This case is the latest installment in a series of federal and state court lawsuits that concern the appellant’s West Chicago Rare Earths Facility. It again raises, in a slightly modified form, the highly contentious issue of whose back yard will be the final resting place of wastes from the facility. In the current suit, Kerr-McGee
*1178
Chemiсal Corporation (“Kerr-McGee”) appeals the district court’s refusal to enjoin a pending state court lawsuit. Kerr-McGee contends that a prior decision of this court,
Brown v. Kerr-McGee Chem. Corp.,
I.
Kerr-McGee and its predecessor companies used the West Chicago facility from the early 1930’s until 1973 to produce various compounds derived from radioactive natural ores. Thеse activities generated large quantities of solid and liquid wastes that emit low levels of radiation. Kerr-McGee stopped processing ores in 1973 but continues to possess and store the wastes at its West Chicago facility under license from the Nuclear Regulatory Commission (the “NRC”). The federal government, through the NRC, and the State of Illinois want to regulate the storage and eventual disposal of these wastes. The clash between the two levels of government has produced a number of proceedings in state and federal court and before the NRC; we provide a brief summary of these proceedings insofаr as they are relevant to the dispute before us.
A July 1977 order of the NRC required Kerr-McGee to seek amendment of the license under which it operates the West Chicago site. Pursuant to this order, Kerr-McGee asked the NRC for permission to undertake onsite encapsulation, which was the company’s prеferred course of disposal of the wastes. This would mean leaving the wastes in their present location but covering and sealing them. In May 1983, the NRC issued its Final Environmental Statement (“FES”), which outlined eight alternative proposals and recommended that the wastes be encapsulated and stored on the site for аn indeterminate time period. The NRC, pursuant to the request of the Illinois Attorney General, authorized the Atomic Safety Licensing Board (the “ASLB”) to hold a hearing on the FES. In October 1983, the licensing board determined, without a hearing, that the FES was facially inadequate. The NRC staff is presently drafting a supplement to the FES. The NRC antiсipated that the supplement might be released in draft form in March 1987; the date of issuance of the final version of the supplement could not be estimated as it is dependent upon the extent and nature of the comments received on the draft supplement. Letter dated January 5, 1987 from NRC to ASLB panel. No hearings can be held before the licensing board until the final supplement is issued.
In addition to the proceedings before the NRC, a number of lawsuits involving the West Chicago facility have been appealed to this court.
See City of West Chicago v. Nuclear Regulatory Comm’n,
The State of Illinois appeared in Brown as amicus curiae in support of the plaintiffs’ position when that case was before us on appeal. The state also initiated its own suit in state court against Kerr-McGee on *1179 April 28, 1980, seeking, inter alia, injunctive relief to require the removal and disposal of the industrial wastes located at the West Chicago facility in a manner consistent with state law. Illinois v. Kerr-McGee Chem. Corp., No. 80 CH 298 (Cir.Ct.). 1 Following this court’s decision in Brown, Kerr-McGee filed a motion for partial summary judgment in the state court actiоn, contending that the state’s request for injunctive relief was preempted by federal law. The state court denied Kerr-McGee’s motion on October 25, 1985. Kerr-McGee then filed this suit in district court, seeking to enjoin Illinois from proceeding with its state court suit. 2 On January 28,1986, the district court denied Kerr-McGee’s motion for a preliminary injunction and granted the state’s motion to dismiss. The court found that the state was not bound by Brown, and the court was therefore prohibited by the Anti-Injunction Act, 28 U.S.C. § 2283 (1982), from enjoining the state court suit. Kerr-McGee Chem. Corp. v. Hartigan, No. 85 C 10068, mem. op. and order (N.D.Ill. Jan. 28, 1986) (“mem. op.”) [Available on WESTLAW, DCT database]. This appeal followed.
II.
Kerr-McGee contends on aрpeal that the district court erred by failing to enjoin the state court proceeding. According to Kerr-McGee, the Anti-Injunction Act, 28 U.S.C. § 2283 (1982), clearly authorizes the district court to issue an injunction under the circumstances of this case. The Anti-Injunction Act provides:
A court of the United States may not grant an injunction to stаy proceedings in a State court except as expressly authorized by Act of Congress, or where necessary in aid of its jurisdiction, or to protect or effectuate its judgments.
28 U.S.C. § 2283 (1982). Kerr-McGee’s position is that the third exception applies in this lawsuit: An injunction staying proceedings in the pending state court suit is necessary to "protect or effectuate” the prior decision of this court in Brown because the state is bound by the earlier judgment, and it is attempting to relitigate in state court the preemption issue decided in Brown. Appellant’s Brief at 9. Kerr-McGee further argues that the district court has no discretion in this matter; if Illinоis is bound by Brown, the court must issue an injunction. “When a federal court judgment concerns matters as to which federal law preempts state law, the Constitution requires that such friction be avoided.” Appellant’s Brief at 10 (citations omitted) (emphasis in original).
Under the Anti-Injunction Act, federal courts are absolutely prohibited from enjoining state court proceedings, unless the injunction falls within one of the three exceptions defined in the Act.
Atlantic Coast Line R. Co. v. Brotherhood of Locomotive Eng’rs,
“[A] pеrson may be bound by a judgment even though not a party if one of the parties to the suit is so closely aligned with his interests as to be his virtual representative.”
Aerojet-General Corp. v. Askew,
Kerr-McGee argues that the state is bound by the earlier decision of this court because: (1) its interests are parallel to those of the private citizens (both allege the same harm and seek the same relief) and were adequately protected by the рlaintiffs’ litigation of that suit, and (2) the state’s interest in litigating the preemption issue was adequately protected by its own participation in that suit as amicus curiae when that case was on appeal to this court. Appellant’s Brief at 12-14.
We conclude that the state is not bound by the prior litigation and thus that enjoining the state court suit is not necessary “to protect or effectuate” our judgment in
Brown.
Generally, “individual litigation ... does not preclude relitigation by the government.” 18 Wright § 4458, at 520 (footnote omitted).
See, e.g., Durfee v. Duke,
The state is also not bound simply by its appearance as an
amicus curiae
in
Brown
when that case was appealed to this court. Although a nonparty may be bound because of the control that it exerts over litigation, the degree of control justifying preclusion of a nonparty “should be enough that the nonparty has the actual measure of control or opportunity to control that might reasonably be expected between two formal coparties.” 18 Wright § 4451, at 430 (footnote omitted). Participation as an
amicus curiae
does not provide the requisite degree of control.
See TRW, Inc. v. Ellipse Corp.,
III.
Even if we found that the state was bound by
Brown
and thus that enjoining the state court suit would serve “to protect or effеctuate” the earlier decision of this court, the Anti-Injunction Act does not
require
a federal court to issue an injunction under these circumstances. That Act only prescribes exceptions to the general prohibition against enjoining state court proceedings. If a case does not fall within one of thе enumerated exceptions, a federal court
cannot
issue an injunction.
Atlantic Coast,
[W]hen a federal court is asked to enjoin proceedings in a state court, the fact that the case falls within an exception to § 2283 does not “qualify in any way the principles of equity, comity, and federalism that must restrain a federal court *1182 when asked to enjoin a state court proceeding.”
17
Wright § 4226, at 347 (quoting
Mitchum v. Foster,
Contrary to Kerr-McGee’s suggestion, Appellant’s Brief at 10, the district court has discretion under the Anti-Injunction Act to refuse to issue an injunction even if the prior federal court judgment dealt with federal preemption of state law. This is especially true in this case because Kerr-McGee is not presently subject to (and may never be subject to) conflicting requirements under federal and state law. Kerr-McGee can raise the preemption issue as a defense in the pending state court suit, as it did when it made its mоtion for partial summary judgment. Relief from error in the trial court, if any, can hopefully be obtained through the state appellate courts and ultimately through appeal to the United States Supreme Court.
See Atlantic Coast,
rv.
Because we hold that the district court correctly concluded that it did not have the authority under the Anti-Injunction Act to enjoin the pending state court suit, we need not reach the state’s claim that we should abstain from interfering with the state court suit under
Younger v. Harris,
Notes
. The progress of the state suit was delayed by Kerr-McGee’s unsuccessful attempt to have it removed to federal court.
Illinois v. Kerr-McGee Chem. Corp.,
. Kerr-McGee also brought an interlocutory appeal of the state tnal court’s decision denying its motion for partial summary judgment and its alternative motion for a stay of proceedings pending the conclusion of the action before the NRC. The state appellate court did not reach the preemption issue because thаt claim was not within its limited scope of review in an interlocutory appeal.
Illinois v. Kerr-McGee Chem. Corp.,
. If the state is bound by Brown, it would be barred from relitigating the preemption issue on the basis of collateral estoppel, rather than res judicata:
Preclusion of such nonparties falls under the rubric of collateral estoppel rather than res judicata because the latter doctrine presupposes identity between causes of action. And the cause of action which a nonparty has vicariously asserted differs by definition from that which he subsequently seeks to litigate in his own right.
Montana v. United States,
. None of the cases cited by Kerr-McGee contradicts this general proposition. Only one of these cases involves the issue whether a governmental body is bound by a prior suit litigated solely by a private citizen. In
Montana v. United States,
The other cases cited by Kerr-McGee involve a prior adjudication in which a public body was a
*1181
participant; the prior adjudication was then used to bind a governmental unit or a private party.
See Southwest Airlines Co. v. Texas Int'l Airlines, Inc.,
"Private litigation may be precluded by public action, since ‘gоvernments are by their nature representative of the cumulative rights of private citizens.’ ” 18 Wright § 4458, at 521 (quoting
United States v. East Baton Rouge Parish School Bd.,
. The state appellate cоurt indicated that Kerr-McGee could raise its preemption claim if it takes an appeal from the final judgment of the trial court.
Illinois v. Kerr-McGee Chem. Corp.,
We also note that it is always open to Congress to adjust more definitively the balance between federal and state prescriptions in matters of waste disposal.
