That’s when he discovered the sinkhole. Authorities were called and the area was cordoned off. The sinkhole is approximately 40 feet deep and  is believed to have been caused by a collapsing vertical mineshaft.

The sinkhole has swallowed a tree and continues to grow.

For updates on this story, visit KCCI.

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Scott Jackson (right), business service consultant for WorkSource Fulton, helps job seekers with their applications in a mobile career center at a job fair hosted by Goodwill Career Center in Atlanta. (Ziyu Julian Zhu/AJC)

Credit: Ziyu Julian Zhu/AJC