major federal action
- A contemplated federal initiative, which according to the National Environmental Policy Act, must undergo an environmental impact assessment if it has substantial implications for the environment
- The proposed dam construction was considered a major federal action because it could significantly alter the regional environment.
- A proposed interstate highway expansion is a typical example of a major federal action as it can deeply impact nearby ecosystems.
- Before the federal government could proceed with its ambitious energy project, it had to determine if it was a major federal action with the potential for significant environmental effects.