Ashley Peterson, et al. v. United States of America and Does 1-100

District Court, S.D. California·Decided January 12, 2026·No. 3:25-cv-01916·Unknown

Opinion

UNITED STATES DISTRICT COURT SOUTHERN DISTRICT OF CALIFORNIA

ASHLEY PETERSON, et al., Case No.: 25-cv-01916-H-SBC

Plaintiffs, ORDER GRANTING DEFENDANT’S v. MOTION TO DISMISS WITH LEAVE TO AMEND UNITED STATES OF AMERICA and DOES 1-100, [Doc. No. 6.] Defendants.

On December 2, 2025, Defendant United States of America (“the United States”) filed a motion to dismiss Plaintiffs Ashley Peterson, Mark Peterson, II, and C.P.’s complaint pursuant to Fed. R. Civ. P. 12(b)(1) for lack of jurisdiction and Fed. R. Civ. P. 12(b)(6) for failure to state a claim for which relief can be granted. (Doc. No. 6.) On December 29, 2025, Plaintiffs filed a response in opposition to Defendant’s motion to dismiss. (Doc. No. 9.) On January 5, 2026, the United States filed its reply. (Doc. No. 12.) On January 5, 2026, the Court took the matter under submission. (Doc. No. 11.) For the reasons below, the Court grants the United States’s motion to dismiss. / / / / / / Background The following factual background is taken from the allegations in Plaintiffs’ complaint and the United States’s Request for Judicial Notice. On July 29, 2023, three individuals rented two privately owned, personal watercrafts for use in Mission Bay in San Diego, California. (Doc. No. 1, Compl. ¶¶ 27-29.) At approximately 1:52 p.m., one of the personal watercrafts struck and killed S.P. (the “Decedent”), a twelve-year-old child who was on a stand-up paddle board near De Anza Cove in Mission Bay. (Id. ¶¶ 40, 48, 49.) The operator of the personal watercraft that struck S.P. was arrested, charged, and ultimately pled guilty to vehicular manslaughter with gross negligence. (Doc. No. 5-4, Ex. D; Doc. No. 10 at 6.) On June 17, 2024, Plaintiffs filed a personal injury and wrongful death suit in Superior Court of California, County of San Diego, against the City of San Diego, the County of San Diego, the State of California, various employees of those public entities, the operators of the personal watercrafts, the owners and lessors of the personal watercrafts, and the website through which the rental was arranged. (Doc. No. 6 at 11.) On July 28, 2025, Plaintiffs filed a complaint against the United States and Does 1- 100. (Doc. No. 1, Compl.) Plaintiff Ashley Peterson is S.P.’s surviving natural mother and the appointed administrator of the estate of S.P. (Id. ¶¶ 3, 4.) Plaintiff Mark Peterson, II is S.P.’s surviving natural father, and Plaintiff C.P. is S.P.’s surviving natural brother. (Id. ¶¶ 5, 6.) Plaintiffs all reside in the County of San Diego. (Id. ¶¶ 3-6.) Plaintiffs claim that the United States, through the United States Army Corps of Engineers and the United States Coast Guard, maintains, operates, controls, monitors, patrols, oversees, regulates, or administers the waters and marinas of Mission Bay, San Diego in conjunction with the City of San Diego and the State of California. (Id. ¶¶ 8, 22.) Plaintiffs also assert that the United States is responsible for placing and maintaining “aids of navigation” throughout Mission Bay, pursuant to an agreement with the State of California and the City of San Diego. (Id. ¶¶ 8, 25, 26.) Plaintiffs’ complaint alleges claims for: (1) negligence and other wrongful conduct under the Suits in Admiralty Act, 46 U.S.C. § 30901 et seq.; (2) negligence and other wrongful conduct under the Public Vessels Act, 46 U.S.C. § 31101 et seq.; and, in the alternative, (3) negligence and other wrongful conduct under the Federal Tort Claims Act, 28 U.S.C. § 1346(b) et seq. (Id. ¶¶ 58-80.) In particular, Plaintiffs allege the United States failed to demarcate or separate hazardous areas, adequately regulate or prevent dangerous and unauthorized personal watercraft rentals, provide appropriate warnings or signage, patrol or enforce safety hazards in Mission Bay, and issue adequate guidance, training, or materials for rental activity in Mission Bay. (Id. ¶¶ 44-47.) By the present motion, the United States moves to dismiss Plaintiffs’ Suits in Admiralty claim pursuant to Fed. R. Civ. P. 12(b)(6) for failure to state a claim and Plaintiffs’ Public Vessel Act and Federal Tort Claims Act claims pursuant to Fed. R. Civ. P. 12(b)(1) for lack of jurisdiction. (Doc. No. 6 at 8, 13-24.) Discussion I. Legal Standards A. Fed. R. Civ. P. 12(b)(1) Standard for Lack of Subject-Matter Jurisdiction Federal courts are courts of limited jurisdiction. United States v. Mark, 530 F.3d 799, 810 (9th Cir. 2008). “Without jurisdiction the court cannot proceed at all in any cause. Jurisdiction is power to declare the law, and when it ceases to exist, the only function remaining to the court is that of announcing the fact and dismissing the cause.” Steel Co. v. Citizens for a Better Environment, 523 U.S. 83, 94 (1998). Subject matter jurisdiction cannot be waived and when a district court lacks subject matter jurisdiction, the action must be dismissed. Fed. R. Civ. P. 12(h)(3). The burden is on the plaintiff to establish that the court has subject matter jurisdiction over an action. Assoc. of Am. Med. Colls. v. United States, 217 F.3d 770, 778–79 (9th Cir. 2000). A Rule 12(b)(1) jurisdictional attack may be facial or factual. White v. Lee, 227 F.3d 1214, 1242 (9th Cir. 2000). In a facial attack, the challenger asserts “that the allegations contained in a complaint are insufficient on their face to invoke federal jurisdiction.” Safe Air for Everyone v. Meyer, 373 F.3d 1035, 1039 (9th Cir. 2004). In a factual attack, the challenger “disputes the truth of the allegations that, by themselves, would otherwise invoke federal jurisdiction.” Id. In resolving a factual challenge, the court “may review evidence beyond the complaint without converting the motion to dismiss into a motion for summary judgment.” Id. Where, as here, a Rule 12(b)(1) motion is brought alongside a Rule 12(b)(6) motion, it is appropriate for the court to first consider and address the disputed jurisdictional issues before analyzing the merits of the claims. See Maya v. Centex Corp., 658 F.3d 1060, 1068 (9th Cir. 2011) (“The jurisdictional question of standing precedes, and does not require, analysis of the merits.” (citation omitted)). B. Fed. R. Civ. P. 12(b)(6) Standard for Failure to State a Claim A motion to dismiss under Federal Rule of Civil Procedure 12(b)(6) tests the legal sufficiency of the pleadings and allows a court to dismiss a complaint if the plaintiff has failed to state a claim upon which relief can be granted. See Conservation Force v. Salazar, 646 F.3d 1240, 1241 (9th Cir. 2011) (citing Navarro v. Block, 250 F.3d 729, 732 (9th Cir. 2001)). Federal Rule of Civil Procedure 8(a)(2) requires tha

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Ashley Peterson, et al. v. United States of America and Does 1-100, (S.D. Cal. 2026).

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