Updated

A massive oil spill in northwestern North Dakota still isn't fully cleaned up three years and three months after it happened.

The company responsible hasn't even set a date for completion.

Crews have been working around the clock to deal with the Tesoro Corp. pipeline break, which happened in a wheat field in September 2013.

But North Dakota Health Department environmental scientist Bill Suess said that less than a third of the 840,000 gallons that spilled has been recovered — or ever will be.

Some say that one of the largest onshore oil spills recorded in the U.S. serves as a cautionary example, especially given a recent pipeline break about 150 miles south and ongoing debates over the four-state Dakota Access pipeline.