NOAAFinal Rule

Takes of Marine Mammals Incidental to Specified Activities: Alaska LNG Project in Cook Inlet

EnergyEnvironment

Summary

This regulation allows the Alaska LNG Project to proceed in Cook Inlet while establishing rules to minimize harm to marine mammals like whales and sea otters during construction and operations. The federal government is permitting some unavoidable animal deaths and injuries as a tradeoff for the natural gas development project, but requires the company to monitor impacts and take steps to reduce them.

Key Points

  • 1The Alaska LNG Project can move forward in Cook Inlet, but must follow strict rules to protect marine mammals during construction and operation
  • 2The regulation allows some marine mammals to be injured or killed during project activities, but sets limits on how many deaths are acceptable
  • 3The company must monitor wildlife impacts, use protective equipment like acoustic deterrents to warn animals away, and report findings to federal regulators
  • 4This affects Cook Inlet residents and communities that depend on fishing, as well as endangered beluga whales and other marine life in the area
  • 5The regulation requires ongoing environmental checks to ensure marine mammals aren't harmed more than predicted, with potential project changes if impacts exceed limits

Impact Assessment

If you are an Energy Company operating the Alaska LNG Project, this means you must implement marine mammal monitoring and mitigation measures during construction and operations, accept permitted levels of animal injury or death, and incur compliance costs for environmental protections in Cook Inlet.

Impact Level
Major
Geographic Scope

State-specific

Compliance Cost

Significant

Who is Affected
Energy CompaniesWorkers/LaborersState GovernmentsTribal Nations

Key Dates

Published

December 11, 2025

Regulatory Connections

Amends CFR Sections
50 CFR Part 216
Other Documents in This Rulemaking (NOAA-NMFS-2025-0141)

This summary is for informational purposes only. It may not capture all nuances of the regulation. Always refer to the official text for authoritative information.