Background
After Idaho’s Snake River Basin Adjudication confirmed thousands of federal stockwater rights on federal land, Idaho enacted a series of “stockwater amendments.” The United States sued Idaho, the Idaho Department of Water Resources, and its director, arguing that several provisions were designed to divest the federal government of its adjudicated rights. The Idaho Legislature and a group of ranching interests, including the Idaho Farm Bureau Federation, intervened as defendants.
The district court rejected jurisdictional arguments based on prior exclusive jurisdiction, Burford abstention, and other doctrines. On the merits, it held that Idaho Code § 42-224 was constitutional as applied to the United States but that §§ 42-113(2)(b), 42-502, and 42-504 were facially unconstitutional under the Supremacy Clause. The United States appealed the § 42-224 ruling, while Idaho and the intervenors challenged jurisdiction and the ruling on § 42-113(2)(b).
The Court’s Holding
The Ninth Circuit affirmed the district court’s jurisdictional rulings. Prior exclusive jurisdiction did not apply because the federal suit challenged the constitutionality of Idaho statutes rather than seeking an in rem determination of water rights. Burford abstention was also unavailable because the case presented separable federal constitutional questions, did not challenge an action by Idaho’s water agency, and would not improperly disrupt a coherent state regulatory policy.
The panel reversed the ruling on § 42-224. Read in the context of the entire statutory scheme and its stated legislative purpose, the forfeiture procedure discriminated against the United States by jeopardizing its adjudicated stockwater rights and forcing it to defend burdensome collateral attacks. The panel therefore held § 42-224 unconstitutional as applied to the United States under the Supremacy Clause.
The panel also affirmed that § 42-113(2)(b) was facially unconstitutional. Because the provision applied only to stockwater rights associated with federally owned or managed land and created a mechanism through which grazing permittees could divest the United States of its rights, it unlawfully discriminated against the federal government. The judgment was affirmed in part and reversed in part.
Key Takeaways
- A federal constitutional challenge to state water statutes is not an in rem water-right adjudication subject to the prior-exclusive-jurisdiction doctrine.
- Burford abstention does not apply merely because a federal constitutional case touches a complex state water-rights system.
- Idaho Code § 42-224 is unconstitutional as applied to the United States, and § 42-113(2)(b) is facially invalid, because the provisions discriminate against the federal government.
Why It Matters
The decision protects federal stockwater rights already confirmed through Idaho’s comprehensive adjudication from later state-law mechanisms designed to place those rights at a disadvantage. It also confirms that courts must evaluate seemingly neutral provisions within their broader statutory context when determining whether a state has discriminated against the federal government.
More broadly, the opinion limits states’ ability to use specialized property or regulatory rules to burden federal ownership interests and confirms a federal forum for constitutional challenges even when those challenges arise within a complicated state water-law regime.