We work closely with industry and other entities to prevent and mitigate adverse impacts of human activities on Pacific walrus, polar bears, and northern sea otters in Alaska, prevent adverse impacts to subsistence use of these species, and promote human safety in polar bear country. A significant component of this work is the issuance of incidental take authorizations under sections 101(a)(5)(A) and 101(a)(5)(D) of the Marine Mammal Protection Act. 

What We Do 

  • Provide technical assistance and share resources on how to avoid take of polar bears, northern sea otters, or Pacific walrus
  • Issue incidental harassment authorizations (IHAs) that authorize incidental take by harassment of marine mammals for up to a one-year period
  • Promulgate incidental take regulations (ITRs) that authorize incidental take of marine mammals for up to a five-year period, and issue associated incidental take Letters of Authorization (LOAs) to specific entities
  • Issue Letters of Authorization that authorize intentional harassment (hazing) of polar bears
  • Provide polar bear awareness, safety, and deterrence training
  • Work with the Marine Mammals Management species programs to apply the most current biological information in regulatory decisions
  • Consult with other local, state and federal agencies to coordinate regulatory efforts 

What Guides Us 

-Available for public comment-

In accordance with the MMPA, the Service invites public comment on proposed ITRs and IHAs before they are finalized and issued. All proposed incidental take authorizations are published in the Federal Register and have an open public comment period of 30 days or more. 

Marine Mammals; Proposed Incidental Harassment Authorization for Northern Sea Otters in Angoon, Alaska

A proposed Incidental Harassment Authorization for northern sea otters in the Southeast Alaska stock is open for public comment until April 24, 2026. The authorization has been proposed in response to a request from the Alaska Department of Transportation and Public Facilities. If finalized, it would authorize nonlethal, incidental take by harassment of small numbers of northern sea otters associated with pile driving and marine construction within Killisnoo Harbor in Angoon, Alaska. 

Once the public comment period closes, we will review all submitted comments prior to making a final determination.

More information is available at: