gov.noaa.nmfs.inport:39972 eng UTF8 dataset Office of Coast Survey resourceProvider Keown, Patrick 240-533-0031 1315 East West Hwy Silver Spring MD 20910-3282 patrick.keown@noaa.gov pointOfContact 2026-03-04T19:17:18 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) Coastal Maintained Channels in US waters enc_coastal_maint_chnls 2015-12 publication NOAA/NMFS/EDM 39972 https://www.fisheries.noaa.gov/inport/item/39972 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information https://encdirect.noaa.gov/arcgis/rest/services/NavigationChartData/MarineTransportation/MapServer WWW:LINK-1.0-http--link Citation URL REST service 1 for data access. download https://encdirect.noaa.gov/arcgis/rest/services/NavigationChartData/MarineTransportation/MapServer/1 WWW:LINK-1.0-http--link Citation URL REST service 2 for data access. download This layer shows coastal channels and waterways that are maintained and surveyed by the U.S. Army Corps of Engineers (USACE). These channels are necessary transportation systems that serve economic and national security interests. The possibility of silting is always present. Local authorities should be consulted for the controlling depth. NOS Charts frequently show controlling depths in a table, which is kept current by the US Coast Guard Local Notice to Mariners. To support coastal and ocean planning and other activities pursuant to the Coastal Zone Management Act, Energy Policy Act, Magnuson-Stevens Fishery Conservation and Management Act, National Environmental Policy Act, Rivers and Harbors Act and the Submerged Lands Act completed Keown, Patrick 240-533-0031 1315 East West Hwy Silver Spring MD 20910-3282 patrick.keown@noaa.gov pointOfContact Keown, Patrick 240-533-0031 1315 East West Hwy Silver Spring MD 20910-3282 patrick.keown@noaa.gov custodian weekly OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > GULF OF AMERICA place Global Change Master Directory (GCMD) Location Keywords 20.8 Marine Boundaries Socioeconomics theme NOS Data Explorer Topic Category Dredged channels National Shipping U.S. Waters theme Atlantic Coastal Waters Gulf of Mexico Pacific United States place DOC/NOAA/NOS/OCS > Office of Coast Survey, National Ocean Service, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2017-04-24 publication 8.5 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian ocs project InPort otherRestrictions Cite As: Office of Coast Survey, [Date of Access]: Coastal Maintained Channels in US waters [Data Date Range], https://www.fisheries.noaa.gov/inport/item/39972. NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose. otherRestrictions Access Constraints: None otherRestrictions Use Constraints: These data are intended for coastal and ocean use planning. Not for navigation. otherRestrictions Distribution Liability: Not for navigation. unclassified NOAA Data Management Plan (DMP) NOAA/NMFS/EDM 39972 https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/ocs/dmp/pdf/39972.pdf WWW:LINK-1.0-http--link NOAA Data Management Plan (DMP) NOAA Data Management Plan for this record on InPort. information crossReference vector eng; US boundaries elevation environment oceans transportation -179.46 174.6 9.31 60.98 | Currentness: Ground Condition 2001-07-11 The condition of navigation channels is reported to NOAA by USACE on a regular basis. As the USACE performs hydrographic surveys of the maintained channels they provide NOAA with the results of these surveys. The survey results are provided on survey sheets and/or channel condition reports. Hydrographic survey sheets depict the hydrography within the maintained channel as well as the channel limits. The surveys are either a condition or after dredge survey. A condition survey, among other things, depicts hydrography prior to dredging operations and the after dredge survey shows the results of dredging operations. Channel condition reports are a tabulated format of the results of a hydrographic survey. The channel condition reports contain the names of all the reaches in a particular channel. Along with each reach name the project dimensions are listed and they include the reach's width, project depth and length. Additionally for each reach controlling depths are listed for the separate quarters of that reach and the date of the survey from which those controlling depths were taken. The controlling depths are determined by USACE and are the shoalest depths for that quarter of the reach. A channel condition report will also contain more detailed information concerning the location of extreme shoaling or obstructions that may be located in the channel. (Coastal Channel Data: Cooperative Production of a NOAA/USACE Data Framework, Libeau and Morrison 2005) false eng false Data Table CoastalMaintainedChannels 2018-12-14 publication Shapefile Office of Coast Survey 1315 East West Highway Silver Spring MD 20910 https://www.nauticalcharts.noaa.gov/ WWW:LINK-1.0-http--link Office of Coast Survey Website Website listed for Office of Coast Survey information distributor https://encdirect.noaa.gov/theme_layers/data/coastal_maintained_channels/maintainedchannels.zip WWW:LINK-1.0-http--link https://encdirect.noaa.gov/theme_layers/data/coastal_maintained_channels/maintainedchannels.zip Downloadable Data download dataset Accuracy This dataset is derived from NOAA ENC's which conforms to the International Hydrographic Organization Transfer Standard for Digital Hydrographic Data, Special Publication S-57, ENC Product Specification Edition 2.0. Horizontal Positional Accuracy Maximum scale of intended use is 1:80,000. Completeness Report Coastal maintained channels in U.S. waters represents current coverage of all ENC Charts. The NOAA ENC Chart Suite is not scheduled to be completed until 2015. As new NOAA ENCs and NOAA ENC editions are created they will be added to the NOAA ENC Direct to GIS data on the first of every month. Conceptual Consistency Coastal maintained channels in U.S. waters data is derived from NOAA ENC's which conforms to the International Hydrographic Organization Transfer Standard for Digital Hydrographic Data, Special Publication S-57, ENC Product Specification Edition 2.0. NOAA ENC Direct to GIS data has added generalized nautical chart symbology to aid in the visualization of this data. This dataset has been built from a combination of charted information as well as original "source" information. NOAA has compiled critical features such as channel limits, aids to navigation, and obstructions from the original documents that were used to put the feature on the paper chart. The objective is to use the most accurate information for features that are critical to the safety of navigation. NOAA uses a number of sources in compiling NOAA ENCS including U.S. Army Corps of Engineers surveys, drawings, and permits, U.S. Coast Guard Local Notices to Mariner, National Imagery and Mapping Agency Notices to Mariners, NOAA hydrographic surveys, and the largest scale paper chart of an area. 2015-12-01T00:00:00 Source Contribution: A geometric representation in polygon format of an area designated as a navigable channel, maintained by the USACE and derived from an NOAA Electronic Navigational Chart. | Type of Source Media: online ENC Dredged Areas 2013-05-01 publication NOAA Electronic Navigational Chart https://encdirect.noaa.gov/ WWW:LINK-1.0-http--link Source Citation URL Data source link. information publisher 2013-05