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Notice of Availability of the Beta Streamflow Duration Assessment

CEMVN-RGJ

Published April 12, 2023

Expiration date: 5/12/2023

PRINT | E-MAIL

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: https://www.epa.gov/streamflow-duration-assessment/beta-streamflow-duration-assessment-method- 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 USACE.SDAM.NESE@usace.army.mil 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: https://www.epa.gov/streamflow-duration-assessment

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

Corps:

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

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

Little Rock District, David Rupe, 501-340-1386, David.M.Rupe@usace.army.mil Louisville District, Patricia Grace-Jarrett, 502-919-0315, Patti.G.Jarrett@usace.army.mil

Louisville District, Russell Retherford, 812-853-0472, Russell.L.Retherford@usace.army.mil Memphis District, Roger Allan, 901-544-3682, Roger.S.Allan@usace.army.mil

Mobile District, Mike Moxey, 251-694-3771, Michael.B.Moxey@usace.army.mil Nashville District, Aric Payne, 423-394-5102, Aric.J.Payne@usace.army.mil

New England District, Taylor Bell, 978-318-8952, Taylor.M.Bell@usace.army.mil

New Orleans District, Jon Barmore, 504-862-1704, Jonathan.G.Barmore@usace.army.mil New York District, Tom Bruno, 917-790-8516, William.Bruno@usace.army.mil

Norfolk District, Jeanne Richardson, 434-384-0182, Jeanne.C.Richardson@usace.army.mil Philadelphia District, Mike Leggiero, 570-842-1046, Michael.P.Leggiero@usace.army.mil Pittsburgh District, Alyssa Barkley, 412-395-7209, Alyssa.B.Barkley@usace.army.mil Savannah District, Justin Hammonds, 678-804-5227, Justin.A.Hammonds@usace.army.mil St. Louis District, Chad Lamontagne, 314-331-8044, Chad.M.Lamontagne@usace.army.mil Tulsa District, Rob Hoffman, 918-669-7481, Robert.B.Hoffman@usace.army.mil Vicksburg District, Bryton Hixson, 601-634-7550, Bryton.K.Hixson@usace.army.mil

Wilmington District, Tyler Crumbley, 901-251-4170, Tyler.A.Crumbley2@usace.army.mil

EPA:

Region 1, Ray Putnam, 617-918-1523, Putnam.Raymond@epa.gov

Region 2, Stephanie Andreescu, 212-637-3818, andreescu.stephanie@epa.gov

Region 3, Christine Mazzarella, 215-814-5756, mazzarella.christine@epa.gov

Region 4, Eric Somerville, 706-355-8514, somerville.eric@epa.gov

Region 4, Kacy Sable, 404-562-9346, sable.kacy@epa.gov

Region 5, Melanie Burdick, 312-886-225, burdick.melanie@epa.gov

Region 6, Chelsey Sherwood, 214-665-6452, sherwood.chelsey@epa.gov

Region 7, Justin Kensinger, 913-551-7318, kensinger.justin.r@epa.gov

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.