Tulsa District Regulatory Permits for Public Comment

PURPOSE:  The purpose of these public notices are to inform you of a proposal for work in which you might be interested and to solicit your comments and information to better enable us to make a reasonable decision on factors affecting the public interest.

SECTION 10: The U.S. Army Corps of Engineers is directed by Congress through Section 10 of the Rivers and Harbors Act of 1899 (33 USC 403) to regulate all work or structures in or affecting the course, condition, or capacity of navigable waters of the United States.  The intent of this law is to protect the navigable capacity of waters important to interstate commerce.

SECTION 404: The U.S. Army Corps of Engineers is directed by Congress through Section 404 of the Clean Water Act (33 USC 1344) to regulate the discharges of dredged and fill material into all waters of the United States.  These waters include lakes, rivers, streams, mudflats, sandflats, sloughs, wet meadows, natural ponds, and wetlands adjacent to other waters.  The intent of the law is to protect these waters from the indiscriminate discharge of material capable of causing pollution and to restore and maintain their chemical, physical, and biological integrity.

U.S. Army Corps of Engineers, Tulsa District

Regulatory Office, Chief



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

Published April 13, 2023
Expiration date: 4/30/2024

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 Caribbean 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.