American Samoa OCS Mineral Lease Sale Aliquots and Blocks

The Marine Minerals Administration (formerly known as the Bureau of Ocean Energy Management, or BOEM) announced the Final Leasing Notice (FLN) for an Outer Continental Shelf (OCS) Mineral Lease Sale offshore American Samoa (Lease Sale PACM-1). The FLN details the provisions and conditions of the leases, including lease stipulations and information to lessees, as well as the lease areas, auction details, lease form, and lease execution. The FLN advances the leasing process to support responsible access to the critical minerals needed to strengthen U.S. supply chains, enhance energy readiness, and sustain the technologies that power the nation’s modern economy. For more information please visit https://www.boem.gov/marine-minerals/american-samoa-activitiesWhat are aliquots?Aliquots are generated from Outer Continental Shelf (OCS) blocks by subdividing each block into 16ths, and this further subdivision allows for more detailed boundary delineation in offshore energy leasing. These polygons are clipped to the Submerged Land Act Boundary and Continental Shelf Boundaries. The aliquots use a letter designation in addition to their parent protraction number and OCS block number (e.g., NK18-02, 6822F). A full OCS block is 4800 x 4800 meters, while an aliquot measures 1200 x 1200 meters. Smaller, clipped aliquots are found along the Federal/State OCS boundary and along UTM zone borders. Only the most recently published paper or PDF versions of the Official Protraction Aliquot Diagram (OPAD) should be used for official or legal purposes. These data were created in the applicable NAD83 UTM or NAD27 UTM/SPCS Projection and re-projected to GCS WGS84 (EPSG 4326) for management in BOEM's enterprise GIS. Because GIS projection and topology functions can change or generalize coordinates, these data are NOT an OFFICIAL record for the exact boundaries. These data are to be used for cartographic purposes only and should not be used to calculate area.