This month, the United States Court of Appeals for the Ninth Circuit held in Confederated Tribes of the Colville Rsrv. v. Teck Cominco Metals Ltd, No. 24-5565, 2025 WL 2525853 (9th Cir. Sept. 3, 2025) that CERCLA permits recovery of natural resource damages with a cultural use component, effectively reversing the district court’s holding that cultural resource damages are not authorized under CERCLA. Read More »

Share | Email| Comments|  Topics: CERCLA, Citizen Suit, Citizens Suit, Contamination, Natural Resource Damages, Ninth Circuit, Pollutants, Tribal Lands, Water, Water Use

On June 30, 2025, the Supreme Court denied the Port of Tacoma (the “Port”) and SSA Terminals LLC's (“SSA”) petition for writ of certiorari to review the 9^th Circuit’s decision in Port of Tacoma v. Puget Soundkeeper Alliance addressing whether the Clean Water Act (“CWA”) authorizes citizens to enforce conditions of state-issued pollutant discharge permits adopted under state law that impose a greater scope of coverage than required by the CWA.  The 9th Circuit answered this question in the affirmative, holding that Washington's Industrial Stormwater General Permits (“ISGP”), a CWA National Pollutant Discharge Elimination System (“NPDES”) permit, required the Port and SSA to have the necessary stormwater controls across the entire West Sitcum Terminal (the “Terminal”).  The Supreme Court's recent decision to deny certiorari leaves litigants open to a patchwork of Circuit determinations on the scope of the CWA’s citizen suit provision.  Read More »

Share | Email| Comments|  Topics: Citizen Suit, Citizens Suit, Clean Water Act, Ninth Circuit, NPDES, Permits, Private Right of Action, Stormwater, Supreme Court, United States Supreme Court, Water

In a January 17, 2025 opinion in the cases of Montana Wildlife Federation et al. v. Deb Haaland et al. and Western Watersheds Project et al. v. Deb Haaland et al., the United States Court of Appeals for the Ninth Circuit examined a number of oil and gas leases in Idaho and Montana sold during the prior Trump administration, vacating some and overturning vacatur of others. The opinion offers insight into how a court may look to analyze improper agency action in instances where significant economic expenditure has already taken place. Read More »

Share | Email| Comments|  Topics: Agency Action, Citizens Suit, Exploration, Federal Land Policy and Management Act, Leases, Mineral Rights, NEPA, Ninth Circuit, Oil and Gas, Public Lands

In Sackett v. EPA, 2023 WL 3632751 (U.S. May 23, 2023), the Supreme Court limited the authority of the United States Environmental Protection Agency (“EPA”) to regulate wetlands by embracing a “continuous surface connection test” to determine if adjacent wetlands are subject to the Clean Water Act (“CWA”) and explicitly rejecting Justice Kennedy’s “significant nexus” test from Rapanos v. United States, 547 U.S. 715, 754 (2006). While the 9-0 decision was unanimous in judgment by holding that the Sacketts’ wetland was not subject to federal jurisdiction, the court was sharply divided as to the test to determine when an adjacent wetland qualifies as a Water of the United States (or “WOTUS”).  A five-justice majority held that the CWA’s jurisdiction includes only adjacent wetlands that are indistinguishable from WOTUS due to a continuous surface connection. Under this framework, for an adjacent wetland to be subject to CWA jurisdiction, the adjacent body of water must constitute a WOTUS, and the adjacent wetland must have a continuous surface connection with the WOTUS such that it is difficult to determine where the body of water ends and the wetland begins.  The majority’s holding casts serious doubt on the continuing viability on the final WOTUS rule that became effective earlier this year and relied in part on the “significant nexus” test that EPA and the United States Army Corps have applied through guidance since the Rapanos decision. See 88 Fed. Reg. 3004 (Jan. 18, 2023). Read More »

Share | Email| Comments|  Topics: Clean Water Act, Decisions of Note, EPA, Major Questions Doctrine, Navigability, Ninth Circuit, Rapanos, Supreme Court, United States Supreme Court, Wetlands

This Blog Post was authored by Omar Khodor, a summer associate.

On June 23, 2021, the Ninth Circuit, in directing the lower court to dismiss a citizen’s suit claim under the Clean Water Act (“CWA”), held that the CWA did not abrogate tribal sovereign immunity. Deschutes River All. v. Portland Gen. Elec. Co., No. 18-35867, 2021 WL 2559477 (9th Cir. June 23, 2021). To abrogate a Tribe’s sovereign immunity, the Ninth Circuit explained that a statute must convey “perfect confidence” that Congress intended to abrogate tribal sovereign immunity. Id. at 14. It further found that the CWA does not unequivocally do so because Section 1365 – a section explicitly dealing with United States and governmental sovereign immunity – does not mention tribal sovereign immunity. Id. at 15-16. Rather, Section 1365 states that “any citizen may commence a civil action on his own behalf . . . against any person (including (i) the United States, and (ii) any other governmental instrumentality or agency to the extent permitted by the eleventh amendment to the Constitution).” 33 U.S.C. § 1365. Although Section 1362(5) of the CWA goes on to define “any person” as a municipality (among other things), and Section 1362(4) further defines a “municipality” as including an “Indian Tribe or an authorized Indian Tribal organization,” the court determined that Congress had not clearly intended to abrogate tribal sovereign immunity because Tribes are not included in Section 1365. Deschutes River All., 2021 WL 2559477 at *15-16. Read More »

Share | Email| Comments|  Topics: Citizen Suit, Clean Water Act, Energy, Federal Procedure, Ninth Circuit, Procedure, Sovereign Immunity, Tribal Lands

In a split decision that could have ramifications for future lawsuits involving the present pandemic, a majority panel in the Ninth Circuit held that the United States was not liable under CERCLA as an “operator” at the Lava Cap Mine Superfund Site when it ordered the mine to shut down during World War II. United States v. Sterling Centrecorp Inc., No. 18-15585 (9^th Cir. Oct. 5, 2020). The decision will likely spell some relief for local, state, and federal officials that have issued similar shutdown orders across the United States during the COVID-19 pandemic. Read More »

Share | Email| Comments|  Topics: California, CERCLA, Cleanup, Contamination, Mining, Ninth Circuit, Operator Liability, Superfund

On September 14, 2020, the U.S. Court of Appeals for the Ninth Circuit held that speculative, potential future response costs are not recoverable in a contribution action under CERCLA, even if the party seeking contribution has already made an expenditure for such costs pursuant to a settlement. The response costs at issue in ASARCO LLC v. Atlantic Richfield Co, No. 18-35934, D.C. No. 6:12-cv-00053-DLC (9th Cir. Sept. 14, 2020) were part of a cash-out bankruptcy settlement that resolved plaintiff ASARCO LLC’s liability for several contaminated sites. Only a portion of the settlement funds paid by ASARCO had been spent on remediating the site in question, with the rest held in trust to address future potential response costs. Although the Ninth Circuit affirmed the district court’s allocation of 25 percent of the cleanup responsibility to the defendant, Atlantic Richfield, it vacated and remanded the district court’s decision with respect to the future costs. Read More »

Share | Email| Comments|  Topics: Allocation, Bankruptcy, CERCLA, Cleanup, Contamination, Contribution, Cost Recovery, Montana, Ninth Circuit, Remediation, Superfund

The Federal Tort Claims Act permits claims for monetary damages against the United States for injury or loss of property caused by the wrongful acts of federal employees. See 28 U.S.C. § 1346(b)(1). However, this waiver of sovereign immunity is limited by the discretionary function exception, which preserves immunity for claims “based upon the exercise or performance or the failure to exercise or perform a discretionary function or duty on the part of a federal agency or an employee of the Government.” 28 U.S.C. § 2680(a). Recently, the United States Court of Appeals for the Ninth Circuit analyzed the discretionary function exception in the context of environmental contamination, finding that the exception does not apply to what can best be described as ordinary negligence in the performance of a site remediation. Nanouk v. United States, No. 13-35116 (Sept. 4, 2020). Read More »

Share | Email| Comments|  Topics: Alaska, Cleanup, Contamination, Federal Tort Claims Act, Negligence, Ninth Circuit, Nuisance, Odors, PCBs, Property Damage, Remediation, Removal, Sovereign Immunity, Toxic Torts, Trespass

On August 10, 2020, the Ninth Circuit reversed a lower court’s grant of defendants’ motion for summary judgement, permitting plaintiffs’ case to move forward in a Superfund action for contribution. See Arconic v. APC Investment, No. 19-55181 (9th Cir. Aug. 10, 2020), a case we had reported on here. At issue was whether a settlement between plaintiffs and certain de minimis parties for future potential response costs was an adequate triggering event for the statute of limitations period (against different defendants) in an action for contribution under CERCLA Section 113(f). The Ninth Circuit held that it was not, explaining that in the context of a “judicially approved settlement,” the proper triggering event was a settlement which imposed actual cleanup costs in excess of a party’s estimated liability at the site. Read More »

Share | Email| Comments|  Topics: California, Case Update, CERCLA, Contamination, Contribution, Groundwater, Ninth Circuit, Statute of Limitations, Superfund

In a report and recommendation issued last week, a magistrate judge with the United States District Court for the District of Idaho found that disputes of fact preclude summary judgment on the majority of claims brought by a landfill against the United States Air Force and two other defendants. Idaho Waste Systems, Inc. v. U.S. Air Force, No. 1:18-cv-00229 (D.C. Idaho Jan. 27, 2020). The magistrate judge recommended dismissing state law claims brought against the Air Force on sovereign immunity grounds, but found that most of the remaining claims, including claims under CERCLA, should go to trial. Read More »

Share | Email| Comments|  Topics: Arranger Liability, Cases to Watch, CERCLA, Contribution, Cost Recovery, Federal Tort Claims Act, Iowa, Landfill, Ninth Circuit, Nuisance, Property Value, Response Action Contractors, Sovereign Immunity, Superfund, Trespass