Overview

The identification and location of jurisdictional waters of the United States, including wetlands regulated by the U.S. Army Corps of Engineers under Section 404 of the Clean Water Act and Sections 9 and 10 of the Rivers and Harbors Act, is determined through a process known as a Jurisdictional Determination (JD). The Corps uses a multi-parameter approach defined in the Corps' Wetland Delineation Manual, dated January 1987, and supplemental guidance (including Regional Supplements) when making wetland determinations. View graphics generally depicting the extent of Section 10 and Section 404 jurisdiction. 

On 18 January 2023, the U.S. Environmental Protection Agency and the U.S. Department of the Army (“the agencies”) published a regulation in the Federal Register revising the definition of “waters of the United States” (“the 2023 Rule”). This 2023 Rule became effective on 20 March 2023.  Information on the current definition of "waters of the United States" is provided at: https://www.epa.gov/wotus/current-implementation-waters-united-states. Additional updates on the "waters of the United States" definition may be found at: https://www.usace.army.mil/missions/civil-works/regulatory-program-and-permits/.

Specific information regarding jurisdictional determinations and user information are located at the following link:  <Use same Link>. Regional Supplements to Corps Delineation Manual, including wetland determination data forms can be found at:  https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/reg_supp/

Please click on the following icon to submit a jurisdictional determination request  

Information needed for jurisdictional determinations can be found below.

• Regulatory Guidance Letter 16-01 (RGL 16-01)

NOTE:  The forms attached to RGL 16-01 have been superseded by the following documents:

JD Request Fillable Form: Effective immediately, the following new fillable form, ENG 6247 (Request for Jurisdictional Determination), should be used by members of the public who wish to request a USACE JD. Click on this link for ENG FORM 6247.

Preliminary JD Fillable Form:  ENG 6249 is for use by the Corps to document their results of a PJD.  Click on this link for ENG FORM 6249.

• Baltimore District JD Information Checklist

Regional Supplements to the U.S. Army Corps of Engineers Wetland Delineation Manual are part of a nationwide effort to address regional wetland characteristics and improve the accuracy and efficiency of wetland-delineation procedures. Regional differences in climate, geology, soils, hydrology, plant and animal communities, and other factors are important to the identification and functioning of wetlands. These supplements were developed by wetland delineation experts from state and federal agencies and academia with experience within this area. Where differences in the two documents occur, the Regional Supplement takes precedence over the Corps Manual.

The Baltimore District is currently using three Regional Supplements:

1. Atlantic and Gulf Coastal Plain Supplement

• Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Atlantic and Gulf Coastal Plain Region (Version 2.0)
• Field Testing Protocol
• Administrative Record for Atlantic and Gulf Coastal Plain Supplement
• Atlantic and Coastal Plain Supplement Public Comments and Responses
• Atlantic and Gulf Coastal Plain Peer Review Comments and Responses

2. Eastern Mountains and Piedmont Supplement

• Regional Supplement to the COE Wetland Delineation Manual: Eastern Mountains and Piedmont
• Eastern Mountains and Piedmont Supplement Peer-Review Comments
• Eastern Mountains and Piedmont Supplement Public Comments and Responses

3. Northcentral and Northeast Supplement

• Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Northcentral and Northeast Region (Version 2.0)
• Administrative Record for Northcentral and Northeast Region Supplement
• Northcentral and Northeast Peer Review Comments and Responses
• Northcentral and Northeast Public Comments and Responses

The U.S. Army Corps of Engineers, as part of an interagency effort with the U.S. Environmental Protection Agency, the U.S. Fish and Wildlife Service, and the U.S. Department of Agriculture Natural Resources Conservation Service, is announcing the availability of the final 2022 National Wetland Plant List (NWPL). The Federal Register Notice for the 2022 NWPL update can be found here: https://www.govinfo.gov/content/pkg/FR-2024-02-13/pdf/2024-02903.pdf.

The NWPL provides plant species wetland indicator status ratings, which are used in determining whether the hydrophytic vegetation factor is met when conducting wetland delineations under the Clean Water Act and wetland determinations under the Wetland Conservation Provisions of the Food Security Act. Other applications of the NWPL include wetland restoration, establishment, and enhancement projects. The list is effective as of 13 February 2024 and will be used in any wetland delineations performed after this date. Completed wetland delineation/determination forms should reference the version of the NWPL used to complete the form.  The final NWPL is available at https://wetland-plants.sec.usace.army.mil/ (preferred browsers are Chrome and Firefox). 

Updated versions of the Automated Wetland Determination Data Sheets (ADS), which reflect revisions to the NWPL, can be found at the following link: https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/reg_supp/ within the “General Information” dropdown.  More info regarding the ADS and its utility in wetland delineation can be found at the following link: https://www.usace.army.mil/Media/Announcements/Article/2989646/5-april-2022-army-corps-of-engineers-announces-the-release-of-automated-wetland/.”

While the RRS is the best way to submit a request for a jurisdictional determination or verification of a delineation by the Corps of Engineers, a property owner may still request a jurisdictional determination or verification of delineation from the Corps of Engineers using the following procedures when unable to submit a request in RRS. Submitted requests should include the information identified on the Baltimore District Jurisdictional Determination Checklist. The final determination of whether an area is waters of the United States, including jurisdictional wetlands, and whether the activity requires a permit must be made by a Corps District Office.

Please send your requests for Jurisdictional Determinations in Maryland, the District of Columbia, and military bases in Northern Virginia to:

U.S. Army Corps of Engineers, Baltimore District
ATTN: Regulatory Branch
2 Hopkins Plaza
Baltimore, Maryland 21201

Email NAB-Regulatory@usace.army.mil with subject line as Maryland Jurisdictional Determination, District of Columbia Jurisdictional Determination, or Northern Virginia Jurisdictional Determination.

Please send your requests for Jurisdictional Determinations for that area of the Commonwealth of Pennsylvania in the Baltimore District Regulatory boundaries to:

U.S. Army Corps of Engineers, Baltimore District
Pennsylvania Field Office
1631 South Atherton Street
State College, Pennsylvania 16801

Email NAB-Regulatory@usace.army.mil with subject line as Pennsylvania Jurisdictional Determination.