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An underutilized and cost-effective resource for understanding how these artificial barriers perform is the record of existing structures within California.USACE Coastal Structures were digitized as part of the nation-wide Navigation and Coastal Databank Program, which was concurrently operating in both San Francisco and Los Angeles USACE Districts between 2009 and 2011. This feature class is a compilation of geographic data digitized from various sources, including Coastal Structures Program Project Management Plans and the Enterprise Coastal Inventory Database. This dataset only includes Corps maintained jetties, breakwaters, groins and training walls. MC Barriers were obtained from the Coastal Regional Sediment Management Information System, and was last updated by John Carotta for CSMW in July, 2007. This dataset contained both man-made and natural barriers, mostly headlands. 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