the acronym “EIS” in this opinion refers to the final Environmental
    Impact Statement issue by FERC.
    3
    This regulation provides, “If more than one Federal agency participates in a
    program activity, a lead agency shall be selected . . . . The lead agency, in full
    cooperation with all participating agencies, shall assume responsibility for involving the
    public . . . and shall prepare the EIS or shall cause the EIS to be prepared . . . .” 
    7 C.F.R. § 3407.11
    (a).
    7
    B.
    The Pipeline Project and the BLM
    It is not enough, however, that FERC issued a Certificate and an EIS. Because
    portions of the proposed pipeline route cross federally owned lands, MVP was also
    required to obtain rights of way and temporary use permits from the federal government
    to construct and operate the pipeline on those lands. The proposed right of way will cross
    land managed by two different agencies -- the Forest Service (3.6 miles or approximately
    83 acres of the Jefferson National Forest in West Virginia and Virginia) and the Army
    Corps of Engineers (60 feet of the Weston and Gauley Bridge Turnpike Trail in Braxton
    County, West Virginia) -- which means the Department of the Interior is responsible for
    issuing rights of way and attendant permits. See 
    30 U.S.C. § 185
    (c)(2) (“Where the
    surface of the Federal lands involved is administered by . . . two or more Federal
    agencies, the Secretary [of the Interior] is authorized, after consultation with the agencies
    involved, to grant or renew rights-of-way or permits through the Federal lands
    involved.”). In situations involving oil and gas pipeline rights of way, the Department of
    the Interior has delegated that authority to the BLM. See 
    36 C.F.R. § 251.54
    (b)(3).
    Importantly, the BLM must have the concurrence of the Forest Service and the Army
    Corps of Engineers in order to grant the necessary rights of way or permits. See 
    30 U.S.C. § 185
    (c)(2); 
    43 C.F.R. § 2884.26
    . 4
    4
    The Army Corps of Engineers is not a party to this case.
    8
    On December 20, 2017 -- upon review of the pertinent regulations, FERC’s EIS,
    and public comments, and with the concurrence of the Forest Service and the Corps of
    Engineers -- the BLM issued a Rule of Decision (“ROD”) granting a 30 year, 50-foot
    operational right of way and associated temporary use permits across 3.6 miles of the
    Jefferson National Forest. The BLM explicitly adopted the EIS and “prepared th[e] ROD
    based on information contained” therein. J.A. 574.
    C.
    The Pipeline Project and the Forest Service
    In addition to the Certificate, EIS, and right of way, MVP was also required to
    ensure compliance with a Land Resource Management Plan governing the Jefferson
    National Forest (the “Jefferson Forest Plan”). Pursuant to the NFMA, any plans, permits,
    or contracts for use of the Jefferson National Forest “shall be consistent with” the
    Jefferson Forest Plan. 
    16 U.S.C. § 1604
    (i). Here, it is undisputed that the pipeline
    project, as proposed, is not consistent with certain aspects of that plan. See J.A. 1280
    (Forest Service ROD: “[A]mendment [to the Jefferson Forest Plan] is needed because the
    MVP Project cannot achieve several Forest Plan standards . . . .”). In such a case, the
    Forest Service has four options:
    (1) modify the proposed project to make it consistent with the
    Forest Plan; (2) reject the proposal; (3) amend the Forest Plan
    so that the project would be consistent with the plan as
    amended; or (4) amend the Forest Plan simultaneously with
    the approval of the project so the project would be consistent
    with the plan as amended[.] [Such amendments] may be
    limited to apply only to the project.
    9
    J.A. 1271 (citing 
    36 C.F.R. § 219.15
    (c) (offering these four options if “a proposed project
    . . . would not be consistent with the application plan components”)). In its ROD filed on
    December 1, 2017, the Forest Service decided it would select option four above and
    amend the Jefferson Forest Plan such that the MVP project would be consistent with that
    plan, but those amendments would only apply to the MVP project.
    D.
    The Pipeline Project and Review of Agency Decisions
    Petitioners seek review of the BLM and Forest Service RODs, and we possess
    jurisdiction to review them pursuant to the Administrative Procedure Act, see 
    5 U.S.C. §§ 701
    –06, and the NGA, see 15 U.S.C. § 717r(d)(1) (“The United States Court of
    Appeals for the circuit in which a [natural gas] facility . . . is proposed to be constructed,
    expanded, or operated shall have original and exclusive jurisdiction over any civil action
    for the review of an order or action of a Federal agency . . . to issue, condition, or deny
    any permit, license, concurrence, or approval . . . required under Federal law . . . .”).
    II.
    We may “‘hold unlawful and set aside [a federal] agency action’ for certain
    specified reasons, including whenever the challenged act is ‘arbitrary, capricious, an
    abuse of discretion, or otherwise not in accordance with the law.’” Friends of Back Bay
    v. U.S. Army Corps of Eng’rs, 
    681 F.3d 581
    , 586–87 (4th Cir. 2012) (quoting 
    5 U.S.C. § 706
    (2)(A)).
    An agency’s decision is arbitrary and capricious if the agency
    relied on factors which Congress has not intended it to
    consider, entirely failed to consider an important aspect of the
    10
    problem, offered an explanation for its decision that runs
    counter to the evidence before the agency, or is so
    implausible that it could not be ascribed to a difference in
    view or the product of agency expertise.
    Defs. of Wildlife v. N.C. Dep’t of Transp., 
    762 F.3d 374
    , 396 (4th Cir. 2014) (quoting
    Motor Vehicle Mnfs. Ass’n v. State Farm Mut. Auto. Ins., 
    463 U.S. 29
    , 43 (1983)).
    III.
    Petitioners raise a host of alleged violations of NEPA, the NFMA, and the MLA.
    We address each of these Acts and alleged violations in turn.
    A.
    The National Environmental Policy Act
    Congress enacted NEPA, in part, “to reduce or eliminate environmental damage.”
    Dep’t of Transp. v. Pub. Citizen, 
    541 U.S. 752
    , 756 (2004). “NEPA itself does not
    mandate particular results in order to accomplish these ends,” but rather, “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.” 
    Id.
     at
    756–57 (internal quotation marks omitted). NEPA’s procedures require that agencies
    “take a hard look at environmental consequences” and “provide for broad dissemination
    of relevant environmental information.” Robertson v. Methow Valley Citizens Council,
    
    490 U.S. 332
    , 350 (1989) (internal quotation marks omitted).
    As explained above, FERC, as lead agency for natural gas pipeline projects,
    issued the EIS. Nonetheless, the Forest Service and the BLM may adopt FERC’s EIS,
    but only if the EIS “meets the standards for an adequate statement” under pertinent
    11
    regulations, 
    40 C.F.R. § 1506.3
    (a), and only if the agencies undertake “an independent
    review of the statement” and determine that their “comments and suggestions have been
    satisfied,” 
    id.
     § 1506.3(c); see also Hughes River Watershed Conservancy v. Glickman,
    
    81 F.3d 437
    , 445 & n.6 (4th Cir. 1996).
    1.
    Erosion and Sedimentation 5
    We begin with Petitioners’ argument that the Forest Service violated NEPA by
    adopting and relying upon the EIS’s analysis of erosion and sedimentation effects in the
    Jefferson National Forest. See, e.g., J.A. 1269 (Forest Service ROD “adopt[ing] the
    environmental analysis prepared by FERC”); id. at 1274 (“All design features and
    mitigation measures described in the []EIS that are applicable to N[ational] F[orest]
    S[ervice] land are incorporated by reference into [the ROD].”). Specifically, Petitioners
    contend that the “EIS is invalid[.] [It] fails to take the required hard look at impacts
    within Jefferson National Forest.” Pet’rs’ Br. 2. 6
    5
    Erosion is defined as the “removal of surface material from the Earth’s crust,
    primarily soil and rock debris, and the transportation of the . . . materials by natural
    agencies (such as water or wind) from the point of removal.” Erosion, Encyclopaedia
    Brittanica: Geology, https://www.britannica.com/science/erosion-geology (enclosed as
    PDF attachment). Sedimentation is defined as the “process of deposition of a solid
    material,” or sediment, “from a state of suspension or solution in a fluid,” here, the
    waters in the vicinity of the Jefferson National Forest. Sedimentation, Encyclopaedia
    Brittanica:     Geology,      https://www.britannica.com/science/sedimentation-geology
    (enclosed as PDF attachment).
    6
    We decline to address any arguments by Petitioners that seek to challenge
    FERC’s actions in composing the EIS. FERC is not a party to this case, and such
    challenges are being made elsewhere, via the FERC rehearing process, see FERC-CP 16-
    (Continued)
    12
    a.
    The Hydrologic Report
    In assessing the impacts of erosion and sedimentation that would occur as a result
    of pipeline construction and operation in the Jefferson National Forest, FERC relied on a
    report entitled “Hydrologic Analysis of Sedimentation,” see J.A. 234–36, which was
    prepared by MVP and attached to the EIS, see id. at 297–327 (Appendix O–3) (the
    “Hydrologic Report”).
    There were three drafts of the Hydrologic Report. The first was completed on
    June 7, 2016, and released to the public on July 25, 2016. See J.A. 1311–26. Although
    that report observed that pipeline construction in the Jefferson National Forest “has
    potential to introduce temporary excess sediment into waterways . . . which may result in
    changes to water quality and potentially temporarily impact aquatic biota,” id. at 1313, it
    also noted that the results in the analysis “represent[ed] a worst case scenario” because
    the first draft did not address erosion and sediment control measures or best management
    practices (“BMP”s) that would reduce sedimentation effects, id. at 1324. The Forest
    Service promptly filed comments to the first draft on August 16, 2016. One of its main
    concerns was that the draft “treats the [sedimentation] disturbance as a single-year
    10-000, and in the D.C. Circuit, see Appalachian Voices v. FERC, No. 17-1271 (D.C. Cir.
    filed Dec. 22, 2017). In this matter, we address only the arguments that the Forest
    Service and the BLM failed to comply with applicable regulations in adopting and
    relying upon the EIS.
    13
    occurrence.” Id. at 1330. It asked MVP to “estimate when (if ever) sediment yields
    return to pre-disturbance levels.” Id.
    MVP then submitted a second draft of the Hydrologic Report on March 3, 2017.
    See J.A. 297–327. It addressed the Forest Service’s concern and explained that sediment
    yields would reach a “new sediment equilibrium” within approximately four to five years
    from the start of the project, which for “the majority of streams” would represent one
    percent or less increase in sedimentation load over baseline conditions. Id. at 323. But it
    also predicted a new sediment equilibrium in excess of 10 percent over baseline for
    “several streams within the New River drainage.” Id.
    The second draft also considered BMPs and containment measures such as
    sediment basins, traps, and barriers, 7 and it attempted to determine a proper estimate of
    reduction in sediment load expected from those measures. It explained that “performance
    estimates vary widely among studies with some estimates as low as 55 percent . . . [and
    some] as high as 99 percent.” J.A. 310. The second draft of the report also cited to a
    2007 study from the Environmental Protection Agency (“EPA”), which concluded that
    with the use of sediment basins, “annual average sediment reductions ranged from 77 to
    93 percent.” Id. The second draft cited still another study, a 2014 Master’s thesis
    7
    Sediment basins and traps “are designed to promote settling of sediment by
    reducing flow velocities.” J.A. 310. Sediment barriers, such as silt fences, “are installed
    to intercept and detain sediment from disturbed areas and to decrease the velocity of sheet
    flows.” Id. at 311. Sheet flow is when water “flow[s] overland as a sheet instead of in
    definite channels or rills.”      Sheet erosion, Encyclopaedia Britannica: Geology,
    https://www.britannica.com/science/sheet-erosion (enclosed as PDF attachment).
    14
    examining sediment barriers “evaluated containment at a variety of slopes and rainfall
    events and found that overall average projected performance efficiency ranged from 48 to
    87 percent with a mean and median of 79 and 86 percent, respectively.” Id. at 311. In
    light of this data, the second draft concluded that 79% containment would be a proper
    figure to use “to model the benefits of erosion and sediment control practices” expected
    for the pipeline project. Id.
    The second draft also grappled with setting a proper exceedance threshold for
    impact of sedimentation on waterbodies. Ultimately, it decided to utilize a “commonly
    used impact threshold” of 10% “to assess potential changes associated with
    sedimentation.” J.A. 314–15. It then delineated streams and downstream waterbodies
    within the vicinity of the pipeline route with expected sediment loads or sediment
    increases of “10 percent or greater.” Id. at 319, 322. Initially, the Forest Service
    expressed concern with this analysis, especially with regard to Threatened and
    Endangered Species (“TES”).      At an April 6, 2017 meeting with consultants who
    composed the report, Forest Service officials expressed concern that “organisms respond
    differently to increases in sedimentation, and a 10% impact threshold to determine when
    impacts would occur is likely not relevant.” Id. at 1357–58.
    The Forest Service filed comments to the second draft on April 25, 2017, and
    conveyed apprehension with both the 79% and 10% figures. It explained:
    • “Since many of the literature citations [offered in the second
    draft] are laboratory based and proper installation is widely
    understood in the industry to be a limiting factor for
    effectiveness in the field, [79%] is a vast overestimate of
    containment. It is more appropriate to err on the side of the
    15
    worst case scenario, rather than the best case. Update the
    analysis to reflect a . . . factor, equal to or less than 48%
    containment.” J.A. 1361.
    • “The commonly used threshold of 10% may be a valid
    assumption for [areas that] meet[] water quality standards or
    do not contain sensitive aquatic biota. However, in
    downstream areas where TES aquatic species are present, it
    is important to further evaluate cumulative impacts less than
    10% increase in sediment load, particularly if construction
    may coincide with low flow conditions. . . . Update the
    analysis to include cumulative effects delineation for Stony
    Creek and Craig Creek [both of which contain TES], and
    track updates (where appropriate) in the tables and figures.”
    J.A. 1362. The Forest Service also explained, “If there are
    impacts to sensitive species the F[orest] S[ervice] must
    analyze the significance of adverse effects on the
    populations, its habitat, and on the viability of the species as
    a whole.” Id.
    After the Forest Service filed these comments, representatives of the Forest
    Service and MVP met on May 9, 2017, to discuss the Forest Service’s concerns. During
    that meeting, MVP representatives expressed “concern[] that lowering the containment
    value from 79% to 48% . . . would have ramifications for the entire project analysis and
    would not accurately reflect the work that MVP has already done.” J.A. 1363 (emphasis
    supplied). A representative from Environmental Solutions & Innovations, the company
    that completed the Hydrologic Report, explained that “the 79% containment figure was
    based on a field test thesis paper study,” and thus, was not strictly laboratory based. Id.
    In turn, the Forest Service urged MVP to provide “additional supporting
    documentation for how MVP came up with their model assumptions, in particular
    containment efficiency.” J.A. 1363. One of the Forest Service officials “stressed” that
    16
    “good plans aren’t enough and must be bolstered by consistent monitoring and accurate
    implementation.” Id. at 1364.
    On June 21, 2017, MVP responded to the Forest Service’s concerns with the
    second draft of the Hydrologic Report, and submitted a third and final Hydrologic
    Report. See J.A. 1374–81 (response to comments), 1384–1420 (final draft), 1422–37
    (appendix with methods used in final analysis). As to the Forest Service’s sedimentation
    concerns, MVP sent the Forest Service copies of the following studies: The Performance
    Evaluation of Two Silt Fence Geosynthetic Fabrics During and After Rainfall Event, the
    2014 Master’s thesis mentioned above by Gregg Steven Dubinski; a turbidity monitoring
    study completed by the United States Geological Survey; details regarding site specific
    erosion control measures along Craig Creek; and “additional details supporting various
    aspects of the analysis.” J.A. 1377–78. It also responded to the Forest Service comments
    as follows:
    • The 79% containment value: The studies provided to the
    Forest Service “use both field and laboratory investigations
    . . . to provide a range of efficiencies that are reasonably
    attainable. The 79% containment is not the best-case
    scenario, but rather the mean reported value for both silt
    fences and compost filter socks, two predominant controls
    proposed to be used on the [pipeline right of way].” J.A.
    1378.
    • The 10% sedimentation threshold value: The Hydrologic
    Report “explains that no nationally accepted sedimentation
    standard or exceedance threshold for sediment is available.
    The level of 10 percent was chosen because it was a
    commonly used impact threshold for sediment metrics in a
    review conducted by the [EPA]. Additional detail is
    provided in Section 2.6 of the [Hydrologic Report].” J.A.
    1381. Section 2.6 of the third Hydrologic Report, in turn,
    17
    contains a soil loss and sediment delivery analysis, and
    explains that “[f]rom a sensitive-species perspective, a 10
    percent increase over background would likely be within
    the normal variance experienced in a stream system” and
    “natural variation in streams is relatively high”; thus,
    “detecting sediment increases in streams is fairly difficult.”
    Id. at 1405.
    The very next day, June 22, 2017, FERC released the EIS, which incorporated and
    relied upon the second draft of the Hydrologic Report. 8 Specifically, the EIS stated the
    following:
    • In the commentary process, the Forest Service expressed
    concern “regarding the potential for increased
    sedimentation caused by erosion of exposed soil . . . to
    affect the waterbodies crossed by the [pipeline] within the
    Jefferson National Forest and impact downstream
    resources.” J.A. 234.
    • To address these concerns, MVP “commissioned a
    sedimentation model to assess the extent of sedimentation
    that could occur during construction within [certain]
    subwatersheds that intersect the Jefferson National Forest
    boundaries and the project area.” J.A. 234–35.
    • This “model” resulted in the conclusion that catchments in
    certain subwatersheds “would likely experience increases
    in sediment yield over baseline conditions during
    construction, restoration, and operation.” J.A. 235. Such
    sedimentation “would likely be transported into
    downstream waterbodies.” Id.
    • The model also indicated that “construction could increase
    sedimentation, when accounting for [MVP’s] erosion and
    sediment control methods, by more than 10 percent along
    sections of Craig Creek and [certain other headwater
    8
    The third and final draft of the Hydrologic Report became available on FERC’s
    docket on June 30, 2017.
    18
    streams and tributaries, and subwatersheds].” J.A. 235.
    Impacts on the streams would be “greatest during the
    active construction phase of the project.” Id.
    • Although the Hydrologic Report suggested that sediment
    loads would reach a “new sediment equilibrium” of one
    percent or less increase in sediment load within
    approximately four to five years, it also predicted “a new
    sediment equilibrium in excess of 10 percent over baseline
    for streams within [two certain] subwatersheds.” J.A.
    235.
    Nearly six months later, the Forest Service issued its ROD, adopting the EIS, and
    presumably relying on the third and final Hydrologic Report. Of note, the Forest Service
    did not provide any discussion as to how its concerns with regard to the second draft had
    been alleviated, and did not explain how the EIS was an adequate statement even though
    it relied on the second draft, not the third. The ROD states merely, “Forest Service
    hydrology and aquatic biology specialists reviewed the [Hydrologic Report] and . . .
    enlisted expertise from local, certified consultants to validate results.” J.A. 1279.
    b.
    Forest Service’s Adoption of the EIS’s Analysis
    The Forest Service may adopt FERC’s EIS only if it undertakes “an independent
    review of the [EIS]” and “concludes that its comments and suggestions have been
    satisfied.” 
    40 C.F.R. § 1506.3
    (c). It must also ensure that the EIS is “adequate” under
    NEPA regulations. 
    Id.
     § 1506.3(a); see also Hughes River Watershed, 
    81 F.3d at
    445 &
    n.6. Our responsibility is to “determine whether the [agency] has considered the relevant
    factors and articulated a rational connection between the facts found and the choice
    made.” Balt. Gas & Elec. Co. v. Nat. Res. Def. Council, Inc., 
    462 U.S. 87
    , 105 (1983).
    19
    The agency’s decision is arbitrary and capricious if it “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.” Defs. of Wildlife, 762 F.3d at 396 (internal
    quotation marks omitted).
    i.
    Independent Review and Comments Satisfied?
    First, we discern no evidence that the Forest Service undertook the required
    independent review of the EIS’s sedimentation analysis. Nor can we ascertain how the
    Forest Service concluded that its comments had been satisfied, especially after having
    expressed such grave concerns about the sedimentation impact and containment figures
    presented in the second draft of the Hydrologic Report. The Forest Service suggests the
    written comments from MVP after the second draft, and the Forest Service’s ROD
    months later, demonstrate that the concerns had been alleviated. See Resp’ts’ Br. 38.
    MVP counsel likewise explained at oral argument, “[T]he court can certainly discern the
    rationale” for the Forest Service’s ultimate acquiescence to the 79% figure. Oral
    Argument at 39:37–40, Sierra Club v. Forest Service, No. 17-2399 (May 8, 2018)
    (hereinafter “Oral Argument”); see also Intervenor’s Br. 19.
    But we certainly cannot discern the Forest Service’s rationale because, as MVP
    counsel admitted at argument, “[The Forest Service] doesn’t say in the record specifically
    that [its proposed 48% figure] is incorrect.” Oral Argument at 39:33–36. Indeed, the
    Forest Service expressed nothing but skepticism of the 79% figure for more than three
    months. In fact, the Forest Service proposed the 48% figure as a ceiling, rather than a
    20
    floor or even a desired target, for sediment containment. See J.A. 1361 (proposing a
    figure “equal to or less than 48% containment”). Given the circumstances, we simply
    cannot conclude that the Forest Service undertook an independent review and determined
    that its comments and concerns were satisfied when it shifted from a 48% ceiling to 79%
    with absolutely no explanation. See 
    40 C.F.R. § 1506.3
    (c). This shift is particularly
    concerning in light of MVP’s commentary at the May 9 meeting that using the 48%
    figure would have “ramifications for the entire project analysis.” 
    Id. at 1363
    . MVP’s
    counsel attempted to curb this statement at argument. See Oral Argument at 35:55–36:01
    (The “ramifications . . . would be to challenge basic practice for dealing with construction
    related impacts.”). But a more logical way to interpret the statement is that MVP was
    troubled that using the 48% figure would undercut other studies and numbers supporting
    the project, causing the entire project to fail or be delayed.
    Moreover, MVP’s June 21, 2017 comments do not support the Forest Service’s
    change in position. For example, in response to concerns about the 79% containment
    figure, MVP states that the figure “is not the best-case scenario, but rather the mean
    reported value for both silt fences and compost filter socks, two predominant controls
    proposed to be used on the [pipeline right of way].” J.A. 1384. Significantly, the Forest
    Service already knew this. See 
    id. at 311
     (second draft of Hydrologic Report: “Th[e]
    [79%] value is chosen because it is the mean reported value for both silt fences and
    compost filter socks.”). In response to both the 79% figure and the 10% sedimentation
    impact threshold, MVP’s June 21 comments list the Dubinski thesis, one government
    turbidity study, “details” about erosion control on Craig Creek, and “additional support”
    21
    that MVP provided to the Forest Service to further explain its rationale. 
    Id.
     at 1368–69,
    1372. But critically, the Forest Service ROD does not explain how these materials
    support the metrics used in the Hydrologic Report, or how they assuage the Forest
    Service’s earlier concerns about TES in the above-threshold subwatersheds.
    As to the 10% figure for sediment increase above baseline measures, the EIS
    explains that even when “accounting for [MVP’s] erosion and sediment control
    methods,” construction could increase sedimentation “by more than 10 percent along
    sections of Craig Creek and [other certain headwater streams, tributaries, and
    subwatersheds].” J.A. 235 (emphasis supplied). The EIS also explains that “a new
    sediment equilibrium in excess of 10 percent over baseline for streams within [two
    certain] subwatersheds” would occur as a result of the project. 
    Id.
     (emphasis supplied).
    Yet the Forest Service does not address these points in adopting the EIS, even though it
    earlier explained that (1) “organisms respond differently to increases in sedimentation,
    and a 10% impact threshold to determine when impacts would occur is likely not
    relevant,” 
    id.
     at 1357–58; and (2) if increase in sediment load leads to “impacts to
    sensitive species,” the Forest Service “must analyze the significance of adverse effects on
    the populations, its habitat, and on the viability of the species as a whole,” 
    id. at 1362
    .
    Indeed, the Forest Service asked MVP to further evaluate the impacts on TES of less than
    10% over the sedimentation baseline, but in response, MVP simply stated that a 10%
    increase “would likely be within the normal variance experienced in a stream system,”
    and “detecting sediment increases in streams is fairly difficult.” J.A. 1405.
    22
    ii.
    Remand to the Forest Service
    Pursuant to NEPA, we conclude the Forest Service acted arbitrarily and
    capriciously in adopting the sedimentation analysis in the EIS. It did not “articulate[] a
    rational connection between the facts found and the choice made.” Balt. Gas & Elec.,
    
    462 U.S. at 105
    . By MVP counsel’s own admission, there is no statement in the ROD
    explaining the Forest Service’s abandonment of its earlier concerns. See Oral Argument
    at 39:33–36 (“[The Forest Service] doesn’t say in the record specifically that [its
    proposed 48% figure] is incorrect.”). Its decision also “runs counter to the evidence
    before the agency.” Defs. of Wildlife, 762 F.3d at 396 (internal quotation marks omitted).
    Leading up to the filing of the EIS, the Forest Service expressed steadfast concerns about
    the figures proposed by the Hydrologic Report. But it is not clear whether and how
    MVP’s comments and the studies and reports it provided to the Forest Service alleviated
    those concerns. Finally, FERC incorporated the second draft of the Hydrologic Report in
    the EIS, even though the third and final draft was issued the previous day. There is also
    no indication FERC considered the third draft at all, yet the Forest Service adopted the
    EIS anyway.
    Upon remand, the Forest Service should explain its assent to the 79% and 10%
    figures, and also explain how the EIS took a “hard look” at the sedimentation issues
    discussed here considering its reliance on a superseded report with which the Forest
    Service had grave concerns. If supplemental analysis is needed, i.e., regarding the effect
    of aquatic TES, the agency should perform that analysis as well.
    23
    2.
    Forest Effects
    Petitioners also contend that the BLM and Forest Service violated NEPA because,
    in adopting the EIS, they did not consider the impact on the forests in considering
    alternative routes and plans. For example, they argue the BLM and the Forest Service
    did not consider whether the core forests through which the right of way passes would
    still be part of a contiguous forest patch, or whether alternative routes “would reduce
    visual or scenic impacts.” Pet’rs’ Br. 40. They claim “[m]ore nuanced analyses could
    have addressed other elements of forest quality, such as the shape or ‘depth’ of forest
    patches.” Id. at 36. Thus, Petitioners contend the BLM and Forest Service did not
    recognize that the EIS “fails to justify its conclusion” that none of the alternative routes
    offers a significant environmental advantage. Id. at 43.
    We conclude that Petitioners have not met their “demanding burden” on this issue.
    Almy v. Sebelius, 
    679 F.3d 297
    , 307 (4th Cir. 2012). NEPA requires that agencies
    reasonably evaluate a right of way’s impacts on forests and “candidly acknowledge[] its
    risks.” Webster v. U.S. Dep’t of Agric., 
    685 F.3d 411
    , 429 (4th Cir. 2012). “It is of
    course always possible to explore a subject more deeply and to discuss it more
    thoroughly.” Coal. on Sensible Transp., Inc. v. Dole, 
    826 F.2d 60
    , 66 (D.C. Cir. 1987).
    The BLM and the Forest Service, through their respective RODs, sufficiently explained
    their methodology and identified the competing factors they weighed in reaching their
    conclusion. They also considered viable alternatives and explained why they are not
    appropriate.
    24
    The agencies likewise did not “entirely fail[] to consider an important aspect of the
    problem.” Defs. of Wildlife, 762 F.3d at 396. The EIS indicated that the proposed right
    of way would transform approximately 336 acres of adjacent “interior forest” habitat into
    “forest edge” habitat. 9 J.A. 210. The EIS noted that interior forest “has a higher habitat
    value for some wildlife species, and is generally considered rarer than forest edges which
    have lower habitat value for many species and can be created immediately with
    disturbance.” Id. at 195. It also discussed the pipeline’s potential to fragment interior
    forests. See id. at 224–26. A diagram in the EIS also demonstrates that the proposed
    right of way would transect three core forests that Virginia has rated as having
    “outstanding” or “very high” ecological value. Id. at 199.
    The EIS and the BLM’s ROD also discuss four alternatives to the proposed
    pipeline route, and they specifically address the impact on forest fragmentation. For
    example, Alternative 1, which would be collocated with existing electrical transmission
    lines for around 70 more miles than the proposed route, also “crosses 1.9 fewer miles of
    [National Forest Service] lands, . . . and would impact less interior forest” compared to
    the proposed route. J.A. 604. However, it would also be 20 miles longer, “potentially
    disturbing 336 more acres, and 90 more parcels.” Id. Hybrid Alternative 1A, which
    would cross the forest in a different location, would “be substantially collocated with
    various overhead electric transmission lines,” and would cross 1.8 fewer miles of the
    9
    “Interior forest” is defined in the EIS as “forested areas greater than 300 feet
    from the influence of forest edges or open habitat.” J.A. 195.
    25
    Jefferson National Forest and five fewer miles with landslide potential. But it would also
    increase the length of the pipeline by six miles, affect 28 more landowners, and cross 22
    more perennial streams and two more major waterbodies. Id. Hybrid Alternative 1B
    would reduce impacts on interior forests, but would increase the length of the pipeline by
    almost 15 miles and increase the “overall project disturbance.” Id. at 605. And the
    Atlantic Coast Pipeline Collocation Alternative, which would involve the installation of
    the MVP pipeline adjacent to the proposed pipeline route for the Atlantic Coast pipeline
    project, would affect less interior and old growth forest compared to the proposed route.
    But that option would cross 15.6 more miles of Forest Service land, and in many areas,
    there is insufficient space to run the pipelines beside each other, so construction would
    require side slope construction techniques and additional acres of disturbance. The EIS
    also discussed how collocation is desirable because it reduces forest fragmentation. See
    id. at 225 (explaining that collocating the pipeline with an existing right of way “reduces
    the amount of fragmentation and new edges by shifting the existing forest edge as
    opposed to creating a completely new corridor”).
    As for visual impact, the agencies considered this as well, including “potential
    visual impacts . . . both at the [Appalachian Trail] crossing location and from more
    distant viewpoints.”   J.A. 152. The EIS acknowledged, however, that a “buffer of
    undisturbed forest on either side of the trail . . . would substantially reduce visual
    impacts.” Id. at 153. The EIS also recognized “[o]ther visual effects could result from
    the removal of large individual trees that have intrinsic aesthetic value.” Id. at 259. But
    26
    it also explained measures for ‘minimizing visual effects” and “reducing long-term
    impacts of the permanent right-of-way.” Id. at 271.
    In sum, perhaps the agencies’ analysis could have been more “nuanced,” but the
    agencies did not “entirely fail[] to consider an important aspect of the problem,” and their
    decision was not “implausible.” Defs. of Wildlife., 762 F.3d at 396. We thus defer to the
    agencies’ conclusions on the issue of forest effects.
    3.
    Meaningful Analysis
    As explained above, an agency may only adopt an EIS if it “meets the standards
    for an adequate [EIS]” under NEPA regulations. 
    40 C.F.R. § 1506.3
    (a). One applicable
    regulation applies to Draft Environmental Impact Statements (“DEIS”) and provides:
    If a [DEIS] is so inadequate as to preclude meaningful
    analysis, the agency shall prepare and circulate a revised draft
    of the appropriate portion. The agency shall make every
    effort to disclose and discuss at appropriate points in the
    [DEIS] all major points of view on the environmental impacts
    of the alternatives, including the proposed action.
    
    40 C.F.R. § 1502.9
    (a) (emphasis supplied).          In addition, “[n]o material may be
    incorporated by reference unless it is reasonably available for inspection by potentially
    interested persons within the time allowed for comment.” 
    Id.
     § 1502.21. Petitioners
    contend that the DEIS precluded meaningful comment because (1) it failed to address the
    efficacy of MVP’s Erosion and Sediment Control Plan (the “Control Plan”); (2) its
    description of the project’s purpose and need precluded meaningful analysis; (3) it did
    not adequately analyze or weigh impacts on forests. See Pet’rs’ Br. 25–29. Therefore,
    27
    Petitioners’ claim, the agencies should not have adopted the EIS. We reject each of these
    arguments.
    a.
    Time for Comment
    First, a DEIS must not be “so inadequate as to preclude meaningful analysis,” and
    any referenced material should be made available “within the time allowed for
    comment.” 
    40 C.F.R. §§ 1502.9
    (a), 1502.21. The Control Plan was publicly available on
    the FERC docket during the DEIS comment period. Indeed, Petitioners filed six pages of
    comments on sedimentation issues at the DEIS stage, including a critique of the Control
    Plan itself. Petitioners have not demonstrated that “omissions in the DEIS left the public
    unable to make known its environmental concerns about the project’s impact.” Nat’l
    Comm. for the New River v. FERC, 
    373 F.3d 1323
    , 1329 (D.C. Cir. 2004).
    b.
    Project’s Purpose
    Second, a DEIS “shall briefly specify the underlying purpose and need to which
    the agency is responding in proposing alternatives including the proposed action.” 
    40 C.F.R. § 1502.13
    . We have explained, “The statement of a project’s purpose and need is
    left to the agency’s expertise and discretion, and we defer to the agency if the statement is
    reasonable.” All. for Legal Action v. F.A.A., 69 F. App’x 617, 622 (4th Cir. 2003) (per
    curiam) (citing Friends of Se.’s Future v. Morrison, 
    153 F.3d 1059
    , 1066–67 (9th Cir.
    1998)). We further explained that we should consider “the nature of the proposed federal
    action” informed by “the project sponsor’s goals,” as well as “the goals that Congress has
    28
    set for the agency.” 
    Id.
     On the flip side, “a purpose is unreasonable when the agency
    defines it so narrowly as to allow only one alternative from among the environmentally
    benign ones in the agency’s power, such that the EIS becomes essentially a foreordained
    formality.” Webster, 685 F.3d at 422 (internal quotation marks omitted). It may also be
    unreasonable “if the agency draws [the purpose] so broadly that an infinite number of
    alternatives would accomplish” the project’s goals.         Id. (internal quotation marks
    omitted).
    Here, the DEIS explained:
    In general, as described by the Applicants, the purpose of . . .
    the MVP . . . is to transport natural gas produced in the
    Appalachian Basin to markets in the Northeast, Mid-Atlantic,
    and Southeastern United States. Specifically, the MVP would
    deliver the identified gas volumes (2 Bcf/d) to five contracted
    shippers via a pooling point at Transco Station 165 in
    Pittsylvania County, Virginia . . . .
    J.A. 4. It is not clear whether Petitioners are arguing that this statement is too narrow or
    too broad.    Nonetheless, we conclude the statement allows for a wide range of
    alternatives but is narrow enough (i.e., it explains where the gas must come from, where
    it will go, how much it would deliver) that there are not an infinite number of
    alternatives. It also reflects the goals Congress set forth in the Natural Gas Act, which
    bestows upon FERC the “power to perform any and all acts . . . to carry out the
    provisions of” the NGA in the transportation of natural gas in interstate commerce. 15
    U.S.C. § 717o; see also id. § 717(b). Although Petitioners would like more detail,
    specifically about the precise final destination of the gas transported through the pipeline,
    29
    they have not sufficiently explained how the absence of that detail precluded meaningful
    analysis of the DEIS.
    c.
    Opportunity to Respond
    Third, Petitioners also believe the DEIS did not adequately analyze or weigh
    impacts on forests, and they lacked a meaningful opportunity to respond to an impacts
    analysis. However, the DEIS does discuss the project’s potential to convert interior
    forest to edge forest and to fragment interior forests. See, e.g., J.A. 3, 38–44, 47–49.
    Indeed, Petitioners and others submitted detailed comments on these edge effects and
    fragmentation. See, e.g., id. at 471–75. Clearly, then, there was an opportunity for
    meaningful comment and review, and Petitioners took advantage of it.
    4.
    Alternatives
    Petitioners’ next NEPA argument is that the Forest Service’s ROD is deficient
    because it does not discuss all alternatives examined in FERC’s EIS.           Rather, it
    “unlawfully limited its analysis to only two alternatives: MVP’s proposal and the ‘no
    action’ alternative.” Pet’rs’ Br. 60 (citing J.A. 1291). Petitioners claim “[t]his cabined
    analysis violates the Forest Service’s obligation to ‘rigorously explore and objectively
    evaluate all reasonable alternatives.’” Id. at 60–61 (quoting 
    40 C.F.R. § 1502.14
    (a))
    (emphasis in brief).
    NEPA regulations require that a ROD “[i]dentify all alternatives considered by the
    agency in reaching its decision, specifying the alternative or alternatives which were
    30
    considered to be environmentally preferable.” 
    40 C.F.R. § 1505.2
    (b).       The EIS shall
    “[r]igorously explore and objectively evaluate all reasonable alternatives,” and “[d]evote
    substantial treatment to each alternative considered in detail including the proposed
    action so that reviewers may evaluate their comparative merits.” 
    Id.
     § 1502.14(a), (b).
    Here, while the Forest Service ROD does not have a separate section addressing
    alternatives, it nonetheless adopts the EIS’s conclusion that the “proposed route
    minimizes the totality of impacts across federal and non-federal lands,” J.A. 1288, and
    “[t]he alternatives and variations considered were either not technically feasible or did
    not result in significant environmental advantage over the corresponding proposed route,”
    id. at 1289.
    NEPA regulations require the EIS -- not the ROD -- to “[r]igorously explore and
    objectively evaluate all reasonable alternatives” to the proposed action.      
    40 C.F.R. § 1502.14
    (a). Therefore, the Forest Service did not act arbitrarily in failing to tick
    through each alternative and the reasons for rejecting them. By adopting the EIS and
    rendering its decision, it sufficiently “identified” all alternatives considered and
    “specified” that the preferred route was environmentally preferable. Id.. § 1505.2(b). In
    the end, the Forest Service was tasked with determining whether to amend its Forest Plan,
    and whether to join in the BLM’s decision to grant a right of way. It was not tasked with
    approving the project as a whole -- nor could it be under the Natural Gas Act. Therefore,
    this argument fails.
    Petitioners also contend that the Forest Service and the BLM acted arbitrarily by
    “conclud[ing] that the no action alternative would not offer environmental benefits.”
    31
    Pet’rs’ Br. 63. But the premise underlying this argument is false. In fact, the EIS
    acknowledges that “[c]ompared to the proposed action, the no action alternative would
    offer a significant environmental advantage.” J.A. 116 (emphasis supplied). We reject
    this argument as well.
    B.
    The National Forest Management Act
    We turn next to Petitioners’ arguments under the NFMA. This Act “establishes a
    two-step procedure for managing National Forest System lands.” Am. Wild Horse Pres.
    Campaign v. Perdue, 
    873 F.3d 914
    , 919 (D.C. Cir. 2017). First, the Forest Service must
    “develop, maintain, and, as appropriate, revise [Forest Plans],” which provide a
    framework for where and how certain activities can occur in national forests. 
    Id.
     (quoting
    
    16 U.S.C. § 1604
    (a)); see also Sierra Club v. Robertson, 
    28 F.3d 753
    , 758 (8th Cir.
    1994). Second, the Forest Service must “ensure that all ‘[r]esource plans and permits,
    contracts, and other instruments for the use and occupancy of National Forest System
    lands’ . . . are ‘consistent with the Forest Plans.’” 
    Id.
     (quoting 
    16 U.S.C. § 1604
    (i))
    (alteration omitted).
    The NFMA also provides a process for developing, revising, and amending Forest
    Plans. It charges the Department of Agriculture with promulgating guidelines for Forest
    Plans, which should, inter alia, “insure consideration of the economic and environmental
    aspects of various systems of renewable resource management,” and “provide for
    diversity of plant and animal communities based on the suitability and capability of the
    specific land area.” 
    16 U.S.C. § 1604
    (g)(3)(A)–(B).
    32
    1.
    The 2012 Planning Rule
    Under the authority bestowed by the NFMA, the Forest Service has promulgated
    regulations for all Forest Plans. See 
    36 C.F.R. § 200.3
    (b) (Secretary of Agriculture
    delegating authority under the NFMA to the Forest Service). In 2012, the Forest Service
    issued the regulations at the heart of this appeal. See Nat’l Forest Sys. Land Mgmt.
    Planning, 
    77 Fed. Reg. 21162
     (April 9, 2012) (the “2012 Planning Rule”). The 2012
    Planning Rule allows forest plans to be amended “at any time.” 
    36 C.F.R. § 219.13
    (a).
    When promulgated, the 2012 Planning Rule stated that amendments to forest plans
    should occur “consistent with the Forest Service NEPA procedures.” 
    Id.
     § 219.13(b)(3)
    (2012). But it did not elaborate further, which led to “confusion about how responsible
    officials should apply the substantive requirements for sustainability, diversity, multiple
    use and timber set forth in [the 2012 Planning Rule] when amending [earlier] plans.”
    Nat’l Forest Sys. Land Mgmt. Planning, 
    81 Fed. Reg. 70373
    -01, at 70374–75 (Oct. 12,
    2016).
    To resolve this confusion, the Forest Service further revised portions of the 2012
    Planning Rule in 2016 (the “2016 Revisions”). 10        Specifically, the 2016 Revisions
    provide that the Forest Service “shall . . . [d]etermine which specific substantive
    requirement(s) within §§ 219.8 through 219.11 are directly related to the plan direction
    10
    The 2016 Revision took effect Jan. 17, 2017, after initiation of the proceedings
    at issue here. The Forest Service agrees that its final decision was required to comply
    with the revised rule. See J.A. 1272.
    33
    being added, modified, or removed by the amendment,” and then “apply such
    requirement(s) within the scope and scale of the amendment.” 
    36 C.F.R. § 219.13
    (b)(5)
    (emphasis supplied). Conversely, “[t]he responsible official is not required to apply any
    substantive requirements within §§ 219.8 through 219.11 that are not directly related to
    the amendment.” Id. (emphasis supplied).
    Thus, the issue we consider here turns on whether the requirements in the 2012
    Planning Rule are directly related to the instant Forest Service amendments to the
    Jefferson Forest Plan.
    2.
    The Jefferson Forest Plan Amendments
    In its ROD, the Forest Service explained that it decided to amend the Jefferson
    Forest Plan standards, but only for the limited purpose of construction and operation of
    the MVP pipeline. It made amendments in five categories to accommodate the project:
    (1) utility corridors; (2) soil and riparian; (3) old growth management; (4) Appalachian
    Trail area; (5) and scenic integrity. 11 See J.A. 1274–76. For example, following is an
    amendment set forth in the Forest Service ROD, with the bold language applicable only
    for purposes of the MVP pipeline project:
    Standard FW-5: On all soils dedicated to growing vegetation,
    the organic layers, topsoil and root mat will be left in place
    over at least 85% of the activity area and revegetation is
    accomplished within 5 years, with the exception of the
    operational right-of-way and the construction zone for the
    11
    Petitioners only challenge the soil and riparian category on this issue.
    34
    Mountain Valley Pipeline, for which the applicable [MVP
    proposed] mitigation measures . . . must be implemented.
    Id. at 1274. There are similar Forest Plan standards from which the MVP project is
    exempt, including: (1) no heavy equipment can be used on plastic soils when the water
    table is within 12 inches of the surface or when soil moisture exceeds the plastic limit;12
    (2) heavy equipment is operated so that soil indentations, ruts, or furrows are aligned on
    the contour, and the slope of such indentations is 5% or less; (3) management activities
    expose no more than 10% mineral soil in the channeled ephemeral zone; 13 (4)
    management activities expose no more than 10% mineral soil within the project area
    riparian corridor. 14
    12
    Plastic soils are soils that exhibit plastic properties and “will deform without
    shearing (typically silts or clays).” Plastic Soil, Vocabulary Catalog, Environ. Prot.
    Agency, https://iaspub.epa.gov/sor_internet/registry/termreg/searchandretrieve/glossaries
    andkeywordlists/search.do?details=&vocabName=UST%20Technical%20Terms, Page 5
    of 7 (enclosed as PDF attachment).
    13
    An ephemeral stream “has flowing water only during, and for a short duration
    after, precipitation events in a typical year. Ephemeral stream beds are located above the
    water table year-round. Groundwater is not a source of water for the stream. Runoff
    from rainfall is the primary source of water for stream flow.” Ephemeral Stream,
    Glossary, Environ. Prot. Agency, https://www.epa.gov/sites/production/files/2016-
    02/documents/realestate_glossary.pdf (enclosed as PDF attachment).
    14
    Riparian areas are “lands adjacent to streams, lakes, and estuarine-marine
    shorelines. Riparian areas are transitional between terrestrial and aquatic ecosystems,
    through which surface and subsurface hydrology connects water bodies with their
    adjacent     uplands.”         Riparian,    Glossary,     Environ.     Prot.     Agency,
    https://www.epa.gov/sites/production/files/2016-02/documents/realestate_glossary.pdf
    (enclosed as PDF attachment). A riparian corridor, on the other hand, is a Forest Service
    designated prescription area that includes the area in and around water, including the
    highest water mark and around the perimeter of the water source. See Forest Service,
    (Continued)
    35
    3.
    “Directly Related”
    Having set forth the amendments to the Jefferson Forest Plan, we must now look
    to whether the 2012 Planning Rule substantive requirements are “directly related” to the
    plan direction added or modified by those amendments. 
    36 C.F.R. § 219.13
    (b)(5).
    a.
    Proper Analysis
    In undertaking the “directly related” analysis, an agency’s “determination must
    be based on the purpose for the amendment and the effects (beneficial or adverse) of the
    amendment, and informed by the best available scientific information, scoping, effects
    analysis, monitoring data or other rationale.” 
    36 C.F.R. § 219.13
    (b)(5)(ii) (emphasis
    supplied). In the ROD, the Forest Service states that some 2012 Planning Rule soil and
    riparian substantive requirements are “relevant to th[e] [Jefferson Forest Plan]
    amendment”: for example, soil and soil productivity; water resources in the plan area;
    ecological integrity of riparian areas. J.A. 1287 (emphasis supplied). But it nonetheless
    concludes they were not “directly related” to the Planning Rule because, with proposed
    mitigation measures in the plan of development and project design, which “will minimize
    adverse environmental impacts to soils and water resources and riparian areas,” the
    amendment will not cause “substantial adverse effects” or “a substantial lessening of
    Definition of Riparian Corridor, https://www.fs.usda.gov/Internet/FSE_DOCUMENTS/
    stelprd3834599.pdf (enclosed as PDF attachment).
    36
    protections” to soil and water. 
    Id.
    With regard to the directly related analysis, the Department of Agriculture itself
    has explained, “When a specific substantive requirement is associated with either the
    purpose for the amendment or the effects (beneficial or adverse) of the amendment, the
    responsible official must apply that requirement to the amendment.” Nat’l Forest Sys.
    Land Mgmt. Planning, 
    81 Fed. Reg. 90723
    -01, 90731 (Dec. 15, 2016) (emphasis
    supplied).    We conclude that the only way to read this statement, along with
    § 219.13(b)(5)(ii), is to require the agency to look to both the purpose and effect of the
    amendment, and if the substantive requirement at issue (i.e., soil, water) is based upon or
    associated with either one, it is directly related.
    In its ROD here, however, the Forest Service failed to analyze the purpose of the
    amendment. Instead, it only analyzed the effects of the amendment. This is an improper
    interpretation of a decidedly unambiguous regulation -- one that, as noted directly above,
    the Department of Agriculture had already interpreted to the contrary -- and thus, the
    Forest Service analysis here is entitled to no deference. See Auer v. Robbins, 
    519 U.S. 452
    , 461 (1997) (review of agency’s interpretation of its own regulation “controlling
    unless plainly erroneous or inconsistent with the regulation” (internal quotation marks
    omitted)); see also Ohio Valley Envtl. Coal. v. Aracoma Coal Co., 
    556 F.3d 177
    , 193 (4th
    Cir. 2009) (“In applying . . . Auer deference . . . we must first determine whether the
    regulation itself is unambiguous; if so, its plain language controls.” (internal quotation
    marks omitted)).
    37
    b.
    Purpose of the Amendment
    Thus, we look to the purpose of the amendment, which is determined by “the need
    to change the plan.” 
    36 C.F.R. § 219.13
    (b)(1); see also 81 Fed. Reg. at 90,731. A
    “responsible official” is required to identify that need, 
    36 C.F.R. § 219.13
    (b), and the
    record is clear that the Forest Service has already done this.          The Forest Service
    admittedly needed to change the Forest Plan because the MVP project could not meet its
    requirements otherwise. See J.A. 1280 (“The amendment [to the Forest Plan] is needed
    because the MVP Project cannot achieve several Forest Plan standards that are intended
    to protect soil, water, [and] riparian . . . resources.” (emphasis supplied)). Of note,
    elsewhere in the ROD, the Forest Service characterizes the purpose of the amendment as
    “ensur[ing] consistency between provisions of the Forest Plan and the proposal to
    construct, operate, and maintain [the pipeline] on National Forest System land.” J.A.
    1284. But there would be no need to “ensure consistency” if the Forest Plan need not be
    amended in the first place. Thus, the clear purpose of the amendment is to lessen
    requirements protecting soil and riparian resources so that the pipeline project could meet
    those requirements.
    Having determined the purpose of the amendment, it is clear the Planning Rule
    sets forth substantive requirements directly related to that purpose: “soil and soil
    productivity”   (
    36 C.F.R. § 219.8
    (a)(2)(ii));   “water   resources”    (
    36 C.F.R. § 219.8
    (a)(2)(iv)); “the ecological integrity of riparian areas” (
    36 C.F.R. § 219.8
    (a)(3)(i)).
    Therefore, there is no question that the 2012 Planning Rule requirements for soil, water,
    38
    and riparian resources are directly related to the purpose of the Forest Plan amendment.
    The Forest Service acted arbitrarily and capriciously in concluding otherwise.
    c.
    Remand to the Forest Service
    Because the soil and riparian Planning Rule requirements are directly related to
    the amendments to the Jefferson Forest Plan, the agency is required to “apply [those]
    requirement[s] within the scope and scale of the amendment.” 
    36 C.F.R. § 219.13
    (b)(5).
    At base, this means that the Forest Service is required to ensure that amendments to the
    soil and riparian standards in the Jefferson Forest Plan will comply with the NFMA and
    attendant regulations. The Forest Service claims this would be an exercise in futility, as
    the record already demonstrates that the mitigation measures proposed by MVP and
    agreed upon by FERC and the other agencies will ensure that there will be no substantial
    adverse effects to soil and water.     However, as explained in our analysis of the
    Hydrologic Report, supra, the record does not support such a conclusion as a matter of
    law. We therefore remand to the Forest Service for proper application of the Planning
    Rule soil and riparian requirements to the Forest Plan amendment.
    C.
    The Mineral Leasing Act
    Finally, we turn to Petitioners’ argument that the BLM violated the MLA in its
    grant of the 3.6 mile right of way across federal land. The Natural Gas Act gives FERC
    the authority over construction and operation of interstate gas pipelines, but it does not
    limit or modify other agencies’ authority or obligations. The MLA regulates the location
    39
    of interstate pipelines across most federal lands. See 
    30 U.S.C. § 185
    (a). This includes
    approving rights of way and easements for the siting of those pipelines. The BLM
    implements the right of way program to “[p]rotect[] the natural resources associated with
    Federal lands”; “[p]revent[] unnecessary or undue degradation to public lands”; and
    “[p]romote[] the use of rights-of-way in common.” 
    43 C.F.R. § 2881.2
    (a)–(c).
    1.
    Practicality
    The MLA provides, “In order to minimize adverse environmental impacts and the
    proliferation of separate rights-of-way across Federal lands, the utilization of rights-of-
    way in common shall be required to the extent practical.” 
    30 U.S.C. § 185
    (p) (emphasis
    supplied). Petitioners contend the BLM violated its obligations because it “failed to
    demonstrate that alternatives that would make greater use of existing rights-of-way were
    impractical.” Pet’rs’ Br. 45 (emphasis supplied). We agree. Whereas the BLM’s ROD
    adopted and incorporated the EIS’s NEPA alternatives analysis on this issue, it
    nonetheless failed to recognize that the MLA imposes a higher and more specific bar.
    The EIS “evaluate[d] a range of reasonable alternatives, as required by NEPA,”
    explaining, “The purpose of this evaluation is to determine whether an alternative would
    be preferable to the proposed action.” J.A. 113–14 (emphasis supplied). The EIS used
    the following criteria in considering whether an alternative was “preferable”: (1) whether
    it met “the stated purpose of the project”; (2) whether it was “technically and
    economically feasible and practical”; and (3) whether it “offer[ed] a significant
    environmental advantage over [the] proposed action.” 
    Id. at 114
    . Importantly, the EIS
    40
    explained, “Ultimately, an alternative that results in equal or minor advantages in terms
    of environmental impact would not compel [FERC] to shift the impacts from the [set of
    landowners set to be affected by the proposed route] to a new set of landowners.” 
    Id.
    Using this criteria, the EIS discussed alternative routes.       For example, the
    Columbia Gas of Virginia (“CGV”) Peters Mountain Variation would “follow existing
    rights-of-way . . . cross[ing] approximately 0.8 mile[s] of the Jefferson National Forest.”
    J.A. 149. However, the EIS also explained that this route “would be about 9 miles longer
    than the comparable portion of the proposed route, and would result in approximately 136
    additional acres of construction disturbance.” 
    Id. at 151
    . Thus, the EIS concluded that
    the CGV alternative route “does not offer a significant environmental advantage when
    compared to the corresponding proposed route.” 
    Id. at 152
     (emphasis supplied). The
    BLM’s ROD, like the EIS, considered whether alternatives “offer[ed] a significant
    environmental advantage over the proposed pipeline route.” 
    Id. at 603
    ; see also 
    id. at 607
    .   Nowhere, however, does the BLM recognize the MLA’s direction that the
    utilization of rights of way in common “shall be required to the extent practical.” 
    30 U.S.C. § 185
    (p).
    However, the BLM contends that its analysis is sufficient, explaining, “The
    comparative analysis in the EIS showed that alternative National Forest crossings along
    existing rights-of-way posed greater practical difficulties without yielding a significant
    environmental advantage.” Resp’ts’ Br. 16. Thus, by incorporating and adopting the
    EIS, the BLM fulfilled its statutory duty to utilize existing rights of way when practical.
    The BLM also argues it has wide discretion to decide, on a case-by-case basis, which
    41
    alternatives are practical. As support for its interpretation, it points to a BLM regulation
    providing that the agency “may . . . restrict new grants to existing right of way corridors
    where safety and other considerations allow.”        
    43 C.F.R. § 2882.10
    (b) (emphases
    supplied).     And as set forth in the EIS, with regard to alternatives, other factors
    outweighed the environmental benefits of utilizing existing rights of way.
    We disagree with the BLM’s analysis. The agency “entirely failed to consider an
    important aspect of the problem.” Defs. of Wildlife, 762 F.3d at 396. It never decided
    that the utilization of an existing right of way would be impractical. Indeed, it never
    even purported to do so. Had the BLM done so, its analysis -- rather than favoring the
    proposed route by rejecting alternatives unless they were substantially better -- would
    have favored routes utilizing existing rights of way unless those alternatives were
    impractical.
    Although the BLM did not make a practicability finding, we are not authorized to
    step in and do so on behalf of the agency, nor may we predict how the agency might have
    made such a finding. See Michigan v. EPA, 
    135 S. Ct. 2699
    , 2710 (2015) (“[A] court
    may uphold agency action only on the grounds that the agency invoked when it took the
    action.” (citing SEC v. Chenery Corp., 
    318 U.S. 80
    , 87 (1943))). We thus vacate the
    BLM’s decision and remand for consideration of the MLA’s preference for utilizing
    existing rights of way.
    42
    2.
    Feasibility
    The MLA also requires the BLM to ensure that “activities in connection with the
    right-of-way or permit” comply with “facility siting standards established by or pursuant
    to law.” 
    30 U.S.C. § 185
    (h)(2)(B). Petitioners state that one such facility siting standard
    is set forth in the Jefferson Forest Plan and requires that “[w]hen feasible, expansion of
    existing corridors and sites is preferable to designating new sites.” Standard FW-247,
    J.A. 1238.
    Petitioners read this standard as creating an obligation upon the BLM to
    demonstrate that collocation with existing rights of way is infeasible. But the siting
    standard does not appear to apply to the ROD’s determination of the proper route for a
    right of way. Rather, it dictates that the right of way grant would “ensure that activities
    in connection with” the right of way abide by siting standards.                 See 
    43 C.F.R. § 2885.11
    (b)(9)(ii) (providing that applicants who receive a right of way grant from the
    BLM must, “[d]uring construction, operation, maintenance, and termination of the
    project,” “[e]nsure that activities in connection with the grant . . . comply with . . . facility
    siting standards”); see also J.A. 572 (BLM ROD stating that approval of the right of way
    is “subject to terms, conditions, stipulations, and environmental protection measures”
    developed by the Forest Service, which would include the Jefferson Forest Plan).
    Accordingly, the BLM is not required to show that siting alternatives are infeasible under
    the MLA.
    43
    IV.
    MVP’s proposed project would be the largest pipeline of its kind to cross the
    Jefferson National Forest. American citizens understandably place their trust in the
    Forest Service to protect and preserve this country’s forests, and they deserve more than
    silent acquiescence to a pipeline company’s justification for upending large swaths of
    national forestlands. Citizens also trust in the Bureau of Land Management to prevent
    undue degradation to public lands by following the dictates of the MLA.
    As a result, for the reasons set forth herein, we grant the petition for review of the
    Forest Service Rule of Decision and vacate that decision. We also grant the petition for
    review of the BLM’s Rule of Decision and vacate that decision. We remand to the
    respective agencies for proceedings consistent with this opinion.
    PETITIONS FOR REVIEW GRANTED,
    VACATED AND REMANDED
    44