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Regulatory Public Notices

The U.S. Army Corps of Engineers regulates activities affecting wetlands and other waters of the United States under Section 10 of the Rivers and Harbors Act of 1899 and Section 404 of the Clean Water Act. Public involvement is central to this process, with input from agencies, tribes, organizations, and citizens helping ensure balanced, informed permit decisions that support development while protecting aquatic resources.

This section provides current and historical regulatory announcements, including project updates and public notices. These materials promote transparency and keep the public informed about ongoing reviews and program developments.

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  • Compensatory mitigation for aquatic resource loss

    The purpose of this notice is to inform the public that the U.S. Army Corps of Engineers, Portland District (Corps) may require additional compensatory mitigation for unavoidable impacts and permanent losses of certain waters of the United States. USACE has developed a list of Aquatic Resources of Special Concern (ARSC) to identify and define those aquatic resources that are unique, difficult to replace, and/or have high ecological function. The list of ARSC, with definitions, is attached.