Center for Biological Diversity v. U.S. Bureau of Reclamation — Ninth Circuit upholds WIIN Act contract conversions without individual environmental review

Case
Center for Biological Diversity v. United States Bureau of Reclamation
Court
U.S. Court of Appeals for the Ninth Circuit
Judge
Kim McLane Wardlaw (Bill Clinton, 1998); Daniel A. Bress (Donald Trump, 2019); Gabriel P. Sanchez (Joe Biden, 2022)
Date Decided
August 17, 2026
Docket No.
25-5137
Topics
Environmental law; NEPA; Endangered Species Act; Water contracts
Source
Read the full opinion

Background

The Water Infrastructure Improvements for the Nation Act allows Central Valley Project water-service contractors to convert their contracts into repayment contracts and prepay construction costs. Reclamation converted 67 contracts in 2020 and 2021 without preparing contract-specific environmental impact statements or consulting under the Endangered Species Act.

Environmental groups sued, alleging that the conversions could harm the Bay-Delta ecosystem and protected fish species. They contended that the Bureau of Reclamation was required to conduct NEPA review and ESA consultation before each conversion. The district court granted summary judgment to Reclamation and the contractor defendants.

The Court’s Holding

The Ninth Circuit affirmed. Section 4011(a) of the WIIN Act requires Reclamation to convert an eligible water-service contract upon the contractor’s request and permits negotiation only over payment-related terms. The statute also bars Reclamation from modifying other contractual rights, including water-delivery rights.

Because Reclamation lacks discretion during the conversion process to address environmental effects or benefit protected species, the conversions are nondiscretionary actions that do not trigger contract-specific NEPA review or ESA consultation. The court rejected the groups’ arguments based on the WIIN Act’s savings clauses, while emphasizing that Central Valley Project operations and water deliveries remain subject to systemwide environmental review and biological opinions.

Key Takeaways

  • WIIN Act contract conversions are mandatory upon request and limited to changing the payment structure.
  • NEPA and ESA Section 7 duties do not apply where an agency lacks discretion to consider environmental effects or protect listed species.
  • The ruling does not exempt Central Valley Project operations or water deliveries from programmatic environmental review.

Why It Matters

The decision distinguishes WIIN Act conversions from water-contract renewals, for which Reclamation may have greater discretion and environmental-review obligations. It permits Reclamation to continue converting qualifying contracts without separate NEPA analysis or ESA consultation for each transaction.

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