delivered the opinion of the Court.
Petitioner Northern Insurance Company of New York (Northern) filed suit against respondent Chatham County, Georgia (County), in the United States District Court for the Southern District of Georgia, seeking damages resulting from an alleged tort committed by employees of the County. The District Court granted the County’s motion for summary judgment on the ground that the suit was barred by sovereign immunity. Relying on Circuit precedent, the Court of Appeals for the Eleventh Circuit affirmed. We granted certiorari to consider “[wjhether an entity that does not qualify as an ‘arm of the State’ for Eleventh Amendment purposes can nonetheless assert sovereign immunity as a defense to an admiralty suit.”
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The County owns, operates, and maintains the Causton Bluff Bridge, a drawbridge over the Wilmington River. On October 6, 2002, James Ludwig requested that the bridge be raised to allow his boat to pass. The bridge malfunctioned, a portion falling and colliding with Mr. Ludwig’s boat. As a result of the collision, Mr. Ludwig and his wife incurred damages in excess of $130,000.
The Ludwigs submitted a claim for those damages to their insurer, Northern, which paid in accordance with the terms of their insurance policy. Northern then sought to recover its costs by filing suit in admiralty against the County in the District Court. The County sought summary judgment, arguing that Northern’s claims were barred by sovereign immunity. The County conceded that Eleventh Amendment immunity did not extend to counties, but nonetheless contended that it was immune under “the universal rule of state immunity from suit without the state’s consent.” Defendant’s Brief in Support of Motion for Summary Judgment, Case No. CV403-099, App. 33a. The District Court agreed, relying on
Broward County
v.
Wickman,
The Eleventh Circuit, which was bound to follow
Wickman
as Circuit precedent, affirmed.
1
The Court of Appeals acknowledged that the County did not assert an Eleventh Amendment immunity defense, which would fail because, under Circuit precedent, the County did not qualify as an arm of the State.
Zurich Ins. Co.
v.
Chatham County,
No. 04-13308 (Jan. 28, 2005), App. 83a, n. 1, judgt. order re
*193
ported at
II
This Court’s cases have recognized that the immunity of States from suit “is a fundamental aspect of the sovereignty which the States enjoyed before the ratification of the Constitution, and which they retain today . . . except as altered by the plan of the Convention or certain constitutional Amendments.”
Alden
v.
Maine,
A consequence of this Court’s recognition of preratification sovereignty as the source of immunity from suit is that only States and arms of the State possess immunity from suits authorized by federal law. See
id.,
at 740;
Mt. Healthy City Bd. of Ed.
v.
Doyle,
The County argues that this Court’s cases recognize a distinct “residual” immunity that permits adoption of a broader test than we apply in the Eleventh Amendment context to determine whether an entity is acting as an arm of the State and is accordingly entitled to immunity.
2
Brief for Respondent 28. But this Court’s use of that term does not suggest the County’s conclusion; instead, this Court has referenced only the States’ “residuary and inviolable sovereignty” that survived the Constitution. See The Federalist No. 39, p. 245 (C. Rossiter ed. 1961) (J. Madison);
Federal Maritime Comm’n
v.
South Carolina Ports Authority,
Because the County may claim immunity neither based upon its identity as a county nor under an expansive arm-of-the-State test, the County is subject to suit unless it was acting as an arm of the State, as delineated by this Court’s precedents, in operating the drawbridge.
Alden, supra,
at 756;
Lake Country Estates, supra,
at 400-401. The County conceded below that it was not entitled to Eleventh Amendment immunity, and both the County and the Court of Appeals appear to have understood this concession to be based on the County’s failure to qualify as an arm of the State under our precedent. See App. 83a, n. 1 (recognizing that the County rightly disclaimed an Eleventh Amendment immunity defense because such a defense would be inconsistent
*195
with the court’s holding in
Vierling
v.
Celebrity Cruises, Inc.,
As an alternative ground for affirmance, the County asks the Court to recognize a distinct sovereign immunity against
in personam
admiralty suits that bars cases arising from a county’s exercise of core state functions with regard to navigable waters. Recognition of a distinct immunity in admiralty cases cannot be reconciled with our precedents. Immunity in admiralty, like other sovereign immunity, is simply an application of “the fundamental rule” that “the entire judicial power granted by the Constitution does not embrace authority to entertain a suit brought by private parties against a State without consent given.”
Ex parte New York,
The County nonetheless contends — and the Eleventh Circuit, in reliance upon the Fifth Circuit’s analysis in
Wickman,
held — that the reach of
Workman
is limited, and that this Court’s decision in
Ex parte New York, supra,
demonstrates that
Workman
does not govern the instant case. See
Wickman,
* *
Because the County has failed to demonstrate that it was acting as an arm of the State when it operated the Causton Bluff Bridge, the County is not entitled to immunity from Northern’s suit. Accordingly, the judgment of the Court of Appeals is reversed.
It is so ordered.
Notes
See
Bonner
v.
Prichard,
It is unclear whether respondent believes that residual immunity is a common-law immunity that has been unaltered by federal substantive law, see Brief for Respondent 18 (“Chatham County’s sovereign immunity derives from the common law which pre-dates Eleventh Amendment immunity”), or, as the Solicitor General appears to believe, a constitutionally based immunity that is distinguishable from the one drawn from the constitutional structure, see Tr. of Oral Arg. 16 (“What respondent calls residual sovereign immunity ... is the doctrine of constitutional sovereign immunity”). In either case, it appears that the residual immunity would serve to extend sovereign immunity beyond its preratification scope.
