The St. Louis-based natural gas company Spire Inc. is asking the U.S. Supreme Court to allow it to keep operating a pipeline through Illinois and Missouri, warning that a winter shutdown could be devastating to St. Louis-area customers.

In a filing last week, Spire requested a stay that would allow operation of its Spire STL Pipeline until the issue is resolved in the courts.

If the Supreme Court declines to take up the case, operation of the pipeline could cease on Dec. 13 unless the Federal Energy Regulatory Commission extends an emergency order granted in September.