Alaska underwater pipeline leak may have started in December

A federal pipeline safety office says natural gas leaking from an underwater pipeline in Alaska’s Cook Inlet may have started flowing in December.
Gas from the pipeline was spotted bubbling to the surface Feb. 7.
[Related: Hilcorp pipeline leaking natural gas into Alaska’s Cook Inlet]
But the U.S. Pipeline and Hazardous Materials Administration says a flow analysis indicates it started leaking in late December.
The agency has issued a proposed safety order requiring the line to