Skip to main content
U.S. flag

An official website of the United States government

This site is currently in beta, and your feedback is helping shape its ongoing development.

Thunder Bay National Marine Sanctuary Boundary (polygon)

Published by Office of National Marine Sanctuaries | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: December 18, 2025 | Last Modified: 2004-12-01T00:00:00.000+00:00
The Office of National Marine Sanctuaries manages a system of sanctuaries and othermanaged areas around the country. The legal boundaries of These sanctuaries aredefined within the Code of Federal Regulations, at 15 C.F.R. Part 922 and thesubparts for each national marine sanctuary. The GIS compatible digital boundaryfiles for each national marine sanctuary are representations of those legalboundaries and are based on the best available data. These files are availablefor public use at locations defined in this metadata record.

data.gov

An official website of the GSA's Technology Transformation Services

Looking for U.S. government information and services?
Visit USA.gov