Otay Mesa Property, L.P. v. United States Department of the Interior ( 2018 )


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  •                            UNITED STATES DISTRICT COURT
    FOR THE DISTRICT OF COLUMBIA
    )
    OTAY MESA PROPERTY, L.P., et al., )
    )
    PLAINTIFFS,             )
    )
    v.                      )                    No. 13-cv-0240 (KBJ)
    )
    UNITED STATES DEPARTMENT OF )
    THE INTERIOR, et al.,             )
    )
    DEFENDANTS.             )
    )
    MEMORANDUM OPINION
    Plaintiffs Otay Mesa Property, L.P., Rancho Vista Del Mar, and Otay
    International, LLC (collectively “Otay Mesa” or “Plaintiffs”) own land in San Diego
    County, California, that the U.S. Fish and Wildlife Service (“the FWS”) has designated
    as a “critical habit” for the endangered Riverside fairy shrimp under the Endangered
    Species Act (“the ESA”), 16 U.S.C §§ 1531–1544. Otay Mesa has filed the instant
    action against the FWS and its acting Director, the U.S. Department of the Interior
    (“Interior”), and two high-ranking Interior officers in their official capacities
    (collectively, “Defendants”) to challenge the propriety of the FWS’s critical habitat
    designation under the Administrative Procedure Act (“APA”), 5 U.S.C. §§ 701–706. 1
    This Court has already issued one memorandum opinion in this matter, see Otay Mesa
    Prop., L.P. v. U.S. Dep’t of the Interior, 
    144 F. Supp. 3d 35
    (D.D.C. 2015), wherein all
    disputed issues between Otay Mesa and FWS concerning the critical habitat designation
    1
    The FWS is an agency with the Interior Department. (Compl. ECF No. 1, ¶ 5.) Along with the FWS
    and Interior, Otay Mesa has sued Interior Secretary Ryan Zinke and the current Assistant Secretary of
    the Interior for Fish, Wildlife, and Parks. (Id.)
    for the endangered Riverside fairy shrimp were resolved save one: namely, whether it
    was proper for the FWS to assign a ‘critical habitat’ designation to 56 acres of Otay
    Mesa’s property that is immediately adjacent to the stock pond that contains the shrimp
    solely on the basis of the agency’s finding that the types of geological features that are
    generally necessary to support the shrimp species exist on those acres. The FWS had
    concluded that the 56 acres constituted either “occupied” critical habitat under the first
    prong of section 1532(5)(A) of Title 16 of the United States Code, or, alternatively,
    “unoccupied” critical habitat essential for the conservation of the species under the
    second prong of that same provision, but the agency had not conducted any
    hydrological studies or other surveys to determine the extent to which the 56 acres of
    land actually supported the ecological system that is necessary for the shrimp’s
    survival. As explained below, the question of whether or not the FWS employed an
    appropriate methodology to reach the critical habitat determination at issue in this case
    depends upon the meaning of the term “occupied” as it appears in the ESA, and also
    turns on the distinction that that statute makes between the standards for designating
    occupied and unoccupied critical habitats.
    Before this Court at present are the parties’ renewed cross-motions for summary
    judgment and the supplemental briefs that they have filed regarding these key legal
    issues. Otay Mesa maintains that it is entitled to judgment as a matter of law, because
    the FWS improperly designated the 56 acres of land as “occupied” habitat even though
    the shrimp live only in the one-acre stock pond and not on the land. (See Pls.’ 2d
    2
    Suppl. Br., ECF No. 42, at 8–9.) 2 Otay Mesa further contends that the FWS’s occupied
    critical habitat designation is improper under the ESA because there is no record
    evidence demonstrating that all 56 acres of adjacent land must be preserved in order to
    supply water to the one-acre stock pond where the shrimp live, and that the FWS
    improperly designated the 56 acres as “unoccupied” critical habitat in the alternative
    because it failed to apply the statutory standard for unoccupied critical habitat
    designations. (See 
    id. at 11–13;
    Pls.’ Resp. to Defs.’ Suppl. Br. & Pls.’ Renewed Mot.
    for Summ. J., ECF No. 36, at 3–4.) Defendants respond that the Court should order
    summary judgment in their favor, because the FWS reasonably determined that the
    stock pond and all 56 adjacent acres satisfy the ESA’s definition of occupied critical
    habitat on the basis of the best available scientific data (Defs.’ 2d Suppl. Br., ECF No.
    41, at 7–12, 16–22), and the FWS applied the correct legal standards when alternatively
    designating this area as unoccupied critical habitat under the ESA (id. at 12–16).
    For the reasons explained fully below, this Court finds that the law and record
    evidence do not support the FWS’s “occupied” or “unoccupied” critical habitat
    designations, and thus the critical habitat determination that Otay Mesa challenges here
    must be set aside as arbitrary and capricious and contrary to law in violation of the
    APA. To be specific, the manner in which the FWS determined the scope of the area
    that the Riverside fairy shrimp occupies is inconsistent with the ESA’s prescriptions for
    making that determination, and when the agency determined the area of unoccupied
    critical habitat, it failed to employ the statutory standard that is applicable to
    2
    Page numbers herein refer to those that the Court’s electronic case filing system automatically
    assigns.
    3
    unoccupied critical habitat designations. Consequently, Otay Mesa’s renewed motion
    for summary judgment must be GRANTED, Defendants’ motion for summary judgment
    must be DENIED, and the designation of Otay Mesa’s property as critical habitat must
    be VACATED. A separate Order that remands this matter to the agency for further
    proceedings will follow.
    I.      BACKGROUND
    A.      Prior Proceedings
    The procedural history of this dispute is described in detail in the opinion that
    the Court previously issued in this case, see Otay Mesa Prop., 
    144 F. Supp. 3d 35
    ;
    therefore, only a brief recounting of certain relevant background details is necessary
    here. The long and short of it is that Riverside fairy shrimp are “small freshwater
    crustacean[s]” that “rely upon ‘vernal pool’ hydrology” to grow and reproduce, 
    id. at 44,
    and since 2001, the FWS has been engaged in rule-making aimed at designating the
    critical habitat for this endangered species pursuant to the prescriptions of the ESA, see
    
    id. at 47.
    3 Two prior rules that the FWS promulgated with respect to these shrimp—one
    in 2001 and one in 2005—were each challenged in federal court, which resulted in
    settlement agreements and the subsequent promulgation of revised rules. 
    Id. At issue
    in this case is the most recent critical habitat designation for this species, which the
    FWS promulgated by a third rule-making process that took place in 2012 (“2012 Rule”),
    following the settlement of litigation arising from the 2005 rule.
    3
    Vernal pools are “pools that fill with water during fall and winter rains and evaporate in the spring.”
    Otay Mesa 
    Prop., 144 F. Supp. 3d at 44
    .
    4
    Plaintiffs are businesses that own the land in San Diego County, California,
    including property on which is located a one-acre vernal pool that was formerly a cattle
    stock pond and is now home to endangered Riverside fairy shrimp. Based upon
    environmental surveys that showed that the filled stock pond contained adult Riverside
    fairy shrimp during the wet season and the dried-out bed of that stock pond had
    Riverside fairy shrimp cysts in it during the dry season, the FWS determined that this
    endangered species “occupied” the one-acre stock pond at the time the species was
    listed in 1993—a finding that this Court has already upheld. 
    Id. at 59.
    In the 2012
    Rule, the FWS proceeded to designate as “occupied” critical habitat for the Riverside
    fairy shrimp not only the stock pond itself, but also approximately 56 acres of
    surrounding land (which is referred to throughout this Opinion as “Subunit 5c” or “the
    Property”), and alternatively, the FWS labelled those same areas as “unoccupied”
    critical habit, for the purpose of the ESA. 
    Id. at 52–53.
    4 Otay Mesa has plans to build
    a recycling center and landfill on the Property, and in the instant context, it represents
    that the FWS’s critical habitat designation “may make the completion of this project
    infeasible.” (Pls.’ Mem. in Supp. of Summ. J., ECF No. 9-1, at 34.) Consequently,
    Otay Mesa has filed a complaint that contends that the FWS’s designation of the one-
    acre vernal pool and the surrounding 56 acres of land as protected critical habitat under
    the ESA was an arbitrary and capricious determination, and was also contrary to law, in
    violation of the APA. See Otay Mesa 
    Prop., 144 F. Supp. 3d at 39
    .
    4
    There is no dispute that the only location on the Property where shrimp are actually located is the
    one-acre pool.
    5
    On September 30, 2015, this Court denied without prejudice the parties’ initial
    cross-motions for summary judgment. 
    Id. In so
    ruling, the Court found that Otay Mesa
    had standing to bring its lawsuit, and that the FWS did not act arbitrarily or
    capriciously with respect to either the economic analysis underlying the critical habitat
    designation or its decision not to conduct an analysis of the challenged critical habitat
    designation under the National Environmental Policy Act, 42 U.S.C §§ 4321–4370. See
    
    id. at 39.
    This Court further found that it had insufficient information to resolve the
    parties’ dispute about the rationality of the scope of the FWS’s critical habitat
    designation, because the Court could not “determine on the record before it whether the
    FWS has acted arbitrarily in concluding that 56 acres of land surrounding the one-acre
    pond is, in fact, watershed” for the pond. Id.; see also 
    id. at 39−40
    (explaining that “the
    portion of the administrative record that was submitted to the Court does not explain
    how the FWS determined that all of the geographic area that it designated as critical
    habitat qualifies as such” (emphasis added)). Consequently, the Court ordered the
    parties to file supplemental briefs that addressed the factual underpinnings for the
    FWS’s designation of 56 acres of land as watershed for the one-acre pond, along with
    any additional supporting documents from the Administrative Record. (See Suppl. Br.
    Order, ECF No. 31, at 1−2.)
    B.     Current Proceedings
    Defendants and Otay Mesa filed the requested supplemental briefs and renewed
    their cross-motions for summary judgment. (See Defs.’ Suppl. Br., ECF No. 33; Pls.’
    Resp. to Defs.’ Suppl. Br. & Pls.’ Renewed Mot. for Summ. J., ECF No. 37.) The Court
    heard oral argument on the parties’ renewed motions (Min. Entry of Mar. 15, 2017), and
    6
    during the hearing, Defendants’ counsel explained that the FWS’s methodology for
    determining the scope of the watershed—and thus the area that the FWS had deemed
    “occupied” or, alternatively, “unoccupied” critical habitat for the Riverside fairy
    shrimp—consisted of mapping the geographic location of the “primary constituent
    elements” (“PCEs”) that the FWS had identified for the endangered species at issue
    (which, as noted, is itself located solely in the one-acre stock pond), and then drawing
    the boundary of the critical habitat around those areas abutting the stock pond where all
    three PCEs exist, without additional analysis. (See Mot. Hr’g Tr., 47:4–48:24, Mar. 15,
    2017.) 5
    As a result, it became apparent that the parties’ dispute about whether the FWS’s
    designation of the 56 adjacent acres as critical habitat violates the APA is, at bottom, a
    disagreement over whether the FWS’s method of defining the scope of the territory that
    is “occupied” by the endangered species at issue is consistent with the ESA, which in
    turn implicates the issue of whether the area around the stock pond qualifies as
    “occupied” critical habitat under the statute—an issue that this Court did not reach in
    the context of its earlier summary judgment ruling. See Otay Mesa Prop., 
    144 F. Supp. 3d
    at 59–61 (explaining that “the FWS [had] decided that the Riverside Fairy shrimp
    ‘occupied’ the stock pond and [also] the watershed area surrounding the stock pond at
    5
    It is undisputed that the PCEs for the Riverside Fairy shrimp are:
    [F]irst, a vernal pool wetland, with pools that have suitable chemistry, that are
    filled 2 to 8 months during the winter and spring (though not necessarily every
    year), and that dry out in late spring or summer; second, adjacent areas that
    function as the local watershed, which may range in size from a few acres to more
    than 100 acres and which facilitate the filling of the pools in the winter and spring;
    and third, underlying soils that have an impermeable layer such that the pool can
    fill during the winter and spring months.
    Otay Mesa Prop., 
    144 F. Supp. 3d
    at 48 (citations omitted).
    7
    the time of listing,” and had determined, in the alternative, that “Subunit 5c qualified as
    ‘unoccupied’ critical habit[,]” but finding that, regardless, the agency had the statutory
    authority to make that determination). In other words, the Court discovered that, far
    from being immaterial, the question of whether the geographic area surrounding the
    stock pond constitutes “occupied” or “unoccupied” terrain under the ESA was crucial to
    resolving the merits of Otay Mesa’s remaining APA claim. As a result, the Court
    ordered the parties to file a second round of supplemental briefs, this time addressing
    (1) whether the “occupied” or “unoccupied” prong of the statutory critical habitat
    definition applies to the habitat at issue here; (2) whether the ESA authorizes the FWS
    to delineate the protected critical habitat under either prong by merely mapping the
    identified PCEs in the general area; and (3) whether this Court should give any weight
    to the Ninth Circuit’s decision in a case that agency counsel raised and relied upon
    during the hearing—Alaska Oil and Gas Association v. Jewell, 
    815 F.3d 544
    (9th Cir.
    2016)—which held that the FWS could designate an area that contains the PCEs for a
    species as critical habitat without establishing that the species currently uses that area,
    see 
    id. at 555–56.
    (See 2nd Order for Suppl. Briefing, ECF No. 38.)
    The parties filed their second supplemental briefs on May 10, 2017, and May 31,
    2017, respectively, and responses followed. (See Defs.’ 2d Suppl. Br., ECF No. 41;
    Pls.’ 2d Suppl. Br., ECF No. 42; Defs.’ Resp. to Pls.’ 2d Suppl. Br., ECF No. 43; Pls.’
    Resp. to Defs.’ 2d Suppl. Br., ECF No. 44.) In its brief, Otay Mesa insists that the
    “occupied” prong of the critical habitat provision is inapposite because the shrimp are
    indisputably only present in the pond and not anywhere else on the 56 surrounding
    acres. (See Pls.’ 2d Suppl. Br. at 8.) Otay Mesa argues further that the FWS erred in
    8
    delineating all 56 acres as “unoccupied” critical habitat because the presence of PCEs,
    standing alone, is insufficient to support an unoccupied critical habitat designation (id.
    at 8–17); instead, according to Otay Mesa, the unoccupied critical habitat standards
    required the FWS to “determine how much, if any, of the 56 acres was necessary to
    water the stock pond[,]” and to make a specific finding that “this area was essential to
    the conservation of the species[,]” given “that existing occupied habitat was
    inadequate” (id. at 14). Otay Mesa also maintains that this Court should not afford any
    weight to the Ninth Circuit’s decision in Alaska Oil, because that case dealt with the
    designation of occupied critical habitat for a species that was highly mobile, while this
    case concerns unoccupied critical habitat for an essentially immobile species. (Id. at
    17.)
    For their part, Defendants insist that the FWS “relied primarily” on the occupied
    prong of the ESA’s critical habitat definition, and that the prescriptions of that
    provision apply to the instant circumstances. (Defs.’ 2d Suppl. Br. at 7.) In
    Defendants’ view, the Riverside fairy shrimp species “occupies” the stock pond and
    also all of the surrounding acres (despite the actual confinement of the animals
    themselves to the pond) within the plain meaning of the statute, and furthermore Alaska
    Oil teaches that it is permissible for the FWS to rely solely on the presence of the PCEs
    on the acres surrounding the pond, without studying runoff or conducting any other
    kind of hydrologic analysis, in order to delineate “the specific areas within the
    geographical area occupied by the species[,]” 16 U.S.C. § 1532(5)(A)(i). (See Defs.’ 2d
    Suppl. Br. at 7–20.) Defendants further argue that the FWS properly designated the
    stock pond and the 56 surrounding acres as unoccupied critical habitat in the
    9
    alternative, see 16 U.S.C. § 1532(5)(A)(ii) (authorizing designation of areas “outside
    the geographical area occupied by the species” if the Secretary determines such areas
    “are essential for the conservation of the species”), because the general loss of vernal
    pool habitat in this area of San Diego County necessitates the preservation of this
    known vernal pool, and because the Riverside fairy shrimp in this particular pool have
    unique genetics. (See Defs.’ 2d Suppl. Br. at 11–16.) Defendants also maintain that,
    since no hydrologic studies were readily available at the time of the designation and the
    ESA only requires that the agency rely on the best available data, the FWS did not need
    to conduct any hydrologic analysis to support this unoccupied critical habitat
    designation. (See 
    id. at 16–19.)
    With the two rounds of supplemental briefing complete, the parties’ renewed
    motions for summary judgment are now ripe for this Court’s consideration.
    II.    LEGAL STANDARDS
    A.     Summary Judgment in APA Cases
    Summary judgment is the appropriate means for determining, as a matter of law,
    if “agency action is supported by the administrative record and is otherwise consistent
    with the APA standard of review.” Hill Dermaceuticals, Inc. v. FDA, No. 11-1950,
    
    2012 WL 5914516
    , at *7 (D.D.C. May 18, 2012) (citing Richard v. INS, 
    554 F.2d 1173
    ,
    1177 & n.28 (D.C. Cir. 1977)). While the ordinary summary judgment standard is laid
    out in Federal Rule of Civil Procedure 56, “it is well established that, in cases involving
    review of a final agency action[,] . . . the standard set forth in [Rule 56] does not apply
    because of the limited role of [the] court in reviewing the administrative record.”
    Otsuka Pharm. Co., Ltd. v. Burwell, 
    302 F. Supp. 3d 375
    , 389 (D.D.C. 2016), aff’d sub
    10
    nom. Otsuka Pharm. Co. v. Price, 
    869 F.3d 987
    (D.C. Cir. 2017) (alterations in
    original) (internal quotation marks and citation omitted). In this context, the function
    of the agency is “to resolve factual issues to arrive at a decision that is supported by the
    administrative record, whereas ‘the function of the district court is to determine whether
    or not as a matter of law the evidence in the administrative record permitted the agency
    to make the decision it did.’” Stuttering Found. of Am. v. Springer, 
    498 F. Supp. 2d 203
    , 207 (D.D.C. 2007) (quoting Occidental Eng’g Co. v. INS, 
    753 F.2d 766
    , 769 (9th
    Cir. 1985)). In other words, “the district judge sits as an appellate tribunal[,]” Am.
    Bioscience, Inc. v. Thompson, 
    269 F.3d 1077
    , 1083 (D.C. Cir. 2001), and “[t]he entire
    case on review is a question of law, and only a question of law[,]” Marshall Cnty.
    Health Care Auth. v. Shalala, 
    988 F.2d 1221
    , 1226 (D.C. Cir. 1993); see also Cognitive
    Prof’l Servs. Inc. v. U.S. Small Bus. Admin., 
    254 F. Supp. 3d 22
    , 32 (D.D.C. 2017)
    (making clear that the core legal question is “whether the agency acted arbitrarily or
    capriciously, or in violation of another [APA] standard”) (alteration in original)
    (internal quotation marks and citation omitted)).
    Notably, “[w]hile the court’s review [on summary judgment] must be ‘searching
    and careful, the ultimate standard of review is a narrow one’ and the court ‘is not
    empowered to substitute its judgment for that of the agency.’” Cape Hatteras Access
    Pres. All. v. U.S. Dep’t of Interior, 
    731 F. Supp. 2d 15
    , 21 (D.D.C. 2010) (quoting
    Citizens to Preserve Overton Park v. Volpe, 
    401 U.S. 402
    , 416 (1971)). Moreover, in
    cases involving complex scientific determinations and technical expertise, the Supreme
    Court has directed that the district court “generally be at its most deferential.”
    Baltimore Gas & Electric Co. v. Nat. Res. Def. Council, Inc., 
    462 U.S. 87
    , 103 (1983);
    11
    see also Marsh v. Ore. Nat. Res. Council, 
    490 U.S. 360
    , 377 (1989) (noting that where a
    determination “requires a high level of technical expertise, [a court] must defer to the
    informed discretion of the responsible federal agencies” (internal quotation marks and
    citation omitted)). However, “[t]his deferential standard cannot permit courts [] merely
    to rubber stamp agency actions, nor be used to shield the agency’s decision from
    undergoing a thorough, probing, in-depth review.” Guindon v. Pritzker, 
    31 F. Supp. 3d 169
    , 186 (D.D.C. 2014) (internal quotation marks and citation omitted); see also Otay
    Mesa Prop., L.P. v. U.S. Dep’t of Interior, 
    646 F.3d 914
    , 916 (D.C. Cir. 2011)
    (“Substantial evidence is a deferential standard. But deference is not abdication.”);
    Huff v. Vilsak, 
    195 F. Supp. 3d 343
    , 352 (D.D.C. 2016) (noting that, even under the
    deferential standard of review, “courts retain a role, and an important one, in ensuring
    that agencies have engaged in reasoned decisionmaking, which means the court must
    ensure that the decision was based on a consideration of the relevant factors and
    determine whether there has been a clear error of judgment” (internal quotation marks,
    brackets, and citation omitted)).
    B.     The Chevron Framework
    When assessing the FWS’s interpretation of the Endangered Species Act—a
    statute that that agency administers—this Court is required to apply the familiar two-
    step framework laid out in Chevron, USA., Inc. v. National Resources Defense Council,
    Inc., 
    467 U.S. 837
    (1984). See Ass’n of Private Sector Colls. & Univs. v. Duncan, 
    681 F.3d 427
    , 441 (D.C .Cir. 2012). Step One directs that, if “Congress has directly spoken
    to the precise question at issue,” the Court must give effect to that “unambiguously
    expressed intent[.]” Nat’l Treasury Emps. Union v. Fed. Labor Relations Auth., 
    414 F.3d 50
    , 57 (D.C. Cir. 2005) (internal quotation marks omitted) (quoting Chevron, 
    467 12 U.S. at 842
    –43). In conducting the requisite analysis, the pertinent question is not
    whether the statutory terms at issue are “‘in some abstract sense, ambiguous, but rather
    whether, read in context and using the traditional tools of statutory construction,’ the
    terms unambiguously mean what the party claiming victory at Step One says they
    mean.” 
    Otsuka, 302 F. Supp. 3d at 389
    (quoting Cal. Indep. Sys. Operator Corp. v.
    FERC, 
    372 F.3d 395
    , 400 (D.C. Cir. 2004)); see also Sierra Club v. EPA, 
    551 F.3d 1019
    , 1027 (D.C. Cir. 2008) (explaining that the tools used to evaluate statutory
    provisions include an examination of the provision in its full context and, as
    appropriate, references to legislative history).
    If the statute at issue “can be read more than one way” and is thus properly
    deemed ambiguous, AFL–CIO v. FEC, 
    333 F.3d 168
    , 173 (D.C. Cir. 2003) (citation
    omitted), or if the statute is “silent” regarding the relevant question, Van Hollen, Jr. v.
    FEC, 
    811 F.3d 486
    , 495 (D.C. Cir. 2016), the Court must proceed to Step Two, wherein
    such ambiguity or silence is generally considered to be “‘an implicit delegation from
    Congress to the agency to fill in the statutory gaps[,]’” 
    id. at 495
    (quoting FDA v.
    Brown & Williamson Tobacco Corp., 
    529 U.S. 120
    , 159 (2000) (emphasis omitted)).
    Accordingly, the nature of judicial review at Step Two is “highly deferential[,]” Vill. of
    Barrington, Ill. v. Surface Transp. Bd., 
    636 F.3d 650
    , 667 (D.C. Cir. 2011), meaning
    that the court must “accept the agency’s [reasonable] construction of the statute, even if
    the agency’s reading differs from what the court believes is the best statutory
    interpretation[,]” Nat’l Cable & Telecomms. Ass’n v. Brand X Internet Servs., 
    545 U.S. 967
    , 980 (2005) (citation omitted); see also Peter Pan Bus Lines, Inc. v. Fed. Motor
    Carrier Safety Admin., 
    471 F.3d 1350
    , 1353 (D.C. Cir. 2006) (noting that, at Chevron
    13
    Step Two, the court must defer to the agency’s interpretation of a statute if it is “based
    on a permissible construction of the statute”) (internal quotation marks and citation
    omitted). Significantly for present purposes, although “[a]n agency’s interpretation of
    its enabling statute and its own regulations is usually entitled to deference, . . . there are
    limits on when and how far a court should defer to the agency[, and a court] must
    overturn agency action and interpretation inconsistent with the regulations and statutes
    themselves.” Shepherd v. Merit Sys. Prot. Bd., 
    652 F.2d 1040
    , 1043 (D.C. Cir. 1981).
    C.     The Endangered Species Act
    As explained fully in this Court’s prior opinion in this case, “Congress enacted
    the Endangered Species Act in 1973 with the aim of conserving and protecting
    endangered and threatened species and the ecosystems on which those species depend.”
    Otay Mesa Prop., 
    144 F. Supp. 3d
    at 40 (citing 16 U.S.C. § 1531(b)); see also Alaska
    Oil & Gas 
    Ass’n, 815 F.3d at 550
    –51 (“The purpose of the ESA is to ensure the
    recovery of endangered and threatened species, not merely the survival of their existing
    numbers.”), cert. denied sub nom. Alaska Oil & Gas Ass’n v. Zinke, 
    137 S. Ct. 2091
    (2017), Alaska v. Zinke, 
    137 S. Ct. 2110
    (2017). To accomplish this goal, the Act
    directs the Secretary of the Interior to list “endangered” and “threatened” species for
    federal protection, 16 U.S.C. §§ 1532(6), (20), and also to designate geographical areas
    as “critical habitat” for listed species, where appropriate, 
    id. § 1533(a)(3)(A)(i).
    “The
    Department of the Interior administers the ESA for non-marine species and has
    delegated to the Fish and Wildlife Service (an agency within the Interior Department)
    the authority to list such species as ‘endangered’ or ‘threatened’ through rulemaking.”
    Otay Mesa Prop., 
    144 F. Supp. 3d
    at 40 (citing 50 C.F.R. § 402.01 (2015)). The FWS
    is also authorized to make the “critical habitat” determination. See 50 C.F.R. § 424.10.
    14
    When the agency undertakes to list a species under the ESA or make a critical habitat
    designation, the ESA requires the agency to rely on the best available scientific data.
    See 16 U.S.C. § 1533(b).
    As relevant here, the ESA delineates two types of critical habitat for endangered
    species:
    (i)    the specific areas within the geographical area
    occupied by the species, at the time it is listed [as
    endangered or threatened under the statute], on which
    are found those physical or biological features (I)
    essential to the conservation of the species and (II)
    which may require special management considerations
    or protection; and
    (ii)   specific areas outside the geographical area occupied
    by the species at the time it is listed . . . , upon a
    determination by the Secretary that such areas are
    essential for the conservation of the species.
    16 U.S.C. § 1532(5)(A). Subdivision (i) is commonly referred to as “occupied” critical
    habitat, while subdivision (ii) is typically termed “unoccupied” critical habitat. The
    Act further instructs that, “[e]xcept in those circumstances determined by the Secretary,
    critical habitat shall not include the entire geographical area which can be occupied by
    the threatened or endangered species.” 
    Id. § 1532(5)(C)
    (emphasis added). Properly
    understood, then, the statutory text of the ESA plainly requires the agency to start by
    delineating the geographical area that the species at issue occupies, and then proceed to
    determine the critical habitat by reference to that area, with occupied critical habitat
    being a subset of that area (or in exceptional cases, coextensive with that area) and
    unoccupied critical habitat consisting of specific geographical areas outside the area
    occupied by the species. See 
    id. § 1532(5)(A).
    15
    Importantly, the Secretary of the Interior has promulgated regulations that
    pertain to how the agency implements the ESA’s critical habitat requirements. See 50
    C.F.R. § 424.12 (titled “Criteria for designating critical habitat”); see 
    id. § 424.12(b)
    (specifying that, “[w]here designation of critical habitat is prudent and determinable,
    the Secretary will identify specific areas within the geographical area occupied by the
    species at the time of listing and any specific areas outside the geographical area
    occupied by the species to be considered for designation as critical habitat”). With
    respect to determining the occupied critical habitat of an endangered species, the
    regulations underscore that occupied critical habitat should be a portion of the overall
    area that a species occupies, by instructing the Secretary to:
    (i) Identify the geographical area occupied by the species at
    the time of listing.
    (ii) Identify physical and biological features essential to the
    conservation of the species at an appropriate level of
    specificity using the best available scientific data. . . .
    (iii) Determine the specific areas within the geographical
    area occupied by the species that contain the physical or
    biological features essential to the conservation of the
    species.
    (iv) Determine which of these features may require special
    management considerations or protection.
    
    Id. § 424.12(b)(1)
    (emphasis added). Similarly, for unoccupied critical habitat, the
    regulations instruct the Secretary to “identify, at a scale determined by the Secretary to
    be appropriate, specific areas outside the geographical area occupied by the species that
    are essential for its conservation, considering the life history, status, and conservation
    needs of the species based on the best available scientific data.” 
    Id. § 424.12(b)(2)
    (emphasis added). Neither the statute nor the applicable regulations defines “the
    16
    geographical area occupied by the species”—i.e., the key reference point in making the
    critical habitat designation under the statute—and neither explains how the Secretary
    should go about identifying this geographical area.
    III.   ANALYSIS
    It has taken years of litigation and multiple rounds of briefing, but the core legal
    question underlying the parties’ dispute in this matter has now become apparent. This
    issue—the appropriateness of the FWS’s methodology for drawing the boundaries of the
    critical habitat for the Riverside fairy shrimp—implicates two relatively straightforward
    questions of statutory interpretation: first, whether the FWS’s manner of determining
    “the geographical area occupied by the [Riverside fairy shrimp] species” is consistent
    with the ESA, and second, whether the FWS acted consistently with the ESA and
    applicable regulations when it identified the critical habitat of the Riverside fairy
    shrimp solely vis-à-vis the topography of the pertinent geographical without further
    analysis of whether and to what extent the area actually functions as watershed. As
    explained below, this Court has determined that, even after granting the FWS the
    deference that it is due under Chevron, the agency’s identification of the geographical
    area occupied by the Riverside fairy shrimp was unreasonable and therefore arbitrary
    and capricious, which means that the resulting occupied critical habitat determination
    violated the APA. The Court further concludes that the agency’s alternative
    designation of the 56 acres surrounding the stock pond as unoccupied critical habitat
    violated the ESA, because the agency made that determination solely in reference to the
    presence of PCEs and without conducting any further analysis about whether
    preservation of this area was essential for the conservation of the species.
    17
    A.     By Encircling All Vernal Pools Where The Species Has Been Sighted
    As Well As All Land In Between, The FWS Improperly Identified The
    Area Occupied By The Riverside Fairy Shrimp
    Because the ESA defines both “occupied” and “unoccupied” critical habitat in
    reference to “the geographical area occupied by the species[,]” 16 U.S.C. § 1532(5)(A),
    the FWS’s first step in making any critical habitat designation must be to identify the
    “geographical area occupied by the species” at the time that the agency initially listed
    the species, id.; see also 50 C.F.R. § 424.12(b)(1). In the 2012 Rule, the FWS purports
    to delineate the “geographical area occupied by the” Riverside fairy shrimp by
    identifying the outermost geographical boundaries of the various vernal pools in the
    state of California where the shrimp have been sighted, as follows:
    [T]hat area bounded by the coastline to the west, east to an
    area near tribal land of the Pechanga Band of Luiseño
    Mission Indians of the Pechanga Reservation, California, in
    western Riverside County, north into the central foothills of
    Orange County near the former Marine Corps Air Station
    (MCAS) El Toro, and south to coastal mesa tops along the
    United States-Mexico Border in San Diego County.
    77 Fed. Reg. 72081. The rule further notes that, in the years since the Riverside fairy
    shrimp was first listed as endangered in 1993, the species has been documented in
    additional areas in Ventura, Orange, Riverside, and San Diego counties in California,
    and that the FWS considers these additional areas to also be within the geographical
    area that the Riverside fairy shrimp occupied when it was listed. See 
    id. Nowhere in
    the briefing of the issues in this case does the FWS discuss, much
    less justify, its apparent threshold determination that the Riverside fairy shrimp species
    “occupies” this entire geographical area such that it is appropriate to designate large
    swaths of land within this area as occupied critical habitat under the ESA. (See, e.g.,
    Defs.’ Combined Opp’n to Pls.’ Mot. for Summ. J. & Mem. in Supp. of Cross-Mot. for
    18
    Summ. J. (“Defs.’ MSJ Mem.”), ECF No. 14-1, at 22–30 (ignoring the rule’s initial
    finding regarding the geographical area the species occupies and arguing solely that the
    vernal pool and 56 additional acres of land that constitute Subunit 5c are properly
    characterized as occupied critical habitat for ESA purposes because that subunit
    contains both a pool where shrimp have been found and the requisite PCEs).) And for
    the reasons explained below, it is clear to this Court that it is manifestly unreasonable
    for the FWS to have determined that this entire geographic area is “occupied” by the
    Riverside fairy shrimp. Thus, even under Chevron’s two-step framework, this Court
    cannot countenance the FWS’s decision to interpret the ambiguous statutory term
    “occupied” to include all of the various vernal pools in the state of California where the
    Riverside fairy shrimp actually reside and also all of the land in between those pools,
    which means that the 2012 Rule violates the terms of the ESA at the outset, even prior
    to setting forth the particular critical habitat designation that Otay Mesa challenges in
    this case.
    1.     Although The Term “Occupied” As It Appears In The ESA Is
    Ambiguous, The FWS’s Determination That The Riverside Fairy
    Shrimp Occupies Areas Where The Shrimp Are Not (And Can In
    Fact Never Be) Located Is Unreasonable
    It is undisputed that the ESA does not define the term “occupied” or the related
    and repeated phrase “geographical area occupied by the species[.]” See, e.g., Cape
    Hatteras Access Pres. 
    All., 344 F. Supp. 2d at 119
    . To be sure, the lack of a definition
    alone does not render a word or phrase in a statute ambiguous, see Otsuka Pharm. 
    Co., 302 F. Supp. 3d at 394
    ; however, several courts have evaluated the term “occupied” as
    it is used in the ESA, and as far as this Court can tell, the unanimous conclusion is that
    this term is ambiguous for Chevron purposes. See, e.g., N.M. Farm & Livestock Bureau
    19
    v. U.S. Dep’t of the Interior, No. 15cv00428, 
    2017 WL 4857444
    , at *3 (D.N.M. Oct. 25,
    2017) (noting that “[t]he term ‘occupied’ as used in the ESA has been found to be
    ambiguous and not plainly defined” (citation omitted)); Cape Hatteras Access Pres.
    
    All., 344 F. Supp. 2d at 120
    (noting that “[t]he Service does not have a regulation that
    imposes a single definition of ‘occupied’ for all species; rather, the Service has retained
    flexibility and defines the term differently depending on a given species’s
    characteristics”); cf. Ariz. Cattle Growers’ 
    Ass’n, 606 F.3d at 1164
    (demonstrating the
    ambiguous nature of the term by substituting “resides” for “occupied” and noting
    that,“[v]iewed narrowly, an owl resides only in its nest; viewed more broadly, an owl
    resides in a [Protected Activity Center]; and viewed more broadly still, an owl resides
    in its territory or home range”).
    This Court agrees that “occupied” is susceptible to more than one meaning in the
    context in which that term appears in the ESA; therefore, that term is properly
    considered ambiguous such that the FWS is entitled to deference in its construction of it
    in the context of the instant case. See 
    Chevron, 467 U.S. at 842
    –43; see also Otsuka
    Pharm 
    Co., 302 F. Supp. 3d at 174
    (noting that the relevant question for Chevron Step
    One is whether a statutory provision “[is]susceptible of multiple plausible
    interpretations and [is] thus ambiguous, or whether there is only one possible
    interpretation of this statutory language” (internal citations omitted)); Am. Meat Inst. v.
    U.S. Dep’t of Agric., 
    968 F. Supp. 2d 38
    , 59 (D.D.C. 2013) (noting that “ambiguity in
    [a] statutory term would require this Court to proceed to evaluate the permissibility of
    the agency's interpretation under Chevron’s step two [which] requires the Court to defer
    to an agency’s interpretation of a statute unless that interpretation is impermissible”
    20
    (internal citations omitted)), aff’d en banc, 
    760 F.3d 18
    (D.C. Cir. 2014). But the
    deference that the FWS is owed with respect to its interpretation of “occupied” in
    regard to the designation of critical habitat for the Riverside fairy shrimp must give way
    to the plain language of the ESA when the agency’s construction of that term is
    scrutinized for permissibility under Chevron’s Step Two. See Cognitive Prof’l 
    Servs., 254 F. Supp. 3d at 33
    (explaining that, under Step Two, the court determines whether
    the agency’s interpretation of an ambiguous term “‘is based on a permissible
    construction of the statute’” (quoting 
    Chevron, 467 U.S. at 843
    )); see also Mayo Found.
    for Med. Educ. & Research v. U.S., 
    562 U.S. 44
    , 53 (2011) (explaining that, where a
    statute is silent as to a relevant question, Chevron requires courts to defer to the
    agency’s construction of that statute “unless it is arbitrary or capricious in substance, or
    manifestly contrary to the statute”).
    To understand why the instant “occupied” determination fails at Chevron Step
    Two, recall that in the instant case the FWS identified the geographical area that is
    occupied by the Riverside fairy shrimp by locating on a map the various isolated vernal
    pools where Riverside fairy shrimp have been sighted and encircling not only all of
    those pools but also all of the land around and between them. See 77 Fed. Reg. 72081
    (describing a single area extending east-to-west from the Pacific coast to western
    Riverside County, CA, and north-to-south from Orange County, CA to the United
    States-Mexico border). This methodology—i.e., determining the entire radius of the
    geographical area where the animal has been spotted—appears to be one that the agency
    routinely employs as the first step of making a critical habitat designation, and it seems
    imminently logical to do precisely this when the FWS is considering a critical habitat
    21
    designation for a mobile species that might use one geographical area for eating,
    another area for reproducing, and still another area for sleeping. See, e.g., Ctr. for
    Biological Diversity v. Ross, 
    310 F. Supp. 3d 119
    , 123 (D.D.C. 2018) (noting that the
    critical habitat for a migratory whale species extended from Maine to Florida because
    the whales “migrate annually from their summer feeding grounds off the Northeast
    Coast of the United States to their winter breeding grounds off the Southeast Coast”
    (internal quotation marks and citation omitted)).
    Indeed, in such cases, the ‘occupancy’ question that commonly arises is “how
    frequently a species must use an area” before an agency can properly deem the species
    to occupy that area for the purpose of determining its critical habitat, which is
    admittedly a “highly contextual and fact-dependent inquiry.” Ariz. Cattle Growers’
    
    Ass’n, 606 F.3d at 1164
    . Relevant factors for making this threshold occupancy
    determination include “how often the area is used, how the species uses the area, the
    necessity of the area for the species’ conservation, [and] species characteristics such as
    degree of mobility or migration,” 
    id., as well
    as whether “individual members of the
    protected species are likely to be found there [and] whether or not the area holds a
    resident breeding population[,]” N.M. Farm & Livestock Bureau, 
    2017 WL 4857444
    , at
    *3. And where “the [species] uses [the area] with sufficient regularity that it is likely
    to be present during any reasonable span of time[,]” courts have generally deferred to
    the FWS’s determination that a species occupies that particular geographic area. Ariz.
    Cattle Growers’ 
    Ass’n, 606 F.3d at 1164
    ; see also Cape Hatteras Access Pres. 
    All., 344 F. Supp. 2d at 120
    (finding that the FWS had permissibly construed the statute where its
    method of determining whether the species occupied a geographical area was to “look
    22
    for areas with ‘consistent use,’ which [the FWS] defined as those areas where
    ‘observations over more than one wintering season’ demonstrated [the species’]
    presence[]”).
    Generally speaking, the FWS’s look-for-consistent-use-by-the-listed-species
    approach to determining the geographical area of occupancy is a permissible and
    reasonable construction of the statutory term “occupied” because “to occupy” means “to
    take up residence in[.]” Merriam-Webster Dictionary, 6 and because the text and
    structure of the ESA plainly indicate that Congress intended for the agency to locate
    those areas where the endangered or threatened species physically exists, at least for
    some period of time, and then determine which areas “within” that location qualify as
    critical habitat as defined by the statute. See 16 U.S.C. § 1532(5)(A)(i) (emphasis
    added). But the FWS appears to have abandoned this methodology as applied to the
    instant “not migratory” species. See 77 Fed. Reg. 72079; see also 
    id. at 72081
    (explaining that the Riverside fairy shrimp is “relatively sedentary and possesses
    limited dispersal capabilities”). That is, rather than acknowledging the undisputed
    scientific fact that the vernal pools themselves are the only geographical areas where
    individual Riverside fairy shrimp are “likely to be found[,]” N.M. Farm & Livestock
    Bureau, 
    2017 WL 4857444
    at *3, or that the species “uses with sufficient
    regularity[,]”Ariz. Cattle Growers’ 
    Ass’n, 606 F.3d at 1164
    , the FWS has included in its
    area of occupancy for this species the land around these pools, where the species has
    never been found and could never physically exist. See 77 Fed. Reg. 72081. The
    FWS’s reading also defies logic: under its interpretation of “occupied,” if two vernal
    6
    Located at http://unabridged.merriam-webster.com/unabridged/occupy (last visited Sept. 24, 2018).
    23
    pools containing Riverside fairy shrimp cysts were sighted on either side of the Mojave
    desert, the agency could deem all of the desert area between the two ponds as the
    “geographical area occupied by the species” even though the species has never been,
    and could never be, present in the desert. There is nothing about the ESA’s use of
    “occupied,” or the plain meaning of that term, or, quite frankly, common sense, that
    permits this result. See Ariz. Cattle Growers’ 
    Ass’n, 606 F.3d at 1164
    (emphasizing the
    Riverside fairy shrimp’s limited “degree of mobility or migration”).
    What is more, the FWS’s inclusion of geographical areas where no shrimp are
    located in its occupancy finding for ESA purposes, simply and solely because such
    areas are adjacent to where shrimp have been found, clearly runs afoul of the D.C.
    Circuit’s decision in Otay Mesa Property, L.P. v. U.S. Department of Interior, 
    646 F.3d 914
    (D.C. Cir. 2011). The panel in that case evaluated the designation of 143 acres of
    Otay Mesa’s land as occupied critical habitat for a different species of fairy shrimp (the
    San Diego fairy shrimp). The Circuit found that, because there had only been a single
    sighting of four shrimp in one tire rut on the property, four years after the species was
    listed as endangered, the FWS had improperly designated the land as occupied critical
    habitat. 
    Id. at 916–17.
    Furthermore, and notably, the panel rejected the FWS’s
    argument that, even if no shrimp had been located on the property itself, the property
    was nonetheless “occupied” by the shrimp because it was part of a vernal pool complex
    connected to other locations where shrimp had been observed. 
    Id. at 918.
    In rejecting
    this argument, the Circuit emphasized that “the potential existence of San Diego fairy
    shrimp outside plaintiffs’ property does not itself show that San Diego fairy shrimp
    occupy plaintiffs’ property[.]” 
    Id. 24 So
    it is here. Rather than focusing on whether and to what extent the Riverside
    fairy shrimp species actually occupies the particular geographical area that it seeks to
    designate, the FWS has located the various pools where the shrimp have been seen and,
    as a threshold matter, has deemed all of the land around and between those pools—even
    land on which the shrimp cannot possibly reside—as “occupied” territory. This
    methodology is patently inconsistent with the statute’s requirement that the agency
    locate the geographic areas where the species is present (i.e., those areas the species
    occupies), and as a result, the agency’s interpretation of the statute to include areas on
    which the species does not and cannot exist is not entitled to deference. See 
    Shepherd, 652 F.2d at 1043
    . Put in the vernacular of APA jurisprudence, the agency has “failed to
    consider an important aspect of the problem”—i.e., actual occupancy status of the
    shrimp—or has offered “an explanation for its decision that runs counter to the
    evidence before the agency” with respect to the threshold area-of-occupancy
    determination, Motor Vehicle Mfrs. Ass’n of U.S., Inc. v. State Farm Mut. Auto. Ins.
    Co., 
    463 U.S. 29
    , 43; therefore, its related determination that the vernal pool and the 56
    acres of surrounding land constitute occupied critical habitat must be deemed arbitrary
    and capricious and in violation of the APA, 
    id. 2. The
    Vernal Pool On Subunit 5c Is The Only Geographical Area
    That The Riverside Fairy Shrimp Species Occupies
    In the briefs that the agency has submitted in regard to this matter, counsel for
    Defendants appears to argue (contrary to the text of the published crucial habitat
    designation) that the geographical area that the Riverside fairy shrimp species occupies
    for present purposes is the 57-acre subunit upon which the one-acre stock pond (vernal
    pool) sits. (See Defs.’ MSJ Mem. at 17.) The briefing contains little explanation as to
    25
    how the FWS determined, based on sightings that were limited to the stock pond, that
    Riverside fairy shrimp occupy all of Subunit 5c, and the 2012 Rule, which indicates
    that the FWS has found that “[t]his subunit is currently occupied” by the shrimp based
    on a 2011 survey that “documented the presence of Riverside fairy shrimp cysts” in the
    pool bed, 77 Fed. Reg. 72092, is of little help. See 
    id. (purporting to
    explain the FWS’s
    determination that “[t]his subunit is essential for the conservation of Riverside fairy
    shrimp because its occupied pool and surrounding watershed are essential to maintain
    habitat function, genetic diversity, and species viability”). Importantly, at the motion
    hearing held in this matter, counsel for FWS explained the agency’s methodology for
    concluding that this area was “occupied” critical habitat: it searched for the PCEs that
    the FWS had identified for this shrimp species on a map of the area, and then circled
    both the stock pond and all adjacent land areas where all three PCEs exist. (See Mot.
    Hr’g Tr., 41:4–42:24, Mar. 15, 2017.)
    If this is, in fact, how the FWS determined that the Riverside fairy shrimp
    species occupies all 56 acres of land surrounding the stock pond, the agency has
    improperly ignored the process the ESA designates for making an occupied critical
    habitat determination. See State Farm Mut. Auto. Ins. 
    Co., 463 U.S. at 43
    .
    Specifically, as noted above, the statute contemplates that the agency will first
    determine “the geographical area occupied by the species” and then proceed to identify
    the “areas within the geographical area occupied by the species” on which the PCEs are
    found. 16 U.S.C. § 1532(5)(A)(i) (emphasis added). This reading is underscored by the
    governing regulations, which require the FWS to begin by “(i) [i]dentify[ing] the
    geographical area occupied by the species at the time of listing” and also “(ii)
    26
    [i]dentify[ing] physical and biological features essential to the conservation of the
    species at an appropriate level of specificity using the best available scientific data.”
    50 C.F.R. § 424.12(b)(1). And it is only after the FWS has made these individual
    determinations that the regulations require FWS to “(iii) [d]etermine the specific areas
    within the geographical area occupied by the species that contain the physical or
    biological features essential to the conservation of the species.” 
    Id. This statutorily-
    prescribed procedure—first, determining what area a species occupies and the relevant
    PCEs for the species, and thereafter determining whether and to what extent the PCEs
    exist “within the geographical area occupied by the species” 
    id. (emphasis added)—
    means that the occupied critical habitat will never be more expansive than the actual
    area of occupancy, and indeed, may not even be the entirety of the occupied area. See
    16 U.S.C. § 1532(5)(C) (“Except in those circumstances determined by the Secretary,
    critical habitat shall not include the entire geographical area which can be occupied by
    the threatened or endangered species.”). Moreover, and notably, the FWS’s decision to
    determine the area that the Riverside fairy shrimp species occupies by identifying the
    PCEs that exist on or near the place where the species is located and drawing a circle
    around the entire geographic area where the PCEs exist results in a critical habitat
    determination that is more expansive than the area in which the species is found, and
    thus conflicts with the statute’s plain text. See 
    id. Therefore, it
    is clear to this Court
    that the manner in which the FWS designated the stock pond and the surrounding 56
    acres as occupied critical habitat violates the APA. See Mayo Found. for Med. Educ. &
    
    Research, 562 U.S. at 54
    ; 
    Shepherd, 652 F.2d at 1043
    .
    27
    In response, Defendants are quick to point out that this Court previously found
    that “the FWS did not act arbitrarily or capriciously when it determined that endangered
    Riverside fairy shrimp occupy the vernal pool on Subunit 5c and that the pool and the
    surrounding watershed area are ‘critical habitat’ for that listed species within the
    meaning of the ESA,” under either the occupied or unoccupied prong. Otay Mesa
    Prop., 
    144 F. Supp. 3d
    at 69. (See also Defs.’ 2d Suppl. Br. at 5, 8–9 (describing this
    Court’s prior holding).) The Court did make that finding. But it also expressly noted
    that the record before the Court did not permit it to assess how the FWS had gone about
    delineating the contours of the area beyond the pool that it deemed occupied critical
    habitat. See Otay Mesa Prop., 
    144 F. Supp. 3d
    at 69. In any event, “a district court has
    inherent authority to reconsider its interlocutory orders as justice requires[,]” United
    States v. All Assets Held at Bank Julius, Baer & Co., Ltd., 
    315 F. Supp. 3d 90
    , 96
    (D.D.C. 2018) (internal quotation marks and citation omitted), and this is especially so
    with respect to findings that the Court initially (and mistakenly) considered immaterial
    to the legal issue at hand. Indeed, in this case, it only became apparent after the hearing
    was held and the supplemental briefs were filed that the FWS’s methodology had
    improperly melded two distinct statutory steps—(1) identifying the area that a species
    occupies and what the PCEs are, and (2) determining where the PCEs are located within
    the occupied area. (See 2d Suppl. Br. Order at 4 (indicating that, “although this Court
    has previously asserted that the distinction between ‘occupied’ and ‘unoccupied’ is
    ‘seemingly immaterial to the APA claim at hand[,]’ given the parties’ current
    disagreement about the suitability of the methodology that the agency employed to
    reach the critical habitat designation at issue here, it is now clear to the Court, that the
    28
    ‘occupied’ versus ‘unoccupied’ determination matters” (quoting Otay Mesa Prop., 
    144 F. Supp. 3d
    at 61) (alteration in original) (citation omitted)).
    Furthermore, this Court’s supplemental briefing order put the parties on notice
    that the Court might need to revisit the issue of whether the acreage surrounding the
    pond qualifies as “occupied” or “unoccupied” critical habitat. (See 
    id. (explaining that
    the question of whether the critical habitat designation violates the ESA “may turn on a
    threshold issue that this Court did not reach when it considered the parties’ first round
    of summary judgment briefs: whether and to what extent, per the ESA, the geographic
    area surrounding the stock pond qualifies ‘occupied’ or ‘unoccupied’ terrain”).) Thus,
    this Court rejects Defendants’ suggestion that the issue of whether all of Subunit 5c is
    occupied has already been definitively resolved and is therefore not at issue in the
    context of this briefing. (See Defs.’ 2d Suppl. Br. at 8 (“The Court has already upheld
    FWS’ conclusion that [S]ubunit 5c is within the geographical area occupied by the
    species at the time of listing.”) 7
    As explained above, this Court finds that the approach that the FWS has
    espoused in its brief for designating the pond and the additional 56 acres of land as
    “occupied” by relying on the PCEs is inconsistent with the ESA. By contrast, under a
    permissible construction of the statute, the record evidence in this case establishes that
    the Riverside fairy shrimp occupy the one-acre stock pond on Subunit 5(c) (see AR
    7
    To the extent that any portion of this Court’s earlier ruling could be considered law of the case on the
    issue of whether the Riverside fairy shrimp occupy the entirety of the designated area, this Court finds
    it proper to exercise its discretion to revisit this issue here in light of the Court’s misunderstanding
    about the agency’s arguments regarding its methodology. See Pepper v. United States, 
    562 U.S. 476
    ,
    506–07 (2011) (noting that the law of the case doctrine “directs a court’s discretion, it does not limit
    the tribunal’s power” and that it “does not apply if the court is convinced that [its prior decision] is
    clearly erroneous and would work a manifest injustice” (alteration in original) (internal quotation
    marks and citation omitted)).
    29
    003806–11, 004784–817, 037261–76), and that two of the three PCEs that pertain to the
    Riverside fairy shrimp—i.e., “ephemeral wetland habitat” (PCE 1) and “the topography
    and soils that support ponding during winter and spring months” (PCE 3) (id 055645)—
    exist throughout the entirety of that pond, such that the one-acre pond itself qualifies as
    “the specific area[] within the geographical area occupied by the species . . . on which
    are found those physical or biological features (I) essential to the conservation of the
    species and (II) which may require special management considerations or protection”
    per the plain text of the section 1532(5)(A)(i) of Title 16 of the United States Code.
    This means that the stock pond itself can be properly designated as “occupied” critical
    habitat consistent with the ESA, and it also compels the conclusion that the FWS’s
    extension of the “occupied” critical habitat designation to the entirety of Subunit 5(c)—
    the additional 56 acres of land surrounding the stock pond where the species do not and
    cannot exist but where the PCEs are present—was an unauthorized (i.e., arbitrary and
    capricious) critical habitat determination that violated the APA.
    Alaska Oil and Gas Association v. Jewell, 
    815 F.3d 544
    (9th Cir. 2016), does not
    demand a different result. (See Defs.’ 2d Suppl. Br. at 20–21 (citing to Alaska Oil and
    arguing that, “after determining that the stock pond was occupied, FWS appropriately
    used the best available science to identify the areas around the pond that contain the
    PCEs essential for the conservation of Riverside fairy shrimp to delineate the
    boundaries for that area of ‘occupied’ critical habitat”).) In Alaska Oil, the question of
    occupancy was not at issue, because the geographical areas that the agency designated
    as occupied were indisputably within the polar bear’s range. See Alaska 
    Oil, 815 F.3d at 558
    (noting that the FWS’s mapping methodology was “designed to capture a
    30
    ‘robust’ estimation of the inland extent of den use”). Instead, the dispute in that case
    centered on whether the FWS has to establish, relative to the boundaries of the occupied
    territory, “specifically where, within that area [each of the PCEs] were located.” 
    Id. at 557.
    As relevant here, the species at issue in Alaska Oil was highly mobile and
    indisputably moved throughout all of the territory that the agency had designated as
    occupied. See 
    id. at 559.
    Thus, the Ninth Circuit’s suggestion that the occupied critical
    habitat determination is to be made with reference to the location of the PCEs under the
    circumstances presented in that case does not answer the question of whether and to
    what extent the threshold question of occupancy can be made with reference to the
    PCEs given the static species at issue here.
    In short, while this Court recognizes that it can be “difficult to distinguish
    between occupied and unoccupied areas due to the nature of vernal pools” as a general
    matter because “[t]he size of a vernal pool . . . fluctuates from year to year, and in some
    years, the pool itself may never form[,]” Home Builders Ass’n of N. Cal. v. U.S. Fish &
    Wildlife Serv., S-05-0629, 
    2006 WL 3190518
    , at *14 (E.D. Cal Nov. 2, 2006), there is
    simply no evidence in the instant record that the Riverside fairy shrimp have ever
    occupied any part of Subunit 5(c) other than the one-acre stock pond, which is the only
    vernal pool on that property. It is true that the statutory term “occupied” is ambiguous,
    which means that the FWS generally has flexibility and discretion to interpret that term
    and to apply it to the facts presented when it makes its critical habitat designation, but
    the agency must exercise that discretion in a manner that is consistent with the plain
    text of the statute, and the statute plainly requires the agency to identify the geographic
    area that an endangered species “occupie[s]”—separate and apart from the PCEs—and
    31
    then assess where the PCEs exist “within” that geographic area. 16 U.S.C.
    § 1532(5)(A) (i). Consequently, it is inconsistent with the methodology that the ESA
    prescribes for the FWS to have defined the area that the Riverside fairy shrimp species
    occupies (and by extension designate the occupied critical habitat for that species)
    merely by locating the geographic area around and beyond the stock pond where the
    PCEs exist (i.e., the entirety of Subunit 5(c)), and as a result, this Court concludes that
    the agency’s occupied critical habitat determination violates the APA. State Farm Mut.
    Auto. Ins. 
    Co., 463 U.S. at 43
    .
    B.     The Unoccupied Critical Habitat Designation Violates The ESA And
    The APA Because The FWS Did Not Evaluate Whether Any Area
    Outside The Geographical Area Occupied By The Species Is Essential
    For Conservation Of The Species
    The ESA plainly “differentiates between ‘occupied’ and ‘unoccupied’ areas,
    imposing a more onerous procedure on the designation of unoccupied areas by requiring
    the Secretary to make a showing that unoccupied areas are essential for the
    conservation of the species.” Ariz. Cattle Growers’ 
    Ass’n, 606 F.3d at 1163
    . In other
    words, while the designation of “occupied critical habitat” under the ESA turns on the
    identification of the areas that the species occupies and where the PCEs exist within
    those areas, the designation of “unoccupied critical habitat” requires a determination
    that geographical areas that the species does not occupy “are essential for the
    conservation of the species.” 16 U.S.C. § 1532(5)(A)(ii). Of course, this distinction
    makes imminent sense, because the United States is a massive geographical area filled
    with natural flora and fauna, and thus environmental laws such as the ESA “must
    balance the oft-competing statutory policies of environmental protection and private
    property rights.” Selkirk Conservation All. v. Forsgren, 
    336 F.3d 944
    , 965 (9th Cir.
    32
    2003). To avoid overprotection of creatures to the detriment of landowners, Congress
    decided to protect geographical areas that an endangered or threatened species actually
    occupies when those areas contain features essential to conserve the species, see 16
    U.S.C. § 1532(5)(A)(i), and beyond the geographical areas that such a species occupies,
    only those areas that are in and of themselves essential to the conservation of the
    species need to be preserved, see 
    id. § 1532(5)(A)(ii).
    See Jaclyn Lopez, Biodiversity
    on the Brink: The Role of “Assisted Migration” in Managing Endangered Species
    Threatened with Rising Seas, 39 Harv. Envtl. L. Rev. 157, 170 (2015) (noting that
    “[t]he designation of unoccupied critical habitat does not require that the Service
    identify physical and biological features essential to the conservation of the species or
    which may require special management considerations or protection, only that it is
    essential for the conservation of the species”).
    When the FWS announced in the 2012 Rule that Subunit 5(c) is occupied critical
    habitat for the Riverside fairy shrimp and would be designated as unoccupied critical
    habitat in the alternative, see 77 Fed. Reg. 72089, the agency gestured to the required,
    “essential for the conservation of the species” finding, 
    id. at 72079,
    but did nothing
    more to substantiate this conclusory finding than observe that the PCEs were present on
    the land. (See infra.) 8 Thus, for the reasons explained below, the agency’s unoccupied
    8
    The FWS appears to have made the alternative “unoccupied critical habitat” finding in response to the
    D.C. Circuit’s decision in Otay Mesa Property, L.P. v. U.S. Department of the Interior, 
    646 F.3d 914
    (D.C. Cir. 2011), wherein, as 
    discussed supra
    , the Circuit reversed the FWS’s designation of 143 acres
    of property that Otay Mesa owns as occupied critical habitat for the San Diego fairy 
    shrimp. 646 F.3d at 915
    . In consideration of the FWS’s argument that the property was essential to the conservation of
    the species even if there was no evidence of occupancy, the Circuit panel acknowledged that the FWS
    had the discretion to designate the property at issue as unoccupied critical habitat, but noted that if the
    FWS opted to proceed in this manner, “then it must say so in its agency decision and justify that
    determination.” 
    Id. at 918.
    In light of this ruling, and “due to the lack of documentation of occupancy,
    such as survey results prior to 1993, for the purposes of this rulemaking [the FWS] determine[d] that
    33
    critical habitat designation is arbitrary and capricious, and in violation of the ESA, for
    APA purposes.
    As an initial matter, it is important to recognize that “Congress did not define
    ‘essential’ but, rather, delegated to the Secretary the authority to make that
    determination.” Markle Interests, L.L.C. v. U.S. Fish & Wildlife Serv., 
    827 F.3d 452
    ,
    464 (5th Cir. 2016) (internal quotation marks and citation omitted), cert. granted sub
    nom. Weyerhaeuser Co. v. U.S. Fish & Wildlife Serv., 
    138 S. Ct. 924
    , 924 (2018). But
    as explained above, that alone does not mean that the FWS’s bald statement that these
    are “areas essential for the conservation of the species” in the 2012 Rule has to be
    accepted. See Nat’l Cable & Telecomms. 
    Ass’n, 545 U.S. at 980
    . For an agency’s
    decision to be upheld at the summary judgment stage when challenged under the APA,
    the agency “must [have] examine[d] the relevant data and articulate[d] a satisfactory
    explanation for its action including a ‘rational connection between the facts found and
    the choice made.’” State Farm Mut. Auto. Ins. 
    Co., 463 U.S. at 43
    (quoting Burlington
    Truck Lines v. United States, 
    371 U.S. 156
    , 168 (1962)); see also Bowman Transp., Inc.
    v. Ark.-Best Freight Sys. Inc., 
    419 U.S. 281
    , 285 (1974) (making clear that the court
    must “consider whether the decision was based on a consideration of the relevant
    factors and whether there has been a clear error of judgment” (internal quotation marks
    and citation omitted)).
    The “essential for the conservation of the species” finding that the FWS made
    here falls far short of this standard. In the 2012 Rule, the FWS asserted that the
    entirety of Subunit 5c qualifies as unoccupied critical habitat because “[t]hese areas are
    these subunits also alternatively meet the definition of [unoccupied] critical habitat in section
    3(5)(A)(ii) of the Act.” 77 Fed. Reg. 72082.
    34
    essential for the conservation of the species, and a designation limited to areas
    documented to have been occupied at the time of listing would be inadequate to ensure
    the conservation of Riverside fairy shrimp.” 77 Fed. Reg. 72082. It appears that the
    agency based this contention solely upon its finding that the relevant PCEs exist on the
    land surrounding the stock pond, and not on an assessment of whether preservation of
    this particular geographical area was necessary (i.e., “essential”) for conservation of the
    shrimp cysts. See 
    id. at 72073
    (remarking in regard to the unoccupied designation of
    Subunit 5c that the land has “[u]nique soils and habitat type; maintains current
    geographical, elevational, and ecological distribution; [is a] disjunct habitat; [and]
    protects existing vernal pool composition”). The agency’s manifest failure to consider,
    much less determine, whether protection of all 56 acres was necessary for conservation
    of the endangered species that is itself located in the one-acre stock pond cannot be
    squared with the plain language of section 1532(5)(A))(ii) of Title 16 of the United
    States Code, which requires the agency to do exactly that in order to make an
    unoccupied critical habitat designation.
    Notably, the FWS does not deny that its “unoccupied critical habitat” designation
    relied on the same methodology the agency had used to determine that Section 5(c)
    qualifies as occupied critical habitat—the agency “focus[ed] . . . on the PCEs. . . . [and]
    looked at where those elements were present surrounding stock the pond[,] [a]nd that’s
    how they drew it.” (Hr’g Tr. at 47:7–16.) See also 77 Fed. Reg. 72082–83 (explaining
    that the agency removed some areas from the scope of the area designated as “essential
    to the conservation of Riverside fairy shrimp” in earlier rules because “they no longer
    contain the physical or biological features or PCEs that are essential to the conservation
    35
    of Riverside fairy shrimp”); 
    id. at 72092
    (discussing the features of Subunit 5c in
    particular and concluding, on that basis, that this geographical area is “essential for the
    conservation of Riverside fairy shrimp”). But the language of the relevant statute does
    not permit reliance on the mere presence of pertinent biological features (PCEs) to
    determine that an area qualifies as unoccupied critical habitat; instead, Congress has
    quite clearly decided that the touchstone of unoccupied critical habitat (in contrast to
    occupied critical habitat) is whether the area itself is “essential” to the conservation of
    the species. 16 U.S.C. § 1532(5)(A)(ii); see also Cape Hatteras Access Pres. 
    All., 344 F. Supp. 2d at 119
    (holding that, when designating unoccupied critical habitat, “it is not
    enough that the area’s features be essential to conservation, the area itself must be
    essential”).
    Indeed, to make the unoccupied critical habitat designation based simply and
    solely on a finding that the land at issue “contained necessary primary constituent
    elements” (as the FWS has done here) “would be to nullify the distinction between
    occupied and unoccupied land, a distinction Congress expressly included within the
    ESA.” Home Builders Ass’n of N. Cal. v. U.S. Fish & Wildlife Serv., 
    268 F. Supp. 2d 1197
    , 1221 (E.D. Cal. 2003), abrogated in part on other grounds by Home Builders
    Ass’n of N. Cal. v. U.S. Fish & Wildlife Serv., 
    616 F.3d 983
    (9th Cir. 2010); see also
    Bear Valley Mut. Water Co. v. Jewell, 
    790 F.3d 977
    , 994 (9th Cir. 2015) (upholding the
    FWS’s designation of unoccupied critical habitat where PCEs were implicated, because
    the FWS had “not designate[d] [the subunit at issue] as essential only because it
    contains PCEs” but had also provided the sources for certain PCEs (emphasis added)).
    Thus, this Court discerns a clear conflict between what Congress has prescribed and
    36
    what the FWS has done to implement its statutory prescriptions in this case. See 5
    U.S.C. § 706(2)(A) (requiring a court to “hold unlawful and set aside agency action,
    findings, and conclusions found to be . . . not in accordance with law”).
    The FWS’s only cogent response to this conclusion is to point out that the ESA
    directs the agency to utilize the “best scientific data available[,]” and that there are no
    existing studies of the extent to which the land around the stock pond on Subunit 5(c)
    actually supports the continued existence of the Riverside fairy shrimp species that
    occupy the one-acre vernal pool. (Defs.’ 2d Suppl. Br. at 16–17.) Of course, this
    statutory language says nothing about whether, and to what extent, the agency his
    required to conduct a study prior to making the challenged critical habitat designation.
    At most, the “best scientific data available” language indicates that Congress was aware
    of the limits of scientific knowledge and ability, and thus has authorized the agency to
    use only the best available information when it undertakes to make the necessary
    findings for the purpose of making a critical habitat designation. To read that language
    to authorize the agency to dispense with making the “essential for conservation of the
    species” finding entirely not only renders section 1532(5)(A)(ii) of Title 16 of the
    United States Code meaningless, but also clearly undermines Congress’s intent with
    respect to requiring the agency to make such a finding at all. And the D.C. Circuit has
    already addressed the mistaken contention that an agency has authority to act in the
    absence of data regarding the scope of the watershed: “the absence of a requirement for
    the Service to collect more data on its own is not the same as an authorization to act
    without data to support its conclusions, even acknowledging the deference due to
    agency expertise.” Otay Mesa 
    Prop., 646 F.3d at 918
    . This means that the FWS can
    37
    take no comfort in the fact that it has not yet utilized its expertise to do the kinds of
    scientific analysis that are needed to make a proper unoccupied critical habitat
    designation; given the text of the statute, the fact that studies do not currently exist
    cannot possibly mean that such analysis need not be done. That is, if the ESA’s
    requirement that the unoccupied critical habitat designation be extended only to those
    geographical areas that are “essential for conservation of the species” means anything,
    then the agency that implements the ESA has to do what it takes to make the requisite
    finding before it designates an area as unoccupied critical habitat pursuant to that
    statute.
    The bottom line is this: there is no dispute that the scope of the area of
    unoccupied habitat in the instant case was determined based on the existence and
    location of the PCEs on Subunit 5(c), and not on any assessment of the extent of land
    area that is actually essential to support the Riverside fairy shrimp, which is what the
    ESA requires. Thus, the FWS’s conclusion that 56 acres of land around the one-acre
    stock pond qualifies as unoccupied critical habitat turned solely on where PCEs were
    co-located, rather than how much land was necessary to support the needs of the
    Riverside fairy species (see Hr’g Tr. at 41:7–16), when the plain language of the statute
    demands that the FWS undertake to make the latter determination. Such a conflict
    bears the hallmark of arbitrary and capricious agency action under the APA. Cf., e.g.,
    Pharm. Research & Mfrs. of Am. v. U.S. Dep’t of Health & Human Servs., 
    138 F. Supp. 3d
    31, 54 (D.D.C. 2015) (finding that agency had violated the APA in issuing an
    interpretive rule that was “contrary to the plain language of the statute”). What is more,
    in the instant case, the FWS also “relied on factors which Congress has not intended it
    38
    to consider,” and “entirely failed to consider an important aspect of the problem,” State
    Farm Mut. Auto. Ins. 
    Co., 463 U.S. at 43
    —namely, whether and to what extent the land
    that comprises Subunit 5(c) is itself “essential” for the preservation of the stock-pond-
    bound shrimp species.
    It may well be that, in the final (proper) analysis, all of the designated acres are
    determined to be essential for the preservation of this endangered species, see U.S. Fish
    & Wildlife Serv. & Nat’l Marine Fisheries Serv., Endangered Species Consultation
    Handbook (Mar. 1998), at xix (noting that unoccupied critical habitat “may be
    designated for an upstream area maintaining the hydrology of the species’ downstream
    habitat”), and the Court takes no position as to whether a full hydrological analysis
    would be necessary to determine what area surrounding the stock pond is essential, as
    Otay Mesa asserts. “This Court of course ‘may not supply a reasoned basis for the
    agency’s action that the agency itself has not given.’” Otay Mesa 
    Prop., 646 F.3d at 917
    (quoting State Farm Mut. Auto. Ins. 
    Co., 463 U.S. at 43
    ). And here, the agency
    has failed to articulate any rational reason for its finding that Subunit 5(c) is an
    unoccupied area that is essential to the conservation of the Riverside fairy shrimp
    species; therefore, the challenged critical habitat designation violates the ESA and
    APA.
    C.     This Court Will Vacate The FWS’s Designation Of Otay Mesa’s
    Property As Critical Habitat For The Riverside Fairy Shrimp
    Finally, having decided that the FWS erred in delineating the critical habitat for
    the Riverside fairy shrimp, the normal course of action would be for this Court to
    vacate the FWS’s designation and remand the matter to the agency. See 5 U.S.C.
    § 706(2)(A) (directing a reviewing court to “hold unlawful and set aside agency action,
    39
    findings, and conclusions [that it finds to be] arbitrary, capricious, an abuse of
    discretion, or otherwise not in accordance with law”); Advocates for Highway & Auto
    Safety v. Fed. Motor Carrier Safety Admin., 
    429 F.3d 1136
    , 1151 (D.C. Cir. 2005)).
    However, the Court has some discretion on this front; indeed, “[a]n inadequately
    supported rule . . . need not necessarily be vacated.” Allied-Signal, Inc. v. U.S. Nuclear
    Regulatory Comm’n, 
    988 F.2d 146
    , 150–51 (D.C. Cir. 1993); see 5 U.S.C. § 702
    (providing that “[n]othing [in the APA’s judicial review provisions] affects . . . the
    power or duty of the court to . . . deny relief on any . . . appropriate legal or equitable
    ground”). (See also Defs.’ MSJ Mem. at 54 (noting this Court’s discretion and
    requesting leave to submit “additional briefing regarding the appropriate remedy if it
    rules in Plaintiffs’ favor on any of the issues raised in their claim for relief”).
    In determining whether to allow the challenged critical habitat designation to
    stand pending agency action on remand, this Court must assess “‘the seriousness of the
    order’s deficiencies (and thus the extent of doubt whether the agency chose correctly)
    and the disruptive consequences of an interim change that may itself be changed.’”
    
    Allied-Signal, 988 F.2d at 150
    –51 (quoting Int’l Union, United Mineworkers of Am. v.
    Fed. Mine Safety & Health Admin., 
    920 F.2d 960
    , 967 (D.C. Cir. 1990)). Courts
    regularly decline to exercise this discretion where an agency has committed substantive
    errors, as opposed to procedural ones. See, e.g., Bldg. Indus. Legal Def. Found. v.
    Norton, 
    231 F. Supp. 2d 100
    , 105 (D.D.C. 2002) (holding the FWS’s choice of
    methodology in that case “constitute[d] serious substantive errors, not mere procedural
    flaws, and hence warrant[ed] vacatur”); Nat’l Ass’n of Homebuilders v. Norton, 00-cv-
    903, 
    2001 WL 1876349
    , at *3 (D. Ariz. Sept. 21, 2001) (vacating rule where the FWS’s
    40
    “failure to comply with the statutory requirements [for] critical habitat designation is
    more than a minor procedural error”); Endangered Species Comm. of the Bldg. Indus.
    Ass’n of S. Cal. v. Babbitt, 
    852 F. Supp. 32
    , 41–43 (D.D.C. 1994) (declining to vacate
    critical habitat designation where the agency’s error was procedural rather than
    substantive).
    Under the circumstances presented here, the agency’s missteps pertaining to the
    designation of critical habitat weighs in favor of vacatur. As this Court has explained
    in detail, the designation of Otay Mesa’s property as critical habitat suffers from
    substantive defects stemming from the FWS’s failure to delineate the area that the
    species occupies properly, and that failure renders the occupied critical habitat
    designation unsustainable. (See Part 
    III.A, supra
    .) In addition, the agency acted
    contrary to the statute and in an arbitrary and capricious fashion when it looked solely
    to the presence of PCEs to determine what part of the area surrounding the stock pond
    qualifies as unoccupied critical habitat and essentially ignored the statutory requirement
    that it actually undertake an assessment of whether and to what extent the surrounding
    area is “essential” to the conservation of the Riverside fairy shrimp species. (See Part
    
    III.B, supra
    .)
    There is also no evidence that vacatur of the critical habitat designation at issue
    here will necessarily be disruptive of, or threaten, the species. Cf. Home Builders
    Ass’ns of N. Cal. v. Norton, 
    293 F. Supp. 2d 1
    , 4–5 (D.D.C. 2002). As has been
    repeatedly explained, the Riverside fairy shrimp is listed as an endangered species and
    the record demonstrates that that species currently occupies only the one-acre stock
    pond. The listing alone provides substantial protection for the species, and vacatur of
    41
    the erroneous critical habitat rule “will in no way disturb the considerable protections,
    both civil and criminal, afforded to the [species] as a listed species under the ESA.”
    Id.; see also Pub. Emps. for Envtl. Responsibility v. U.S. Fish & Wildlife Serv., 189 F.
    Supp. 3d 1, 5 (D.D.C. 2016) (holding that, when determining whether to vacate agency
    action, a court can consider “[t]he availability of these alternative measures” that will
    mitigate potential environmental harms that could otherwise result from vacatur),
    appeal dismissed, No. 16-5224, 
    2016 WL 6915561
    , (D.C. Cir. Oct. 31, 2016). Indeed,
    in 2002, during prior proceedings involving this very species and critical habitat
    determination, the FWS asked that the designation be vacated and the matter remanded
    to the FWS to allow the agency to redo the economic analysis for the critical habitat,
    and the agency specifically represented that “vacatur of the critical habitat designations
    during the remand period will not compromise the conservation needs of the two
    species” in light of the “host of regulatory protections beyond those found in Section 7”
    that would protect the species “even absent critical habitat designation.” Bldg. Indus.
    Legal Def. 
    Found., 231 F. Supp. 2d at 106
    ; see also Otay Mesa 
    Prop., 646 F.3d at 918
    –
    19 (vacating designation of Otay Mesa’s land as critical habitat for the San Diego fairy
    shrimp).
    Thus, in light of (1) the clear substantive flaws in the methodology that the FWS
    used to designate 50-plus acres of Otay Mesa’s property as a critical habitat for the
    Riverside fairy shrimp, and (2) “the overlapping regulatory structures that protect the
    species and their unique vernal pool and riparian habitats,” Bldg. Indus. Legal Def.
    
    Found., 231 F. Supp. 2d at 107
    , as well as the absence of any evidence of potential
    significant disruptive consequences arising from vacatur under the circumstances
    42
    presented here, this Court will vacate the designation of Subunit 5(c) as a critical
    habitat for the Riverside fairy shrimp and remand this matter to the FWS for further
    proceedings consistent with this Opinion.
    IV.    CONCLUSION
    The FWS’s designation of Otay Mesa’s property as either occupied or
    unoccupied critical habitat for the Riverside fairy shrimp was arbitrary and capricious
    and in violation of governing law for the reasons explained above. Accordingly, as
    stated in the accompanying order, Otay Mesa’s renewed motion for summary judgment
    will be GRANTED, and Defendants’ renewed motion for summary judgment will be
    DENIED. Moreover, the existing rule designating Otay Mesa’s property as critical
    habitat for the Riverside fairy shrimp will be VACATED, and this matter will be
    REMANDED to the FWS for further rulemaking consistent with this ruling.
    DATE: September 25, 2018                  Ketanji Brown Jackson
    KETANJI BROWN JACKSON
    United States District Judge
    43
    

Document Info

Docket Number: Civil Action No. 2013-0240

Judges: Judge Ketanji Brown Jackson

Filed Date: 9/25/2018

Precedential Status: Precedential

Modified Date: 9/25/2018

Authorities (32)

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OTAY MESA PROPERTY, LP v. US Dept. of Interior , 646 F.3d 914 ( 2011 )

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Building Industry Legal Defense Foundation v. Norton , 231 F. Supp. 2d 100 ( 2002 )

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