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The dredge areas feature class serves as a geospatial record of where individual dredge events have occurred within OCS borrow areas authorized for use by the Bureau of Ocean Energy Management (BOEM), part of the U.S. Department of the Interior. The footprint of each polygon represents the approximate lateral extent of changes to the seabed (increased depth) that have occurred directly as a result of dredging. Each polygon is delineated based on analysis and interpretation of before- and after-dredge bathymetric data, the computed bathymetric surface difference (e.g., the output surface resulting from subtracting after-dredge bathymetric data from before-data bathymetric data over an equally-sized grid). The analysis of these data enables BOEM to monitor and quantify natural and anthropogenic changes (e.g., dredged volume) to the seabed in OCS borrow areas, which facilitates comprehensive resource management and conservation. Entities are authorized to dredge sand, gravel, or shell resources from the OCS after entering into a Negotiated Non-Competitive Lease or Memorandum of Agreement with BOEM. Section 8 (k) of the OCS Lands Act (OCSLA), as amended by Public Law 103-426 (enacted in 1994), gives BOEM the authority to negotiate an agreement for the use of OCS sand, gravel, and shell resources for use in: (1) a project for shore protection, beach restoration, or coastal restoration undertaken by a Federal, State, or local government agency; or (2) for use in a construction project funded in whole or part by or authorized by the Federal government. This dataset is a collection of dredge areas under BOEM's purview. Attribution consists of state, OCS lease number, project ID, borrow area ID, construction (dredging) start and end dates, approximate dredged volume, and delineation quality; see attribute definitions for full explanations of how individual fields are calculated (if applicable). This dataset will be updated as new data are received from lessees. |
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The dredge areas feature class serves as a geospatial record of where individual dredge events have occurred within OCS borrow areas authorized for use by the Bureau of Ocean Energy Management (BOEM), part of the U.S. Department of the Interior. The footprint of each polygon represents the approximate lateral extent of changes to the seabed (increased depth) that have occurred directly as a result of dredging. Each polygon is delineated based on analysis and interpretation of before- and after-dredge bathymetric data, the computed bathymetric surface difference (e.g., the output surface resulting from subtracting after-dredge bathymetric data from before-data bathymetric data over an equally-sized grid). The analysis of these data enables BOEM to monitor and quantify natural and anthropogenic changes (e.g., dredged volume) to the seabed in OCS borrow areas, which facilitates comprehensive resource management and conservation. Entities are authorized to dredge sand, gravel, or shell resources from the OCS after entering into a Negotiated Non-Competitive Lease or Memorandum of Agreement with BOEM. Section 8 (k) of the OCS Lands Act (OCSLA), as amended by Public Law 103-426 (enacted in 1994), gives BOEM the authority to negotiate an agreement for the use of OCS sand, gravel, and shell resources for use in: (1) a project for shore protection, beach restoration, or coastal restoration undertaken by a Federal, State, or local government agency; or (2) for use in a construction project funded in whole or part by or authorized by the Federal government. This dataset is a collection of dredge areas under BOEM's purview. Attribution consists of state, OCS lease number, project ID, borrow area ID, construction (dredging) start and end dates, approximate dredged volume, and delineation quality; see attribute definitions for full explanations of how individual fields are calculated (if applicable). This dataset will be updated as new data are received from lessees. |
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Dredge area polygons represent the approximate lateral extent of where dredging of outer continental shelf (OCS) sediment has occurred within authorized OCS lease areas, which are maintained by the Bureau of Ocean Energy Management (BOEM), part of the U.S. Department of the Interior. The dredged material (e.g. sediment) is typically transported via pipeline and deposited along the shoreline of a pre-determined coastal area needing nourishment. Entities are authorized to dredge sand, gravel, or shell resources from the OCS after entering into a Negotiated Non-Competitive Lease or Memorandum of Agreement with BOEM. Section 8 (k) of the OCS Lands Act (OCSLA), as amended by Public Law 103-426 (enacted in 1994), gives BOEM the authority to negotiate an agreement for the use of OCS sand, gravel, and shell resources for use in: (1) a project for shore protection, beach restoration, or coastal restoration undertaken by a Federal, State, or local government agency; or (2) for use in a construction project funded in whole or part by or authorized by the Federal government. This dataset is a collection of dredge areas under BOEM's purview. Attribution consists of state, OCS lease number, project ID, borrow area ID, construction (dredging) start and end dates, dredged volume, and delineation quality; see attribute definitions for full explanations. This dataset will be updated as new data are received from lessees.</SPAN></P></DIV></DIV></DIV> |
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The Bureau of Ocean Energy Management (BOEM) provides the data for use "as is". BOEM provides this information with the understanding that it is not guaranteed to be accurate, correct or complete and conclusions drawn from such information are the responsibility of the user. While every effort has been made to ensure the accuracy, correctness and timeliness of materials presented within the limits of the current state of the art, BOEM assumes no responsibility for errors or omissions, nor as a result of the failure of the data to function on a particular system. BOEM makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. Users are cautioned to consider carefully the provisional nature of these data and information before using them for decisions that concern personal or public safety or the conduct of business that involves substantial monetary or operational consequences. Conclusions drawn from or actions undertaken on the basis of, such data and information are the sole responsibility of the user. The maps shown here are for illustration and planning purposes only and are not suitable for site-specific decision making. The data are not suitable for navigational purposes. Information found here should not be used for making financial or any other commitments. This data was developed by the U.S. Government; no other proprietary rights may be attached to them nor may they be sold to the U.S. Government as part of any procurement of products or services. Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the Bureau of Ocean Energy Management (BOEM) as the source of this information.</SPAN></P></DIV></DIV></DIV> |
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DredgeAreas |
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["Maine","Maryland","Massachusetts","Florida","Rhode Island","New Jersey","Georgia","North Carolina","Virginia","Delaware","South Carolina","New York","ATLANTIC OCEAN","Geology","Geophysical","Marine Mineral Resources","Sediment","Survey","Non-Energy","Sand Resources","Offshore","Sand","Outer Continental Shelf","Cubic Yards","Physical Habitats","OCS","Mining and Mineral Extraction","Dredging","Gravel","US","GULF OF MEXICO","NORTH ATLANTIC OCEAN","SEA FLOOR","Oceans","Lease","Sand","Mineral Resources","Geophysical Survey","Non-Energy","Dredging","Shoal","Bathymetric Survey","Beach Nourishment","Authorized Lease","Benthic","Oceanographic Sensors","Offshore","Physical Oceanography","Dredge Volume"] |
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en-US |
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150000000 |
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