Massachusetts Bay Closure Lines
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These GIS data show the 'Bay Closure Lines' that constitute a part of the legal boundary between Commonwealth and Federal waters. These lines extend seaward of the typical three nautical mile boundary and were set by a Special Master appointed by the Supreme Court of the United States as part of UNITED STATES v. MAINE, 475 U.S. 89 (1986). These GIS lines are created from the bay closure line coordinates set forth by the Special Master.
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