Atchafalaya Basinkeeper v. U.S. Army Corps , 894 F.3d 692 ( 2018 )


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  •      Case: 18-30257   Document: 00514544106     Page: 1   Date Filed: 07/06/2018
    IN THE UNITED STATES COURT OF APPEALS
    FOR THE FIFTH CIRCUIT    United States Court of Appeals
    Fifth Circuit
    FILED
    July 6, 2018
    No. 18-30257
    Lyle W. Cayce
    Clerk
    ATCHAFALAYA BASINKEEPER; LOUISIANA CRAWFISH PRODUCERS
    ASSOCIATION-WEST; GULF RESTORATION NETWORK;
    WATERKEEPER ALLIANCE; SIERRA CLUB, and its Delta Chapter,
    Plaintiffs - Appellees
    v.
    UNITED STATES ARMY CORPS OF ENGINEERS,
    Defendant - Appellant
    BAYOU BRIDGE PIPELINE, L.L.C.; STUPP BROTHERS,
    INCORPORATED, doing business as Stupp Corporation,
    Intervenor Defendants - Appellants
    Appeals from the United States District Court
    for the Middle District of Louisiana
    Before REAVLEY, JONES, and GRAVES, Circuit Judges.
    EDITH H. JONES, Circuit Judge:
    The United States Army Corps of Engineers (the “Corps”) and Bayou
    Bridge Pipeline, LLC (“Bayou Bridge,” a convenience that includes co-
    appellant Stupp Brothers, Inc.), appeal the district court’s grant of a
    preliminary injunction preventing Bayou Bridge from constructing a pipeline
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    in part through the Atchafalaya Basin of southern Louisiana. The injunction
    was based on the Corps’ alleged failure to satisfy the demands of the National
    Environmental Policy Act in issuing a construction permit. Because the court
    misperceived the applicable regulations, and the Corps’ analysis, properly
    understood, vindicates its decision that an Environmental Assessment sufficed
    under these circumstances, we vacate the preliminary injunction and remand
    to the district court.
    BACKGROUND
    On December 14, 2017, after a year-long review, the Corps issued Bayou
    Bridge a permit under Section 404 of the Clean Water Act (“CWA”),
    33 U.S.C. § 1344, and Sections 10 and 14 of the Rivers and Harbors Act of 1899,
    33 U.S.C. §§ 403, 408, allowing it to build a 162-mile crude oil pipeline from
    Lake Charles, Louisiana to terminals near St. James. Portions of the pipeline
    will cross the Atchafalaya Basin, affecting wetlands. The discharge of dredge
    or fill material into these wetlands necessitated the Corps’ permitting action
    under the Clean Water Act, 33 U.S.C. § 1311(a), while the Rivers and Harbors
    Act requires permitting for structures in or affecting “navigable waters” as
    defined by regulations.
    In discharging its permit responsibilities, the Corps was required to
    implement the National Environmental Policy Act (“NEPA”), a procedural
    statute, which requires certain steps before federal agencies may approve
    projects that will affect the environment. To comply, the agency first prepares
    an environmental assessment (“EA”). Sabine River Auth. v. U.S. Dep’t of
    Interior, 
    951 F.2d 669
    , 677 (5th Cir. 1992). As this court has held, “[a]n EA
    should be a ‘concise public document . . . that serves to . . . [b]riefly provide
    sufficient evidence and analysis for determining whether to prepare an
    [environmental impact statement].’” O'Reilly v. U.S. Army Corps of Eng’rs,
    
    477 F.3d 225
    , 228 (5th Cir. 2007) (quoting 40 C.F.R. § 1508.9(a)). If the agency
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    finds during this process that the proposed action will result in “significant”
    effects to the environment, then it must also prepare an environmental impact
    statement (“EIS”). Id.; 42 U.S.C. § 4332(C). If the agency finds that the project
    will not have a significant impact, it will conclude with a “Finding of No
    Significant Impact” (“FONSI”) and no EIS will be required. Sabine River
    
    Auth., 951 F.2d at 677
    .
    In this instance, the Corps authored two EAs, one under the Rivers and
    Harbors Act (the “408 EA”), and the other under Section 404 of the CWA (the
    “404 EA”). Based on those assessments, which together run over two hundred
    pages, plus appendices of nearly 200 pages more, the Corps determined that
    an EIS would not be necessary for this project and issued a FONSI.
    Atchafalaya Basinkeeper and other organizations interested in the
    Atchafalaya basin brought suit in January 2018 against the Corps and sought
    a preliminary injunction to redress alleged violations of NEPA and the CWA.
    Bayou Bridge and Stupp Brothers intervened as defendants. The district court
    held an expedited hearing even before the complete administrative record
    could be filed. The court’s decision, filed soon afterward, rejected a number of
    Appellees’ contentions but found that Appellees had shown irreparable harm
    and had demonstrated a likelihood of success on the merits as well as other
    prerequisites of preliminary relief for two of their claims: (1) the EAs violated
    NEPA and the CWA by failing to adequately analyze mitigation for the loss of
    cypress-tupelo swamp along the pipeline right of way through the Basin, and
    (2) the EAs violated NEPA and the CWA by failing to adequately consider
    historical noncompliance by other pipelines and the cumulative effects of this
    project.   The resulting preliminary injunction stopped construction only
    “within the Atchafalaya Basin.”
    Appellants sought a stay of the injunction pending appeal, which this
    court granted in a split decision.
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    Appellants raise a number of issues for review: that the district court
    applied an incorrect standard for determining injunctive relief; abused its
    discretion in finding Appellees likely to succeed on the merits and affirming
    the other bases for injunctive relief; and issued an improper and overbroad
    injunction. We need only rule on the court’s errors in assessing the likelihood
    that Appellees will succeed on the merits. 1
    STANDARD OF REVIEW
    A grant of a preliminary injunction is reviewed for abuse of discretion.
    La Union Del Pueblo Entero v. FEMA, 
    608 F.3d 217
    , 220 (5th Cir. 2010).
    Factual determinations within the preliminary injunction analysis are
    reviewed for clear error, and legal conclusions within the analysis are reviewed
    de novo. 
    Id. A preliminary
    injunction is an extraordinary remedy. In addition
    to proving a likelihood of prevailing on the merits, the movant must
    demonstrate a substantial threat of irreparable injury if the injunction is not
    granted; the threatened injury outweighs any harm that will result to the non-
    movant if the injunction is granted; and the injunction will not disserve the
    public interest.” 
    Id. at 219.
    The district court abuses its discretion if it relies
    on clearly erroneous factual findings in deciding whether to grant a
    preliminary injunction or relies on “erroneous conclusions of law.” 
    O’Reilly, 477 F.3d at 238
    (internal citations and quotations omitted).
    1 In particular, the parties spar over whether the Supreme Court has determined that
    a “substantial likelihood of success on the merits” is invariably required for injunctive relief,
    thereby overruling some decisions that implied a “sliding scale” comparing the legal issues
    with the strength of the “irreparable harm” to the non-movant. Compare Winter v. Nat. Res.
    Def. Counsel, Inc., 
    555 U.S. 7
    , 
    129 S. Ct. 365
    , (2008) with Productos Carnic, S.A. v. Cent. Am.
    Beef & Seafood Trading Co., 
    621 F.2d 683
    , 686 (5th Cir. 1980)). Although the district court
    here first applied the sliding scale approach, it alternatively referenced the substantial
    likelihood of success requirement. Additionally, because the court’s legal errors here, though
    no doubt inadvertent, are decisive, we need not wade into that debate.
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    The Corps’ actions under the NEPA and CWA are subject to review
    under the Administrative Procedure Act (“APA”). As relevant here, a court will
    uphold an agency action unless it finds it to be “arbitrary, capricious, an abuse
    of discretion, or otherwise not in accordance with law.” 5 U.S.C. § 706(2)(A);
    Coastal Conservation Assoc. v. U.S. Dep’t of Commerce, 
    846 F.3d 99
    , 110-11
    (5th Cir. 2017). This is a demanding standard. The Supreme Court carefully
    explained factors that inform judicial review under this provision.           Motor
    Vehicle Mfrs. Ass’n v. State Farm Mut. Auto Ins. Co., 
    463 U.S. 29
    , 43,
    
    103 S. Ct. 2856
    , 2866-67 (1983), and its words are worth repeating here:
    The scope of review under the “arbitrary and capricious” standard
    is narrow and a court is not to substitute its judgment for that of
    the agency. Nevertheless, the agency must examine the relevant
    data and articulate a satisfactory explanation for its action
    including a “rational connection between the facts found and the
    choice made.” In reviewing that explanation, we must “consider
    whether the decision was based on a consideration of the relevant
    factors and whether there has been a clear error of judgment.”
    Normally, an agency rule would be arbitrary and capricious if the
    agency has relied on factors which Congress has not intended it to
    consider, entirely failed to consider an important aspect of the
    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.
    (citations omitted).
    DISCUSSION
    A. The district court decision.
    The district court analyzed at length each of the Appellees’ specific
    challenges to the procedural and substantive sufficiency of the EAs. The court
    rejected the complaint that the Corps’ analysis of the environmental impact on
    the Basin of possible oil spills was insufficient and therefore arbitrary and
    capricious. The court also rejected the assertion that the Corps provided
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    defective public notice of the “type and location of the proposed mitigation”
    measures; as the court noted, the public comments, many of which were made
    by the Appellees here, were addressed and responded to by the Corps in 26
    pages of the Section 404 EA.
    The court then focused on specific impacts of this project in the Basin,
    i.e., that 455.5 acres of “jurisdictional wetlands” will be temporarily affected
    and approximately 142 acres of those wetlands “[will] be permanently
    converted from forested to herbaceous wetlands within the permanent right-
    of-way.” The Section 404 EA states that “[t]he proposed project will change
    and/or reduce wetland functional quality along the proposed ROW by
    conversion of forested habitat types.” The EA identifies “[a] key issue(s) of
    concern in this watershed is the loss of wetland function and value.”
    The court found three failures in the Corps’ ultimate FONSI
    determination. First, the court acknowledged that “reliance on mitigation
    measures may reduce a project’s impacts below the level of significance,”
    quoting 
    O’Reilly, 477 F.3d at 231
    , and the agency’s reasoning “need not be laid
    out to the finest detail . . . .” However, “an EIS involving mitigation” may not
    be predicated on “mere perfunctory or conclusory language . . . ,” quoting
    
    O’Reilly, 477 F.3d at 231
    -32. The court believed the Corps was perfunctory.
    Second, the court accepted the Appellees’ reading of the relevant CWA
    regulation, 33 C.F.R. §332.3, and concluded it does not “impos[e] a mechanical
    and rigid hierarchy” according to which out-of-kind mitigation credits within
    the watershed must be substituted for alternative in-kind mitigation
    alternatives. The court accordingly criticized the Corps’ EAs for failing to
    discuss “how the mitigation choices serve[] the stated goal of ‘replac[ing] lost
    functions and services;’” and failing to analyze in the Section 404 EA whether
    a ‘preference’ for mitigation bank credits was appropriate or whether the
    particular mitigation bank credits to be acquired are “located where it is most
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    likely to successfully replace lost functions and services.” (quoting 33 C.F.R.
    § 332.3(b)(1)). The court found the 404 EA “devoid” of data analyzing the
    consequence of the “irretrievabl[e] los[s]” of 142 acres of cypress/tupelo swamp
    wetlands.   Consequently, “there is not one iota of discussion, analysis, or
    explanation” how out-of-kind credits mitigate the loss of function of the
    cypress/tupelo swamp. The court also found “precious little analysis” of what
    “best practices” the Corps required for Bayou Bridge’s construction will be and
    how they offset temporary impacts of construction within the Basin. For these
    basic reasons, the court determined that the FONSI for this project was
    arbitrary and capricious.
    Third, the court also discussed Appellees’ contention that because earlier
    pipeline projects through the Basin had created spoil banks and other
    detrimental conditions, the EAs did not properly address “cumulative impacts”
    of this project in terms of those defaults. The court agreed with Appellees’
    contention, referring to 
    O’Reilly, 477 F.3d at 234-35
    , and 40 C.F.R. §§ 1508.7
    and 1508.25. It concluded that Appellees had demonstrated a likelihood of
    success on the merits in showing the deficiency of the EAs.
    Bearing in mind that the Corps’ NEPA obligation was limited to
    discussing relevant factors and explaining its decision, not to reaching
    conclusions that this court or the district court approves, Robertson v. Methow
    Valley Citizens Council, 
    490 U.S. 332
    , 350, 
    109 S. Ct. 1835
    , 1846 (1989), we
    address each of these conclusions in turn.
    B. FONSI versus “mitigated FONSI.”
    In its critical reliance on O’Reilly, the court misunderstood the difference
    between a “mitigated FONSI” at issue in that case and the Corps’ FONSI here.
    The “mitigated FONSI” means that without mitigation, a project will have a
    “significant” environmental impact. Final Guidance for Federal Departments
    and Agencies on the Appropriate Use of Mitigation and Monitoring and
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    Clarifying the Appropriate Use of Mitigated Findings of No Significant Impact,
    76 Fed. Reg. 3843, 3846 (Jan. 21, 2011). Here, however, after considering all
    the circumstances, including—importantly—measures imposed on Bayou
    Bridge to comply with the CWA, this project did not have a “significant”
    environmental impact.
    In O’Reilly, by contrast, the impact of a housing development on adjacent
    wetlands was undisputable and irrevocable, yet the Corps utterly failed to
    discuss mitigation measures. 
    O’Reilly, 477 F.3d at 232-34
    . 2 On their face, the
    200+ pages in both EAs here acknowledged potential environmental impacts
    from the project, discussed third parties’ concerns about those impacts,
    referenced in detail the hydrological, horticultural and wildlife environment in
    the affected acreage of the Basin, and explained how and where mitigation
    bank credits and construction protocols would be adopted to render the
    watershed impact not “significant.” The court’s misplaced view that the Corps
    issued a “mitigated FONSI” is an error of law that steered it in the wrong
    direction. Perhaps the Corps’ discussion might have been improved with the
    addition of certain details, but the Corps’ path could “reasonably be discerned”
    from the EAs and other publicly available documents and should have been
    upheld. Nat’l Ass’n of Home Builders v. Defs. of Wildlife, 
    551 U.S. 644
    , 658,
    
    127 S. Ct. 2518
    , 2530 (2007) (internal quotation marks omitted).
    C. Application of out-of-kind mitigation credits.
    Separate from the “mitigated FONSI” issue is the question whether the
    Corps properly applied CWA regulations when it determined that Bayou
    Bridge could (1) utilize approved construction methods within the Basin, and
    2The Corps additionally points out that O’Reilly predates Council on Environmental
    Quality Regulations that constituted final guidance and clarifications about, inter alia, the
    appropriate use of mitigated FONSIs. 76 Fed. Reg. at 3843. Appellees have not directly
    challenged the Corps’ adherence to this guidance.
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    (2) purchase (a) in-kind mitigation credits, i.e. cypress-tupelo acreage within
    the watershed and, when those were exhausted, (b) out-of-kind credits of
    bottomland hardwood acreage within the watershed to compensate for the
    project’s impact.
    When it concluded that the Corps did not sufficiently explain the need
    for or alternatives to out-of-kind mitigation credits, or the measures required
    to replace “lost aquatic functions and services” from this project, the district
    court misread the applicable regulation and failed to acknowledge its
    application by means of the Louisiana Wetland Rapid Assessment Method
    (“LRAM”). 3      To explain these errors, we begin with the applicable CWA
    regulation, pursuant to which the Corps must require “compensatory
    mitigation” to “offset environmental losses resulting from unavoidable impacts
    to waters of the Unites States . . . .” 33 C.F.R. § 332.3(a)(1). Mitigation is
    required to compensate “for the aquatic resource functions that will be lost as
    a result of the permitted activity.” 
    Id. Criticizing the
    Corps’ approval of out-
    of-kind mitigation, the district court stated that Section 332.3 does not
    “impos[e] a mechanical and rigid hierarchy” establishing a preference for out-
    of-kind mitigation. This was incorrect.
    The first paragraph of the regulation states that, “in many cases, the
    environmentally preferable compensatory mitigation may be provided through
    mitigation banks or in-lieu fee programs because they usually involve
    consolidating       compensatory         mitigation       projects      where      ecologically
    appropriate, consolidating resources, providing financial planning and
    3  The court also clearly erred in stating that, “142 acres of wetlands . . . will be . . .
    irretrievably lost.” According to the 404 EA, 142 acres will be converted from forested
    wetlands to scrub shrub wetlands and 78 of these acres will have previously been
    cypress/tupelo swamp (designated PFO2 in the LRAM tables). “Herbaceous wetlands” also
    provide important aquatic functions. Because there will be no filling of wetlands in this
    project, converting them to dry land, the Corps found no permanent loss of wetlands.
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    scientific expertise (which often is not practical for permittee-responsible
    compensatory mitigation projects), reducing temporal losses of functions, and
    reducing uncertainty over project success.” § 332.3(a)(1) (emphasis added).
    The next section of the regulation, describing “Type and location of
    compensatory mitigation,” states that “[w]hen considering options for
    successfully providing the required compensatory mitigation, the district
    engineer shall consider the type and locations options in the order presented in
    paragraphs (b)(2) through (b)(6) of this section.        In general, the required
    compensatory mitigation should be located within the same watershed as the
    impact site . . . .” § 332.3(b)(1) (emphasis added). The first listed option is
    “Mitigation bank credits,” which then describes the reasons “the district
    engineer should give preference” to them;         the reasons include the better
    scientific management, large scale, and financial security provided within
    mitigation banks. § 332.3(b)(2). Further, mitigation bank credits are preferred
    “[w]hen permitted impacts are located within the service area of an approved
    mitigation bank, and the bank has the appropriate number and resource type
    of credits available.” 
    Id. The regulation
    next describes in detail the “Watershed approach to
    compensatory mitigation,” § 332.3(c), among whose “Considerations” is that it
    “may    include   on-site    compensatory     mitigation,     off-site   compensatory
    mitigation (including mitigation banks or in-lieu fee programs), or a
    combination . . . .” § 332.3(c)(2)(iii). In regard to “Site selection,” the regulation
    specifically authorizes district engineers to require “on-site, off-site, or a
    combination . . . [of] compensatory mitigation to replace permitted losses of
    aquatic resource functions and services.” § 332.3(d)(2).
    Once more, the regulation emphasizes that required “[m]itigation banks
    . . . may be used to compensate . . . in accordance with the preference hierarchy
    in paragraph (b) of this section.” § 332.3(g).
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    If this language does not set up a plain “hierarchy” strongly approving of
    mitigation banks—as opposed to the Appellants’ proffered clean-up by Bayou
    Bridge of spoil banks created by other pipeline builders long ago—it is hard to
    know what would do. See also Compensatory Mitigation for Losses of Aquatic
    Resources, 73 Fed. Reg. 19,594, 19,600, (April 10, 2008), referring to
    “hierarchy” in this regulation.
    As for the district court’s concern that the “hierarchy” would permit out-
    of-kind mitigation, i.e., allowing purchases of some bottomland hardwood
    credits within the Basin to mitigate the conversion of cypress/tupelo swamp to
    shrub scrub wetlands, the regulation says only this: “In general, in-kind
    mitigation is preferable to out-of-kind mitigation . . . . Thus, except as provided
    in paragraph (e)(2) of this section the required compensatory mitigation shall
    be of a similar type to the affected aquatic resource.” § 332.3(e)(1). The critical
    exception then authorizes out-of-kind compensatory mitigation “[i]f the district
    engineer determines, using the watershed approach . . . that [it] will serve the
    aquatic resource needs of the watershed.” § 332.3(e)(2). Further, “[t]he basis
    for authorization of out-of-kind compensatory mitigation must be documented
    in the administrative record for the permit action.” 
    Id. In sum,
    the Corps was authorized to employ out-of-kind credits within
    the same watershed if they serve the aquatic resource needs of the watershed
    and if the Corps’ reasoning is documented in the administrative record.
    § 332.3(e)(1), (2). That the out-of-kind credits here were within the watershed
    is not disputed.     What is questioned is whether the Corps sufficiently
    documented how those credits serve the Basin’s aquatic resource needs.
    No doubt in part because the Appellees did not highlight the Corps’ use
    of the LRAM methodology, the district court was not attuned to the agency’s
    reasoning about out-of-kind credits. However, because that methodology is of
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    public record, and because its use forms a major portion of the 404 EA, we can
    review the Corps’ decision within the proper administrative framework.
    The LRAM is the type of “functional assessment” tool that the CWA
    regulation advises “should be used” to “determine how much compensatory
    mitigation is required.” § 332.3(f)(1). Although LRAM is not a formal agency
    rule, it was published, subjected to comment by the public and numerous
    federal and Louisiana state agencies, and revised following their input. The
    LRAM states that its purpose is to “quantif[y] adverse impacts associated with
    permit applications and environmental benefits associated with compensatory
    mitigation” to determine the amount and type of credits necessary to offset a
    given impact. The LRAM consists of nearly 50 pages addressing all types of
    wetlands found in Louisiana, including bald cypress/tupelo swamp and
    bottomland hardwoods. It uses the prescribed “watershed approach,” and it
    assigns a numerical value to wetlands that will be affected by a Corps permit.
    The value scores the “lost aquatic functions and services” and the acreage
    affected by the permit, and it identifies mitigation banks in the same
    watershed where credits can be purchased to offset any loss. Using scientific
    data and numerous references, the LRAM scores wetlands impact based on
    factors including (1) the number of acres affected by the prospective permitted
    project; (2) how difficult particular wetlands are to replace; (3) habitat
    condition; (4) hydrologic condition; (5) negative human influences; and
    (6) permanent, partial or temporary loss. The LRAM assigns values to the
    quality of the wetlands and of the mitigation banks, converts the values into
    credits, and determines on a watershed basis how many acres in mitigation
    banks must be purchased by the prospective permittee.
    In general, the Supreme Court has held that the use of scientific
    methodology like that contained in the LRAM is subject to particular judicial
    deference.   Marsh v. Oregon Nat. Res. Council, 
    490 U.S. 360
    , 377-78,
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    109 S. Ct. 1851
    , 1861 (1989). More specifically, the Sixth Circuit has held that
    the use of “structural proxies that rationally predict aquatic functionality”
    “requires the exercise of complex scientific judgment and deference to the
    Corps’ expertise.” Kentuckians for the Commonwealth v. U.S. Army Corps of
    Eng’rs, 
    746 F.3d 698
    , 713 (6th Cir. 2014). Not to defer to the LRAM would be
    an error by this court.
    How the LRAM was utilized in the instant 404 EA is clearly referenced,
    if not fully explained in background, in twelve pages.       Each of the eight
    watersheds crossed by this project is individually described, followed by a
    summary description of the mitigation bank credits required for each, followed
    by a summary chart for each watershed.           Notably, although Appellees
    challenge only the requirement for out-of-kind mitigation bank purchases in
    the Atchafalaya Basin, they do not complain about similar out-of-kind credits
    that were also applied to the Terrebonne watershed.
    That the LRAM analysis “rational[ly] connect[ed]” the out-of-kind
    mitigation bank purchases in the Basin to the “aquatic functions and services”
    lost by the project is all that was required either by the CWA regulation, by
    NEPA, or by the Supreme Court.         Motor Vehicle 
    Mfrs., 463 U.S. at 43
    ,
    103 S. Ct. at 2866-67.
    First, Bayou Bridge was required to buy bottomland hardwood credits
    within the Basin watershed only because it had already purchased all available
    cypress/tupelo swamp credits. The Corps was entitled to make this decision
    rather than revert to the less-preferred alternatives prescribed in the
    regulations.
    Second, the Corps’ responsibility under the CWA is to ensure the
    protection of aquatic functions and services, which does not include the
    protection of tree species as such. The LRAM, properly read and understood,
    measures and scales precisely the aquatic functions and services characteristic
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    of each type of Louisiana wetland and corresponding mitigation banks
    containing those wetlands. The scales differed for bottomland hardwoods and
    cypress/tupelo swamp on the basis of factors noted above. Appellees have not
    challenged the scientific validity of the LRAM-based analysis and calculations.
    Third, as the 404 EA clearly states, “[t]he Louisiana Wetland Rapid
    Assessment Method was utilized to determine the acquisition of a total of 714.5
    acres of suitable habitat credits, from approved mitigation banks within the
    watershed of impact.”     It was on the basis of the LRAM that the Corps
    determined how many acres Bayou Bridge was required to purchase from
    mitigation banks within the Basin.          Whether bottomland hardwoods or
    cypress/tupelo, both mitigation banks constitute wetlands, and the Corps
    concluded that the required purchases made up for the temporary or
    permanent conversion from one type of wetland (bottomland hardwood or
    cypress/tupelo swamp) to scrub shrub wetland. And as has been mentioned,
    Appellees did not contest the out-of-kind mitigation used in part to compensate
    for wetland conversion in the Terrebonne watershed.
    Fourth, citing Section 332.3(b)(2)-(6), the 404 EA’s discussion of required
    compensatory mitigation bank purchases notes that the Corps’ conclusion
    accords with “the preferred hierarchy as set forth by the USACE,” i.e. in-basin,
    in-kind mitigation first; in-basin, out-of-kind second; etc.
    Fifth, contrary to the district court’s skepticism about the Corps’
    requirement of Best Management Practices during construction, the 404 EA
    concludes its analysis with the following description of “Other Mitigative
    Actions”:
    (See Department of the Army permit Special Conditions.) The
    applicant has avoided and minimized impacts to wetlands through
    co-locating the proposed project with other utility ROW’s, the use
    of horizontal directional drills, restrictions in construction ROW
    width in wetlands [from 100’ to 75’], and restrictions in the width
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    of permanently maintained ROW in wetlands [from 30’ to 15’].
    These avoidance and minimization measures will result in avoided
    wetland impacts.
    In addition to the foregoing measures, the 404 permit requires Bayou Bridge
    to “re-establis[h] pre-existing wetland contours and conditions immediately
    following project completion.”    The 404 EA also states that Bayou Bridge
    agreed to place its pipeline at a sufficient depth not to impede future spoil bank
    removal projects (from previous construction). Another permit condition warns
    that modification or adjustments to the pipeline as built may be required “to
    facilitate any future . . . hydrologic restoration projects.” The project’s permit
    may be modified or even revoked if Bayou Bridge fails to produce photographic
    evidence of compliance with the permit conditions.
    Sixth, to the extent O’Reilly might be considered to require the Corps to
    discuss mitigation alternatives under NEPA (irrespective of the distinction
    between a FONSI and a “mitigated FONSI”), that case becomes readily
    distinguishable when viewed in light of these EAs. O’Reilly predated and thus
    did not involve the mitigation hierarchy and considerations set forth in
    33 U.S.C. § 332.3.    As Bayou Bridge points out, O’Reilly did not involve
    mitigation banks approved under Section 332.8, nor an LRAM-type functional
    assessment tool.     This court’s decision rested on the fact that the Corps
    supplied “only cursory detail as to what” mitigation measures were required or
    how they operated. 
    O’Reilly, 477 F.3d at 234
    . In evaluating this project, the
    Corps conducted careful research; hewed to the governing regulations and the
    scientifically based LRAM tool; conditioned the permit in accordance with
    evolved best management practices; required purchases of acreage within
    mitigation banks that will provide the optimal replacement of lost aquatic
    functions and services; and produced two significantly reasoned EAs.
    15
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    No. 18-30257
    Finally, this explanation of the Corps’ decision process is readily
    understood on the basis of the EAs, supplemented by the publicly available
    LRAM. That the district court’s opinion did not express this understanding no
    doubt is partly attributable to its expedited judicial process, which pressed the
    parties’ presentations and lacked the full administrative record.            But
    regardless of these difficulties, the record suffices to supply a “rational
    connection” between the facts about the project and its CWA implications and
    the ultimate decision rendered. The Corps’ decision was thus not “arbitrary
    and capricious.”
    D. Analysis of “cumulative impacts”
    The district court asserted that the Corps “myopically” considered this
    project’s impacts alone, and it found the EAs deficient for failing to evaluate
    the pipeline project’s impact cumulatively with the effect of spoil banks left
    from past projects and an alleged history of noncompliance with prior Corps-
    approved permits. These criticisms misread the applicable statute and the
    EAs.    Under NEPA, agencies must consider each “cumulative impact” of
    permitted actions, and that term is defined as “the impact on the environment
    which results from the incremental impact of the action when added to other
    past, present, and reasonably foreseeable future actions.” 40 C.F.R. § 1508.7
    (emphasis added).    Here, the EAs concluded that because of appropriate
    mitigation measures, in terms of construction conditions and limitations in the
    permit, and Bayou Bridge’s purchase of compensatory mitigation bank
    acreage, there would be no incremental impact; hence, there could be no
    cumulative effects with regard to pre-existing spoil banks.
    The 408 EA specifically acknowledged past, present and reasonably
    foreseeable future actions, including previous pipelines, and maintained its
    conclusion that there would be no adverse results from temporary discharges
    during this construction. The 404 EA states that the district commander
    16
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    No. 18-30257
    reviewed the 408 EA before coming to a finding of no significant impact. The
    404 EA does discuss cumulative effects on the environment. It concluded that
    “through the efforts taken to avoid and minimize effects . . . and the mandatory
    implementation of a mitigation plan . . . permit issuance will not result in
    substantial direct, secondary or cumulative adverse impact on the aquatic
    environment.”
    Although the district court focused on the potential of the project for
    wetland alteration or loss, the EA states: “Resulting natural resource
    challenges and stresses include permanent loss of wetlands (of which this
    project constitutes temporary or conversion impacts, not permanent wetland
    loss), loss of wildlife habitat, and impacts to water quality. A key issue(s) of
    concern in this watershed is loss of wetland function and value.” (emphasis
    added). Not only does this clearly signify no permanent wetland loss, but also,
    after explaining mitigation for temporary impacts, monitoring and mitigation
    bank purchases in accord with LRAM, the EA states:                 “Appropriate
    compensatory mitigation was purchased at these banks to offset unavoidable
    impacts to wetlands that would result from permit issuance.”          (emphasis
    added). Finally, to recapitulate the permit conditions mentioned previously,
    Bayou Bridge’s construction, according to the permit, will leave the smallest
    possible footprint and will in several ways be accomplished without hindering
    possible future efforts to remove old spoil banks left by prior construction. In
    addition, the Corps is authorized under the permit to require replanting of
    desirable native tree species and undertake additional compensatory
    mitigation, further remediation actions, and/or further monitoring if the initial
    mitigation proves inadequate.
    The Corps’ analysis is not “myopic” with respect to “cumulative impacts”
    from other projects in the past. Our sister circuit has held that a finding of no
    incremental impact relieves an agency of the necessity of extensive and
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    ultimately uninformative discussion of cumulative effects pursuant to this
    regulation. See Nw. Envtl. Advocates v. Nat’l Marine Fisheries Serv., 
    460 F.3d 1125
    , 1140-41 (9th Cir. 2006); Northern Plains Res. Council, Inc. v. Surface
    Transp. Bd., 
    668 F.3d 1067
    , 1082 (9th Cir. 2011); cf. Louisiana Crawfish
    Producers Ass’n-West v. Rowan, 
    463 F.3d 352
    , 359 (5th Cir. 2006) (“The fact
    that the area is suffering environmental losses is part of the past cumulative
    impacts study but is not relevant to a finding of future impacts flowing from
    the project”) (emphasis added). The Corps acknowledged extrinsic past impacts
    on the Basin and explained how this permit will not only remediate the impacts
    of this project but will not interfere with further efforts to restore the
    watershed.
    The court’s concern about cumulative effects based on the alleged past
    noncompliance with Corps permit conditions is also misplaced. Not only did
    some of those projects predate the Clean Water Act, but Appellants’ factual
    information undermines specific charges made by Appellees about certain
    permit holders.     And in any event, the court’s fear of insufficient Corps
    monitoring activity contravenes “the presumption that public officers
    discharge[] their duties according to law.” Chaney v. United States, 
    406 F.2d 809
    , 813 (5th Cir. 1969). The treatment of “cumulative impacts” by the EAs
    was not deficient, much less arbitrary and capricious.
    CONCLUSION
    For the foregoing reasons, the EAs concerning this permit do not exhibit
    the Supreme Court’s criteria for an “arbitrary and capricious” decision. The
    agency decision did not “rel[y] on factors which Congress has not intended it to
    consider, entirely fail[] to consider an important aspect of the problem, offer[]
    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.” Motor Vehicle Mfrs. 
    Ass’n, 463 U.S. at 43
    ,
    18
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    No. 
    18-30257 103 S. Ct. at 2867
    . Further, because the court misapplied applicable legal
    principles and inadvertently but critically overlooked the LRAM, its decision
    was an abuse of discretion. The preliminary injunction is VACATED and
    REMANDED for further proceedings.
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    REAVLEY, Circuit Judge, dissenting:
    We have the law. To compensate for the destruction of environmentally
    protected wetlands, a permit must identify acreage apart that will protect the
    environment and compensate for what is destroyed. The administrative record
    must demonstrate how that decision was made, such that we uphold the
    decision not for its correctness but for its rational support.
    The district judge carefully studied the justification here and saw that
    gaps exist without more than conclusions. Now, the circuit court skips over
    those gaps. I dissent and explain myself in two respects.
    A.     Out-of-Kind Mitigation and the Clean Water Act
    The pipeline project will clear 262 acres of wetlands in the Atchafalaya
    Basin. That process will impact two resource types: cypress-tupelo swamp and
    bottomland-hardwood forest. In turn, the Corps applied its functional
    assessment tool (the Louisiana Rapid Assessment Method, or LRAM) and
    determined that the project’s impact called for the purchase of 232.8 acres of
    cypress-tupelo swamp and 80 acres of bottomland-hardwood forest from
    mitigation banks. But in what the Corps labels an “unfortunate[]” turn of
    events, one of the chosen mitigation banks did not have the number of
    cypress-tupelo acres necessary to match a fully in-kind mitigation. So the
    Corps sanctioned instead the purchase of 69 cypress-tupelo acres and 243.8
    bottomland-hardwood acres. In other words, the Corps offset cypress-tupelo
    harm    with   69     in-kind   cypress-tupelo   acres   and     163.8   out-of-kind
    bottomland-hardwood acres. The Corps thereby swapped each acre of
    unaccounted-for cypress tupelo with an acre of surplus bottomland hardwood—
    it treated the two resource types interchangeably.
    Under the Clean Water Act and its corresponding regulations, before the
    Corps could order the above out-of-kind swap, it bore a duty to (1) determine
    20
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    that such mitigation “will serve the aquatic resource needs of the watershed”
    and (2) so document that “basis for authorization . . . in the administrative
    record.” 33 C.F.R. § 332.3(e)(2).
    The court believes a satisfactory explanation lies in the Corps’ LRAM
    tool. I disagree. The LRAM lacks a critical explanatory component and thereby
    leaves the Corps’ out-of-kind mitigation unsubstantiated.
    The court explains the LRAM’s function as follows: “[T]he LRAM scores
    wetlands impact based on [various] factors . . . [and] assigns values to the
    quality of the wetlands and of the mitigation banks, converts the values into
    credits, and determines on a watershed basis how many acres in mitigation
    banks must be purchased by the prospective permittee.” In elementary terms,
    the LRAM compares land to land (impact site to mitigation bank) and
    calculates a ratio that, when applied to impacted acres, produces a suggested
    quantity of mitigation acres.
    However, the Corps still must accommodate another variable: resource
    type. The regulations prefer in-kind over out-of-kind mitigation precisely
    because different resource types supply different functions, or said another
    way, similar resource types are “most likely to compensate for the functions
    and services lost at the impact site.” 33 C.F.R. § 332.3(e)(1). To that end, the
    LRAM identifies a laundry list of habitats and groups them into six resource
    categories:   bottomland-hardwood        forest,   cypress-tupelo   swamp,     pine
    flatwoods-savanna,     coastal      prairie,   fresh-intermediate    marsh,     and
    brackish-saline marsh. Each category encompasses habitats that either
    provide “similar wetland functions or naturally exist together as a community.”
    The LRAM then         highlights the       presumption that      “in-kind habitat
    replacement” will “assure similar functions and services that are lost at an
    impact site are gained at a mitigation site.” Thus, when the Corps applies
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    in-kind mitigation to the LRAM’s calculated acreage, there is no need to
    manipulate the end product because the Corps’ path is self-explanatory—the
    ecological functions intrinsic to both parcels and resource types are fully
    documented on both sides of the mitigation equation.
    But when the Corps substitutes on the back end a resource that is out of
    kind—defined by the LRAM as “a resource of a different structural and
    functional type from the impacted resource”—the LRAM can no longer rely on
    a presumption of like functions for like resources. How, then, does the LRAM
    go about accounting for the variation between the resource impacted on the
    front end and the one purchased on the back end? The LRAM’s ratio itself does
    not factor in the resource type purchased on the back end. So, lest we assume
    that the LRAM’s calculated acreage is entirely fungible across all resource
    types—something no party or the court goes so far as to suggest—there must
    be something else in the LRAM to translate impacts from one resource to
    another (in this case, to justify the one-to-one substitution of bottomland
    hardwood for cypress tupelo).
    In that crucial respect, the LRAM is conspicuously silent. It mentions
    “out of kind” a single time: to define the term. Nowhere does the LRAM explain
    how to quantify impacts to one resource in terms of another, much less how
    cypress tupelo and bottomland hardwood—habitats of a “different structural
    and functional type”—can swap seamlessly for each other in terms of the
    basin’s resource needs. As useful as it otherwise may be, the LRAM is simply
    not a tool for out-of-kind mitigation.
    Nor does the Corps’ Section 404 Environmental Assessment bridge the
    explanatory gap. There the Corps grounded its out-of-kind swap on the bare
    fact that “there [were] not enough [in-kind] credits available for purchase in
    the basin.” But lack of in-kind credits, standing alone, says nothing of the
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    “resource needs” of the basin—the principal consideration that must
    accompany any order of out-of-kind mitigation. 33 C.F.R. § 332.3(e)(2).
    The Corps did not meet its regulatory burden to explain out-of-kind
    mitigation in this case. From the administrative record, then, the Corps’ “path
    may [not] reasonably be discerned.” Nat’l Ass’n of Home Builders v. Defs. of
    Wildlife, 
    551 U.S. 644
    , 658 (2007) (internal quotation marks omitted). The
    district court was therefore correct to enjoin construction.
    B.     Mitigated Versus Ambiguous Findings of No Significant Impact
    Whatever the ultimate merits of the plaintiffs’ claim under the National
    Environmental Policy Act, we ought to at least apply the right standard. I
    disagree with the court’s decision to adopt various tiers of scrutiny between
    those so-called “mitigated Findings of No Significant Impact” (FONSIs) and
    those other FONSIs in which mitigation plays a prominent but facially
    ambiguous role.
    In O’Reilly v. United States Army Corps of Engineers, 
    477 F.3d 225
    (5th
    Cir. 2007), we held insufficient an Environmental Assessment “that fail[ed] to
    articulate how the mitigation measures will render the adverse effects
    insignificant.” 
    Id. at 227.
    The Corps argues, however, that O’Reilly’s scrutiny
    applies only to mitigated FONSIs, those in which an agency engages in a
    two-part finding: (1) project impacts alone would be significant but (2) with
    mitigation, the impacts are reduced to insignificance. This case, the Corps says,
    does not involve a mitigated FONSI because the agency considered the project
    impacts and mitigation all at once before issuing a single finding of no
    significant impact. The Corps draws its labels for this distinction from a 2011
    guidance document. See 76 Fed. Reg. 3843, 3847–48. And the court appears to
    accept the Corps’ distinction wholesale.
    23
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    But that distinction is all form with no substance. O’Reilly stands for a
    fundamental proposition: When mitigation is a necessary part of a FONSI, the
    agency bears a duty to explain why the mitigation will be 
    effective. 477 F.3d at 231
    –32. Thus framed, there are but two types of FONSIs under O’Reilly:
    (1) those in which mitigation is an integral part of the insignificant outcome
    and (2) those in which the mitigation is ultimately gratuitous—that is, when
    the impacts would be insignificant even without mitigation. There is no third
    option.
    Of course, the manner in which an agency arrives at its FONSI can make
    the role of mitigation apparent on the face of the administrative record. When
    the agency issues a formal mitigated FONSI, we know for sure that mitigation
    was an integral piece. But, as here, when the Environmental Assessment
    lumps project impacts and mitigation into a single consideration with no
    further explication, the record obscures whether the impacts would have been
    significant absent the mitigation. All the same, these facially ambiguous
    assessments can involve necessary mitigation. And that is more than common
    sense talking; the Corps’ own guidance document tells us that ambiguous
    assessments might well involve mitigation that “reduce[s] the projected
    impacts of agency actions to below a threshold of significance.” 76 Fed. Reg.
    3843, 3847. In such a case, there is zero substantive difference between a
    mitigated FONSI and a facially ambiguous one and, as a consequence, zero
    reason to treat the two any different.
    So, the question becomes, was mitigation necessary to this project’s
    insignificant impact? On the one hand, the Corps is unwilling to concede that
    mitigation was necessary to reduce the project’s impact to insignificance. This
    despite the pages and pages of the Environmental Assessment detailing the
    hundreds of acres of shredded wetlands and corresponding compensatory
    24
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    mitigation. See 33 C.F.R. § 320.4(r)(1) (explaining that compensatory
    mitigation is meant to rectify “significant resource losses”) (emphasis added).
    Nonetheless, that must necessarily mean the project’s impacts would be
    insignificant even without mitigation. But as it so happens, the Corps is
    unwilling to say that either. And therein lies the paradox—the ambiguous
    record here enables the Corps to tiptoe on a nonexistent fence between the only
    two realities: mitigation that matters and mitigation that does not.
    When an agency cloaks the importance of mitigation behind an
    ambiguous administrative record, I would hold the agency to the standard
    articulated in O’Reilly.
    I respectfully dissent.
    25