Public Notices Overview

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Individuals or parties may request an extension of time in which to comment on the proposed work by writing to the project manager or clicking on the project manager’s name on the public notice grid on the web page.  Any request must be specific and substantively supportive of the requested extension, and received by this office prior to the end of the initial comment period.  The Branch Chief will review the request and the requestor will be promptly notified of the decision to grant or deny the request.  If granted, the time extension will be continuous to the initial comment period and, inclusive of the initial comment period, will not exceed a total of 30 calendar days.

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Appeals of Jurisdictional Determinations and Proffered or Denied Permits. To view a table of administrative appeals within the Mississippi Valley Division, click here.

Notice of Availability of the Beta Streamflow Duration Assessment

Published April 12, 2023
Expiration date: 5/12/2023

These beta SDAMs were developed for use in all or part of the states of Maine, New Hampshire, Vermont, Massachusetts, Rhode Island, Connecticut, New Jersey, Delaware, Maryland, New York, Pennsylvania, West Virginia, Virginia, North Carolina, South Carolina, Georgia, Florida, Louisiana, Alabama, Tennessee, Kentucky, Ohio, Indiana, Arkansas, Kansas, Illinois, Michigan, Missouri, Mississippi, Oklahoma, Texas, and the District of Columbia by the Corps and EPA (Figure 1). Due to differences in climate and a relatively small amount of data points, the Caribbean sites were not used to develop this iteration of the SDAM, nor is the Carbbean covered by the methods. These beta methods result from a literature review and multi-year field study conducted at 336 stream reaches across the range of hydrologic landscapes of the Northeast and Southeast. Developed through statistical analyses of the field data, the beta SDAMs provide a data-driven approach using reliable indicators to determine streamflow duration class at the reach scale. The agencies are making these beta SDAMs available for a one year preliminary implementation and comment period to inform the development of final SDAMs for the Northeast and Southeast.

The beta SDAMs for the Northeast and Southeast can be applied whenever there is uncertainty regarding streamflow duration class and a rapid evaluation method is desired. The methods provide a scientifically supported, rapid assessment framework to support best professional judgment in a consistent, robust, repeatable, and defensible way. Use of the methods may result in timelier and more predictable jurisdictional determinations and are also useful where knowledge of streamflow duration class improves ecological assessment, management, and decision-making. The beta SDAMs were developed specifically from data collected in the Northeast and Southeast.

The methods, data forms, and training opportunities are available on the internet at: northeast-and-southeast.

Practitioners such as stream ecologists, aquatic ecologists, hydrologists, and wetland scientists are encouraged to comment on their experience using the beta SDAMs. Comments regarding the following specific topics would be especially useful:

  • Problem situations encountered and possible approaches for addressing them.
  • Seemingly incorrect results, including the factors that suggest the method was inaccurate.
  • Indicators that were particularly useful or not useful in identifying flow duration in different hydrological environments.
  • Regional differences in the applicability of specific indicators.
  • Potential uses of the methods in the regulatory context, or in other watershed planning or management contexts.

Written comments may be submitted via email to or by hard copy to: U.S. Army Corps of Engineers, Attn: CECW-CO-R, 441 G Street NW, Washington, DC 20314-1000.

For additional information on the development of regional Streamflow Duration Assessment Methods for nationwide coverage, see:

For additional information on the beta SDAM for the Northeast and Southeast, contact the Corps or the EPA:


Baltimore District, Matthew Gilbert, 412-295-2381, Buffalo District, Peter Krakowiak, 716-879-4363, Charleston District, Jeremy Kinney, 843-714-4649, Chicago District, Andrew Blackburn, 312-846-5543, Detroit District, Sabrina Miller, 313-226-7495,

Fort Worth District, Joseph Shelnutt, 817-886-1738, Galveston District, Mark Pattillo, 361-814-5847, Huntington District, Wes Barnett, 304-399-6905, Jacksonville District, Jessica Cordwell, 813-769-7067, Kansas City District, Ryan Langer, 816-389-3834,

Little Rock District, David Rupe, 501-340-1386, Louisville District, Patricia Grace-Jarrett, 502-919-0315,

Louisville District, Russell Retherford, 812-853-0472, Memphis District, Roger Allan, 901-544-3682,

Mobile District, Mike Moxey, 251-694-3771, Nashville District, Aric Payne, 423-394-5102,

New England District, Taylor Bell, 978-318-8952,

New Orleans District, Jon Barmore, 504-862-1704, New York District, Tom Bruno, 917-790-8516,

Norfolk District, Jeanne Richardson, 434-384-0182, Philadelphia District, Mike Leggiero, 570-842-1046, Pittsburgh District, Alyssa Barkley, 412-395-7209, Savannah District, Justin Hammonds, 678-804-5227, St. Louis District, Chad Lamontagne, 314-331-8044, Tulsa District, Rob Hoffman, 918-669-7481, Vicksburg District, Bryton Hixson, 601-634-7550,

Wilmington District, Tyler Crumbley, 901-251-4170,


Region 1, Ray Putnam, 617-918-1523,

Region 2, Stephanie Andreescu, 212-637-3818,

Region 3, Christine Mazzarella, 215-814-5756,

Region 4, Eric Somerville, 706-355-8514,

Region 4, Kacy Sable, 404-562-9346,

Region 5, Melanie Burdick, 312-886-225,

Region 6, Chelsey Sherwood, 214-665-6452,

Region 7, Justin Kensinger, 913-551-7318,

Figure 1. Boundaries of the regional SDAMs in the United States, including the SDAMs for the Northeast and the Southeast. Map also indicates the status of the development of the regional SDAMs at the time of this Public Notice publication.

  Figure showing the boundaries of regional SDAMs in the United States, including the SDAMs for the Northeast and the Southeast.