UNITED STATES DISTRICT COURT FOR THE DISTRICT OF COLUMBIA

STANDING ROCK SIOUX TRIBE,

Plaintiff, v. Civil Action No. 24-2905 (JEB) U.S. ARMY CORPS OF ENGINEERS, et al.,

Defendants,

STATES OF NORTH DAKOTA, et al.,

Defendant-Intervenors,

and

DAKOTA ACCESS, LLC,

Defendant-Intervenor.

MEMORANDUM OPINION

Once more unto the breach, dear friends. Four years ago, in its last major ruling in this

nearly decade-long dispute between the Standing Rock Sioux Tribe and the U.S. Army Corps of

Engineers, the Court denied the Tribe’s request for a permanent injunction to halt operation of

the Dakota Access Pipeline, a 1,200-mile oil conduit operated by Dakota Access, LLC.

Although Plaintiff had previously scored a “hard-earned victory” by convincing this Court and

the D.C. Circuit that Dakota Access’s easement to cross federal land should be vacated, it

eventually “ran out of luck” when it could not show that it would suffer irreparable harm if the

pipeline were allowed to operate pending a remand to the agency. See Standing Rock Sioux

Tribe v. U.S. Army Corps of Eng’rs (Standing Rock X),

, 49–50 (D.D.C.

1 2021). So, for the last four years, black gold has continued to flow from the Bakken oil fields of

North Dakota to southern Illinois, traversing federal land without a Corps-issued easement, while

the Corps — unwilling to enforce its property rights — has stayed its hand.

The ostensible justification for this state of suspended animation is that the Government

has been preparing a Court-ordered environmental-impact statement, which, depending on its

conclusions, could allow the Corps to grant Dakota Access a new easement for the pipeline.

While that process has dragged on, the Corps has continued to chart a “course . . . of inaction,”

choosing neither to “affirmatively authorize[]” the pipeline’s operation nor to “exercis[e] its

enforcement powers” to shut it down. Standing Rock X, 540 F. Supp. 3d at 50. That outcome

has generated “understandable frustration” for the Tribe. Id. In closing the previous case,

however, the Court noted that Plaintiff could always “file a separate action” to challenge the EIS

once it was completed, Standing Rock Sioux Tribe v. U.S. Army Corps of Eng’rs, No. 16-1534,

Minute Order of June 22, 2021 (D.D.C.), which would soon bring the dispute back to the Court’s

docket.

But not, perhaps, quite this soon. Although the Corps has not yet finished the EIS

required by the previous Order or issued a fresh easement, the Tribe is already knocking on the

courthouse doors. Alleging violations of a host of federal statutes, it now seeks to use the

Administrative Procedure Act to either halt the operation of the pipeline or force the Corps to

require Dakota Access to obtain an easement to operate. Dakota Access and a coalition of states

led by North Dakota have intervened as Defendants, and they along with the Corps have filed

Motions to Dismiss this latest Complaint. Although the precise nature of the relief Plaintiff

seeks remains unclear, the Court can discern enough to grant those Motions and dismiss this

prematurely filed suit.

2 I. Background

A. Prior Suit

The Court will recount the factual and procedural history leading to the present dispute in

abbreviated fashion, referring “readers hungry for more to its prior writings.” Standing Rock X,

540 F. Supp. 3d at 50; see, e.g., id. at 51–55; Standing Rock Sioux Tribe v. U.S. Army Corps of

Eng’rs (Standing Rock III),

, 114–16 (D.D.C. 2017); Standing Rock Sioux

Tribe v. U.S. Army Corps of Eng’rs (Standing Rock VII),

, 75 (D.D.C. 2020),

aff’d in part and rev’d in part, Standing Rock Sioux Tribe v. U.S. Army Corps of Eng’rs

(Standing Rock IX),

(D.C. Cir. 2021).

The Dakota Access Pipeline — which transports more than half a million gallons of

crude oil from North Dakota to Illinois every day — must occasionally cross federally regulated

waters. Standing Rock III,

. One such junction is at Lake Oahe, an

artificial reservoir on the Missouri River that spans North and South Dakota and borders several

American Indian reservations, including Plaintiff’s.

As the Court has previously

emphasized, the reservoir “holds special significance” for these tribes,

who rely on it for

“drinking, agriculture, industry, and sacred religious and medicinal practices.” Standing Rock

IX,

.

They accordingly have launched numerous legal challenges to enjoin the Corps from

permitting Dakota Access to construct or operate the segment of the pipeline running underneath

the lake. Early attempts brought under the National Historic Preservation Act and the Religious

Freedom Restoration Act, however, were unsuccessful in obtaining that relief. See Standing

Rock Sioux Tribe v. U.S. Army Corps of Eng’rs (Standing Rock II),

(D.D.C. 2017); Standing Rock Sioux Tribe v. U.S. Army Corps of Eng’rs (Standing Rock I),

, 37 (D.D.C. 2016). The Corps thus eventually granted the required easement, and

3 the pipeline became fully operational on June 1, 2017. Standing Rock III,

.

“Undeterred” by their early defeats, the tribes soon “switched focus” and sought relief

“under the National Environmental Policy Act, arguing that the Corps was required to prepare an

Environmental Impact Statement” before granting the permit to cross federal land. Standing

Rock VII, 471 F. Supp. 3d at 77 (cleaned up). That salvo met with better success. Over the

course of three years, the Court twice remanded the issue to the Corps, eventually holding that

the agency was required to complete an EIS before granting an easement. See Standing Rock III,

; Standing Rock Sioux Tribe v. U.S. Army Corps of Eng’rs (Standing

Rock VI),

, 8 (D.D.C. 2020). While the case was back with the Corps, the

Court also vacated the existing easement — which had the “legal effect” of “render[ing] the

pipeline an ‘encroachment’ on federal land” — and ordered Dakota Access to empty the pipeline

of oil within 30 days. Standing Rock X, 540 F. Supp. 3d at 52; see Standing Rock VII, 471 F.

Supp. 3d at 75.

The long-sought shutdown, however, never came to pass. A motions panel of the D.C.

Circuit stayed that aspect of the Order while Defendants appealed, holding that this Court had

not made the necessary findings to permanently enjoin operation of the pipeline. See Standing

Rock Sioux Tribe v. U.S. Army Corps of Eng'rs (Standing Rock VIII),

, at *1

(D.C. Cir. Aug. 5, 2020). But the panel rejected Defendants’ bid to stay the rest of the Order,

thus maintaining the legal status of the pipeline as an encroachment on federal property and

requiring the Corps to begin preparing the EIS while the case was on appeal.

The merits panel followed suit several months later. It “affirmed this Court’s top-line

conclusions” that the easement must be vacated while the Corps completed an EIS, but it

4 “reversed this Court’s order shutting down the pipeline.” Standing Rock X, 540 F. Supp. 3d at

53; see Standing Rock IX,

, 1053–54. Noting the unique posture of the case —

the only one it had encountered “in which the sole issue before the court was whether an

easement already in use (rather than a construction or operating permit) must be vacated on

NEPA grounds” — the panel nonetheless held that this Court “could not order the pipeline to be

shut down without . . . making the findings necessary for injunctive relief” under the traditional

four-factor test. Standing Rock IX,

. The panel also prodded the Corps to

“decide promptly” how it would enforce its property rights in light of the vacated easement.

Meanwhile, briefing on the permanent injunction continued apace in this Court after the

motions panel had issued its stay. See Standing Rock X, 540 F. Supp. 3d at 54. The Corps had

been studiously noncommittal throughout about how it would respond to the pipeline’s

encroachment, even as it resisted injunctive relief that would halt operations. Id. at 53–54.

Instead, it informed the Court in a status conference that it was in a “continuous process of

evaluating the status of the encroachment and what steps are best to take.” Id. at 54 (quotation

marks omitted). This Court eventually denied the tribes’ request for injunctive relief, holding

that, in light of the vanishingly low likelihood of an oil spill, they had not shown that they would

suffer irreparable harm were the pipeline permitted to operate. Id. at 57–64. It acknowledged,

however, the regrettable recalcitrance of the Corps, which had opted throughout to ignore

repeated instructions from this Court and our Circuit to decide “in the first instance” how it

would “enforce its property rights vis-à-vis the pipeline’s encroach[ment] on federal land.” Id. at

64 (quotation marks omitted). Although that choice was a “political decision outside this Court’s

area of inquiry,” the Court concluded, it was one that the Corps would have to “own[].” Id. at

65.

5 B. Current Suit

That was where things stood approximately four years ago, and remarkably little has

changed since. According to Plaintiff, Dakota Access continues to operate its pipeline “without

the required easement to cross federal land” and “absent a lawful environmental impact

analysis,” among other alleged deficiencies. See ECF No. 1 (Compl.), ¶ 2. Defendants do not

dispute this. See ECF No. 31 (U.S. MTD) at 9–10; see also Sparrow v. United Airlines,

(D.C. Cir. 2000) (on motion to dismiss, court takes facts as pled in complaint to

be true). They assert, however, that the Corps has been diligently working on the EIS and, as

required by law, provided a draft to Plaintiff and other tribes for comment before publishing

notice in the Federal Register in September 2023. See U.S. MTD at 9; see also ECF No. 31-1

(Draft EIS);

.73–.74 (draft EIS must be made available to various federal

agencies and interested parties for public comment). Plaintiff, for its part, acknowledges that

Dakota Access has sought a new easement. See Compl., ¶ 41. No party has provided a timeline

for either publishing the final EIS or granting the new easement.

Plaintiff filed this suit in October of last year, naming the Corps and various federal

officials as Defendants. Its Complaint alleges five counts, all of which cite

(1) —

the provision of the APA permitting a reviewing court to “compel agency action unlawfully

withheld or unreasonably delayed.” As best the Court can tell, the “action” that the Tribe alleges

has been unlawfully withheld or unreasonably delayed appears to be the Corps’ requiring Dakota

Access to obtain an easement before operating its pipeline on federal land, in violation of the

requirements of the Mineral Leasing Act (Count I), NEPA (Count II), the Government

Acquisition and Streamlining Act of 1994 (Count III), the Clean Water Act (Count IV), and the

NHPA (Count V). See Compl., ¶¶ 95–152.

6 North Dakota quickly sought leave to intervene as a Defendant, which the Court granted.

See ECF No. 10 (N.D. Mot. to Intervene); Minute Order of Dec. 3, 2024 (granting intervention).

The Flickertail State was joined shortly thereafter by a coalition of thirteen others, led by Iowa,

see ECF No. 19 (States’ Mot. to Intervene); Minute Order of Dec. 17, 2024 (granting

intervention), and by Dakota Access itself, see ECF No. 23 (Dakota Access Mot. to Intervene);

Minute Order of Dec. 19, 2024 (granting intervention). The Defendant-Intervenor States and

Dakota Access have filed separate Motions to Dismiss alongside the Government’s. See ECF

Nos. 32 (Dakota Access MTD), 33-1 (States MTD). Those Motions are now ripe.

II. Legal Standard

In connection with Plaintiff’s APA claim, the Motions to Dismiss invoke Federal Rule of

Civil Procedure 12(b)(6). That Rule provides for the dismissal of an action where a complaint

fails to “state a claim upon which relief can be granted.” Although “detailed factual allegations”

are not necessary to withstand a Rule 12(b)(6) motion, Bell Atl. Corp. v. Twombly,

(2007), “a complaint must contain sufficient factual matter, accepted as true, to state a

claim to relief that is plausible on its face.” Ashcroft v. Iqbal,

(2009) (internal

quotations marks and citation omitted). In weighing a motion to dismiss, a court “may consider

only the facts alleged in the complaint, any documents either attached to or incorporated in the

complaint[,] and matters of which [the court] may take judicial notice.” EEOC v. St. Francis

Xavier Parochial School,

(D.C. Cir. 1997). The court “must treat the

complaint’s factual allegations as true and must grant [the] plaintiff ‘the benefit of all inferences

that can be derived from the facts alleged.’” Sparrow,

(quoting Schuler v.

United States,

(D.C. Cir. 1979)) (internal citations omitted). It need not

accept as true, however, “a legal conclusion couched as a factual allegation” or an inference

7 unsupported by the facts set forth in the complaint. Trudeau v. FTC,

(D.C.

Cir. 2006) (cleaned up).

III. Analysis

The Court starts by demarcating the boundaries of the legal dispute, which have not been

laid with particular care. Despite its repeated citations to

(1), for instance,

Plaintiff peppers its Complaint with language from § 706(2)(A) — which applies only to final

agency action, rather than to action unlawfully withheld or delayed. See, e.g., Compl., ¶¶ 104

(allowing Dakota Access to operate pipeline “without an easement is arbitrary, capricious, an

abuse of discretion and contrary to law”), 110 (same), 117 (same), 129 (similar), 151 (similar).

The Tribe also asks the Court at several points to bar Defendants from awarding to Dakota

Access the very easement it elsewhere seeks to compel them to require that company to obtain.

Compare, e.g., id., ¶¶ 117 (asserting that Dakota Access is “ineligible for an easement”), and 148

(asserting that “no federal permits or assistance” should “issue” to Dakota Access’s parent

company), with ECF No. 46 (Opp.) at 3 (arguing the Corps “must . . . require the pipeline

operator to ‘obtain an easement’”). And it alleges violations of an alphabet soup of other statutes

in connection with these APA claims, without making clear in the Complaint whether these

statutes are cited as independent causes of action. See Compl., ¶¶ 95–152.

Such confusing and contradictory allegations notwithstanding, Plaintiff in its Opposition

now maintains that it seeks review only under § 706(1), asserting that “[f]ederal defendants have

a mandatory duty to require Energy Transfer LP [the parent company] to obtain an easement.”

Opp. at 2. This late-breaking attempt at clarity still leaves much unanswered. Compare, e.g., id.

(claiming that Complaint does not “seek the permanent shutdown or denial of an easement for

the operation,” except for Count V), with id. at 9 (“Plaintiff asks the Court for relief from the

operation of a hazardous liquid pipeline across a flood control project without an easement.”), 8 and Compl. at 31 (asking for permanent injunction stopping operations). The Court will

nonetheless follow the lead of all parties and accept the Tribe’s concession that its § 706(1)

failure-to-act claim is the sole one for decision.

So narrowed, this dispute can be quickly dispatched. Plaintiff’s Complaint and

Opposition raise three possibilities for the relief such a suit could seek: (1) shutting down the

pipeline; (2) forcing the Corps to eject Dakota Access from its land; or (3) mandating that

Defendants “require” an easement. The sine qua non of a § 706(1) suit, however, is to “identify

a legally required, discrete act that the [agency] has failed to perform.” Montanans for Multiple

Use v. Barbouletos,

(D.C. Cir. 2009). The Tribe clearly has not met this bar.

Even if it had, moreover, all of the above options reduce to a renewed request for the type of

injunctive relief the Court already denied in Standing Rock X, and they are thus precluded by

that case. The Court will address each of these issues in turn.

A. Nondiscretionary Duty

Like a writ of mandamus — its forebear —

(1) may be used only to

enforce statutory directives amounting to “specific, unequivocal command[s].” ICC v. New

York, N.H. & H.R. Co.,

(1932). Its function is therefore limited to compelling

“ministerial” acts “about which [an official has] no discretion whatever.” Norton v. S. Utah

Wilderness All.,

(2004) (quotation marks omitted). While § 706(1) does not

pose a jurisdictional bar, see Asim v. Blinken,

, at *3 (D.D.C. July 8, 2024),

the Tribe’s suit against Defendants states a claim for relief “only [if it] asserts that [the Corps]

failed to take a discrete agency action that it is required to take.” Norton,

.

Unfortunately for Plaintiff, none of the available options for relief is the type of

“ministerial” act for which § 706(1) is available. As for shutting off the flow of oil or ejecting

9 the pipeline — a request the Tribe asserts is relevant only to Count V, see Opp. at 2 — Plaintiff

relies entirely on a section of the NHPA barring federal agencies from granting a “permit,

license, or other assistance” to applicants who have “intentionally significantly adversely

affected a historic property.”

; see Compl., ¶ 133. But that provision on its

own terms applies only to granting permits or other types of “assistance.” It says nothing about

shutting down projects operating without such permits. At best, then, it would become relevant

to this suit only once the Corps actually granted an easement to Dakota Access — something the

Complaint acknowledges has not yet occurred. See Compl., ¶ 41. The NHPA, moreover, allows

federal agencies to carve out exceptions to this prohibition if they determine “that circumstances

justify granting the assistance despite the adverse effect created . . . by the applicant.”

. That grant of discretionary exception-making is the polar opposite of the

“unequivocal command” required to compel agency action under § 706(1).

Apart from the NHPA, Plaintiff identifies no other sources of law compelling the Corps

to shut down the pipeline. In the prior lawsuit, Defendants pointed out to the Court that no legal

authority requires them “to take any particular action to cure an encroachment within a specified

time period, nor is there any requirement to ultimately cure the encroachment at all.” Standing

Rock Sioux Tribe v. U.S. Army Corps of Eng’rs, No. 16-1534, ECF No. 562 (Status Report) at

4. Over four years later, the Tribe has not improved on this understanding. The best it does is

cite a Corps regulation stating that unauthorized structures on Corps-administered land “are

subject to summary removal.”

; see Opp. at 11. No one disputes, however,

that the pipeline is currently an unauthorized structure that the Corps may, at any moment,

choose to remove. See U.S. MTD at 12–13; Dakota Access MTD at 15–16; States MTD at 2.

The question is whether Defendants are legally obligated to do so. As to that issue, the Tribe

10 comes up empty. “Merely because the statute indicates situations with respect to which the

agency may take enforcement actions does not mean that the agency must act in all such

situations.” NTCH, Inc. v. FCC,

(D.C. Cir. 2016).

That leaves option three: Plaintiff’s repeated contention — based on Count I — that the

Corps must “require” Dakota Access (or its parent company) “to obtain an easement.” Opp. at 2;

see also id. at 3 (Corps must “require the pipeline operator to obtain an easement”) (quotation

marks omitted), 8 (“easement requirement” is “mandatory”). As the Intervenor States observe,

however, “[T]his Court has already held” that the company must seek a new easement, “and no

parties are disputing the point.” ECF No. 47 (States Reply) at 1 (citations omitted). If Plaintiff

means simply to re-argue that holding, then by its own admission the point is now moot: Dakota

Access has “appli[ed] for” that easement, and it is “currently under consideration” by the Corps.

See Compl., ¶ 41; see Conservation Force, Inc v. Jewell,

(D.C. Cir. 2013)

(case is moot if “a party has already obtained all the relief that [it has] sought”) (quotation marks

omitted).

Perhaps recognizing that barrier, the Tribe at times appears to argue a related point —

namely, that the Corps is required to issue an easement for a pipeline to traverse Lake Oahe.

See, e.g., Opp. at 4 (the “discreet [sic] mandatory dut[y]” is “issuance of an easement for the

operation of the pipeline”) (emphasis added), 5 (rejecting that the Corps “possesses the discretion

to allow a pipeline to operate without an easement”), 9 (claiming that Plaintiff seeks “relief from

the operation of a hazardous liquid pipeline across a flood control project without an easement,”

not to “shut down” or “remov[e]” the pipeline) (emphasis added). The Court can only assume

that Plaintiff presses this claim in order to expedite its opportunity to challenge such easement

once approved. Any relief, however, that would force Defendants to grant an easement now

11 would run headlong into the Court’s Order requiring that the Corps first complete the EIS. See

Standing Rock VI, 440 F. Supp. 3d at 26.

Besides, Plaintiff also identifies no legal authority for its position. The MLA (on which it

pins its hopes, see Opp. at 5–9) provides that “[r]ights-of-way through any Federal lands may be

granted by the Secretary of the Interior or appropriate agency head for pipeline purposes for the

transportation of oil.”

(a) (emphasis added); see Compl., ¶ 97. “May” is a

quintessentially discretionary term. See Jama v. ICE,

(2005). As our Circuit

thus long ago observed, “[T]he [MLA] reposes discretion as to the issuance of rights-of-way in

the Secretary of the Interior” or other agency head. Chapman v. El Paso Nat. Gas Co.,

(D.C. Cir. 1953). The Tribe rejoins that the use of “may” indicates simply that multiple

agency heads have authority to grant easements, see Opp. at 6, but the Court is not persuaded.

Under that reading, “may” does no independent work; the statute could just as easily have said

that rights-of-way “shall” “be granted by the Secretary of the Interior or appropriate agency

head.” That is not what is written. Cf. Duncan v. Walker,

(2001) (it is court’s

job “to give effect, if possible, to every clause and word of a statute”). The use of “may” instead

appears designed to leave to the appropriate agency head’s discretion whether to grant an

easement in the first instance. See Kingdomware Technologies, Inc. v. United States,

(2016) (“Unlike the word ‘may,’ which implies discretion, the word ‘shall’ usually

connotes a requirement.”). That interpretation is only underscored by the statute’s use of “shall”

to specify various other requirements, such as that the “[t]he Secretary or agency head shall

impose requirements for the operation of the pipeline and related facilities in a manner that will

protect” public and worker safety. See

(g); Anglers Conservation Network v.

12 Pritzker,

(D.C. Cir. 2016) (“[W]hen a statutory provision uses both ‘shall’ and

‘may,’ it is a fair inference that the writers intended the ordinary distinction” between the two.).

Because most of the subsequent counts are “tier[ed] off” Count I, see Opp. at 12, 13, they

topple with it. Counts II and IV appear to ask for the same relief, adding only that the “required”

easement must comply with NEPA and the CWA. See Compl., ¶¶ 107–10, 123–26; Opp. at 10–

11. They therefore also fail to state a claim under § 706(1) for all the reasons previously

explained. Count III, meanwhile, alleges that Dakota Access is “ineligible for an easement for

the indefinite future” because of Energy Transfer’s debarment proceedings, see Compl., ¶ 116,

but also claiming that the Corps must “require a lawful easement to be in place” under

§ 706(1). Id., ¶ 118. (The Tribe leaves to the reader’s imagination who should seek this required

easement, if not Dakota Access.) However construed, that count likewise identifies no discrete,

mandatory action that the Corps is required to take. The same goes for Count V, insofar as it

seeks to compel similar agency action. See Compl., ¶ 152 (identifying only Corps’ “failure to

act in compliance with mandatory provisions of the NHPA”).

To the extent that any of Plaintiff’s allegations seek to bar Dakota Access or its parent

company from obtaining a potential new easement, see, e.g., id., ¶¶ 114 (“The debarment renders

Energy Transfer LP ineligible for the requested easement . . . .”), 148 (“[D]efendants have a

mandatory duty under NHPA section 110(k) to ensure that no federal permits or assistance will

issue to Energy Transfer LP . . . .”), or otherwise raise issues with the yet-to-be completed EIS or

yet-to-be-issued permit, see, e.g., id., ¶¶ 124–26 (alleging that Defendants have not produced a

proper Facility Response Plan under the CWA), they are neither actionable under § 706(1) nor fit

for consideration at this time. See Fourth Branch Assocs. (Mechanicville) v. FERC,

(D.C. Cir. 2001) (“A party may only petition for judicial review of a final agency

13 action.”). If the Tribe wishes to address such issues, it must wait until the Corps has issued the

allegedly unlawful permit — an action this Court in the meantime has no power to compel.

B. Issue Preclusion

The issues with Plaintiff’s case do not end there. Even were it to clear § 706(1)’s bar, the

Tribe would still be precluded from seeking injunctive relief because Standing Rock X already

considered and denied such request. See U.S. MTD at 17–22; ECF No. 48 (U.S. Reply) at 12–

14. The doctrine of issue preclusion is meant to conserve judicial resources by “prevent[ing] a

party from relitigating an issue that has already been decided.” Jackson v. Off. of the Mayor of

D.C.,

(D.C. Cir. 2018). Under the doctrine, “an issue of fact or law that

was actually litigated and necessarily decided is conclusive in a subsequent action.” McAlister

v. Potter,

(D.D.C. 2012) (citing Allen v. McCurry,

(1980)). It requires that “(1) ‘the same issue now being raised must have been contested by the

parties and submitted for judicial determination in the prior case;’ (2) ‘the issue must have been

actually and necessarily determined by a court of competent jurisdiction in that prior case;’ and

(3) ‘preclusion in the second case must not work a basic unfairness to the party bound by the first

determination.’” Montgomery v. Internal Revenue Serv.,

(D.C. Cir. 2022)

(quoting Martin v. Dep’t of Just.,

(D.C. Cir. 2007)).

To be sure, Plaintiff here does not ask the Court to re-examine Standing Rock X, and, as

previously indicated, it at points disclaims asking for shutting down or ejecting the pipeline. See

Opp. at 2, 9. That would appear to limit its request only to “requir[ing]” Dakota Access “to

obtain an easement.” Opp. at 2. As explained, however, this Court has already held as much,

and no party disputes that such relief has already been provided. The Tribe does not explain,

moreover, how its various allegations — all of which boil down to attacking “the ongoing

14 operation of [the pipeline] without” an easement, see, e.g., Compl., ¶¶ 105, 111 — can be

resolved without an order shutting down pipeline operations. Indeed, despite its protestations to

the contrary, the Tribe does explicitly ask for stopping the operation of the pipeline, see Compl.

at p. 31; Opp. at 2, and it opposes preclusion primarily because of “new and different facts” that

it argues would support a fresh injunction — not because it disclaims any such request in the first

place. See Opp. at 25–27. The Court is thus at loss to see how Plaintiff’s suit is anything other

than an attempted re-do of Standing Rock X.

In that phase of the case, this Court refused to issue a permanent injunction shutting down

the pipeline because the plaintiffs had not made the requisite showing of irreparable harm. See

540 F. Supp. 3d at 64. The Court rested that conclusion on its finding that the likelihood of an

oil spill was exceedingly low: data in the record reflected “but a single, 1.7-barrel leak between

2010 and 2020 on any crude-oil pipeline installed using horizontal directional drilling

technology, the very method in place” at the Lake Oahe crossing. Id. at 57. Even if a leak did

occur, moreover, the possibility that any oil would reach Lake Oahe — 90 feet of “low-

permeability deposits, sediments, and clay” above the pipeline — was rarer still. Id. at 58. In

light of those remote possibilities, and considering the tribes’ inability to point to any legal

reason to shut down the pipeline, the Court concluded that it could not offer such relief. Id. at

64–66.

Plaintiff offers nothing to disturb those prior determinations. It insists that the current

case presents “disparate legal claims,” Opp. at 25, but as those claims also seek an injunction

shutting down (or digging up) the pipeline, they cannot circumvent the preclusive effect of the

prior case. See Yamaha Corp. v. United States,

, 257–58 (D.C. Cir. 1992) (“If a

new legal theory or factual assertion put forward in the second action is related to the subject-

15 matter and relevant to the issues that were litigated and adjudicated previously, so that it could

have been raised, the judgment is conclusive on it despite the fact that it was not in fact expressly

pleaded or otherwise urged.”) (quotation marks omitted). The Tribe also points to “new and

different facts” that purportedly change the injunction calculus, such as the “progress” that the

Corps has made in “conducting a new NEPA evaluation,” the “inadequacies of the facility

response plans and spill remediation measures vis-à-vis the operational water levels of Lake

Oahe,” and “previously undisclosed evidence that the initial drilling of the pipeline may have

resulted in a substantial release of some 1.4 million gallons of drilling mud in the ecosystem.”

Opp. at 25–26. Plaintiff recites — but does not explain the legal import of — these observations.

For example, it nowhere explains how they change the irreparable-harm considerations or would

otherwise make preclusion here “basic[ally] unfair[].” Montgomery,

. Indeed, its

submissions do not call into question the basis for the Court’s prior decision: the low likelihood

that the pipeline’s ongoing operation would cause irreparable harm to Plaintiff and other

similarly situated communities.

The Court thus concludes that, even if it could succeed on the merits of its APA claim,

the Tribe would be precluded from seeking any injunctive relief here. No matter its frustration

with Defendants’ sluggish pace, it is not yet entitled to a second bite at the apple.

IV. Conclusion

For the foregoing reasons, the Court will grant the Defendants and Intervenor-

Defendants’ Motions to Dismiss.

/s/ James E. Boasberg JAMES E. BOASBERG Chief Judge Date: March 28, 2025

16