Munitions and Explosives of Concern

Munitions and explosives of concern (MEC) have been deposited on the seabed of the United States Outer Continental Shelf since World War I. The bulk of these munitions have originated from the U.S. Armed Forces while conducting military training exercises, war-time placement, and disposal and dumping activities. Since 1972, ocean disposal of munitions and other pollutants has been banned by the Marine Protection, Research, and Sanctuaries Act. Federal and state efforts to mitigate, map, monitor, and sometimes remove these munitions are ongoing. The term MEC defines a collection of munitions including a) unexploded ordnance, b) discarded military munitions, and c) munition constituents that are present in high enough concentrations to pose an explosive hazard. Additional information on the location of MECs can be found in the data and references listed below: Formerly Used Defense Sites Danger Zones and Restricted Areas U.S. Disposal of Chemical Weapons in the Ocean: Background and Issues for Congress. CRS Report for Congress, January 3, 2007 Defense Environmental Programs Annual Report to Congress for Fiscal Year 2009. Chapter 10. Sea Disposal of Military Munitions Direct data download | Metadata This item is curated by the Marine Cadastre team. Find more information at marinecadastre.gov.自第一次世界大战以来，美国外大陆架的海底已沉积了大量受关注弹药与爆炸物（Munitions and explosives of concern, MEC）。此类弹药绝大多数为美国武装部队在开展军事训练演习、战时部署以及处置倾倒作业过程中遗留的物资。1972年起，《海洋保护、研究与保护区法案》（Marine Protection, Research, and Sanctuaries Act）已明令禁止向海洋倾倒弹药及其他污染物。目前，联邦与州级层面正持续推进相关工作，以缓解此类弹药带来的风险、绘制其分布地图、开展监测，并在必要时进行清除作业。 受关注弹药与爆炸物（MEC）的定义涵盖三类弹药：a）未爆炸弹药；b）废弃军用弹药；c）浓度过高且具备爆炸危险的弹药成分。 有关MEC分布的更多信息可从以下列出的数据与参考文献中获取： 1. 前国防用地危险区域与受限区域 2. 《美国在海洋中处置化学武器：国会背景与议题》，美国国会研究服务处（CRS）国会报告，2007年1月3日 3. 《2009财年国会国防环境项目年度报告》第十章：军用弹药海上处置 直接数据下载 | 元数据（Metadata） 本数据集由海洋地籍（Marine Cadastre）团队维护，更多信息可访问marinecadastre.gov。