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  • 2026 Nationwide Permits Regional Conditions for Illinois

    Expiration date: 3/15/2031

    The U.S. Army Corps of Engineers Rock Island District, on behalf of all Illinois districts (Chicago, St. Louis, Louisville, and Memphis), announces the reissuance of 57 Nationwide Permits (NWPs) effective March 15, 2026, through March 15, 2031. This notice provides Illinois-specific regional conditions, 401 Water Quality Certifications from IL EPA and US EPA Region 5, and Coastal Zone Management Act consistency determinations that become conditions of these NWPs for activities in Illinois waters.

  • Joint Public Notice of Availability

    Availability of the Regional Streamflow Duration Assessment Methods (Regional SDAMs) for the Arid West, Western Mountains and Great Plains. The methods are rapid assessment tools for distinguishing between ephemeral, intermittent, and perennial streamflow at the reach scale for the Arid West, Western Mountains and Great Plains regions.

  • Notice of Availability of the Beta Streamflow Duration Assessment Methods for the Northeast and Southeast

    The U.S. Army Corps of Engineers (Corps) Baltimore, Buffalo, Charleston, Chicago, Detroit, Fort Worth, Galveston, Huntington, Jacksonville, Kansas City, Little Rock, Louisville, Memphis, Mobile, Nashville, New England, New Orleans, New York, Norfolk, Philadelphia, Pittsburgh, Savannah, St. Louis, Tulsa, Vicksburg, and Wilmington Districts, and the

    View Notice of Availability

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Consolidation of Studies

The Water Resources Development Act establishes a single-phase cost-shared study process that for each feasibility study undertaken, the district engineer will develop a detailed study schedule and notify the non-federal interests.

Overviews of study schedule milestones are posted below.