Petersburg Pilot -

ANCHORAGE, Alaska (AP) — Federal regulators have ordered Hilcorp Alaska to replace a 7-mile (11-kilometer) undersea pipeline after a helicopter pilot spotted a natural gas leak bubbling to the surface last week.

The Pipeline and Hazardous Materials Safety Administration on Tuesday said the company must also submit and the agency must approve a restart plan before the line in Cook Inlet can resume operations.

The leak is the fifth one for the line since 2014, the Anchorage Daily News reported.

The line must be temporarily repaired by April 17 and permanently repaired by May 1, the federal...