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US Army Corps of Engineers Regulatory Guidance Letter on the Discharge of Sediments From or Through a Dam and the Breaching of Dams, for the Purposes of Section 404 of the Clean Water Act and Section 10 of the Rivers and Harbors Act of 1899
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Scope/Content: Abstract: If a dam operator modifies or deviates from normal operation of the dam in such a manner that bottom sediment accumulated behind the dam could be removed and transported downstream through the dam, either deliberately or accidentally, that activity may require a DA permit pursuant to Section 404 and/ or Section 10. The purpose of this document is to provide guidance to Corps Districts Engineers regarding which releases of sediments from or through dams require Department of Army (DA) permits.
Legal and policy Sediment and channel dynamics Dams Dam retirement