S. D. Warren Co. v. Maine Bd. of Env. Protection
Case Date: 07/10/2025
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S. D. Warren Co. v. Maine Board of Environmental Protection, 547 U.S. 370 (2006), was a case decided by the Supreme Court of the United States involving licensing requirements under the Clean Water Act. The Court ruled unanimously that hydroelectric dams were subject to section 401 of the Act, which conditioned federal licensing for a licensed activity that could result in "any discharge" into navigable waters upon the receipt of a state certification that water protection laws would not be violated. The Court believed that since the Act did not define the word "discharge" it should be given its ordinary meaning, such that the simple flowing forth of water from a dam qualified.
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