October Term 2005 · Docket 04-1527

Does water passing through a dam count as a discharge under the Clean Water Act?

S. D. Warren argues water moving through its dams is not a discharge. Maine and the United States argue it is a discharge.

Official caption
S. D. Warren Co. v. Maine Bd. of Environmental Protection
Latest argument session
Latest official Court activity
Latest verified event
Argued
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Official Transcript

Verified source milestones

  1. — An official oral-argument transcript was verified.
  2. — An official oral-argument transcript was verified.

The arguments, in order

This case may have been argued more than once. Each entry below uses that session's official transcript. Later arguments do not erase earlier ones.

  1. Argument 1 ·

    What happened at the argument

    Mr. Rowe argued the water flow through the dams is a discharge.

    Mr. Kayatta argued the river is a single body of water.

    Mr. Minear argued the term discharge means flowing out.

    Justice Scalia asked if the water is unchanged below the dam.

    Read the official transcript for this argument · Official argument details

    Sources used for this argument breakdown

A citizen's guide to the whole case

What this case is about

The case tests whether water flowing through a dam is a discharge. This status triggers state water-quality certification requirements.

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How the case got here

The Supreme Court heard oral argument in this case on February 21, 2006.

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What each side wants

S. D. Warren wants the Court to rule that water passing through its dams is not a discharge.

Maine and the United States want the Court to rule that water passing through the dams is a discharge.

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What each side says

S. D. Warren argues the river is a single body of water. It claims moving water through a dam is not a discharge into that same body.

Maine and the United States argue the term discharge means flowing out. They claim operating the dams results in a discharge into navigable waters.

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What the justices asked

Justice Stevens asked if the water has a slightly different chemical composition.

Chief Justice Roberts asked if the water is a discharge even if it is the same water.

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Why it matters

The outcome determines whether states can require water-quality certifications for hydropower dams. This affects how states regulate water quality near dams.

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What happens next

This article currently covers the argument record. Use the official docket link for later case activity.

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Official Court provenance

Official docket and case history · Official Supreme Court oral-argument detail page

Title and summary sources

Revision history

  1. Revision 1 · Official Transcript ·

    Correction: Rewritten to the concise citizen-facing editorial standard.

  2. Revision 2 · Official Transcript ·

    Correction: Migrated to the dated official Court activity contract without model use.

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