A gas-burning generator at a Huntington Beach power plant could keep firing until as late as 2023, following a state commission’s recent vote.

The AES facility was scheduled to close by the end of next year, but the California Public Utilities Commission voted unanimously last week to extend its operating life for up to three additional years.

Pushing back the plant’s retirement would delay remediation of the site, as well as prolong the practice of “once-through” cooling — a process that uses seawater to cool the coastal energy transformers, which can kill fish and other marine life.