Riсhard McCarthy appeals the district court’s dismissal of his action against the United States under the Federal Tort Claims Act (FTCA), 28 U.S.C. §§ 1346(b) and 2671 et seq. McCarthy was severely injured in a diving accident that occurred at a lake owned and operated by the United States and the Army Corps of Engineers as part of a federal flood control project. The district court concluded the United States was immune from liability under the Flood Control Act of 1928, 33 U.S.C. § 702c. We affirm.
I.
Lewisville Lake is a reservoir in Denton County, Texas constructed by the Army Corps of Engineers “in the interest ... of flood control” under the River and Harbor Act, as amended, March 2, 1945, 33 U.S.C. § 603a (1982). Although the State of Texas owns the water of Lewisville Lake, the United States owns the underlying land. The dam, constructed in connection with the flood control project, is owned and operated by the United States. Lewisville Lake is a multi-purpose project lake that has flood control as оne of its purposes. The Corps monitors its water level daily and adjusts discharge rates when necessary.
The Lake also contains seventeen discrete parks, one of which is East Copperas Park. The Army Corps of Engineers operates East Copperas Park, and nine other parks lоcated along the perimeter of the Lake, as a recreational facility. The construction, maintenance and operation of East Copperas Park is authorized by 16 U.S.C. § 460d (1982). East Copperas Park does not have a designated swimming area. Its facilities include picnic tables, а boat ramp, and vehicle parking spaces. There is no use fee charged at the Park.
On April 20,1984 Robert McCarthy went to East Copperas Park at Lewisville Lake to windsurf with two friends. Plaintiff dove into the water, at a point where he was about waist-deep, struck his head on the bottom of the lake аnd fractured his neck. As a result of his accident, McCarthy was rendered a quadriplegic.
McCarthy filed suit in federal district court, after his claim had been presented to and denied by the Department of the Army, on March 20, 1986. The complaint alleged: that the defendant constructed, maintained, operаted and controlled the premises on which plaintiff was injured; that defendant controlled and permitted access to the location where plaintiff was injured and encouraged such use of the beach; that defendant had observed, but failed to prohibit, swimming and diving at that location; that the prеmises were dangerous and defective in several particularly *560 described respects, and that defendant knew it; that despite such knowledge, defendant encouraged the public to dive there, failed to give any warning to foreseeable users of the beach of the known dangerous conditions, failed to prohibit diving, and failed to inspect the beach or make it safe.
The trial court, relying on
United States v. James,
II.
The district court concluded it had no jurisdiction, based on its finding that § 702c immunity applied, and dismissed the action. McCarthy contends that the district court’s dismissal, pursuant to the government’s motion under Fed.R.Civ.P. 12(b)(1) and 12(b)(6), should be treated as one for summary judgment under Rule 56 as matters outside the pleadings were received and considered. We disagree.
The question whether the United States has waived its sovereign immunity against suits for damages is, in the first instance, a question of subject matter jurisdiction.
See, e.g., Nevin v. United States,
Moreover, when considering a motion to dismiss pursuant to Rule 12(b)(1) the district court is not restricted to the face of the pleadings, but may review any evidеnce, such as affidavits and testimony, to resolve factual disputes concerning the existence of jurisdiction.
See, e.g., Land v. Dollar,
III.
The question presented is whether McCarthy’s action falls within the immunity provision of the Flood Control Act of 1928, 33 U.S.C. § 702c (1982). Section 702c provides: “No liability of any kind shall attach to or rest upon the United States for any damage from or by floods or flood waters at any place.” The Supreme Court recently underscored the broad scope of this provision in
United States v. James,
James
involved accidents at flood control projects where recreational users of reservoirs were swept through water retaining structures when those structures were opened to release waters in order to control flooding.
James,
Given the definition of “floodwaters” and “damage” articulated in
James,
as well as the standards we have set out in
pre-James
cases for determining the scope of § 702c immunity, we conclude the immunity provision applies in this case. First,
James
made clear the term “floodwater” is to apply to “all waters contained in ... a federal flood control project for purposes of or related to flood control ...”
Second, we find there is a sufficient nexus between the injury sustained by McCarthy and the operation of a Congressionally authorized federal flood control project. We have stated that “if injury resulted from the operation of [a] federal project for flood control purposes, government immunity is complete.”
Morici Corp. v. United States,
Wе have previously indicated that § 702c immunity applies where the operation of flood control facilities allegedly resulted in crop damage due to seepage of water,
Morici,
Given the difficulty of distinguishing between the active and passive operations of federal flood control facilities, particularly since a passive condition is invariably the result of other active fоrces which have gone before, we decline to adopt the distinction urged by McCarthy. By including Lewisville Lake as part of a larger federal flood control facility, the United States created a “condition” which under a variety of circumstances could result in harm to person and proрerty. As the Supreme Court underscored in
James,
the “sweeping language” and legislative history of § 702c indicate a Congressional intent “to ensure beyond doubt that sovereign immunity would protect the government from ‘any’ liability associated with flood control.”
James,
Nor is this conclusion altered by the mul-ti-purpose nature of the flood control facility at Lewisville Lake. It is clear the immunity provisiоn of § 702c can apply even though a federal project has multiple purposes and is not intended exclusively for flood control.
Morici,
In
Morici
we approved that portion of the discussion in
Hayes
which stated “[t]here is no immunity for flooding caused by a federal project unrelated to flood control.”
See Morici,
Thus, in this circuit, the immunity provision of § 702c does not apply when the damage or injury is “wholly unrelated to any Act of Congress authorizing expenditures of federal funds for flood control, or any act undertaken pursuant to any such authorization.”
Morici,
Here, however, the necessary connection to a Congressionally authorized federal
*563
flood contrоl project is present. Lewisville Lake is a reservoir that forms part of a larger flood control project, authorized by Congress under the River and Harbor Act, 33 U.S.C. § 603a, for the purpose of flood control. Under
Morici,
“[ejven if the project was being operated at the time of the negligence for a purpose other than flood control,” so long as the damage or injury was not “wholly unrelated” to a Congressionally authorized flood control project, a sufficient nexus for purposes of § 702c immunity exists.
Morici,
Finally, we consider McCarthy’s claims regarding the government’s alleged failure to post warning signs or other notices to recreational users of East Copperas Park and Lewisville Lake. In
James
the Supreme Court indicated “that the manner in whiсh to convey warnings, including the negligent failure to do so, is part of the ‘management’ of a flood control project.”
James,
IV.
Section 702c of the Flood Control Act of 1928, as construed by the Supreme Court in James, bars McCarthy’s action under the FTCA for the personal injuries he sustained while using the waters of Lewisville Lake, a federal flood control reservoir, for recreational purposes. The district court lacked subject mаtter jurisdiction over the action, and accordingly, properly dismissed.
AFFIRMED.
Notes
. It is also evident that the personal injuries sustained by McCarthy fall within the term "damage” of § 702c.
James
expressly found that the word “damage” included both injury to property and injury to the person.
James,
. This distinction between the
Morid
and
Hayes
standards for determining the scope of § 702c immunity explains why appellant’s reliance on
Denham v. United States,
In James, the Supreme Court cited both Hayes and Morid, emphasizing the "without relation” language of Hayes and the “wholly unrelated” standard of Morici. See James, 106 S.Ct. at 3122, n. 7.
