Alabama v. North Carolina
The Supreme Court ruled that North Carolina did not violate its obligations under a regional nuclear-waste compact when it stopped trying to build a disposal facility after outside funding dried up, and that the compact's oversight commission had no power to fine the state for pulling out.
The decision limits how far interstate compacts and the commissions that run them can go in punishing member states, and it leaves open, for further proceedings, whether the commission itself can even sue a state given constitutional limits on such suits.
“We do not—we cannot—add provisions to a federal statute.”
Explaining why the Court would not read an implied good-faith duty into the interstate compact.
How it got here: Other member states and the compact's commission got the Supreme Court's permission to sue North Carolina directly under its original jurisdiction over disputes between states, and a Special Master heard the case and issued two reports.
The Case in Depth
What happened
Eight Southern states formed a congressionally approved compact to jointly manage disposal of low-level nuclear waste. A commission representing the states picked North Carolina to host a second disposal facility and helped pay for years of licensing work. When the commission cut off funding in 1997 amid ballooning costs, North Carolina stopped work, later withdrew from the compact, and refused to pay penalties the commission tried to impose on it.
The question before the Court
When North Carolina walked away from a multistate nuclear-waste disposal project, could its partner states or their oversight commission force it to pay tens of millions of dollars in penalties?
The Court's answer
Mostly no. The Court ruled that the compact's commission never had authority to impose money penalties on North Carolina in the first place, because the compact's text only mentioned suspending a state's rights or revoking its membership—not fines—while other similar compacts approved by Congress at the same time expressly allowed monetary sanctions. The Court also found North Carolina did not breach its promise to take "appropriate steps" toward licensing, because the states' own history of jointly funding the project showed North Carolina was never expected to foot the whole bill alone once outside money stopped.
On a separate question, the Court allowed the commission's claims tied to the compact to move forward alongside the states' claims, relying on existing precedent that lets a non-sovereign party piggyback on overlapping claims already properly before the Court, though it left unresolved whether the commission's other claims survive sovereign immunity once the facts are further developed.
Curious how the Court got there? See the step-by-step legal reasoning →
Why it matters
States that join interstate compacts—agreements Congress must approve—now have a clearer sense of how far a compact commission's punishing power reaches, useful when negotiating cost-sharing arrangements for shared projects. The decision also signals that state sovereign immunity remains a real barrier even when a compact commission sues alongside member states with an unquestioned right to sue.
What changes now
The ruling finally resolves whether North Carolina broke its contract and what it owes on the compact-based claims (Counts I and II)—those claims are over. But questions about the commission's separate restitution-style claims (Counts III–V) and whether sovereign immunity blocks them were sent back for more fact-finding before the Special Master, so the broader litigation continues.
What this does not decide
The Court left open whether the commission's remaining claims for unjust enrichment, promissory estoppel, and money had and received can proceed once the facts are further developed, and whether sovereign immunity ultimately bars them. It also expressly declined to decide whether to overrule Arizona v. California, ruling only that nothing since had implicitly undone it.
Concurrences and dissents
Concurrence — Justice Kennedy
Justice Kennedy agreed the Court cannot add unwritten terms to a compact-as-federal-statute, but stressed that compacts are also agreements between sovereign parties, so courts may still consult contract- and treaty-interpretation principles to discern the parties' intent. He agreed that nothing in this compact showed an intent to limit North Carolina's right to withdraw.
Dissent in part — Justice Roberts
“Our Constitution does not countenance such “no harm, no foul” jurisdiction, and I respectfully dissent.”Roberts's objection to letting the commission sue alongside states despite lacking sovereign immunity itself.
Chief Justice Roberts joined most of the Court's opinion but dissented from letting the commission sue North Carolina at all, arguing that the Eleventh Amendment bars any private-party suit against a nonconsenting state regardless of whether the claims overlap with a sovereign plaintiff's. He argued Arizona v. California rests on weak, poorly reasoned grounds that later sovereign-immunity cases have undermined.
Dissent in part — Justice Breyer
Justice Breyer agreed with most of the Court's opinion but argued North Carolina did breach its compact duty, since it took no steps whatsoever toward licensing for a year and a half before withdrawing. He viewed the compact's structure as placing ultimate funding responsibility on the host state, and found the majority's course-of-performance analysis unsupported by the record.
How the Court got there
The legal reasoning, step by step
- The Court first asked whether the compact's text actually gave the commission power to impose money penalties, since rights and powers granted by an interstate compact cannot be read to include authority the compact's language doesn't spell out. Comparing this compact to similar ones Congress approved at the same time—several of which explicitly allowed monetary sanctions—the Court concluded the silence here meant the commission never had that power.
- Because the compact's text did not make the commission the 'sole arbiter' of whether North Carolina had broken its promises—a status that would require explicit compact language—the Court held it owed no special deference to the commission's own finding of breach, and instead decided the breach question itself, weighing the facts and law independently rather than under deferential administrative-law standards.
- Turning to the merits, the Court read North Carolina's duty to take only 'appropriate' licensing steps—not every conceivable step—and looked to how the parties had actually behaved over the years (their 'course of performance') to figure out what 'appropriate' meant. Because the commission had always treated outside funding as necessary and had covered most of the costs, the Court concluded North Carolina was never expected to fund the project alone.
- Once the commission cut off funding entirely, the Court reasoned that continuing to spend money toward a license that might never be usable was not 'appropriate,' so stopping was not a breach; the same reasoning defeated the argument that North Carolina had repudiated (openly refused to perform) its obligations.
- On the withdrawal claim, the Court declined to read an unwritten 'good faith' requirement into the compact, reasoning that a congressionally approved compact is a federal statute and courts cannot add conditions Congress did not include, especially given language in the compact protecting each state's own sovereign rights.
- Finally, on whether the commission—not a sovereign state—could sue North Carolina despite the state's usual immunity from private lawsuits, the Court relied on existing precedent allowing a non-sovereign party to join claims already properly brought by parties with an unquestioned right to sue, so long as the non-sovereign's claims were entirely overlapping and added nothing new to the suit.
Doctrinal impact
Cases affected by this decision
Reaffirms Texas v. New Mexico (462 U. S. 554)
Relied on to decide how much deference a compact commission's rulings deserve and how compacts should be compared and interpreted.
Reaffirms Arizona v. California (460 U. S. 605)
Court declined to overrule it and used it to allow the commission to join the states' overlapping claims despite sovereign immunity.