Research

The Coastal Barrier Resources Act (CBRA) requires the Secretary of the Interior to review the maps of the  John H. Chafee Coastal Barrier Resources System John H. Chafee Coastal Barrier Resources System
Learn more about the John H. Chafee Coastal Barrier Resources System, which was established under the Coastal Barrier Resources Act in 1982.

Learn more about John H. Chafee Coastal Barrier Resources System
 (CBRS) at least once every 5 years and make such minor and technical modifications necessary to reflect changes in the size or location of the CBRS units as a result of natural forces (16 U.S.C. 3503(c)).

The U.S. Fish and Wildlife Service (Service) conducted the 5-year review in 2023 for the following areas: all the CBRS units in Georgia and Maine, the 21 units in the Great Lakes region of New York, and certain units in Florida and Louisiana. A stakeholder review period for Federal, State, and local officials was held from November 3 through December 4, 2023. The Federal Register Notice of Availability (88 FR 75621) contains summaries of the proposed modifications for individual CBRS units and instructions for providing comments on regulations.gov or by mail or hand-delivery. The draft boundaries may be viewed using the CBRS 5-Year Review Web Mapping Application, A shapefile of the draft boundaries is also available below. Now that the stakeholder review period has closed, we are reviewing the comments received and making any changes that are appropriate and consistent with our authority to make administrative modifications to the CBRS. We are also preparing final maps, which will be adopted upon publication of a second notice in the Federal Register. Additional CBRS areas are planned for 5-year review in 2025 and 2026.

Please note that through this project, we consider changes to the maps that are consistent with our administrative authority to modify the CBRS boundaries, which is limited to: (1) changes that have occurred as a result of natural forces such as erosion and accretion; (2) voluntary additions to the CBRS by property owners; and (3) additions of excess federal property to the CBRS (16 U.S.C. 3503(c)-(e)). Other types of changes to the CBRS boundaries are generally not considered under this project. Additional information regarding methodology can be found in the Federal Register notices linked above.

Previous 5-Year Review Efforts

Effective Date of 5-Year Review Changes
Federal Register Notice Announcing Proposed Changes
Federal Register Notice Adopting Revised Maps
Affected Areas
Map Date
Additional Information
8/16/202387 FR 7135288 FR 55710116 CBRS units in Michigan, Minnesota, Mississippi, Ohio, South Carolina, Texas, and Wisconsin. See Federal Register for full list of affected units. 12/30/2022This review also included the CBRS units in North Carolina, but we did not prepare final revised maps for that state because sufficient data was not available in some areas (see the FR notices for additional information).
12/14/201681 FR 7013081 FR 90375121 CBRS units in Louisiana, Puerto Rico, and the U.S. Virgin Islands. See Federal Register for full list of affected units.11/15/2016Visit the Service's archive for this map revision.
3/14/201680 FR 7182681 FR 13407247 CBRS units in Alabama, Florida, Georgia, Louisiana, Michigan, Minnesota, Mississippi, New York (Great Lakes region), Ohio, and Wisconsin. See Federal Register for full list of affected units.1/11/2016Visit the Service's archive for this map revision.
5/4/201579 FR 3320780 FR 25314182 CBRS units in Maine, Maryland, New Jersey, New York, North Carolina, and Virginia. See Federal Register for full list of affected units.8/1/2014Visit the Service's archive for this map revision.
4/17/201478 FR 5346779 FR 2178769 CBRS units in Delaware, North Carolina, South Carolina, Florida, and Texas. See Federal Register for full list of affected units.12/6/2013Visit the Service's archive for this map revision.
2/24/1997N/A62 FR 825828 CBRS units in Maine, Massachusetts, New York, New Jersey, Maryland, Virginia, North Carolina, Florida, Alabama, and the U.S. Virgin Islands (ME-17, ME-18, MA-03, C01B, MA-20P, MA-24, C28, C31, D02B, NY-04P, NY-50, F10, NJ-09, MD-03, MD-37P, MD-38, VA-09, VA-23, VA-36, L07, L09, P16, P17, FL-89, FL-99, FL-101, Q01A, VI-07)7/12/1996The entire CBRS was reviewed at this time, and changes were only identified for 28 units.
N/A54 FR 19248N/AOne CBRS unit in Virginia (K03)N/AThe entire CBRS was reviewed at this time, and changes were only identified in one unit. The proposed change was not finalized.

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Coastal Barrier Resources System 5-Year Review Batch 2 (2023) Shapefile

The Coastal Barrier Resources Act (CBRA; 16 U.S.C. 3501 et. seq.) requires the Secretary of the Interior (Secretary) to review the maps of the John H. Chafee Coastal Barrier Resources System (CBRS) at least once every 5 years and make any minor and technical modifications to the boundaries of...

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Aerial view of an undeveloped coastal freshwater pond.
We administer the Coastal Barrier Resources Act (CBRA), which encourages the conservation of storm-prone and dynamic coastal barriers by withdrawing the availability of federal funding and financial assistance within a designated set of units known as the Coastal Barrier Resources System (CBRS)....
A rocky shoreline of a river. The water is calm. Mist and green branches line the river.
The Ecological Services Program works to restore and protect healthy populations of fish, wildlife, and plants and the environments upon which they depend. Using the best available science, we work with federal, state, Tribal, local, and non-profit stakeholders, as well as private land owners, to...