NOAA chart reveals underwater hazard for proposed anchorage area near Bayou Goula Crossing channel of Mississippi River. Cartographers from NOAA’s Office of Coast Survey recently flagged a potentially dangerous situation during their review of a proposed federal rule establishing new anchorage areas on the Mississippi River. The proposed anchorage areas were based on non-NOAA charts that did not depict the underwater pipelines. The pipelines, which carry benzene, posed a potential danger if ships dropped anchor on top of them. The pipeline areas are depicted on the NOAA nautical chart.