A crumbling mineshaft caused the 40-foot-by-40-foot sinkhole that closed part of the highway, state transportation officials said.

Construction crews are working around the clock to repair the ginormous hole along I-80 near Exit 40 in Wharton that caused massive traffic delays a day after Christmas.

The sinkhole that cratered a section of I-80 in New Jersey was caused by an abandoned mineshaft collapsing underneath the highway, state transportation officials say.

New Jersey Department of Transportation crews have stabilized the area around the massive 40 foot-by-40-foot sinkhole in Wharton, NJ.The collapse of an abandoned mineshaft is the cause of that sinkhole that has shut down part of Interstate 80 (I-80).

A 40-foot by 40-foot sinkhole formed on the right shoulder of eastbound Interstate 80 near exit 34 in Wharton in Morris County Thursday morning. The sinkhole was caused by the collapse of an abandoned mineshaft,